EFI updates for v5.6
Subsystems (5)
Ard Biesheuvel
maintainerIngo, Thomas,
Please consider the pull request below. I am anticipating some more changes for this cycle, but it would be good to get these queued up and into -next sooner rather than later, since there is some risk of breakage even though the changes have been tested on a variety of hardware.
If you have the stomach to go over them in detail: please take into account that these patches modify the same efi_call_xxx() macro definitions multiple times, in order to be bisectable, so please consider the end result first before commenting on coding style of the intermediate changes.
NOTE: this series depends on the efi-urgent PR that I just sent out, so please merge tip/efi/urgent into tip/efi/core before applying the changes below.
Thanks and happy Christmas,
Ard.
The following changes since commit 77217fcc8e04f27127b32825376ed508705fd946:
x86/efistub: disable paging at mixed mode entry (2019-12-23 16:25:21 +0100)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git tags/efi-next
for you to fetch changes up to c51a0735389b92cb0025137af0034773773ad7da:
efi/libstub/x86: avoid globals to store context during mixed mode calls (2019-12-24 15:32:22 +0100)
----------------------------------------------------------------
EFI changes for v5.6:
- Cleanup of the GOP [graphics output] handling code in the EFI stub (Arvind)
- Inspired by the above, and with a little bit of Arvind's help, a complete refactor of the mixed mode handling in the x86 EFI stub, getting rid of a lot of ugly and unnecessary wrapping and typecasting. This is a worthwhile cleanup by itself, but it also addresses a recurring issue where stub code often fails to compile on non-x86 because all the casting and thunking via variadic wrapper routines is masking problems in the code.
----------------------------------------------------------------
Ard Biesheuvel (21):
efi/libstub: remove unused __efi_call_early() macro efi/x86: rename efi_is_native() to efi_is_mixed() efi/libstub: use a helper to iterate over a EFI handle array efi/libstub: extend native protocol definitions with mixed_mode aliases efi/libstub: distinguish between native/mixed not 32/64 bit efi/libstub: drop explicit 32/64-bit protocol definitions efi/libstub: use stricter typing for firmware function pointers efi/libstub: annotate firmware routines as __efiapi efi/libstub/x86: avoid thunking for native firmware calls efi/libstub: avoid protocol wrapper for file I/O routines efi/libstub: get rid of 'sys_table_arg' macro parameter efi/libstub: unify the efi_char16_printk implementations efi/libstub/x86: drop __efi_early() export and efi_config struct efi/libstub: drop sys_table_arg from printk routines efi/libstub: remove 'sys_table_arg' from all function prototypes efi/libstub/x86: work around page freeing issue in mixed mode efi/libstub: drop protocol argument from efi_call_proto() macro efi/libstub: drop 'table' argument from efi_table_attr() macro efi/libstub: rename efi_call_early/_runtime macros to be more intuitive efi/libstub: tidy up types and names of global cmdline variables efi/libstub/x86: avoid globals to store context during mixed mode calls
Arvind Sankar (4):
efi/gop: Remove bogus packed attribute from GOP structures efi/gop: Remove unused typedef
efi/gop: Convert GOP structures to typedef and cleanup some types efi/gop: Unify 32/64-bit functions
arch/arm/include/asm/efi.h | 17 +- arch/arm64/include/asm/efi.h | 16 +- arch/x86/Kconfig | 11 +- arch/x86/boot/compressed/Makefile | 2 +- arch/x86/boot/compressed/eboot.c | 290 +++++----- arch/x86/boot/compressed/eboot.h | 30 +- arch/x86/boot/compressed/efi_stub_32.S | 87 --- arch/x86/boot/compressed/efi_stub_64.S | 5 - arch/x86/boot/compressed/efi_thunk_64.S | 17 +- arch/x86/boot/compressed/head_32.S | 64 +-- arch/x86/boot/compressed/head_64.S | 97 +--- arch/x86/include/asm/efi.h | 77 ++- arch/x86/platform/efi/efi.c | 12 +- arch/x86/platform/efi/efi_64.c | 6 +- arch/x86/platform/efi/quirks.c | 2 +- arch/x86/xen/efi.c | 2 +- drivers/firmware/efi/libstub/arm-stub.c | 110 ++-- drivers/firmware/efi/libstub/arm32-stub.c | 70 ++- drivers/firmware/efi/libstub/arm64-stub.c | 32 +- drivers/firmware/efi/libstub/efi-stub-helper.c | 278 +++++----- drivers/firmware/efi/libstub/efistub.h | 48 +- drivers/firmware/efi/libstub/fdt.c | 53 +- drivers/firmware/efi/libstub/gop.c | 163 +----- drivers/firmware/efi/libstub/random.c | 77 ++- drivers/firmware/efi/libstub/secureboot.c | 11 +- drivers/firmware/efi/libstub/tpm.c | 48 +- include/linux/efi.h | 730 +++++++++++-------------- 27 files changed, 914 insertions(+), 1441 deletions(-) delete mode 100644 arch/x86/boot/compressed/efi_stub_32.S delete mode 100644 arch/x86/boot/compressed/efi_stub_64.S
Ard Biesheuvel
maintainerPATCH 1/25 efi/gop: Remove bogus packed attribute from GOP structures
From: Arvind Sankar <[email protected]>
EFI structures are not packed, they follow natural alignment.
The packed attribute doesn't have any effect on the structure layout due to the types and order of the members, and we only ever get these structures as output from the EFI firmware so alignment issues have not come up.
--- include/linux/efi.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
include/linux/efi.h +4 -4
@@ -1429,7 +1429,7 @@ struct efi_graphics_output_mode_info {int pixel_format;struct efi_pixel_bitmask pixel_information;u32 pixels_per_scan_line; -} __packed; +};struct efi_graphics_output_protocol_mode_32 {u32 max_mode;
@@ -1438,7 +1438,7 @@ struct efi_graphics_output_protocol_mode_32 {u32 size_of_info;u64 frame_buffer_base;u32 frame_buffer_size; -} __packed; +};struct efi_graphics_output_protocol_mode_64 {u32 max_mode;
@@ -1447,7 +1447,7 @@ struct efi_graphics_output_protocol_mode_64 {u64 size_of_info;u64 frame_buffer_base;u64 frame_buffer_size; -} __packed; +};struct efi_graphics_output_protocol_mode {u32 max_mode;
@@ -1456,7 +1456,7 @@ struct efi_graphics_output_protocol_mode {unsigned long size_of_info;u64 frame_buffer_base;unsigned long frame_buffer_size; -} __packed; +};struct efi_graphics_output_protocol_32 {u32 query_mode;
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 2/25 efi/gop: Remove unused typedef
In reply to Ard BiesheuvelFrom: Arvind Sankar <[email protected]>
We have stopped using gop->query_mode(), so remove the unused typedef for the function prototype.
--- include/linux/efi.h | 4 ---- 1 file changed, 4 deletions(-)
include/linux/efi.h +0 -4
@@ -1479,10 +1479,6 @@ struct efi_graphics_output_protocol {struct efi_graphics_output_protocol_mode *mode; }; -typedef efi_status_t (*efi_graphics_output_protocol_query_mode )( -struct efi_graphics_output_protocol *,u32 ,unsigned long *, -struct efi_graphics_output_mode_info **); -extern struct list_head efivar_sysfs_list; static inline void
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 3/25 efi/gop: Convert GOP structures to typedef and cleanup some types
In reply to Ard BiesheuvelFrom: Arvind Sankar <[email protected]>
Use typedef for the GOP structures, in anticipation of unifying 32/64-bit code. Also use more appropriate types in the non-bitness specific structures for the framebuffer address and pointers.
--- drivers/firmware/efi/libstub/gop.c | 26 ++++++++--------- include/linux/efi.h | 46 +++++++++++++++--------------- 2 files changed, 36 insertions(+), 36 deletions(-)
drivers/firmware/efi/libstub/gop.c +13 -13
@@ -35,7 +35,7 @@ static void find_bits(unsigned long mask, u8 *pos, u8 *size)static void setup_pixel_info (struct screen_info *si,u32 pixels_per_scan_line, -struct efi_pixel_bitmask pixel_info,int pixel_format) +efi_pixel_bitmask_t pixel_info,int pixel_format) {if (pixel_format ==PIXEL_RGB_RESERVED_8BIT_PER_COLOR ) { si->lfb_depth =32 ;
@@ -87,13 +87,13 @@ static efi_status_t setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si, efi_guid_t *proto, unsigned long size, void **gop_handle) { -struct efi_graphics_output_protocol_32 *gop32, *first_gop; +efi_graphics_output_protocol_32_t *gop32, *first_gop;unsigned long nr_gops;u16 width, height;u32 pixels_per_scan_line;u32 ext_lfb_base; -u64 fb_base; -struct efi_pixel_bitmask pixel_info; +efi_physical_addr_t fb_base; +efi_pixel_bitmask_t pixel_info;int pixel_format;efi_status_t status;u32 *handles = (u32 *)(unsigned long )gop_handle;
@@ -104,13 +104,13 @@ setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si, nr_gops = size /sizeof (u32);for (i =0 ; i < nr_gops; i++) { -struct efi_graphics_output_protocol_mode_32 *mode; -struct efi_graphics_output_mode_info *info =NULL ; +efi_graphics_output_protocol_mode_32_t *mode; +efi_graphics_output_mode_info_t *info =NULL ;efi_guid_t conout_proto =EFI_CONSOLE_OUT_DEVICE_GUID ;bool conout_found = false;void *dummy =NULL ;efi_handle_t h = (efi_handle_t )(unsigned long )handles[i]; -u64 current_fb_base; +efi_physical_addr_t current_fb_base; status =efi_call_early (handle_protocol, h, proto, (void **)&gop32);
@@ -184,13 +184,13 @@ static efi_status_t setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si, efi_guid_t *proto, unsigned long size, void **gop_handle) { -struct efi_graphics_output_protocol_64 *gop64, *first_gop; +efi_graphics_output_protocol_64_t *gop64, *first_gop;unsigned long nr_gops;u16 width, height;u32 pixels_per_scan_line;u32 ext_lfb_base; -u64 fb_base; -struct efi_pixel_bitmask pixel_info; +efi_physical_addr_t fb_base; +efi_pixel_bitmask_t pixel_info;int pixel_format;efi_status_t status;u64 *handles = (u64 *)(unsigned long )gop_handle;
@@ -201,13 +201,13 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si, nr_gops = size /sizeof (u64);for (i =0 ; i < nr_gops; i++) { -struct efi_graphics_output_protocol_mode_64 *mode; -struct efi_graphics_output_mode_info *info =NULL ; +efi_graphics_output_protocol_mode_64_t *mode; +efi_graphics_output_mode_info_t *info =NULL ;efi_guid_t conout_proto =EFI_CONSOLE_OUT_DEVICE_GUID ;bool conout_found = false;void *dummy =NULL ;efi_handle_t h = (efi_handle_t )(unsigned long )handles[i]; -u64 current_fb_base; +efi_physical_addr_t current_fb_base; status =efi_call_early (handle_protocol, h, proto, (void **)&gop64);
include/linux/efi.h +23 -23
92 lines not on this page · raw message
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 4/25 efi/gop: Unify 32/64-bit functions
In reply to Ard BiesheuvelFrom: Arvind Sankar <[email protected]>
Use efi_table_attr macro to deal with 32/64-bit firmware using the same source code.
--- drivers/firmware/efi/libstub/gop.c | 134 ++++------------------------- 1 file changed, 18 insertions(+), 116 deletions(-)
drivers/firmware/efi/libstub/gop.c +18 -116
@@ -83,108 +83,14 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line, } } -static efi_status_t -setup_gop32 (efi_system_table_t *sys_table_arg,struct screen_info *si, -efi_guid_t *proto,unsigned long size,void **gop_handle) -{ -efi_graphics_output_protocol_32_t *gop32, *first_gop; -unsigned long nr_gops; -u16 width, height; -u32 pixels_per_scan_line; -u32 ext_lfb_base; -efi_physical_addr_t fb_base; -efi_pixel_bitmask_t pixel_info; -int pixel_format; -efi_status_t status; -u32 *handles = (u32 *)(unsigned long )gop_handle; -int i; - - first_gop =NULL ; - gop32 =NULL ; - - nr_gops = size /sizeof (u32); -for (i =0 ; i < nr_gops; i++) { -efi_graphics_output_protocol_mode_32_t *mode; -efi_graphics_output_mode_info_t *info =NULL ; -efi_guid_t conout_proto =EFI_CONSOLE_OUT_DEVICE_GUID ; -bool conout_found = false; -void *dummy =NULL ; -efi_handle_t h = (efi_handle_t )(unsigned long )handles[i]; -efi_physical_addr_t current_fb_base; - - status =efi_call_early (handle_protocol, h, - proto, (void **)&gop32); -if (status !=EFI_SUCCESS ) -continue ; - - status =efi_call_early (handle_protocol, h, - &conout_proto, &dummy); -if (status ==EFI_SUCCESS ) - conout_found = true; - - mode = (void *)(unsigned long )gop32->mode; - info = (void *)(unsigned long )mode->info; - current_fb_base = mode->frame_buffer_base; - -if ((!first_gop || conout_found) && - info->pixel_format !=PIXEL_BLT_ONLY ) { -/* -* Systems that use the UEFI Console Splitter may -* provide multiple GOP devices, not all of which are -* backed by real hardware. The workaround is to search -* for a GOP implementing the ConOut protocol, and if -* one isn't found, to just fall back to the first GOP. -*/ - width = info->horizontal_resolution; - height = info->vertical_resolution; - pixel_format = info->pixel_format; - pixel_info = info->pixel_information; - pixels_per_scan_line = info->pixels_per_scan_line; - fb_base = current_fb_base; - -/* -* Once we've found a GOP supporting ConOut, -* don't bother looking any further. -*/ - first_gop = gop32; -if (conout_found) -break ; - } - } - -/* Did we find any GOPs? */ -if (!first_gop) -return EFI_NOT_FOUND ; - -/* EFI framebuffer */ - si->orig_video_isVGA =VIDEO_TYPE_EFI ; - - si->lfb_width = width; - si->lfb_height = height; - si->lfb_base = fb_base; - - ext_lfb_base = (u64 )(unsigned long )fb_base >>32 ; -if (ext_lfb_base) { - si->capabilities |=VIDEO_CAPABILITY_64BIT_BASE ; - si->ext_lfb_base = ext_lfb_base; - } - - si->pages =1 ; - -setup_pixel_info (si, pixels_per_scan_line, pixel_info, pixel_format); - - si->lfb_size = si->lfb_linelength * si->lfb_height; - - si->capabilities |=VIDEO_CAPABILITY_SKIP_QUIRKS ; - -return EFI_SUCCESS ; -} +#define efi_gop_attr (table, attr, instance) \ + (efi_table_attr(efi_graphics_output_protocol##table, attr, instance))static efi_status_t -setup_gop64 (efi_system_table_t *sys_table_arg,struct screen_info *si, -efi_guid_t *proto,unsigned long size,void **gop_handle) +setup_gop (efi_system_table_t *sys_table_arg,struct screen_info *si, +efi_guid_t *proto,unsigned long size,void **handles) { -efi_graphics_output_protocol_64_t *gop64, *first_gop; +efi_graphics_output_protocol_t *gop, *first_gop;unsigned long nr_gops;u16 width, height;u32 pixels_per_scan_line;
@@ -193,24 +99,26 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,efi_pixel_bitmask_t pixel_info;int pixel_format;efi_status_t status; -u64 *handles = (u64 *)(unsigned long )gop_handle;int i; +bool is64 =efi_is_64bit (); first_gop =NULL ; - gop64 =NULL ; + gop =NULL ; - nr_gops = size /sizeof (u64); + nr_gops = size / (is64 ?sizeof (u64) :sizeof (u32));for (i =0 ; i < nr_gops; i++) { -efi_graphics_output_protocol_mode_64_t *mode; +efi_graphics_output_protocol_mode_t *mode;efi_graphics_output_mode_info_t *info =NULL ;efi_guid_t conout_proto =EFI_CONSOLE_OUT_DEVICE_GUID ;bool conout_found = false;void *dummy =NULL ; -efi_handle_t h = (efi_handle_t )(unsigned long )handles[i]; +efi_handle_t h = (efi_handle_t )(unsigned long ) + (is64 ? ((u64 *)handles)[i] + : ((u32 *)handles)[i]);efi_physical_addr_t current_fb_base; status =efi_call_early (handle_protocol, h, - proto, (void **)&gop64); + proto, (void **)&gop);if (status !=EFI_SUCCESS )continue ;
@@ -219,9 +127,9 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,if (status ==EFI_SUCCESS ) conout_found = true; - mode = (void *)(unsigned long )gop64->mode; - info = (void *)(unsigned long )mode->info; - current_fb_base = mode->frame_buffer_base; + mode = (void *)(unsigned long)efi_gop_attr(, mode, gop); + info = (void *)(unsigned long )efi_gop_attr (_mode, info, mode); + current_fb_base =efi_gop_attr (_mode, frame_buffer_base, mode);if ((!first_gop || conout_found) && info->pixel_format !=PIXEL_BLT_ONLY ) {
@@ -243,7 +151,7 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,* Once we've found a GOP supporting ConOut, * don't bother looking any further. */ - first_gop = gop64; + first_gop = gop;if (conout_found)break ; }
@@ -298,13 +206,7 @@ efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,if (status !=EFI_SUCCESS ) goto free_handle; -if (efi_is_64bit ()) { - status =setup_gop64 (sys_table_arg, si, proto, size, - gop_handle); - }else { - status =setup_gop32 (sys_table_arg, si, proto, size, - gop_handle); - } + status =setup_gop (sys_table_arg, si, proto, size, gop_handle); free_handle:efi_call_early (free_pool, gop_handle);
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 5/25 efi/libstub: remove unused __efi_call_early() macro
In reply to Ard BiesheuvelThe macro __efi_call_early() is defined by various architectures but never used. Let's get rid of it.
--- arch/arm/include/asm/efi.h | 1 - arch/arm64/include/asm/efi.h | 1 - arch/x86/include/asm/efi.h | 3 --- 3 files changed, 5 deletions(-)
arch/arm/include/asm/efi.h +0 -1
@@ -51,7 +51,6 @@ void efi_virtmap_unload(void);/* arch specific definitions used by the stub code */ #define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__) -#define __efi_call_early (f, ...) f(__VA_ARGS__)#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__)#define efi_is_64bit () (false)
arch/arm64/include/asm/efi.h +0 -1
@@ -94,7 +94,6 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base, }#define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__) -#define __efi_call_early (f, ...) f(__VA_ARGS__)#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__)#define efi_is_64bit () (true)
arch/x86/include/asm/efi.h +0 -3
@@ -233,9 +233,6 @@ static inline bool efi_is_64bit(void)__efi_early ()->call (efi_table_attr (efi_boot_services, f, \ __efi_early()->boot_services), __VA_ARGS__) -#define __efi_call_early (f, ...) \ - __efi_early()->call((unsigned long)f, __VA_ARGS__); -#define efi_call_runtime (f, ...) \ __efi_early()->call(efi_table_attr(efi_runtime_services, f, \ __efi_early()->runtime_services), __VA_ARGS__)
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 6/25 efi/x86: rename efi_is_native() to efi_is_mixed()
In reply to Ard BiesheuvelThe ARM architecture does not permit combining 32-bit and 64-bit code at the same privilege level, and so EFI mixed mode is strictly a x86 concept.
In preparation of turning the 32/64 bit distinction in shared stub code to a native vs mixed one, refactor x86's current use of the helper function efi_is_native() into efi_is_mixed().
--- arch/x86/include/asm/efi.h | 10 ++++++---- arch/x86/platform/efi/efi.c | 8 ++++---- arch/x86/platform/efi/efi_64.c | 4 ++-- arch/x86/platform/efi/quirks.c | 2 +- 4 files changed, 13 insertions(+), 11 deletions(-)
arch/x86/include/asm/efi.h +6 -4
@@ -153,17 +153,19 @@ extern u64 efi_setup;#ifdef CONFIG_EFI -static inline bool efi_is_native (void ) +static inline bool efi_is_mixed (void ) { -return IS_ENABLED (CONFIG_X86_64 ) ==efi_enabled (EFI_64BIT ); +if (!IS_ENABLED (CONFIG_EFI_MIXED )) +return false; +return IS_ENABLED (CONFIG_X86_64 ) && !efi_enabled (EFI_64BIT ); }static inline bool efi_runtime_supported (void ) { -if (efi_is_native ()) +if (!efi_is_mixed ())return true; -if (IS_ENABLED (CONFIG_EFI_MIXED ) && !efi_enabled (EFI_OLD_MEMMAP )) +if (!efi_enabled (EFI_OLD_MEMMAP ))return true;return false;
arch/x86/platform/efi/efi.c +4 -4
@@ -828,7 +828,7 @@ static bool should_map_region(efi_memory_desc_t *md)* Map all of RAM so that we can access arguments in the 1:1 * mapping when making EFI runtime calls. */ -if (IS_ENABLED (CONFIG_EFI_MIXED ) && !efi_is_native ()) { +if (efi_is_mixed ()) {if (md->type ==EFI_CONVENTIONAL_MEMORY || md->type ==EFI_LOADER_DATA || md->type ==EFI_LOADER_CODE )
@@ -903,7 +903,7 @@ static void __init kexec_enter_virtual_mode(void)* kexec kernel because in the initial boot something else might * have been mapped at these virtual addresses. */ -if (!efi_is_native () ||efi_enabled (EFI_OLD_MEMMAP )) { +if (efi_is_mixed () ||efi_enabled (EFI_OLD_MEMMAP )) {efi_memmap_unmap ();clear_bit (EFI_RUNTIME_SERVICES , &efi.flags);return ;
@@ -1040,7 +1040,7 @@ static void __init __efi_enter_virtual_mode(void)efi_sync_low_kernel_mappings (); -if (efi_is_native ()) { +if (!efi_is_mixed ()) { status = phys_efi_set_virtual_address_map( efi.memmap.desc_size * count, efi.memmap.desc_size,
@@ -1071,7 +1071,7 @@ static void __init __efi_enter_virtual_mode(void)*/ efi.runtime_version = efi_systab.hdr.revision; -if (efi_is_native ()) +if (!efi_is_mixed ())efi_native_runtime_setup ();else efi_thunk_runtime_setup ();
arch/x86/platform/efi/efi_64.c +2 -2
@@ -388,7 +388,7 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)* text and allocate a new stack because we can't rely on the * stack pointer being < 4GB. */ -if (!IS_ENABLED (CONFIG_EFI_MIXED ) ||efi_is_native ()) +if (!efi_is_mixed ())return 0 ; page =alloc_page (GFP_KERNEL |__GFP_DMA32);
@@ -449,7 +449,7 @@ void __init efi_map_region(efi_memory_desc_t *md)* booting in EFI mixed mode, because even though we may be * running a 64-bit kernel, the firmware may only be 32-bit. */ -if (!efi_is_native () &&IS_ENABLED (CONFIG_EFI_MIXED )) { +if (efi_is_mixed ()) { md->virt_addr = md->phys_addr;return ; }
arch/x86/platform/efi/quirks.c +1 -1
@@ -397,7 +397,7 @@ static void __init efi_unmap_pages(efi_memory_desc_t *md)* EFI runtime calls, hence don't unmap EFI boot services code/data * regions. */ -if (!efi_is_native ()) +if (efi_is_mixed ())return ;if (kernel_unmap_pages_in_pgd (pgd, pa, md->num_pages))
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 7/25 efi/libstub: use a helper to iterate over a EFI handle array
In reply to Ard BiesheuvelIterating over a EFI handle array is a bit finicky, since we have to take mixed mode into account, where handles are only 32-bit while the native efi_handle_t type is 64-bit.
So introduce a helper, and replace the various occurrences of this pattern.
--- arch/x86/boot/compressed/eboot.c | 14 +++++--------- drivers/firmware/efi/libstub/gop.c | 9 ++------- include/linux/efi.h | 13 +++++++++++++ 3 files changed, 20 insertions(+), 16 deletions(-)
arch/x86/boot/compressed/eboot.c +5 -9
@@ -135,6 +135,7 @@ static void setup_efi_pci(struct boot_params *params)unsigned long size =0 ;unsigned long nr_pci;struct setup_data *data; +efi_handle_t h;int i; status = efi_call_early(locate_handle,
@@ -164,14 +165,11 @@ static void setup_efi_pci(struct boot_params *params)while (data && data->next) data = (struct setup_data *)(unsigned long )data->next; - nr_pci = size / (efi_is_64bit () ?sizeof (u64) :sizeof (u32)); -for (i =0 ; i < nr_pci; i++) { +for_each_efi_handle (h, pci_handle, size, i) {efi_pci_io_protocol_t *pci =NULL ;struct pci_setup_rom *rom; - status =efi_call_early (handle_protocol, -efi_is_64bit () ? ((u64 *)pci_handle)[i] - : ((u32 *)pci_handle)[i], + status =efi_call_early (handle_protocol, h, &pci_proto, (void **)&pci);if (status !=EFI_SUCCESS || !pci)continue ;
@@ -266,6 +264,7 @@ setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size)void **uga_handle =NULL ;efi_uga_draw_protocol_t *uga =NULL , *first_uga;unsigned long nr_ugas; +efi_handle_t handle;int i; status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
@@ -283,13 +282,10 @@ setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) width =0 ; first_uga =NULL ; - nr_ugas = size / (efi_is_64bit () ?sizeof (u64) :sizeof (u32)); -for (i =0 ; i < nr_ugas; i++) { +for_each_efi_handle (handle, uga_handle, size, i) {efi_guid_t pciio_proto =EFI_PCI_IO_PROTOCOL_GUID ;u32 w, h, depth, refresh;void *pciio; -unsigned long handle =efi_is_64bit () ? ((u64 *)uga_handle)[i] - : ((u32 *)uga_handle)[i]; status =efi_call_early (handle_protocol, handle, uga_proto, (void **)&uga);
drivers/firmware/efi/libstub/gop.c +2 -7
@@ -91,7 +91,6 @@ setup_gop(efi_system_table_t *sys_table_arg, struct screen_info *si, efi_guid_t *proto, unsigned long size, void **handles) { efi_graphics_output_protocol_t *gop, *first_gop; -unsigned long nr_gops;u16 width, height;u32 pixels_per_scan_line;u32 ext_lfb_base;
@@ -99,22 +98,18 @@ setup_gop(efi_system_table_t *sys_table_arg, struct screen_info *si,efi_pixel_bitmask_t pixel_info;int pixel_format;efi_status_t status; +efi_handle_t h;int i; -bool is64 =efi_is_64bit (); first_gop =NULL ; gop =NULL ; - nr_gops = size / (is64 ?sizeof (u64) :sizeof (u32)); -for (i =0 ; i < nr_gops; i++) { +for_each_efi_handle (h, handles, size, i) {efi_graphics_output_protocol_mode_t *mode;efi_graphics_output_mode_info_t *info =NULL ;efi_guid_t conout_proto =EFI_CONSOLE_OUT_DEVICE_GUID ;bool conout_found = false;void *dummy =NULL ; -efi_handle_t h = (efi_handle_t )(unsigned long ) - (is64 ? ((u64 *)handles)[i] - : ((u32 *)handles)[i]);efi_physical_addr_t current_fb_base; status = efi_call_early(handle_protocol, h,
include/linux/efi.h +13 -0
@@ -48,6 +48,19 @@ typedef u16 efi_char16_t; /* UNICODE character */typedef u64 efi_physical_addr_t ;typedef void *efi_handle_t ; +#define efi_get_handle_at (array, idx) \ + (efi_is_64bit() ? (efi_handle_t)(unsigned long)((u64 *)(array))[idx] \ + : (efi_handle_t)(unsigned long)((u32 *)(array))[idx]) + +#define efi_get_handle_num (size) \ + ((size) / (efi_is_64bit() ? sizeof(u64) : sizeof(u32))) + +#define for_each_efi_handle (handle, array, size, i) \ + for (i = 0; \ + i < efi_get_handle_num(size) && \ + ((handle = efi_get_handle_at((array), i)) || true); \ + i++) +/* * The UEFI spec and EDK2 reference implementation both define EFI_GUID as * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 8/25 efi/libstub: extend native protocol definitions with mixed_mode aliases
In reply to Ard BiesheuvelIn preparation of moving to a native vs. mixed mode split rather than a 32 vs. 64 bit split when it comes to invoking EFI firmware services, update all the native protocol definitions and redefine them as unions containing an anonymous struct for the native view and a struct called 'mixed_mode' describing the 32-bit view of the protocol when called from 64-bit code.
While at it, flesh out some PCI I/O member definitions that we will be needing shortly.
--- arch/x86/boot/compressed/eboot.h | 15 +- drivers/firmware/efi/libstub/arm-stub.c | 4 +- drivers/firmware/efi/libstub/random.c | 22 +- include/linux/efi.h | 496 ++++++++++++++++-------- 4 files changed, 357 insertions(+), 180 deletions(-)
arch/x86/boot/compressed/eboot.h +11 -4
@@ -24,10 +24,17 @@ typedef struct { u64 blt; } efi_uga_draw_protocol_64_t; -typedef struct { -void *get_mode; -void *set_mode; -void *blt; +typedef union { +struct { +void *get_mode; +void *set_mode; +void *blt; + }; +struct { +u32 get_mode; +u32 set_mode; +u32 blt; + } mixed_mode; }efi_uga_draw_protocol_t ;#endif /* BOOT_COMPRESSED_EBOOT_H */
drivers/firmware/efi/libstub/arm-stub.c +2 -2
@@ -40,9 +40,9 @@ static u64 virtmap_base = EFI_RT_VIRTUAL_BASE;void efi_char16_printk (efi_system_table_t *sys_table_arg,efi_char16_t *str) { -struct efi_simple_text_output_protocol *out; +efi_simple_text_output_protocol_t *out; - out = (struct efi_simple_text_output_protocol *)sys_table_arg->con_out; + out = (efi_simple_text_output_protocol_t *)sys_table_arg->con_out; out->output_string (out, str); }
drivers/firmware/efi/libstub/random.c +14 -8
@@ -9,7 +9,7 @@#include "efistub.h" -typedef struct efi_rng_protocol efi_rng_protocol_t ; +typedef union efi_rng_protocol efi_rng_protocol_t ; typedef struct { u32 get_info;
@@ -21,11 +21,17 @@ typedef struct {u64 get_rng; } efi_rng_protocol_64_t; -struct efi_rng_protocol { -efi_status_t (*get_info)(struct efi_rng_protocol *, -unsigned long *,efi_guid_t *); -efi_status_t (*get_rng)(struct efi_rng_protocol *, -efi_guid_t *,unsigned long ,u8 *out); +union efi_rng_protocol { +struct { +efi_status_t (*get_info)(efi_rng_protocol_t *, +unsigned long *,efi_guid_t *); +efi_status_t (*get_rng)(efi_rng_protocol_t *, +efi_guid_t *,unsigned long ,u8 *out); + }; +struct { +u32 get_info; +u32 get_rng; + } mixed_mode; }; efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg,
@@ -33,7 +39,7 @@ efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg, {efi_guid_t rng_proto =EFI_RNG_PROTOCOL_GUID ;efi_status_t status; -struct efi_rng_protocol *rng =NULL ; +efi_rng_protocol_t *rng =NULL ; status =efi_call_early (locate_protocol, &rng_proto,NULL , (void **)&rng);
@@ -162,7 +168,7 @@ efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg)efi_guid_t rng_proto =EFI_RNG_PROTOCOL_GUID ;efi_guid_t rng_algo_raw =EFI_RNG_ALGORITHM_RAW ;efi_guid_t rng_table_guid =LINUX_EFI_RANDOM_SEED_TABLE_GUID ; -struct efi_rng_protocol *rng =NULL ; +efi_rng_protocol_t *rng =NULL ;struct linux_efi_random_seed *seed =NULL ;efi_status_t status;
include/linux/efi.h +330 -166
586 lines not on this page · raw message
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 9/25 efi/libstub: distinguish between native/mixed not 32/64 bit
In reply to Ard BiesheuvelCurrently, we support mixed mode by casting all boot time firmware calls to 64-bit explicitly on native 64-bit systems, and to 32-bit on 32-bit systems or 64-bit systems running with 32-bit firmware.
Due to this explicit awareness of the bitness in the code, we do a lot of casting even on generic code that is shared with other architectures, where mixed mode does not even exist. This casting leads to loss of coverage of type checking by the compiler, which we should try to avoid.
So instead of distinguishing between 32-bit vs 64-bit, distinguish between native vs mixed, and limit all the nasty casting and pointer mangling to the code that actually deals with mixed mode.
--- arch/arm/include/asm/efi.h | 2 +- arch/arm64/include/asm/efi.h | 2 +- arch/x86/boot/compressed/eboot.c | 3 +- arch/x86/include/asm/efi.h | 35 ++++++++++++--- .../firmware/efi/libstub/efi-stub-helper.c | 45 +++++++------------ include/linux/efi.h | 6 +-- 6 files changed, 49 insertions(+), 44 deletions(-)
arch/arm/include/asm/efi.h +1 -1
@@ -52,7 +52,7 @@ void efi_virtmap_unload(void);#define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__)#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__) -#define efi_is_64bit () (false) +#define efi_is_native () (true)#define efi_table_attr (table, attr, instance) \ ((table##_t *)instance)->attr
arch/arm64/include/asm/efi.h +1 -1
@@ -95,7 +95,7 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,#define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__)#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__) -#define efi_is_64bit () (true) +#define efi_is_native () (true)#define efi_table_attr (table, attr, instance) \ ((table##_t *)instance)->attr
arch/x86/boot/compressed/eboot.c +1 -2
@@ -63,8 +63,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)* large romsize. The UEFI spec limits the size of option ROMs to 16 * MiB so we reject any ROMs over 16 MiB in size to catch this. */ - romimage = (void *)(unsigned long )efi_table_attr (efi_pci_io_protocol, - romimage, pci); + romimage =efi_table_attr (efi_pci_io_protocol, romimage, pci); romsize =efi_table_attr (efi_pci_io_protocol, romsize, pci);if (!romimage || !romsize || romsize >SZ_16M )return EFI_INVALID_PARAMETER ;
arch/x86/include/asm/efi.h +28 -7
@@ -222,21 +222,42 @@ static inline bool efi_is_64bit(void)return __efi_early ()->is64; } -#define efi_table_attr (table, attr, instance) \ - (efi_is_64bit() ? \ - ((table##_64_t *)(unsigned long)instance)->attr : \ - ((table##_32_t *)(unsigned long)instance)->attr) +static inline bool efi_is_native (void ) +{ +if (!IS_ENABLED (CONFIG_X86_64 )) +return true; +return efi_is_64bit (); +} + +#define efi_mixed_mode_cast (attr) \ + __builtin_choose_expr( \ + __builtin_types_compatible_p(u32, __typeof__(attr)), \ + (unsigned long)(attr), (attr)) + +#define efi_table_attr (table, attr, instance) ({ \ + __typeof__(((table##_t *)0)->attr) __ret; \ + if (efi_is_native()) { \ + __ret = ((table##_t *)(unsigned long)instance)->attr; \ + } else { \ + __ret = (__typeof__(__ret))efi_mixed_mode_cast( \ + ((table##_t *)(unsigned long)instance)->mixed_mode.attr);\ + } \ + __ret; \ +})#define efi_call_proto (protocol, f, instance, ...) \ - __efi_early()->call(efi_table_attr(protocol, f, instance), \ + __efi_early()->call((unsigned long) \ + efi_table_attr(protocol, f, instance), \ instance, ##__VA_ARGS__)#define efi_call_early (f, ...) \ - __efi_early()->call(efi_table_attr(efi_boot_services, f, \ + __efi_early()->call((unsigned long) \ + efi_table_attr(efi_boot_services, f, \ __efi_early()->boot_services), __VA_ARGS__)#define efi_call_runtime (f, ...) \ - __efi_early()->call(efi_table_attr(efi_runtime_services, f, \ + __efi_early()->call((unsigned long) \ + efi_table_attr(efi_runtime_services, f, \ __efi_early()->runtime_services), __VA_ARGS__)extern bool efi_reboot_required (void );
drivers/firmware/efi/libstub/efi-stub-helper.c +15 -30
57 lines not on this page · raw message
include/linux/efi.h +3 -3
@@ -49,11 +49,11 @@ typedef u64 efi_physical_addr_t;typedef void *efi_handle_t ;#define efi_get_handle_at (array, idx) \ - (efi_is_64bit() ? (efi_handle_t)(unsigned long)((u64 *)(array))[idx] \ + (efi_is_native() ? (array)[idx] \ : (efi_handle_t)(unsigned long)((u32 *)(array))[idx])#define efi_get_handle_num (size) \ - ((size) / (efi_is_64bit() ? sizeof(u64) : sizeof(u32))) + ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))#define for_each_efi_handle (handle, array, size, i) \ for (i = 0; \
@@ -805,7 +805,7 @@ typedef struct {typedef union {struct {efi_guid_t guid; -unsigned long table; +void *table; };efi_config_table_32_t mixed_mode; }efi_config_table_t ;
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 10/25 efi/libstub: drop explicit 32/64-bit protocol definitions
In reply to Ard BiesheuvelNow that we have incorporated the mixed mode protocol definitions into the native ones using unions, we no longer need the separate 32/64 bit struct definitions, with the exception of the EFI system table definition and the boot services, runtime services and configuration table definitions. So drop the unused ones.
--- arch/x86/boot/compressed/eboot.h | 12 -- drivers/firmware/efi/libstub/random.c | 10 -- include/linux/efi.h | 245 +------------------------- 3 files changed, 1 insertion(+), 266 deletions(-)
arch/x86/boot/compressed/eboot.h +0 -12
@@ -12,18 +12,6 @@#define DESC_TYPE_CODE_DATA (1 << 0) -typedef struct { -u32 get_mode; -u32 set_mode; -u32 blt; -}efi_uga_draw_protocol_32_t ; - -typedef struct { -u64 get_mode; -u64 set_mode; -u64 blt; -}efi_uga_draw_protocol_64_t ; - typedef union { struct { void *get_mode;
drivers/firmware/efi/libstub/random.c +0 -10
@@ -11,16 +11,6 @@typedef union efi_rng_protocol efi_rng_protocol_t ; -typedef struct { -u32 get_info; -u32 get_rng; -}efi_rng_protocol_32_t ; - -typedef struct { -u64 get_info; -u64 get_rng; -}efi_rng_protocol_64_t ; - union efi_rng_protocol { struct { efi_status_t (*get_info)(efi_rng_protocol_t *,
include/linux/efi.h +1 -244
317 lines not on this page · raw message
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 11/25 efi/libstub: use stricter typing for firmware function pointers
In reply to Ard BiesheuvelWe will soon remove another level of pointer casting, so let's make sure all type handling involving firmware calls at boot time is correct.
--- arch/x86/boot/compressed/eboot.c | 10 ++++++---- arch/x86/boot/compressed/eboot.h | 9 ++++++--- arch/x86/platform/efi/efi.c | 4 ++-- arch/x86/xen/efi.c | 2 +- drivers/firmware/efi/libstub/efi-stub-helper.c | 5 +++-- drivers/firmware/efi/libstub/tpm.c | 4 ++-- include/linux/efi.h | 12 ++++++++---- 7 files changed, 28 insertions(+), 18 deletions(-)
arch/x86/boot/compressed/eboot.c +6 -4
@@ -70,7 +70,8 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) size = romsize +sizeof (*rom); - status =efi_call_early (allocate_pool,EFI_LOADER_DATA , size, &rom); + status =efi_call_early (allocate_pool,EFI_LOADER_DATA , size, + (void **)&rom);if (status !=EFI_SUCCESS ) {efi_printk (sys_table,"Failed to allocate memory for 'rom'\n" );return status;
@@ -195,9 +196,9 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)struct setup_data *data, *new;efi_status_t status;u32 size =0 ; -void *p; +apple_properties_protocol_t *p; - status =efi_call_early (locate_protocol, &guid,NULL , &p); + status =efi_call_early (locate_protocol, &guid,NULL , (void **)&p);if (status !=EFI_SUCCESS )return ;
@@ -212,7 +213,8 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params) do { status = efi_call_early(allocate_pool, EFI_LOADER_DATA, - size + sizeof(struct setup_data), &new); + size + sizeof(struct setup_data), + (void **)&new); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to allocate memory for 'properties'\n"); return;
arch/x86/boot/compressed/eboot.h +6 -3
@@ -12,9 +12,12 @@#define DESC_TYPE_CODE_DATA (1 << 0) -typedef union { +typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t ; + +union efi_uga_draw_protocol {struct { - void *get_mode; +efi_status_t (*get_mode)(efi_uga_draw_protocol_t *, +u32 *,u32 *,u32 *,u32 *);void *set_mode;void *blt; };
@@ -23,6 +26,6 @@ typedef union {u32 set_mode; u32 blt; } mixed_mode; -} efi_uga_draw_protocol_t; +};#endif /* BOOT_COMPRESSED_EBOOT_H */
arch/x86/platform/efi/efi.c +2 -2
@@ -385,7 +385,7 @@ static int __init efi_systab_init(void *phys) tmp |= systab64->con_in; efi_systab.con_out_handle = systab64->con_out_handle; tmp |= systab64->con_out_handle; - efi_systab.con_out = systab64->con_out; + efi_systab.con_out = (void *)(unsigned long )systab64->con_out; tmp |= systab64->con_out; efi_systab.stderr_handle = systab64->stderr_handle; tmp |= systab64->stderr_handle;
@@ -427,7 +427,7 @@ static int __init efi_systab_init(void *phys) efi_systab.con_in_handle = systab32->con_in_handle; efi_systab.con_in = systab32->con_in; efi_systab.con_out_handle = systab32->con_out_handle; - efi_systab.con_out = systab32->con_out; + efi_systab.con_out = (void *)(unsigned long )systab32->con_out; efi_systab.stderr_handle = systab32->stderr_handle; efi_systab.stderr = systab32->stderr; efi_systab.runtime = (void *)(unsigned long )systab32->runtime;
arch/x86/xen/efi.c +1 -1
@@ -31,7 +31,7 @@ static efi_system_table_t efi_systab_xen __initdata = { .con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ - .con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ + .con_out = NULL, /* Not used under Xen. */ .stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
drivers/firmware/efi/libstub/efi-stub-helper.c +3 -2
@@ -413,12 +413,13 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,return status; } -static efi_status_t efi_file_read (void *handle,unsigned long *size,void *addr) +static efi_status_t efi_file_read (efi_file_handle_t *handle, +unsigned long *size,void *addr) {return efi_call_proto (efi_file_handle, read, handle, size, addr); } -static efi_status_t efi_file_close (void *handle) +static efi_status_t efi_file_close (efi_file_handle_t *handle) {return efi_call_proto (efi_file_handle, close, handle); }
drivers/firmware/efi/libstub/tpm.c +2 -2
@@ -69,11 +69,11 @@ void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table_arg)size_t log_size, last_entry_size;efi_bool_t truncated;int version =EFI_TCG2_EVENT_LOG_FORMAT_TCG_2 ; -void *tcg2_protocol =NULL ; +efi_tcg2_protocol_t *tcg2_protocol =NULL ;int final_events_size =0 ; status =efi_call_early (locate_protocol, &tcg2_guid,NULL , - &tcg2_protocol); + (void **)&tcg2_protocol);if (status !=EFI_SUCCESS )return ;
include/linux/efi.h +8 -4
@@ -382,7 +382,11 @@ union efi_pci_io_protocol {void *allocate_buffer;void *free_buffer;void *flush; -void *get_location; +efi_status_t (*get_location)(efi_pci_io_protocol_t *, +unsigned long *segment_nr, +unsigned long *bus_nr, +unsigned long *device_nr, +unsigned long *function_nr);void *attributes;void *get_bar_attributes;void *set_bar_attributes;
@@ -730,6 +734,8 @@ typedef struct {u32 tables; } efi_system_table_32_t; +typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t ; + typedef union { struct { efi_table_hdr_t hdr;
@@ -738,7 +744,7 @@ typedef union {unsigned long con_in_handle;unsigned long con_in;unsigned long con_out_handle; -unsigned long con_out; +efi_simple_text_output_protocol_t *con_out;unsigned long stderr_handle;unsigned long stderr;efi_runtime_services_t *runtime;
@@ -1337,8 +1343,6 @@ struct efivar_entry {bool deleting; }; -typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t ; -union efi_simple_text_output_protocol {struct {void *reset;
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 12/25 efi/libstub: annotate firmware routines as __efiapi
In reply to Ard BiesheuvelAnnotate all the firmware routines (boot services, runtime services and protocol methods) called in the boot context as __efiapi, and make it expand to __attribute__((ms_abi)) on 64-bit x86. This allows us to use the compiler to generate the calls into firmware that use the MS calling convention instead of the SysV one.
--- arch/x86/Kconfig | 11 +- arch/x86/boot/compressed/eboot.h | 4 +- drivers/firmware/efi/libstub/random.c | 10 +- include/linux/efi.h | 147 ++++++++++++++------------ 4 files changed, 96 insertions(+), 76 deletions(-)
arch/x86/Kconfig +6 -5
@@ -1991,11 +1991,12 @@ config EFI platforms. config EFI_STUB - bool "EFI stub support" - depends on EFI && !X86_USE_3DNOW - select RELOCATABLE - ---help--- - This kernel feature allows a bzImage to be loaded directly + bool "EFI stub support" + depends on EFI && !X86_USE_3DNOW + depends on $(cc-option,-mabi=ms) || X86_32 + select RELOCATABLE + ---help--- + This kernel feature allows a bzImage to be loaded directly by EFI firmware without the use of a bootloader. See Documentation/admin-guide/efi-stub.rst for more information.
arch/x86/boot/compressed/eboot.h +2 -2
@@ -16,8 +16,8 @@ typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;union efi_uga_draw_protocol {struct { -efi_status_t (*get_mode)(efi_uga_draw_protocol_t *, -u32 *,u32 *,u32 *,u32 *); + efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *, + u32*, u32*, u32*, u32*);void *set_mode;void *blt; };
drivers/firmware/efi/libstub/random.c +6 -4
@@ -13,10 +13,12 @@ typedef union efi_rng_protocol efi_rng_protocol_t;union efi_rng_protocol {struct { -efi_status_t (*get_info)(efi_rng_protocol_t *, -unsigned long *,efi_guid_t *); -efi_status_t (*get_rng)(efi_rng_protocol_t *, -efi_guid_t *,unsigned long ,u8 *out); + efi_status_t (__efiapi *get_info)(efi_rng_protocol_t *, + unsigned long *, + efi_guid_t *); + efi_status_t (__efiapi *get_rng)(efi_rng_protocol_t *, + efi_guid_t *, unsigned long, + u8 *out); };struct {u32 get_info;
include/linux/efi.h +82 -65
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Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 13/25 efi/libstub/x86: avoid thunking for native firmware calls
In reply to Ard BiesheuvelWe use special wrapper routines to invoke firmware services in the native case as well as the mixed mode case. For mixed mode, the need is obvious, but for the native cases, we can simply rely on the compiler to generate the indirect call, given that GCC now has support for the MS calling convention (and has had it for quite some time now). Note that on i386, the decompressor and the EFI stub are not built with -mregparm=3 like the rest of the i386 kernel, so we can safely allow the compiler to emit the indirect calls here as well.
So drop all the wrappers and indirection, and switch to either native calls, or direct calls into the thunk routine for mixed mode.
--- arch/x86/boot/compressed/Makefile | 2 +- arch/x86/boot/compressed/eboot.c | 3 +- arch/x86/boot/compressed/efi_stub_32.S | 87 -------------------------- arch/x86/boot/compressed/efi_stub_64.S | 5 -- arch/x86/boot/compressed/head_32.S | 6 -- arch/x86/boot/compressed/head_64.S | 23 +------ arch/x86/include/asm/efi.h | 34 +++++----- arch/x86/platform/efi/efi_64.c | 2 - 8 files changed, 24 insertions(+), 138 deletions(-) delete mode 100644 arch/x86/boot/compressed/efi_stub_32.S delete mode 100644 arch/x86/boot/compressed/efi_stub_64.S
arch/x86/boot/compressed/Makefile +1 -1
@@ -89,7 +89,7 @@ vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o $(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone -vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o \ +vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o \ $(objtree)/drivers/firmware/efi/libstub/lib.a vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o
arch/x86/boot/compressed/eboot.c +2 -1
@@ -44,7 +44,8 @@ BOOT_SERVICES(64);void efi_char16_printk (efi_system_table_t *table,efi_char16_t *str) {efi_call_proto (efi_simple_text_output_protocol, output_string, - efi_early->text_output, str); + ((efi_simple_text_output_protocol_t *)(unsigned long ) + efi_early->text_output), str); } static efi_status_t
arch/x86/boot/compressed/efi_stub_32.S deleted +0 -87
87 lines not on this page · raw message
arch/x86/boot/compressed/efi_stub_64.S deleted +0 -5
@@ -1,5 +0,0 @@ -#include <asm/segment.h> -#include <asm/msr.h> -#include <asm/processor-flags.h> - -#include "../../platform/efi/efi_stub_64.S"
arch/x86/boot/compressed/head_32.S +0 -6
@@ -161,9 +161,7 @@ SYM_FUNC_START(efi_pe_entry) popl %ecx movl %ecx, efi32_config+8(%esi) /* EFI System table pointer */ - /* Relocate efi_config->call() */ leal efi32_config(%esi), %eax - add %esi, 40(%eax) pushl %eax call make_boot_params
@@ -188,9 +186,7 @@ SYM_FUNC_START(efi32_stub_entry) movl %ecx, efi32_config(%esi) /* Handle */ movl %edx, efi32_config+8(%esi) /* EFI System table pointer */ - /* Relocate efi_config->call() */ leal efi32_config(%esi), %eax - add %esi, 40(%eax) pushl %eax 2: call efi_main
@@ -266,8 +262,6 @@ SYM_FUNC_END(.Lrelocated) .data efi32_config: .fill 5,8,0 - .long efi_call_phys - .long 0 .byte 0 #endif
arch/x86/boot/compressed/head_64.S +1 -22
@@ -459,15 +459,6 @@ SYM_FUNC_START(efi_pe_entry) leaq efi64_config(%rip), %rax movq %rax, efi_config(%rip) - call 1f -1: popq %rbp - subq $1b, %rbp - - /* - * Relocate efi_config->call(). - */ - addq %rbp, efi64_config+40(%rip) - movq %rax, %rdi call make_boot_params cmpq $0,%rax
@@ -475,20 +466,10 @@ SYM_FUNC_START(efi_pe_entry) mov %rax, %rsi leaq startup_32(%rip), %rax movl %eax, BP_code32_start(%rsi) - jmp 2f /* Skip the relocation */ handover_entry: - call 1f -1: popq %rbp - subq $1b, %rbp - - /* - * Relocate efi_config->call(). - */ - movq efi_config(%rip), %rax - addq %rbp, 40(%rax) -2: movq efi_config(%rip), %rdi + and $~0xf, %rsp /* realign the stack */ call efi_main movq %rax,%rsi cmpq $0,%rax
@@ -688,14 +669,12 @@ SYM_DATA_LOCAL(efi_config, .quad 0) #ifdef CONFIG_EFI_MIXED SYM_DATA_START(efi32_config) .fill 5,8,0 - .quad efi64_thunk .byte 0 SYM_DATA_END(efi32_config) #endif SYM_DATA_START(efi64_config) .fill 5,8,0 - .quad efi_call .byte 1 SYM_DATA_END(efi64_config) #endif /* CONFIG_EFI_STUB */
arch/x86/include/asm/efi.h +20 -14
@@ -152,6 +152,7 @@ struct efi_setup_data {extern u64 efi_setup;#ifdef CONFIG_EFI +extern efi_status_t efi64_thunk (u32 , ...);static inline bool efi_is_mixed (void ) {
@@ -205,7 +206,6 @@ struct efi_config {u64 runtime_services;u64 boot_services;u64 text_output; -efi_status_t (*call)(unsigned long , ...);bool is64; } __packed;
@@ -235,30 +235,36 @@ static inline bool efi_is_native(void) (unsigned long)(attr), (attr))#define efi_table_attr (table, attr, instance) ({ \ - __typeof__(((table##_t *)0)->attr) __ret; \ + __typeof__(instance->attr) __ret; \ if (efi_is_native()) { \ - __ret = ((table##_t *)(unsigned long)instance)->attr; \ + __ret = instance->attr; \ } else { \ - __ret = (__typeof__(__ret))efi_mixed_mode_cast( \ - ((table##_t *)(unsigned long)instance)->mixed_mode.attr);\ + __ret = (__typeof__(__ret)) \ + efi_mixed_mode_cast(instance->mixed_mode.attr); \ } \ __ret; \ })#define efi_call_proto (protocol, f, instance, ...) \ - __efi_early()->call((unsigned long) \ - efi_table_attr(protocol, f, instance), \ - instance, ##__VA_ARGS__) + (efi_is_native() \ + ? instance->f(instance, ##__VA_ARGS__) \ + : efi64_thunk(instance->mixed_mode.f, instance, ##__VA_ARGS__))#define efi_call_early (f, ...) \ - __efi_early()->call((unsigned long) \ - efi_table_attr(efi_boot_services, f, \ - __efi_early()->boot_services), __VA_ARGS__) + (efi_is_native() \ + ? ((efi_boot_services_t *)(unsigned long) \ + __efi_early()->boot_services)->f(__VA_ARGS__) \ + : efi64_thunk(((efi_boot_services_t *)(unsigned long) \ + __efi_early()->boot_services)->mixed_mode.f, \ + __VA_ARGS__))#define efi_call_runtime (f, ...) \ - __efi_early()->call((unsigned long) \ - efi_table_attr(efi_runtime_services, f, \ - __efi_early()->runtime_services), __VA_ARGS__) + (efi_is_native() \ + ? ((efi_runtime_services_t *)(unsigned long) \ + __efi_early()->runtime_services)->f(__VA_ARGS__)\ + : efi64_thunk(((efi_runtime_services_t *)(unsigned long)\ + __efi_early()->runtime_services)->mixed_mode.f, \ + __VA_ARGS__))extern bool efi_reboot_required (void );extern bool efi_is_table_address (unsigned long phys_addr);
arch/x86/platform/efi/efi_64.c +0 -2
@@ -635,8 +635,6 @@ void efi_switch_mm(struct mm_struct *mm) }#ifdef CONFIG_EFI_MIXED -extern efi_status_t efi64_thunk (u32 , ...); -static DEFINE_SPINLOCK (efi_runtime_lock);#define runtime_service32 (func) \
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 14/25 efi/libstub: avoid protocol wrapper for file I/O routines
In reply to Ard BiesheuvelThe EFI file I/O routines built on top of the file I/O firmware services are incompatible with mixed mode, so there is no need to obfuscate them by using protocol wrappers whose only purpose is to hide the mixed mode handling. So let's switch to plain indirect calls instead.
This also means we can drop the mixed_mode aliases from the various types involved.
--- .../firmware/efi/libstub/efi-stub-helper.c | 17 ++- include/linux/efi.h | 118 ++++++------------ 2 files changed, 46 insertions(+), 89 deletions(-)
drivers/firmware/efi/libstub/efi-stub-helper.c +7 -10
@@ -370,8 +370,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,efi_guid_t info_guid =EFI_FILE_INFO_ID ;unsigned long info_sz; - status =efi_call_proto (efi_file_handle, open, fh, &h, filename_16, -EFI_FILE_MODE_READ , (u64 )0 ); + status = fh->open (fh, &h, filename_16,EFI_FILE_MODE_READ ,0 );if (status !=EFI_SUCCESS ) {efi_printk (sys_table_arg,"Failed to open file: " );efi_char16_printk (sys_table_arg, filename_16);
@@ -382,8 +381,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh, *handle = h; info_sz =0 ; - status =efi_call_proto (efi_file_handle, get_info, h, &info_guid, - &info_sz,NULL ); + status = h->get_info (h, &info_guid, &info_sz,NULL );if (status !=EFI_BUFFER_TOO_SMALL ) {efi_printk (sys_table_arg,"Failed to get file info size\n" );return status;
@@ -397,8 +395,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,return status; } - status =efi_call_proto (efi_file_handle, get_info, h, &info_guid, - &info_sz, info); + status = h->get_info (h, &info_guid, &info_sz, info);if (status ==EFI_BUFFER_TOO_SMALL ) {efi_call_early (free_pool, info); goto grow;
@@ -416,12 +413,12 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,static efi_status_t efi_file_read (efi_file_handle_t *handle,unsigned long *size,void *addr) { -return efi_call_proto (efi_file_handle, read, handle, size, addr); +return handle->read (handle, size, addr); }static efi_status_t efi_file_close (efi_file_handle_t *handle) { -return efi_call_proto (efi_file_handle, close, handle); +return handle->close (handle); } static efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg,
@@ -432,7 +429,7 @@ static efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg,efi_file_handle_t *fh;efi_guid_t fs_proto =EFI_FILE_SYSTEM_GUID ;efi_status_t status; -void *handle =efi_table_attr (efi_loaded_image, device_handle, image); +efi_handle_t handle = image->device_handle; status =efi_call_early (handle_protocol, handle, &fs_proto, (void **)&io);
@@ -441,7 +438,7 @@ static efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg,return status; } - status =efi_call_proto (efi_file_io_interface, open_volume, io, &fh); + status = io->open_volume (io, &fh);if (status !=EFI_SUCCESS )efi_printk (sys_table_arg,"Failed to open volume\n" );else
include/linux/efi.h +39 -79
133 lines not on this page · raw message
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 15/25 efi/libstub: get rid of 'sys_table_arg' macro parameter
In reply to Ard BiesheuvelThe efi_call macros on ARM have a dependency on a variable 'sys_table_arg' existing in the scope of the macro instantiation. Since this variable always points to the same data structure, let's create a global getter for it and use that instead.
Note that the use of a global variable with external linkage is avoided, given the problems we had in the past with early processing of the GOT tables.
While at it, drop the redundant casts in the efi_table_attr and efi_call_proto macros.
--- arch/arm/include/asm/efi.h | 8 ++++---- arch/arm64/include/asm/efi.h | 8 ++++---- arch/x86/boot/compressed/eboot.c | 5 +++++ drivers/firmware/efi/libstub/arm-stub.c | 11 ++++++++++- drivers/firmware/efi/libstub/efistub.h | 2 ++ drivers/firmware/efi/libstub/gop.c | 2 ++ 6 files changed, 27 insertions(+), 9 deletions(-)
arch/arm/include/asm/efi.h +4 -4
@@ -50,15 +50,15 @@ void efi_virtmap_unload(void);/* arch specific definitions used by the stub code */ -#define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__) -#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__) +#define efi_call_early (f, ...) efi_system_table()->boottime->f(__VA_ARGS__) +#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__)#define efi_is_native () (true)#define efi_table_attr (table, attr, instance) \ - ((table##_t *)instance)->attr + instance->attr#define efi_call_proto (protocol, f, instance, ...) \ - ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + instance->f(instance, ##__VA_ARGS__)struct screen_info *alloc_screen_info (efi_system_table_t *sys_table_arg);void free_screen_info (efi_system_table_t *sys_table,struct screen_info *si);
arch/arm64/include/asm/efi.h +4 -4
@@ -93,15 +93,15 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,return (image_addr & ~(SZ_1G -1UL )) + (1UL << (VA_BITS_MIN -1 )); } -#define efi_call_early (f, ...) sys_table_arg->boottime->f(__VA_ARGS__) -#define efi_call_runtime (f, ...) sys_table_arg->runtime->f(__VA_ARGS__) +#define efi_call_early (f, ...) efi_system_table()->boottime->f(__VA_ARGS__) +#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__)#define efi_is_native () (true)#define efi_table_attr (table, attr, instance) \ - ((table##_t *)instance)->attr + instance->attr#define efi_call_proto (protocol, f, instance, ...) \ - ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + instance->f(instance, ##__VA_ARGS__) #define alloc_screen_info(x...) &screen_info
arch/x86/boot/compressed/eboot.c +5 -0
@@ -27,6 +27,11 @@ __pure const struct efi_config *__efi_early(void)return efi_early; } +__pure efi_system_table_t *efi_system_table (void ) +{ +return sys_table; +} +#define BOOT_SERVICES (bits) \ static void setup_boot_services##bits(struct efi_config *c) \ { \
drivers/firmware/efi/libstub/arm-stub.c +10 -1
@@ -37,6 +37,13 @@static u64 virtmap_base =EFI_RT_VIRTUAL_BASE ; +static efi_system_table_t *__section(.data) sys_table; + +__pure efi_system_table_t *efi_system_table (void ) +{ +return sys_table; +} +void efi_char16_printk (efi_system_table_t *sys_table_arg,efi_char16_t *str) {
@@ -110,7 +117,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table,* for both archictectures, with the arch-specific code provided in the * handle_kernel_image() function. */ -unsigned long efi_entry (void *handle,efi_system_table_t *sys_table, +unsigned long efi_entry (void *handle,efi_system_table_t *sys_table_arg,unsigned long *image_addr) {efi_loaded_image_t *image;
@@ -131,6 +138,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,enum efi_secureboot_mode secure_boot;struct screen_info *si; + sys_table = sys_table_arg; +/* Check if we were booted by the EFI firmware */ if (sys_table->hdr.signature !=EFI_SYSTEM_TABLE_SIGNATURE ) goto fail;
drivers/firmware/efi/libstub/efistub.h +2 -0
@@ -29,6 +29,8 @@ extern int __pure nokaslr(void);extern int __pure is_quiet (void );extern int __pure novamap (void ); +extern __pure efi_system_table_t *efi_system_table (void ); +#define pr_efi (sys_table, msg) do { \ if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \ } while (0)
drivers/firmware/efi/libstub/gop.c +2 -0
@@ -10,6 +10,8 @@#include <asm/efi.h> #include <asm/setup.h> +#include "efistub.h" +static void find_bits (unsigned long mask,u8 *pos,u8 *size) {u8 first, len;
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 16/25 efi/libstub: unify the efi_char16_printk implementations
In reply to Ard BiesheuvelUse a single implementation for efi_char16_printk() across all architectures.
--- arch/x86/boot/compressed/eboot.c | 7 ------- drivers/firmware/efi/libstub/arm-stub.c | 9 --------- drivers/firmware/efi/libstub/efi-stub-helper.c | 9 +++++++++ 3 files changed, 9 insertions(+), 16 deletions(-)
arch/x86/boot/compressed/eboot.c +0 -7
@@ -46,13 +46,6 @@ static void setup_boot_services##bits(struct efi_config *c) \BOOT_SERVICES (32 );BOOT_SERVICES (64 ); -void efi_char16_printk (efi_system_table_t *table,efi_char16_t *str) -{ -efi_call_proto (efi_simple_text_output_protocol, output_string, - ((efi_simple_text_output_protocol_t *)(unsigned long ) - efi_early->text_output), str); -} -static efi_status_t preserve_pci_rom_image (efi_pci_io_protocol_t *pci,struct pci_setup_rom **__rom) {
drivers/firmware/efi/libstub/arm-stub.c +0 -9
@@ -44,15 +44,6 @@ __pure efi_system_table_t *efi_system_table(void)return sys_table; } -void efi_char16_printk (efi_system_table_t *sys_table_arg, -efi_char16_t *str) -{ -efi_simple_text_output_protocol_t *out; - - out = (efi_simple_text_output_protocol_t *)sys_table_arg->con_out; - out->output_string (out, str); -} -static struct screen_info *setup_graphics (efi_system_table_t *sys_table_arg) {efi_guid_t gop_proto =EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID ;
drivers/firmware/efi/libstub/efi-stub-helper.c +9 -0
@@ -955,3 +955,12 @@ void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid) }return NULL ; } + +void efi_char16_printk (efi_system_table_t *table,efi_char16_t *str) +{ +efi_call_proto (efi_simple_text_output_protocol, + output_string, +efi_table_attr (efi_system_table, con_out, +efi_system_table ()), + str); +}
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 17/25 efi/libstub/x86: drop __efi_early() export and efi_config struct
In reply to Ard BiesheuvelThe various pointers we stash in the efi_config struct which we retrieve using __efi_early() are simply copies of the ones in the EFI system table, which we have started accessing directly in the previous patch. So drop all the __efi_early() related plumbing, as well as all the assembly code dealing with efi_config, which allows us to move the PE/COFF entry point to C code as well.
--- arch/x86/boot/compressed/eboot.c | 82 +++++++++++------------------- arch/x86/boot/compressed/head_32.S | 58 +-------------------- arch/x86/boot/compressed/head_64.S | 74 +++++---------------------- arch/x86/include/asm/efi.h | 38 ++++---------- 4 files changed, 54 insertions(+), 198 deletions(-)
arch/x86/boot/compressed/eboot.c +30 -52
@@ -19,32 +19,17 @@#include "eboot.h" static efi_system_table_t *sys_table; - -static struct efi_config *efi_early; - -__pure const struct efi_config *__efi_early (void ) -{ -return efi_early; -} +static bool efi_is64 =IS_ENABLED (CONFIG_X86_64 );__pure efi_system_table_t *efi_system_table (void ) {return sys_table; } -#define BOOT_SERVICES (bits) \ -static void setup_boot_services##bits(struct efi_config *c) \ -{ \ - efi_system_table_##bits##_t *table; \ - \ - table = (typeof(table))sys_table; \ - \ - c->runtime_services = table->runtime; \ - c->boot_services = table->boottime; \ - c->text_output = table->con_out; \ +__pure bool efi_is_64bit (void ) +{ +return efi_is64; } -BOOT_SERVICES (32 ); -BOOT_SERVICES (64 );static efi_status_t preserve_pci_rom_image (efi_pci_io_protocol_t *pci,struct pci_setup_rom **__rom)
@@ -367,21 +352,24 @@ void setup_graphics(struct boot_params *boot_params) } } +void startup_32 (struct boot_params *boot_params); + +void __noreturn efi_stub_entry (efi_handle_t handle, +efi_system_table_t *sys_table_arg, +struct boot_params *boot_params); +/* * Because the x86 boot code expects to be passed a boot_params we * need to create one ourselves (usually the bootloader would create * one for us). -* -* The caller is responsible for filling out ->code32_start in the -* returned boot_params. */ -struct boot_params *make_boot_params (struct efi_config *c) +efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, +efi_system_table_t *sys_table_arg) {struct boot_params *boot_params;struct apm_bios_info *bi;struct setup_header *hdr;efi_loaded_image_t *image; -void *handle;efi_guid_t proto =LOADED_IMAGE_PROTOCOL_GUID ;int options_size =0 ;efi_status_t status;
@@ -389,31 +377,24 @@ struct boot_params *make_boot_params(struct efi_config *c)unsigned long ramdisk_addr;unsigned long ramdisk_size; - efi_early = c; - sys_table = (efi_system_table_t *)(unsigned long )efi_early->table; - handle = (void *)(unsigned long )efi_early->image_handle; + sys_table = sys_table_arg;/* Check if we were booted by the EFI firmware */ if (sys_table->hdr.signature !=EFI_SYSTEM_TABLE_SIGNATURE ) -return NULL ; - -if (efi_is_64bit ()) -setup_boot_services64 (efi_early); -else -setup_boot_services32 (efi_early); +return EFI_INVALID_PARAMETER ; status =efi_call_early (handle_protocol, handle, &proto, (void *)&image);if (status !=EFI_SUCCESS ) {efi_printk (sys_table,"Failed to get handle for LOADED_IMAGE_PROTOCOL\n" ); -return NULL ; +return status; } status =efi_low_alloc (sys_table,0x4000 ,1 , (unsigned long *)&boot_params);if (status !=EFI_SUCCESS ) {efi_printk (sys_table,"Failed to allocate lowmem for boot params\n" ); -return NULL ; +return status; }memset (boot_params,0x0 ,0x4000 );
@@ -474,14 +455,17 @@ struct boot_params *make_boot_params(struct efi_config *c) boot_params->ext_ramdisk_image = (u64 )ramdisk_addr >>32 ; boot_params->ext_ramdisk_size = (u64 )ramdisk_size >>32 ; -return boot_params; + hdr->code32_start = (u32 )(unsigned long )startup_32; + +efi_stub_entry (handle, sys_table, boot_params); +/* not reached */ fail2:efi_free (sys_table, options_size, hdr->cmd_line_ptr); fail:efi_free (sys_table,0x4000 , (unsigned long )boot_params); -return NULL ; +return status; } static void add_e820ext(struct boot_params *params,
@@ -737,33 +721,26 @@ static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)* On success we return a pointer to a boot_params structure, and NULL * on failure. */ -struct boot_params * -efi_main (struct efi_config *c,struct boot_params *boot_params) +struct boot_params *efi_main (efi_handle_t handle, +efi_system_table_t *sys_table_arg, +struct boot_params *boot_params, +bool is64) {struct desc_ptr *gdt =NULL ;struct setup_header *hdr = &boot_params->hdr;efi_status_t status;struct desc_struct *desc; -void *handle; -efi_system_table_t *_table;unsigned long cmdline_paddr; - efi_early = c; - - _table = (efi_system_table_t *)(unsigned long )efi_early->table; - handle = (void *)(unsigned long )efi_early->image_handle; + sys_table = sys_table_arg; - sys_table = _table; +if (IS_ENABLED (CONFIG_EFI_MIXED )) + efi_is64 = is64;/* Check if we were booted by the EFI firmware */ if (sys_table->hdr.signature !=EFI_SYSTEM_TABLE_SIGNATURE ) goto fail; -if (efi_is_64bit ()) -setup_boot_services64 (efi_early); -else -setup_boot_services32 (efi_early); -/* * make_boot_params() may have been called before efi_main(), in which * case this is the second time we parse the cmdline. This is ok,
@@ -925,5 +902,6 @@ efi_main(struct efi_config *c, struct boot_params *boot_params) fail:efi_printk (sys_table,"efi_main() failed!\n" ); -return NULL ; +for (;;) + asm("hlt" ); }
arch/x86/boot/compressed/head_32.S +2 -56
78 lines not on this page · raw message
arch/x86/boot/compressed/head_64.S +13 -61
118 lines not on this page · raw message
arch/x86/include/asm/efi.h +9 -29
@@ -200,32 +200,14 @@ static inline efi_status_t efi_thunk_set_virtual_address_map(/* arch specific definitions used by the stub code */ -struct efi_config { -u64 image_handle; -u64 table; -u64 runtime_services; -u64 boot_services; -u64 text_output; -bool is64; -} __packed; - -__pure const struct efi_config *__efi_early (void ); - -static inline bool efi_is_64bit (void ) -{ -if (!IS_ENABLED (CONFIG_X86_64 )) -return false; - -if (!IS_ENABLED (CONFIG_EFI_MIXED )) -return true; - -return __efi_early ()->is64; -} +__pure bool efi_is_64bit (void );static inline bool efi_is_native (void ) {if (!IS_ENABLED (CONFIG_X86_64 ))return true; +if (!IS_ENABLED (CONFIG_EFI_MIXED )) +return true;return efi_is_64bit (); }
@@ -252,18 +234,16 @@ static inline bool efi_is_native(void)#define efi_call_early (f, ...) \ (efi_is_native() \ - ? ((efi_boot_services_t *)(unsigned long) \ - __efi_early()->boot_services)->f(__VA_ARGS__) \ - : efi64_thunk(((efi_boot_services_t *)(unsigned long) \ - __efi_early()->boot_services)->mixed_mode.f, \ + ? efi_system_table()->boottime->f(__VA_ARGS__) \ + : efi64_thunk(efi_table_attr(efi_boot_services, \ + boottime, efi_system_table())->mixed_mode.f, \ __VA_ARGS__))#define efi_call_runtime (f, ...) \ (efi_is_native() \ - ? ((efi_runtime_services_t *)(unsigned long) \ - __efi_early()->runtime_services)->f(__VA_ARGS__)\ - : efi64_thunk(((efi_runtime_services_t *)(unsigned long)\ - __efi_early()->runtime_services)->mixed_mode.f, \ + ? efi_system_table()->runtime->f(__VA_ARGS__) \ + : efi64_thunk(efi_table_attr(efi_runtime_services, \ + runtime, efi_system_table())->mixed_mode.f, \ __VA_ARGS__))extern bool efi_reboot_required (void );
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 18/25 efi/libstub: drop sys_table_arg from printk routines
In reply to Ard BiesheuvelAs a first step towards getting rid of the need to pass around a function parameter 'sys_table_arg' pointing to the EFI system table, remove the references to it in the printing code, which is represents the majority of the use cases.
--- arch/x86/boot/compressed/eboot.c | 28 +++++++-------- drivers/firmware/efi/libstub/arm-stub.c | 28 +++++++-------- drivers/firmware/efi/libstub/arm32-stub.c | 14 ++++---- drivers/firmware/efi/libstub/arm64-stub.c | 12 +++---- .../firmware/efi/libstub/efi-stub-helper.c | 34 +++++++++---------- drivers/firmware/efi/libstub/efistub.h | 9 ++--- drivers/firmware/efi/libstub/fdt.c | 16 ++++----- drivers/firmware/efi/libstub/secureboot.c | 4 +-- drivers/firmware/efi/libstub/tpm.c | 3 +- include/linux/efi.h | 2 +- 10 files changed, 74 insertions(+), 76 deletions(-)
arch/x86/boot/compressed/eboot.c +14 -14
@@ -57,7 +57,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) status =efi_call_early (allocate_pool,EFI_LOADER_DATA , size, (void **)&rom);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate memory for 'rom'\n" ); +efi_printk ("Failed to allocate memory for 'rom'\n" );return status; }
@@ -74,7 +74,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) &rom->vendor);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to read rom->vendor\n" ); +efi_printk ("Failed to read rom->vendor\n" ); goto free_struct; }
@@ -83,7 +83,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) &rom->devid);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to read rom->devid\n" ); +efi_printk ("Failed to read rom->devid\n" ); goto free_struct; }
@@ -132,7 +132,7 @@ static void setup_efi_pci(struct boot_params *params) size, (void **)&pci_handle);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate memory for 'pci_handle'\n" ); +efi_printk ("Failed to allocate memory for 'pci_handle'\n" );return ; }
@@ -187,7 +187,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)return ;if (efi_table_attr (apple_properties_protocol, version, p) !=0x10000 ) { -efi_printk (sys_table,"Unsupported properties proto version\n" ); +efi_printk ("Unsupported properties proto version\n" );return ; }
@@ -200,7 +200,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params) size +sizeof (struct setup_data ), (void **)&new);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate memory for 'properties'\n" ); +efi_printk ("Failed to allocate memory for 'properties'\n" );return ; }
@@ -386,14 +386,14 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, status =efi_call_early (handle_protocol, handle, &proto, (void *)&image);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to get handle for LOADED_IMAGE_PROTOCOL\n" ); +efi_printk ("Failed to get handle for LOADED_IMAGE_PROTOCOL\n" );return status; } status =efi_low_alloc (sys_table,0x4000 ,1 , (unsigned long *)&boot_params);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate lowmem for boot params\n" ); +efi_printk ("Failed to allocate lowmem for boot params\n" );return status; }
@@ -441,7 +441,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,if (status !=EFI_SUCCESS && hdr->xloadflags &XLF_CAN_BE_LOADED_ABOVE_4G ) { -efi_printk (sys_table,"Trying to load files to higher address\n" ); +efi_printk ("Trying to load files to higher address\n" ); status = handle_cmdline_files(sys_table, image, (char *)(unsigned long)hdr->cmd_line_ptr, "initrd=", -1UL,
@@ -773,7 +773,7 @@ struct boot_params *efi_main(efi_handle_t handle, status =efi_call_early (allocate_pool,EFI_LOADER_DATA ,sizeof (*gdt), (void **)&gdt);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate memory for 'gdt' structure\n" ); +efi_printk ("Failed to allocate memory for 'gdt' structure\n" ); goto fail; }
@@ -781,7 +781,7 @@ struct boot_params *efi_main(efi_handle_t handle, status =efi_low_alloc (sys_table, gdt->size,8 , (unsigned long *)&gdt->address);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"Failed to allocate memory for 'gdt'\n" ); +efi_printk ("Failed to allocate memory for 'gdt'\n" ); goto fail; }
@@ -797,7 +797,7 @@ struct boot_params *efi_main(efi_handle_t handle, hdr->kernel_alignment, LOAD_PHYSICAL_ADDR);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"efi_relocate_kernel() failed!\n" ); +efi_printk ("efi_relocate_kernel() failed!\n" ); goto fail; }
@@ -807,7 +807,7 @@ struct boot_params *efi_main(efi_handle_t handle, status =exit_boot (boot_params, handle);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table,"exit_boot() failed!\n" ); +efi_printk ("exit_boot() failed!\n" ); goto fail; }
@@ -900,7 +900,7 @@ struct boot_params *efi_main(efi_handle_t handle,return boot_params; fail: -efi_printk (sys_table,"efi_main() failed!\n" ); +efi_printk ("efi_main() failed!\n" );for (;;) asm("hlt" );
drivers/firmware/efi/libstub/arm-stub.c +14 -14
@@ -73,7 +73,7 @@ void install_memreserve_table(efi_system_table_t *sys_table_arg) status =efi_call_early (allocate_pool,EFI_LOADER_DATA ,sizeof (*rsv), (void **)&rsv);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to allocate memreserve entry!\n" ); +pr_efi_err ("Failed to allocate memreserve entry!\n" );return ; }
@@ -85,7 +85,7 @@ void install_memreserve_table(efi_system_table_t *sys_table_arg) &memreserve_table_guid, rsv);if (status !=EFI_SUCCESS ) -pr_efi_err (sys_table_arg,"Failed to install memreserve config table!\n" ); +pr_efi_err ("Failed to install memreserve config table!\n" ); }
@@ -147,13 +147,13 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg, status = sys_table->boottime->handle_protocol (handle, &loaded_image_proto, (void *)&image);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Failed to get loaded image protocol\n" ); +pr_efi_err ("Failed to get loaded image protocol\n" ); goto fail; } dram_base =get_dram_base (sys_table);if (dram_base ==EFI_ERROR ) { -pr_efi_err (sys_table,"Failed to find DRAM base\n" ); +pr_efi_err ("Failed to find DRAM base\n" ); goto fail; }
@@ -164,7 +164,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg,*/ cmdline_ptr =efi_convert_cmdline (sys_table, image, &cmdline_size);if (!cmdline_ptr) { -pr_efi_err (sys_table,"getting command line via LOADED_IMAGE_PROTOCOL\n" ); +pr_efi_err ("getting command line via LOADED_IMAGE_PROTOCOL\n" ); goto fail; }
@@ -176,7 +176,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg,if (!IS_ENABLED (CONFIG_CMDLINE_FORCE ) && cmdline_size >0 )efi_parse_options (cmdline_ptr); -pr_efi (sys_table,"Booting Linux Kernel...\n" ); +pr_efi ("Booting Linux Kernel...\n" ); si =setup_graphics (sys_table);
@@ -185,7 +185,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg, &reserve_size, dram_base, image);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Failed to relocate kernel\n" ); +pr_efi_err ("Failed to relocate kernel\n" ); goto fail_free_cmdline; }
@@ -204,29 +204,29 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg,if (!IS_ENABLED (CONFIG_EFI_ARMSTUB_DTB_LOADER ) || secure_boot != efi_secureboot_mode_disabled) {if (strstr (cmdline_ptr,"dtb=" )) -pr_efi (sys_table,"Ignoring DTB from command line.\n" ); +pr_efi ("Ignoring DTB from command line.\n" ); }else { status =handle_cmdline_files (sys_table, image, cmdline_ptr,"dtb=" , ~0UL , &fdt_addr, &fdt_size);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Failed to load device tree!\n" ); +pr_efi_err ("Failed to load device tree!\n" ); goto fail_free_image; } }if (fdt_addr) { -pr_efi (sys_table,"Using DTB from command line\n" ); +pr_efi ("Using DTB from command line\n" ); }else {/* Look for a device tree configuration table entry. */ fdt_addr = (uintptr_t )get_fdt (sys_table, &fdt_size);if (fdt_addr) -pr_efi (sys_table,"Using DTB from configuration table\n" ); +pr_efi ("Using DTB from configuration table\n" ); }if (!fdt_addr) -pr_efi (sys_table,"Generating empty DTB\n" ); +pr_efi ("Generating empty DTB\n" ); status = handle_cmdline_files(sys_table, image, cmdline_ptr, "initrd=", efi_get_max_initrd_addr(dram_base,
@@ -234,7 +234,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg, (unsigned long *)&initrd_addr, (unsigned long *)&initrd_size);if (status !=EFI_SUCCESS ) -pr_efi_err (sys_table,"Failed initrd from command line!\n" ); +pr_efi_err ("Failed initrd from command line!\n" );efi_random_get_seed (sys_table);
@@ -275,7 +275,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table_arg,if (status ==EFI_SUCCESS )return new_fdt_addr; -pr_efi_err (sys_table,"Failed to update FDT and exit boot services\n" ); +pr_efi_err ("Failed to update FDT and exit boot services\n" );efi_free (sys_table, initrd_size, initrd_addr);efi_free (sys_table, fdt_size, fdt_addr);
drivers/firmware/efi/libstub/arm32-stub.c +6 -8
@@ -18,7 +18,7 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg)/* LPAE kernels need compatible hardware */ block =cpuid_feature_extract (CPUID_EXT_MMFR0 ,0 );if (block <5 ) { -pr_efi_err (sys_table_arg,"This LPAE kernel is not supported by your CPU\n" ); +pr_efi_err ("This LPAE kernel is not supported by your CPU\n" );return EFI_UNSUPPORTED ; }return EFI_SUCCESS ;
@@ -121,8 +121,7 @@ static efi_status_t reserve_kernel_base(efi_system_table_t *sys_table_arg,*/ status =efi_get_memory_map (sys_table_arg, &map);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg, -"reserve_kernel_base(): Unable to retrieve memory map.\n" ); +pr_efi_err ("reserve_kernel_base(): Unable to retrieve memory map.\n" );return status; }
@@ -164,8 +163,7 @@ static efi_status_t reserve_kernel_base(efi_system_table_t *sys_table_arg, (end - start) /EFI_PAGE_SIZE , &start);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg, -"reserve_kernel_base(): alloc failed.\n" ); +pr_efi_err ("reserve_kernel_base(): alloc failed.\n" ); goto out; }break ;
@@ -224,7 +222,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table, status =reserve_kernel_base (sys_table, kernel_base, reserve_addr, reserve_size);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Unable to allocate memory for uncompressed kernel.\n" ); +pr_efi_err ("Unable to allocate memory for uncompressed kernel.\n" );return status; }
@@ -237,7 +235,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table, *image_size, kernel_base + MAX_UNCOMP_KERNEL_SIZE, 0, 0);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Failed to relocate kernel.\n" ); +pr_efi_err ("Failed to relocate kernel.\n" );efi_free (sys_table, *reserve_size, *reserve_addr); *reserve_size =0 ;return status;
@@ -249,7 +247,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table,* address at which the zImage is loaded. */ if (*image_addr + *image_size > dram_base +ZIMAGE_OFFSET_LIMIT ) { -pr_efi_err (sys_table,"Failed to relocate kernel, no low memory available.\n" ); +pr_efi_err ("Failed to relocate kernel, no low memory available.\n" );efi_free (sys_table, *reserve_size, *reserve_addr); *reserve_size =0 ;efi_free (sys_table, *image_size, *image_addr);
drivers/firmware/efi/libstub/arm64-stub.c +6 -6
@@ -32,9 +32,9 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg) tg = (read_cpuid (ID_AA64MMFR0_EL1 ) >>ID_AA64MMFR0_TGRAN_SHIFT ) &0xf ;if (tg !=ID_AA64MMFR0_TGRAN_SUPPORTED ) {if (IS_ENABLED (CONFIG_ARM64_64K_PAGES )) -pr_efi_err (sys_table_arg,"This 64 KB granular kernel is not supported by your CPU\n" ); +pr_efi_err ("This 64 KB granular kernel is not supported by your CPU\n" );else -pr_efi_err (sys_table_arg,"This 16 KB granular kernel is not supported by your CPU\n" ); +pr_efi_err ("This 16 KB granular kernel is not supported by your CPU\n" );return EFI_UNSUPPORTED ; }return EFI_SUCCESS ;
@@ -60,13 +60,13 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg,sizeof (phys_seed), (u8 *)&phys_seed);if (status ==EFI_NOT_FOUND ) { -pr_efi (sys_table_arg,"EFI_RNG_PROTOCOL unavailable, no randomness supplied\n" ); +pr_efi ("EFI_RNG_PROTOCOL unavailable, no randomness supplied\n" ); }else if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"efi_get_random_bytes() failed\n" ); +pr_efi_err ("efi_get_random_bytes() failed\n" );return status; } }else { -pr_efi (sys_table_arg,"KASLR disabled on kernel command line\n" ); +pr_efi ("KASLR disabled on kernel command line\n" ); } }
@@ -143,7 +143,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg, MIN_KIMG_ALIGN, reserve_addr);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to relocate kernel\n" ); +pr_efi_err ("Failed to relocate kernel\n" ); *reserve_size =0 ;return status; }
drivers/firmware/efi/libstub/efi-stub-helper.c +17 -17
@@ -58,7 +58,7 @@ struct file_info {u64 size; }; -void efi_printk (efi_system_table_t *sys_table_arg,char *str) +void efi_printk (char *str) {char *s8;
@@ -68,10 +68,10 @@ void efi_printk(efi_system_table_t *sys_table_arg, char *str) ch[0 ] = *s8;if (*s8 =='\n' ) {efi_char16_t nl[2 ] = {'\r' ,0 }; -efi_char16_printk (sys_table_arg, nl); +efi_char16_printk (nl); } -efi_char16_printk (sys_table_arg, ch); +efi_char16_printk (ch); } }
@@ -372,9 +372,9 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh, status = fh->open (fh, &h, filename_16,EFI_FILE_MODE_READ ,0 );if (status !=EFI_SUCCESS ) { -efi_printk (sys_table_arg,"Failed to open file: " ); -efi_char16_printk (sys_table_arg, filename_16); -efi_printk (sys_table_arg,"\n" ); +efi_printk ("Failed to open file: " ); +efi_char16_printk (filename_16); +efi_printk ("\n" );return status; }
@@ -383,7 +383,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh, info_sz =0 ; status = h->get_info (h, &info_guid, &info_sz,NULL );if (status !=EFI_BUFFER_TOO_SMALL ) { -efi_printk (sys_table_arg,"Failed to get file info size\n" ); +efi_printk ("Failed to get file info size\n" );return status; }
@@ -391,7 +391,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh, status =efi_call_early (allocate_pool,EFI_LOADER_DATA , info_sz, (void **)&info);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table_arg,"Failed to alloc mem for file info\n" ); +efi_printk ("Failed to alloc mem for file info\n" );return status; }
@@ -405,7 +405,7 @@ static efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,efi_call_early (free_pool, info);if (status !=EFI_SUCCESS ) -efi_printk (sys_table_arg,"Failed to get initrd info\n" ); +efi_printk ("Failed to get initrd info\n" );return status; }
@@ -434,13 +434,13 @@ static efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, status =efi_call_early (handle_protocol, handle, &fs_proto, (void **)&io);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table_arg,"Failed to handle fs_proto\n" ); +efi_printk ("Failed to handle fs_proto\n" );return status; } status = io->open_volume (io, &fh);if (status !=EFI_SUCCESS ) -efi_printk (sys_table_arg,"Failed to open volume\n" ); +efi_printk ("Failed to open volume\n" );else *__fh = fh;
@@ -569,7 +569,7 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg, status =efi_call_early (allocate_pool,EFI_LOADER_DATA , nr_files *sizeof (*files), (void **)&files);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to alloc mem for file handle list\n" ); +pr_efi_err ("Failed to alloc mem for file handle list\n" ); goto fail; }
@@ -632,13 +632,13 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg, status =efi_high_alloc (sys_table_arg, file_size_total,0x1000 , &file_addr, max_addr);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to alloc highmem for files\n" ); +pr_efi_err ("Failed to alloc highmem for files\n" ); goto close_handles; }/* We've run out of free low memory. */ if (file_addr > max_addr) { -pr_efi_err (sys_table_arg,"We've run out of free low memory\n" ); +pr_efi_err ("We've run out of free low memory\n" ); status =EFI_INVALID_PARAMETER ; goto free_file_total; }
@@ -660,7 +660,7 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg, &chunksize, (void *)addr);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to read file\n" ); +pr_efi_err ("Failed to read file\n" ); goto free_file_total; } addr += chunksize;
@@ -746,7 +746,7 @@ efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg, alignment, &new_addr, min_addr); }if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table_arg,"Failed to allocate usable memory for kernel.\n" ); +pr_efi_err ("Failed to allocate usable memory for kernel.\n" );return status; }
@@ -956,7 +956,7 @@ void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid)return NULL ; } -void efi_char16_printk (efi_system_table_t *table,efi_char16_t *str) +void efi_char16_printk (efi_char16_t *str) { efi_call_proto(efi_simple_text_output_protocol, output_string,
drivers/firmware/efi/libstub/efistub.h +5 -4
@@ -31,13 +31,14 @@ extern int __pure novamap(void);extern __pure efi_system_table_t *efi_system_table (void ); -#define pr_efi (sys_table, msg) do { \ - if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \ +#define pr_efi (msg) do { \ + if (!is_quiet()) efi_printk("EFI stub: "msg); \ } while (0) -#define pr_efi_err (sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg) +#define pr_efi_err (msg) efi_printk("EFI stub: ERROR: "msg) -void efi_char16_printk (efi_system_table_t *,efi_char16_t *); +void efi_char16_printk (efi_char16_t *); +void efi_char16_printk (efi_char16_t *);unsigned long get_dram_base (efi_system_table_t *sys_table_arg);
drivers/firmware/efi/libstub/fdt.c +8 -8
@@ -40,7 +40,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,/* Do some checks on provided FDT, if it exists: */ if (orig_fdt) {if (fdt_check_header (orig_fdt)) { -pr_efi_err (sys_table,"Device Tree header not valid!\n" ); +pr_efi_err ("Device Tree header not valid!\n" );return EFI_LOAD_ERROR ; }/*
@@ -48,7 +48,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,* configuration table: */ if (orig_fdt_size &&fdt_totalsize (orig_fdt) > orig_fdt_size) { -pr_efi_err (sys_table,"Truncated device tree! foo!\n" ); +pr_efi_err ("Truncated device tree! foo!\n" );return EFI_LOAD_ERROR ; } }
@@ -277,17 +277,17 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,*/ status =efi_get_memory_map (sys_table, &map);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Unable to retrieve UEFI memory map.\n" ); +pr_efi_err ("Unable to retrieve UEFI memory map.\n" );return status; } -pr_efi (sys_table,"Exiting boot services and installing virtual address map...\n" ); +pr_efi ("Exiting boot services and installing virtual address map...\n" ); map.map = &memory_map; status =efi_high_alloc (sys_table,MAX_FDT_SIZE ,EFI_FDT_ALIGN , new_fdt_addr, max_addr);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Unable to allocate memory for new device tree.\n" ); +pr_efi_err ("Unable to allocate memory for new device tree.\n" ); goto fail; }
@@ -304,7 +304,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, initrd_addr, initrd_size);if (status !=EFI_SUCCESS ) { -pr_efi_err (sys_table,"Unable to construct new device tree.\n" ); +pr_efi_err ("Unable to construct new device tree.\n" ); goto fail_free_new_fdt; }
@@ -350,7 +350,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,return EFI_SUCCESS ; } -pr_efi_err (sys_table,"Exit boot services failed.\n" ); +pr_efi_err ("Exit boot services failed.\n" ); fail_free_new_fdt:efi_free (sys_table,MAX_FDT_SIZE , *new_fdt_addr);
@@ -371,7 +371,7 @@ void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size)return NULL ;if (fdt_check_header (fdt) !=0 ) { -pr_efi_err (sys_table,"Invalid header detected on UEFI supplied FDT, ignoring ...\n" ); +pr_efi_err ("Invalid header detected on UEFI supplied FDT, ignoring ...\n" );return NULL ; } *fdt_size =fdt_totalsize (fdt);
drivers/firmware/efi/libstub/secureboot.c +2 -2
@@ -72,10 +72,10 @@ enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table_arg)return efi_secureboot_mode_disabled; secure_boot_enabled: -pr_efi (sys_table_arg,"UEFI Secure Boot is enabled.\n" ); +pr_efi ("UEFI Secure Boot is enabled.\n" );return efi_secureboot_mode_enabled; out_efi_err: -pr_efi_err (sys_table_arg,"Could not determine UEFI Secure Boot status.\n" ); +pr_efi_err ("Could not determine UEFI Secure Boot status.\n" );return efi_secureboot_mode_unknown; }
drivers/firmware/efi/libstub/tpm.c +1 -2
@@ -131,8 +131,7 @@ void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table_arg) (void **) &log_tbl);if (status !=EFI_SUCCESS ) { -efi_printk (sys_table_arg, -"Unable to allocate memory for event log\n" ); +efi_printk ("Unable to allocate memory for event log\n" );return ; }
include/linux/efi.h +1 -1
@@ -1493,7 +1493,7 @@ static inline int efi_runtime_map_copy(void *buf, size_t bufsz)/* prototypes shared between arch specific and generic stub code */ -void efi_printk (efi_system_table_t *sys_table_arg,char *str); +void efi_printk (char *str);void efi_free (efi_system_table_t *sys_table_arg,unsigned long size,unsigned long addr);
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 19/25 efi/libstub: remove 'sys_table_arg' from all function prototypes
In reply to Ard BiesheuvelWe have a helper efi_system_table() that gives us the address of the EFI system table in memory, so there is no longer point in passing it around from each function to the next.
--- arch/arm/include/asm/efi.h | 4 +- arch/arm64/include/asm/efi.h | 3 +- arch/x86/boot/compressed/eboot.c | 40 +++++----- drivers/firmware/efi/libstub/arm-stub.c | 55 +++++++------- drivers/firmware/efi/libstub/arm32-stub.c | 26 +++---- drivers/firmware/efi/libstub/arm64-stub.c | 12 ++- .../firmware/efi/libstub/efi-stub-helper.c | 74 +++++++++---------- drivers/firmware/efi/libstub/efistub.h | 17 ++--- drivers/firmware/efi/libstub/fdt.c | 37 +++++----- drivers/firmware/efi/libstub/gop.c | 10 +-- drivers/firmware/efi/libstub/random.c | 10 +-- drivers/firmware/efi/libstub/secureboot.c | 2 +- drivers/firmware/efi/libstub/tpm.c | 7 +- include/linux/efi.h | 43 ++++------- 14 files changed, 148 insertions(+), 192 deletions(-)
arch/arm/include/asm/efi.h +2 -2
@@ -60,8 +60,8 @@ void efi_virtmap_unload(void);#define efi_call_proto (protocol, f, instance, ...) \ instance->f(instance, ##__VA_ARGS__) -struct screen_info *alloc_screen_info (efi_system_table_t *sys_table_arg); -void free_screen_info (efi_system_table_t *sys_table,struct screen_info *si); +struct screen_info *alloc_screen_info (void ); +void free_screen_info (struct screen_info *si);static inline void efifb_setup_from_dmi (struct screen_info *si,const char *opt) {
arch/arm64/include/asm/efi.h +1 -2
@@ -105,8 +105,7 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base, #define alloc_screen_info(x...) &screen_info -static inline void free_screen_info (efi_system_table_t *sys_table_arg, -struct screen_info *si) +static inline void free_screen_info (struct screen_info *si) { }
arch/x86/boot/compressed/eboot.c +18 -22
@@ -340,7 +340,7 @@ void setup_graphics(struct boot_params *boot_params)EFI_LOCATE_BY_PROTOCOL , &graphics_proto, NULL, &size, gop_handle);if (status ==EFI_BUFFER_TOO_SMALL ) - status =efi_setup_gop (NULL , si, &graphics_proto, size); + status =efi_setup_gop (si, &graphics_proto, size);if (status !=EFI_SUCCESS ) { size =0 ;
@@ -390,8 +390,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,return status; } - status =efi_low_alloc (sys_table,0x4000 ,1 , - (unsigned long *)&boot_params); + status =efi_low_alloc (0x4000 ,1 , (unsigned long *)&boot_params);if (status !=EFI_SUCCESS ) {efi_printk ("Failed to allocate lowmem for boot params\n" );return status;
@@ -416,7 +415,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, hdr->type_of_loader =0x21 ;/* Convert unicode cmdline to ascii */ - cmdline_ptr =efi_convert_cmdline (sys_table, image, &options_size); + cmdline_ptr =efi_convert_cmdline (image, &options_size);if (!cmdline_ptr) goto fail;
@@ -434,7 +433,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,if (status !=EFI_SUCCESS ) goto fail2; - status =handle_cmdline_files (sys_table, image, + status =handle_cmdline_files (image, (char *)(unsigned long )hdr->cmd_line_ptr,"initrd=" , hdr->initrd_addr_max, &ramdisk_addr, &ramdisk_size);
@@ -442,7 +441,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,if (status !=EFI_SUCCESS && hdr->xloadflags &XLF_CAN_BE_LOADED_ABOVE_4G ) {efi_printk ("Trying to load files to higher address\n" ); - status =handle_cmdline_files (sys_table, image, + status =handle_cmdline_files (image, (char *)(unsigned long )hdr->cmd_line_ptr,"initrd=" ,-1UL , &ramdisk_addr, &ramdisk_size);
@@ -461,9 +460,9 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,/* not reached */ fail2: -efi_free (sys_table, options_size, hdr->cmd_line_ptr); +efi_free (options_size, hdr->cmd_line_ptr); fail: -efi_free (sys_table,0x4000 , (unsigned long )boot_params); +efi_free (0x4000 , (unsigned long )boot_params);return status; }
@@ -630,7 +629,7 @@ static efi_status_t allocate_e820(struct boot_params *params, boot_map.key_ptr =NULL ; boot_map.buff_size = &buff_size; - status =efi_get_memory_map (sys_table, &boot_map); + status =efi_get_memory_map (&boot_map);if (status !=EFI_SUCCESS )return status;
@@ -652,8 +651,7 @@ struct exit_boot_struct {struct efi_info *efi; }; -static efi_status_t exit_boot_func (efi_system_table_t *sys_table_arg, -struct efi_boot_memmap *map, +static efi_status_t exit_boot_func (struct efi_boot_memmap *map,void *priv) {const char *signature;
@@ -663,14 +661,14 @@ static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg, : EFI32_LOADER_SIGNATURE;memcpy (&p->efi->efi_loader_signature, signature,sizeof (__u32)); - p->efi->efi_systab = (unsigned long )sys_table_arg; + p->efi->efi_systab = (unsigned long )efi_system_table (); p->efi->efi_memdesc_size = *map->desc_size; p->efi->efi_memdesc_version = *map->desc_ver; p->efi->efi_memmap = (unsigned long )*map->map; p->efi->efi_memmap_size = *map->map_size;#ifdef CONFIG_X86_64 - p->efi->efi_systab_hi = (unsigned long )sys_table_arg >>32 ; + p->efi->efi_systab_hi = (unsigned long )efi_system_table () >>32 ; p->efi->efi_memmap_hi = (unsigned long )*map->map >>32 ;#endif
@@ -702,8 +700,7 @@ static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)return status;/* Might as well exit boot services now */ - status =efi_exit_boot_services (sys_table, handle, &map, &priv, - exit_boot_func); + status =efi_exit_boot_services (handle, &map, &priv, exit_boot_func);if (status !=EFI_SUCCESS )return status;
@@ -755,14 +752,14 @@ struct boot_params *efi_main(efi_handle_t handle,* otherwise we ask the BIOS. */ if (boot_params->secure_boot == efi_secureboot_mode_unset) - boot_params->secure_boot =efi_get_secureboot (sys_table); + boot_params->secure_boot =efi_get_secureboot ();/* Ask the firmware to clear memory on unclean shutdown */ -efi_enable_reset_attack_mitigation (sys_table); +efi_enable_reset_attack_mitigation (); -efi_random_get_seed (sys_table); +efi_random_get_seed (); -efi_retrieve_tpm2_eventlog (sys_table); +efi_retrieve_tpm2_eventlog ();setup_graphics (boot_params);
@@ -778,8 +775,7 @@ struct boot_params *efi_main(efi_handle_t handle, } gdt->size =0x800 ; - status =efi_low_alloc (sys_table, gdt->size,8 , - (unsigned long *)&gdt->address); + status =efi_low_alloc (gdt->size,8 , (unsigned long *)&gdt->address);if (status !=EFI_SUCCESS ) {efi_printk ("Failed to allocate memory for 'gdt'\n" ); goto fail;
@@ -791,7 +787,7 @@ struct boot_params *efi_main(efi_handle_t handle,*/ if (hdr->pref_address != hdr->code32_start) {unsigned long bzimage_addr = hdr->code32_start; - status = efi_relocate_kernel(sys_table, &bzimage_addr, + status = efi_relocate_kernel(&bzimage_addr, hdr->init_size, hdr->init_size, hdr->pref_address, hdr->kernel_alignment,
drivers/firmware/efi/libstub/arm-stub.c +26 -29
160 lines not on this page · raw message
drivers/firmware/efi/libstub/arm32-stub.c +11 -15
@@ -7,7 +7,7 @@#include "efistub.h" -efi_status_t check_platform_features (efi_system_table_t *sys_table_arg) +efi_status_t check_platform_features (void ) {int block;
@@ -26,7 +26,7 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg)static efi_guid_t screen_info_guid =LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID ; -struct screen_info *alloc_screen_info (efi_system_table_t *sys_table_arg) +struct screen_info *alloc_screen_info (void ) {struct screen_info *si;efi_status_t status;
@@ -52,7 +52,7 @@ struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg)return NULL ; } -void free_screen_info (efi_system_table_t *sys_table_arg,struct screen_info *si) +void free_screen_info (struct screen_info *si) {if (!si)return ;
@@ -61,8 +61,7 @@ void free_screen_info(efi_system_table_t *sys_table_arg, struct screen_info *si)efi_call_early (free_pool, si); } -static efi_status_t reserve_kernel_base (efi_system_table_t *sys_table_arg, -unsigned long dram_base, +static efi_status_t reserve_kernel_base (unsigned long dram_base,unsigned long *reserve_addr,unsigned long *reserve_size) {
@@ -119,7 +118,7 @@ static efi_status_t reserve_kernel_base(efi_system_table_t *sys_table_arg,* released to the OS after ExitBootServices(), the decompressor can * safely overwrite them. */ - status =efi_get_memory_map (sys_table_arg, &map); + status =efi_get_memory_map (&map);if (status !=EFI_SUCCESS ) {pr_efi_err ("reserve_kernel_base(): Unable to retrieve memory map.\n" );return status;
@@ -190,8 +189,7 @@ static efi_status_t reserve_kernel_base(efi_system_table_t *sys_table_arg,return status; } -efi_status_t handle_kernel_image(efi_system_table_t *sys_table, - unsigned long *image_addr, +efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size,
@@ -219,8 +217,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table,*/ kernel_base +=TEXT_OFFSET -5 *PAGE_SIZE ; - status =reserve_kernel_base (sys_table, kernel_base, reserve_addr, - reserve_size); + status =reserve_kernel_base (kernel_base, reserve_addr, reserve_size);if (status !=EFI_SUCCESS ) {pr_efi_err ("Unable to allocate memory for uncompressed kernel.\n" );return status;
@@ -231,12 +228,11 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table,* memory window. */ *image_size = image->image_size; - status =efi_relocate_kernel (sys_table, image_addr, *image_size, - *image_size, + status =efi_relocate_kernel (image_addr, *image_size, *image_size, kernel_base +MAX_UNCOMP_KERNEL_SIZE ,0 ,0 );if (status !=EFI_SUCCESS ) {pr_efi_err ("Failed to relocate kernel.\n" ); -efi_free (sys_table, *reserve_size, *reserve_addr); +efi_free (*reserve_size, *reserve_addr); *reserve_size =0 ;return status; }
@@ -248,9 +244,9 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table,*/ if (*image_addr + *image_size > dram_base +ZIMAGE_OFFSET_LIMIT ) {pr_efi_err ("Failed to relocate kernel, no low memory available.\n" ); -efi_free (sys_table, *reserve_size, *reserve_addr); +efi_free (*reserve_size, *reserve_addr); *reserve_size =0 ; -efi_free (sys_table, *image_size, *image_addr); +efi_free (*image_size, *image_addr); *image_size =0 ;return EFI_LOAD_ERROR ; }
drivers/firmware/efi/libstub/arm64-stub.c +5 -7
@@ -21,7 +21,7 @@#include "efistub.h" -efi_status_t check_platform_features (efi_system_table_t *sys_table_arg) +efi_status_t check_platform_features (void ) {u64 tg;
@@ -40,8 +40,7 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg)return EFI_SUCCESS ; } -efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg, - unsigned long *image_addr, +efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size,
@@ -56,8 +55,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg,if (IS_ENABLED (CONFIG_RANDOMIZE_BASE )) {if (!nokaslr ()) { - status =efi_get_random_bytes (sys_table_arg, -sizeof (phys_seed), + status =efi_get_random_bytes (sizeof (phys_seed), (u8 *)&phys_seed);if (status ==EFI_NOT_FOUND ) {pr_efi ("EFI_RNG_PROTOCOL unavailable, no randomness supplied\n" );
@@ -108,7 +106,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg,* locate the kernel at a randomized offset in physical memory. */ *reserve_size = kernel_memsize + offset; - status =efi_random_alloc (sys_table_arg, *reserve_size, + status =efi_random_alloc (*reserve_size,MIN_KIMG_ALIGN , reserve_addr, (u32 )phys_seed);
@@ -139,7 +137,7 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg,if (status !=EFI_SUCCESS ) { *reserve_size = kernel_memsize +TEXT_OFFSET ; - status =efi_low_alloc (sys_table_arg, *reserve_size, + status =efi_low_alloc (*reserve_size,MIN_KIMG_ALIGN , reserve_addr);if (status !=EFI_SUCCESS ) {
drivers/firmware/efi/libstub/efi-stub-helper.c +33 -41
215 lines not on this page · raw message
drivers/firmware/efi/libstub/efistub.h +7 -10
@@ -40,10 +40,9 @@ extern __pure efi_system_table_t *efi_system_table(void);void efi_char16_printk (efi_char16_t *);void efi_char16_printk (efi_char16_t *); -unsigned long get_dram_base (efi_system_table_t *sys_table_arg); +unsigned long get_dram_base (void ); -efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, - void *handle, +efi_status_t allocate_new_fdt_and_exit_boot(void *handle, unsigned long *new_fdt_addr, unsigned long max_addr, u64 initrd_addr, u64 initrd_size,
@@ -51,22 +50,20 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,unsigned long fdt_addr, unsigned long fdt_size); -void *get_fdt (efi_system_table_t *sys_table,unsigned long *fdt_size); +void *get_fdt (unsigned long *fdt_size);void efi_get_virtmap (efi_memory_desc_t *memory_map,unsigned long map_size,unsigned long desc_size,efi_memory_desc_t *runtime_map,int *count); -efi_status_t efi_get_random_bytes (efi_system_table_t *sys_table, -unsigned long size,u8 *out); +efi_status_t efi_get_random_bytes (unsigned long size,u8 *out); -efi_status_t efi_random_alloc (efi_system_table_t *sys_table_arg, -unsigned long size,unsigned long align, +efi_status_t efi_random_alloc (unsigned long size,unsigned long align,unsigned long *addr,unsigned long random_seed); -efi_status_t check_platform_features (efi_system_table_t *sys_table_arg); +efi_status_t check_platform_features (void ); -void *get_efi_config_table (efi_system_table_t *sys_table,efi_guid_t guid); +void *get_efi_config_table (efi_guid_t guid);/* Helper macros for the usual case of using simple C variables: */ #ifndef fdt_setprop_inplace_var
drivers/firmware/efi/libstub/fdt.c +17 -20
@@ -16,7 +16,7 @@#define EFI_DT_ADDR_CELLS_DEFAULT 2#define EFI_DT_SIZE_CELLS_DEFAULT 2 -static void fdt_update_cell_size (efi_system_table_t *sys_table,void *fdt) +static void fdt_update_cell_size (void *fdt) {int offset;
@@ -27,8 +27,7 @@ static void fdt_update_cell_size(efi_system_table_t *sys_table, void *fdt)fdt_setprop_u32 (fdt, offset,"#size-cells" ,EFI_DT_SIZE_CELLS_DEFAULT ); } -static efi_status_t update_fdt (efi_system_table_t *sys_table,void *orig_fdt, -unsigned long orig_fdt_size, +static efi_status_t update_fdt (void *orig_fdt,unsigned long orig_fdt_size,void *fdt,int new_fdt_size,char *cmdline_ptr,u64 initrd_addr,u64 initrd_size) {
@@ -62,7 +61,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,* Any failure from the following function is * non-critical: */ -fdt_update_cell_size (sys_table, fdt); +fdt_update_cell_size (fdt); } }
@@ -111,7 +110,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,/* Add FDT entries for EFI runtime services in chosen node. */ node =fdt_subnode_offset (fdt,0 ,"chosen" ); - fdt_val64 =cpu_to_fdt64 ((u64 )(unsigned long )sys_table); + fdt_val64 =cpu_to_fdt64 ((u64 )(unsigned long )efi_system_table ()); status =fdt_setprop_var (fdt, node,"linux,uefi-system-table" , fdt_val64);if (status)
@@ -140,7 +139,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,if (IS_ENABLED (CONFIG_RANDOMIZE_BASE )) {efi_status_t efi_status; - efi_status =efi_get_random_bytes (sys_table,sizeof (fdt_val64), + efi_status =efi_get_random_bytes (sizeof (fdt_val64), (u8 *)&fdt_val64);if (efi_status ==EFI_SUCCESS ) { status =fdt_setprop_var (fdt, node,"kaslr-seed" , fdt_val64);
@@ -210,8 +209,7 @@ struct exit_boot_struct {void *new_fdt_addr; }; -static efi_status_t exit_boot_func (efi_system_table_t *sys_table_arg, -struct efi_boot_memmap *map, +static efi_status_t exit_boot_func (struct efi_boot_memmap *map,void *priv) {struct exit_boot_struct *p = priv;
@@ -244,8 +242,7 @@ static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg,* with the final memory map in it. */ -efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, - void *handle, +efi_status_t allocate_new_fdt_and_exit_boot(void *handle, unsigned long *new_fdt_addr, unsigned long max_addr, u64 initrd_addr, u64 initrd_size,
@@ -275,7 +272,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,* subsequent allocations adding entries, since they could not affect * the number of EFI_MEMORY_RUNTIME regions. */ - status =efi_get_memory_map (sys_table, &map); + status =efi_get_memory_map (&map);if (status !=EFI_SUCCESS ) {pr_efi_err ("Unable to retrieve UEFI memory map.\n" );return status;
@@ -284,7 +281,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,pr_efi ("Exiting boot services and installing virtual address map...\n" ); map.map = &memory_map; - status =efi_high_alloc (sys_table,MAX_FDT_SIZE ,EFI_FDT_ALIGN , + status =efi_high_alloc (MAX_FDT_SIZE ,EFI_FDT_ALIGN , new_fdt_addr, max_addr);if (status !=EFI_SUCCESS ) {pr_efi_err ("Unable to allocate memory for new device tree.\n" );
@@ -295,11 +292,11 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,* Now that we have done our final memory allocation (and free) * we can get the memory map key needed for exit_boot_services(). */ - status =efi_get_memory_map (sys_table, &map); + status =efi_get_memory_map (&map);if (status !=EFI_SUCCESS ) goto fail_free_new_fdt; - status =update_fdt (sys_table, (void *)fdt_addr, fdt_size, + status =update_fdt ((void *)fdt_addr, fdt_size, (void *)*new_fdt_addr,MAX_FDT_SIZE , cmdline_ptr, initrd_addr, initrd_size);
@@ -313,7 +310,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, priv.runtime_entry_count = &runtime_entry_count; priv.new_fdt_addr = (void *)*new_fdt_addr; - status =efi_exit_boot_services (sys_table, handle, &map, &priv, exit_boot_func); + status =efi_exit_boot_services (handle, &map, &priv, exit_boot_func);if (status ==EFI_SUCCESS ) {efi_set_virtual_address_map_t *svam;
@@ -322,7 +319,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,return EFI_SUCCESS ;/* Install the new virtual address map */ - svam = sys_table->runtime->set_virtual_address_map; + svam =efi_system_table ()->runtime->set_virtual_address_map; status =svam (runtime_entry_count * desc_size, desc_size, desc_ver, runtime_map);
@@ -353,19 +350,19 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,pr_efi_err ("Exit boot services failed.\n" ); fail_free_new_fdt: -efi_free (sys_table,MAX_FDT_SIZE , *new_fdt_addr); +efi_free (MAX_FDT_SIZE , *new_fdt_addr); fail: - sys_table->boottime->free_pool (runtime_map); +efi_system_table ()->boottime->free_pool (runtime_map);return EFI_LOAD_ERROR ; } -void *get_fdt (efi_system_table_t *sys_table,unsigned long *fdt_size) +void *get_fdt (unsigned long *fdt_size) {void *fdt; - fdt =get_efi_config_table (sys_table,DEVICE_TREE_GUID ); + fdt =get_efi_config_table (DEVICE_TREE_GUID );if (!fdt)return NULL ;
drivers/firmware/efi/libstub/gop.c +4 -6
@@ -88,9 +88,8 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,#define efi_gop_attr (table, attr, instance) \ (efi_table_attr(efi_graphics_output_protocol##table, attr, instance)) -static efi_status_t -setup_gop (efi_system_table_t *sys_table_arg,struct screen_info *si, -efi_guid_t *proto,unsigned long size,void **handles) +static efi_status_t setup_gop (struct screen_info *si,efi_guid_t *proto, +unsigned long size,void **handles) {efi_graphics_output_protocol_t *gop, *first_gop;u16 width, height;
@@ -185,8 +184,7 @@ setup_gop(efi_system_table_t *sys_table_arg, struct screen_info *si,/* * See if we have Graphics Output Protocol */ -efi_status_t efi_setup_gop (efi_system_table_t *sys_table_arg, -struct screen_info *si,efi_guid_t *proto, +efi_status_t efi_setup_gop (struct screen_info *si,efi_guid_t *proto,unsigned long size) {efi_status_t status;
@@ -203,7 +201,7 @@ efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,if (status !=EFI_SUCCESS ) goto free_handle; - status =setup_gop (sys_table_arg, si, proto, size, gop_handle); + status =setup_gop (si, proto, size, gop_handle); free_handle:efi_call_early (free_pool, gop_handle);
drivers/firmware/efi/libstub/random.c +4 -6
@@ -26,8 +26,7 @@ union efi_rng_protocol { } mixed_mode; }; -efi_status_t efi_get_random_bytes (efi_system_table_t *sys_table_arg, -unsigned long size,u8 *out) +efi_status_t efi_get_random_bytes (unsigned long size,u8 *out) {efi_guid_t rng_proto =EFI_RNG_PROTOCOL_GUID ;efi_status_t status;
@@ -79,8 +78,7 @@ static unsigned long get_entry_num_slots(efi_memory_desc_t *md,*/ #define MD_NUM_SLOTS (md) ((md)->virt_addr) -efi_status_t efi_random_alloc (efi_system_table_t *sys_table_arg, -unsigned long size, +efi_status_t efi_random_alloc (unsigned long size,unsigned long align,unsigned long *addr,unsigned long random_seed)
@@ -99,7 +97,7 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, map.key_ptr =NULL ; map.buff_size = &buff_size; - status =efi_get_memory_map (sys_table_arg, &map); + status =efi_get_memory_map (&map);if (status !=EFI_SUCCESS )return status;
@@ -155,7 +153,7 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg,return status; } -efi_status_t efi_random_get_seed (efi_system_table_t *sys_table_arg) +efi_status_t efi_random_get_seed (void ) {efi_guid_t rng_proto =EFI_RNG_PROTOCOL_GUID ;efi_guid_t rng_algo_raw =EFI_RNG_ALGORITHM_RAW ;
drivers/firmware/efi/libstub/secureboot.c +1 -1
@@ -32,7 +32,7 @@ static const efi_char16_t shim_MokSBState_name[] = L"MokSBState";* Please keep the logic in sync with * arch/x86/xen/efi.c:xen_efi_get_secureboot(). */ -enum efi_secureboot_mode efi_get_secureboot (efi_system_table_t *sys_table_arg) +enum efi_secureboot_mode efi_get_secureboot (void ) {u32 attr;u8 secboot, setupmode, moksbstate;
drivers/firmware/efi/libstub/tpm.c +3 -4
@@ -36,7 +36,7 @@ static const efi_char16_t efi_MemoryOverWriteRequest_name[] =* are cleared. If userland has ensured that all secrets have been removed * from RAM before reboot it can simply reset this variable. */ -void efi_enable_reset_attack_mitigation (efi_system_table_t *sys_table_arg) +void efi_enable_reset_attack_mitigation (void ) {u8 val =1 ;efi_guid_t var_guid =MEMORY_ONLY_RESET_CONTROL_GUID ;
@@ -57,7 +57,7 @@ void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg)#endif -void efi_retrieve_tpm2_eventlog (efi_system_table_t *sys_table_arg) +void efi_retrieve_tpm2_eventlog (void ) {efi_guid_t tcg2_guid =EFI_TCG2_PROTOCOL_GUID ;efi_guid_t linux_eventlog_guid =LINUX_EFI_TPM_EVENT_LOG_GUID ;
@@ -139,8 +139,7 @@ void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table_arg)* Figure out whether any events have already been logged to the * final events structure, and if so how much space they take up */ - final_events_table =get_efi_config_table (sys_table_arg, -LINUX_EFI_TPM_FINAL_LOG_GUID ); + final_events_table =get_efi_config_table (LINUX_EFI_TPM_FINAL_LOG_GUID );if (final_events_table && final_events_table->nr_events) {struct tcg_pcr_event2_head *header;int offset;
include/linux/efi.h +16 -27
99 lines not on this page · raw message
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 20/25 efi/libstub/x86: work around page freeing issue in mixed mode
In reply to Ard BiesheuvelMixed mode translates calls from the 64-bit kernel into the 32-bit firmware by wrapping them in a call to a thunking routine that pushes a 32-bit word onto the stack for each argument passed to the function, regardless of the argument type. This works surprisingly well for most services and protocols, with the exception of ones that take explicit 64-bit arguments.
efi_free() invokes the FreePages() EFI boot service, which takes a efi_physical_addr_t as its address argument, and this is one of those 64-bit types. This means that the 32-bit firmware will interpret the (addr, size) pair as a single 64-bit quantity, and since it is guaranteed to have the high word set (as size > 0), it will always fail due to the fact that EFI memory allocations are always < 4 GB on 32-bit firmware.
So let's fix this by giving the thunking code a little hand, and pass two values for the address, and a third one for the size.
--- arch/x86/boot/compressed/eboot.c | 16 ++++++++++++++++ drivers/firmware/efi/libstub/efi-stub-helper.c | 5 ++++- 2 files changed, 20 insertions(+), 1 deletion(-)
arch/x86/boot/compressed/eboot.c +16 -0
@@ -901,3 +901,19 @@ struct boot_params *efi_main(efi_handle_t handle,for (;;) asm("hlt" ); } + +#ifdef CONFIG_EFI_MIXED +void efi_free_native (unsigned long size,unsigned long addr); + +void efi_free (unsigned long size,unsigned long addr) +{ +if (!size) +return ; + +if (efi_is_native ()) +efi_free_native (size, addr); +else +efi64_thunk (efi_system_table ()->boottime->mixed_mode.free_pages, + addr,0 ,DIV_ROUND_UP (size,EFI_PAGE_SIZE )); +} +#endif
drivers/firmware/efi/libstub/efi-stub-helper.c +4 -1
@@ -346,6 +346,9 @@ efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, } void efi_free(unsigned long size, unsigned long addr) + __weak __alias(efi_free_native); + +void efi_free_native (unsigned long size,unsigned long addr) {unsigned long nr_pages;
@@ -353,7 +356,7 @@ void efi_free(unsigned long size, unsigned long addr)return ; nr_pages =round_up (size,EFI_ALLOC_ALIGN ) /EFI_PAGE_SIZE ; -efi_call_early (free_pages, addr, nr_pages); +efi_system_table ()->boottime->free_pages (addr, nr_pages); } static efi_status_t efi_file_size(void *__fh, efi_char16_t *filename_16,
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 21/25 efi/libstub: drop protocol argument from efi_call_proto() macro
In reply to Ard BiesheuvelAfter refactoring the mixed mode support code, efi_call_proto() no longer uses its protocol argument in any of its implementation, so let's remove it altogether.
--- arch/arm/include/asm/efi.h | 3 +-- arch/arm64/include/asm/efi.h | 3 +-- arch/x86/boot/compressed/eboot.c | 23 ++++++++----------- arch/x86/include/asm/efi.h | 6 ++--- .../firmware/efi/libstub/efi-stub-helper.c | 6 ++--- drivers/firmware/efi/libstub/random.c | 8 +++---- drivers/firmware/efi/libstub/tpm.c | 11 ++++----- 7 files changed, 25 insertions(+), 35 deletions(-)
arch/arm/include/asm/efi.h +1 -2
@@ -57,8 +57,7 @@ void efi_virtmap_unload(void);#define efi_table_attr (table, attr, instance) \ instance->attr -#define efi_call_proto (protocol, f, instance, ...) \ - instance->f(instance, ##__VA_ARGS__) +#define efi_call_proto (inst, func, ...) inst->func(inst, ##__VA_ARGS__)struct screen_info *alloc_screen_info (void );void free_screen_info (struct screen_info *si);
arch/arm64/include/asm/efi.h +1 -2
@@ -100,8 +100,7 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,#define efi_table_attr (table, attr, instance) \ instance->attr -#define efi_call_proto (protocol, f, instance, ...) \ - instance->f(instance, ##__VA_ARGS__) +#define efi_call_proto (inst, func, ...) inst->func(inst, ##__VA_ARGS__) #define alloc_screen_info(x...) &screen_info
arch/x86/boot/compressed/eboot.c +9 -14
@@ -69,27 +69,24 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) rom->pcilen = pci->romsize; *__rom = rom; - status =efi_call_proto (efi_pci_io_protocol, pci.read, pci, - EfiPciIoWidthUint16,PCI_VENDOR_ID ,1 , - &rom->vendor); + status =efi_call_proto (pci, pci.read, EfiPciIoWidthUint16, +PCI_VENDOR_ID ,1 , &rom->vendor);if (status !=EFI_SUCCESS ) {efi_printk ("Failed to read rom->vendor\n" ); goto free_struct; } - status =efi_call_proto (efi_pci_io_protocol, pci.read, pci, - EfiPciIoWidthUint16,PCI_DEVICE_ID ,1 , - &rom->devid); + status =efi_call_proto (pci, pci.read, EfiPciIoWidthUint16, +PCI_DEVICE_ID ,1 , &rom->devid);if (status !=EFI_SUCCESS ) {efi_printk ("Failed to read rom->devid\n" ); goto free_struct; } - status =efi_call_proto (efi_pci_io_protocol, get_location, pci, - &rom->segment, &rom->bus, &rom->device, - &rom->function); + status =efi_call_proto (pci, get_location, &rom->segment, &rom->bus, + &rom->device, &rom->function);if (status !=EFI_SUCCESS ) goto free_struct;
@@ -191,7 +188,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)return ; } -efi_call_proto (apple_properties_protocol, get_all, p,NULL , &size); +efi_call_proto (p, get_all,NULL , &size);if (!size)return ;
@@ -204,8 +201,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)return ; } - status =efi_call_proto (apple_properties_protocol, get_all, p, - new->data, &size); + status =efi_call_proto (p, get_all, new->data, &size);if (status ==EFI_BUFFER_TOO_SMALL )efi_call_early (free_pool, new);
@@ -280,8 +276,7 @@ setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) pciio =NULL ;efi_call_early (handle_protocol, handle, &pciio_proto, &pciio); - status =efi_call_proto (efi_uga_draw_protocol, get_mode, uga, - &w, &h, &depth, &refresh); + status =efi_call_proto (uga, get_mode, &w, &h, &depth, &refresh);if (status ==EFI_SUCCESS && (!first_uga || pciio)) { width = w; height = h;
arch/x86/include/asm/efi.h +3 -3
@@ -227,10 +227,10 @@ static inline bool efi_is_native(void) __ret; \ }) -#define efi_call_proto (protocol, f, instance, ...) \ +#define efi_call_proto (inst, func, ...) \ (efi_is_native() \ - ? instance->f(instance, ##__VA_ARGS__) \ - : efi64_thunk(instance->mixed_mode.f, instance, ##__VA_ARGS__)) + ? inst->func(inst, ##__VA_ARGS__) \ + : efi64_thunk(inst->mixed_mode.func, inst, ##__VA_ARGS__))#define efi_call_early (f, ...) \ (efi_is_native() \
drivers/firmware/efi/libstub/efi-stub-helper.c +2 -4
@@ -953,9 +953,7 @@ void *get_efi_config_table(efi_guid_t guid)void efi_char16_printk (efi_char16_t *str) { -efi_call_proto (efi_simple_text_output_protocol, - output_string, -efi_table_attr (efi_system_table, con_out, +efi_call_proto (efi_table_attr (efi_system_table, con_out,efi_system_table ()), - str); + output_string, str); }
drivers/firmware/efi/libstub/random.c +4 -4
@@ -37,7 +37,7 @@ efi_status_t efi_get_random_bytes(unsigned long size, u8 *out)if (status !=EFI_SUCCESS )return status; -return efi_call_proto (efi_rng_protocol, get_rng, rng,NULL , size, out); +return efi_call_proto (rng, get_rng,NULL , size, out); }/*
@@ -173,7 +173,7 @@ efi_status_t efi_random_get_seed(void)if (status !=EFI_SUCCESS )return status; - status =efi_call_proto (efi_rng_protocol, get_rng, rng, &rng_algo_raw, + status =efi_call_proto (rng, get_rng, &rng_algo_raw,EFI_RANDOM_SEED_SIZE , seed->bits);if (status ==EFI_UNSUPPORTED )
@@ -181,8 +181,8 @@ efi_status_t efi_random_get_seed(void)* Use whatever algorithm we have available if the raw algorithm * is not implemented. */ - status =efi_call_proto (efi_rng_protocol, get_rng, rng,NULL , -EFI_RANDOM_SEED_SIZE , seed->bits); + status =efi_call_proto (rng, get_rng,NULL , +EFI_RANDOM_SEED_SIZE , seed->bits);if (status !=EFI_SUCCESS ) goto err_freepool;
drivers/firmware/efi/libstub/tpm.c +5 -6
@@ -77,15 +77,14 @@ void efi_retrieve_tpm2_eventlog(void)if (status !=EFI_SUCCESS )return ; - status =efi_call_proto (efi_tcg2_protocol, get_event_log, - tcg2_protocol, version, &log_location, - &log_last_entry, &truncated); + status =efi_call_proto (tcg2_protocol, get_event_log, version, + &log_location, &log_last_entry, &truncated);if (status !=EFI_SUCCESS || !log_location) { version =EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 ; - status =efi_call_proto (efi_tcg2_protocol, get_event_log, - tcg2_protocol, version, &log_location, - &log_last_entry, &truncated); + status =efi_call_proto (tcg2_protocol, get_event_log, version, + &log_location, &log_last_entry, + &truncated);if (status !=EFI_SUCCESS || !log_location)return ;
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 22/25 efi/libstub: drop 'table' argument from efi_table_attr() macro
In reply to Ard BiesheuvelNone of the definitions of the efi_table_attr() still refer to their 'table' argument so let's get rid of it entirely.
--- arch/arm/include/asm/efi.h | 3 +-- arch/arm64/include/asm/efi.h | 3 +-- arch/x86/boot/compressed/eboot.c | 8 +++--- arch/x86/include/asm/efi.h | 25 +++++++------------ .../firmware/efi/libstub/efi-stub-helper.c | 11 +++----- drivers/firmware/efi/libstub/gop.c | 9 +++---- 6 files changed, 22 insertions(+), 37 deletions(-)
arch/arm/include/asm/efi.h +1 -2
@@ -54,8 +54,7 @@ void efi_virtmap_unload(void);#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__)#define efi_is_native () (true) -#define efi_table_attr (table, attr, instance) \ - instance->attr +#define efi_table_attr (inst, attr) (inst->attr)#define efi_call_proto (inst, func, ...) inst->func(inst, ##__VA_ARGS__)
arch/arm64/include/asm/efi.h +1 -2
@@ -97,8 +97,7 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__)#define efi_is_native () (true) -#define efi_table_attr (table, attr, instance) \ - instance->attr +#define efi_table_attr (inst, attr) (inst->attr)#define efi_call_proto (inst, func, ...) inst->func(inst, ##__VA_ARGS__)
arch/x86/boot/compressed/eboot.c +4 -4
@@ -47,8 +47,8 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)* large romsize. The UEFI spec limits the size of option ROMs to 16 * MiB so we reject any ROMs over 16 MiB in size to catch this. */ - romimage =efi_table_attr (efi_pci_io_protocol, romimage, pci); - romsize =efi_table_attr (efi_pci_io_protocol, romsize, pci); + romimage =efi_table_attr (pci, romimage); + romsize =efi_table_attr (pci, romsize);if (!romimage || !romsize || romsize >SZ_16M )return EFI_INVALID_PARAMETER ;
@@ -183,7 +183,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)if (status !=EFI_SUCCESS )return ; -if (efi_table_attr (apple_properties_protocol, version, p) !=0x10000 ) { +if (efi_table_attr (p, version) !=0x10000 ) {efi_printk ("Unsupported properties proto version\n" );return ; }
@@ -226,7 +226,7 @@ static const efi_char16_t apple[] = L"Apple";static void setup_quirks (struct boot_params *boot_params) {efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long ) -efi_table_attr (efi_system_table, fw_vendor, sys_table); +efi_table_attr (efi_system_table (), fw_vendor);if (!memcmp (fw_vendor, apple,sizeof (apple))) {if (IS_ENABLED (CONFIG_APPLE_PROPERTIES ))
arch/x86/include/asm/efi.h +9 -16
@@ -216,16 +216,11 @@ static inline bool efi_is_native(void) __builtin_types_compatible_p(u32, __typeof__(attr)), \ (unsigned long)(attr), (attr)) -#define efi_table_attr (table, attr, instance) ({ \ - __typeof__(instance->attr) __ret; \ - if (efi_is_native()) { \ - __ret = instance->attr; \ - } else { \ - __ret = (__typeof__(__ret)) \ - efi_mixed_mode_cast(instance->mixed_mode.attr); \ - } \ - __ret; \ -}) +#define efi_table_attr (inst, attr) \ + (efi_is_native() \ + ? inst->attr \ + : (__typeof__(inst->attr)) \ + efi_mixed_mode_cast(inst->mixed_mode.attr))#define efi_call_proto (inst, func, ...) \ (efi_is_native() \
@@ -235,16 +230,14 @@ static inline bool efi_is_native(void)#define efi_call_early (f, ...) \ (efi_is_native() \ ? efi_system_table()->boottime->f(__VA_ARGS__) \ - : efi64_thunk(efi_table_attr(efi_boot_services, \ - boottime, efi_system_table())->mixed_mode.f, \ - __VA_ARGS__)) + : efi64_thunk(efi_table_attr(efi_system_table(), \ + boottime)->mixed_mode.f, __VA_ARGS__))#define efi_call_runtime (f, ...) \ (efi_is_native() \ ? efi_system_table()->runtime->f(__VA_ARGS__) \ - : efi64_thunk(efi_table_attr(efi_runtime_services, \ - runtime, efi_system_table())->mixed_mode.f, \ - __VA_ARGS__)) + : efi64_thunk(efi_table_attr(efi_system_table(), \ + runtime)->mixed_mode.f, __VA_ARGS__))extern bool efi_reboot_required (void );extern bool efi_is_table_address (unsigned long phys_addr);
drivers/firmware/efi/libstub/efi-stub-helper.c +4 -7
@@ -933,17 +933,15 @@ efi_status_t efi_exit_boot_services(void *handle,void *get_efi_config_table (efi_guid_t guid) { -unsigned long tables =efi_table_attr (efi_system_table, tables, -efi_system_table ()); -int nr_tables =efi_table_attr (efi_system_table, nr_tables, -efi_system_table ()); +unsigned long tables =efi_table_attr (efi_system_table (), tables); +int nr_tables =efi_table_attr (efi_system_table (), nr_tables);int i;for (i =0 ; i < nr_tables; i++) {efi_config_table_t *t = (void *)tables;if (efi_guidcmp (t->guid, guid) ==0 ) -return efi_table_attr (efi_config_table, table, t); +return efi_table_attr (t, table); tables +=efi_is_native () ?sizeof (efi_config_table_t) :sizeof (efi_config_table_32_t);
@@ -953,7 +951,6 @@ void *get_efi_config_table(efi_guid_t guid)void efi_char16_printk (efi_char16_t *str) { -efi_call_proto (efi_table_attr (efi_system_table, con_out, -efi_system_table ()), +efi_call_proto (efi_table_attr (efi_system_table (), con_out), output_string, str); }
drivers/firmware/efi/libstub/gop.c +3 -6
@@ -85,9 +85,6 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line, } } -#define efi_gop_attr (table, attr, instance) \ - (efi_table_attr(efi_graphics_output_protocol##table, attr, instance)) -static efi_status_t setup_gop (struct screen_info *si,efi_guid_t *proto,unsigned long size,void **handles) {
@@ -123,9 +120,9 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,if (status ==EFI_SUCCESS ) conout_found = true; - mode = (void *)(unsigned long)efi_gop_attr(, mode, gop); - info = (void *)(unsigned long )efi_gop_attr (_mode, info, mode); - current_fb_base =efi_gop_attr (_mode, frame_buffer_base, mode); + mode =efi_table_attr (gop, mode); + info =efi_table_attr (mode, info); + current_fb_base =efi_table_attr (mode, frame_buffer_base);if ((!first_gop || conout_found) && info->pixel_format !=PIXEL_BLT_ONLY ) {
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 23/25 efi/libstub: rename efi_call_early/_runtime macros to be more intuitive
In reply to Ard BiesheuvelThe macros efi_call_early and efi_call_runtime are used to call EFI boot services and runtime services, respectively. However, the naming is confusing, given that the early vs runtime distinction may suggest that these are used for calling the same set of services either early or late (== at runtime), while in reality, the sets of services they can be used with are completely disjoint, and efi_call_runtime is also only usable in 'early' code.
So do a global sweep to replace all occurrences with efi_bs_call or efi_rt_call, respectively, where BS and RT match the idiom used by the UEFI spec to refer to boot time or runtime services.
While at it, use 'func' as the macro parameter name for the function pointers, which is less likely to collide and cause weird build errors.
--- arch/arm/include/asm/efi.h | 6 +- arch/arm64/include/asm/efi.h | 6 +- arch/x86/boot/compressed/eboot.c | 77 +++++++++---------- arch/x86/include/asm/efi.h | 12 +-- drivers/firmware/efi/libstub/arm-stub.c | 13 ++-- drivers/firmware/efi/libstub/arm32-stub.c | 30 ++++---- drivers/firmware/efi/libstub/arm64-stub.c | 8 +- .../firmware/efi/libstub/efi-stub-helper.c | 70 ++++++++--------- drivers/firmware/efi/libstub/efistub.h | 8 ++ drivers/firmware/efi/libstub/gop.c | 17 ++-- drivers/firmware/efi/libstub/random.c | 23 +++--- drivers/firmware/efi/libstub/secureboot.c | 5 -- drivers/firmware/efi/libstub/tpm.c | 25 ++---- 13 files changed, 137 insertions(+), 163 deletions(-)
arch/arm/include/asm/efi.h +3 -3
@@ -50,9 +50,9 @@ void efi_virtmap_unload(void);/* arch specific definitions used by the stub code */ -#define efi_call_early (f, ...) efi_system_table()->boottime->f(__VA_ARGS__) -#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__) -#define efi_is_native () (true) +#define efi_bs_call (func, ...) efi_system_table()->boottime->func(__VA_ARGS__) +#define efi_rt_call (func, ...) efi_system_table()->runtime->func(__VA_ARGS__) +#define efi_is_native () (true)#define efi_table_attr (inst, attr) (inst->attr)
arch/arm64/include/asm/efi.h +3 -3
@@ -93,9 +93,9 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,return (image_addr & ~(SZ_1G -1UL )) + (1UL << (VA_BITS_MIN -1 )); } -#define efi_call_early (f, ...) efi_system_table()->boottime->f(__VA_ARGS__) -#define efi_call_runtime (f, ...) efi_system_table()->runtime->f(__VA_ARGS__) -#define efi_is_native () (true) +#define efi_bs_call (func, ...) efi_system_table()->boottime->func(__VA_ARGS__) +#define efi_rt_call (func, ...) efi_system_table()->runtime->func(__VA_ARGS__) +#define efi_is_native () (true)#define efi_table_attr (inst, attr) (inst->attr)
arch/x86/boot/compressed/eboot.c +35 -42
191 lines not on this page · raw message
arch/x86/include/asm/efi.h +6 -6
@@ -227,17 +227,17 @@ static inline bool efi_is_native(void) ? inst->func(inst, ##__VA_ARGS__) \ : efi64_thunk(inst->mixed_mode.func, inst, ##__VA_ARGS__)) -#define efi_call_early (f, ...) \ +#define efi_bs_call (func, ...) \ (efi_is_native() \ - ? efi_system_table()->boottime->f(__VA_ARGS__) \ + ? efi_system_table()->boottime->func(__VA_ARGS__) \ : efi64_thunk(efi_table_attr(efi_system_table(), \ - boottime)->mixed_mode.f, __VA_ARGS__)) + boottime)->mixed_mode.func, __VA_ARGS__)) -#define efi_call_runtime (f, ...) \ +#define efi_rt_call (func, ...) \ (efi_is_native() \ - ? efi_system_table()->runtime->f(__VA_ARGS__) \ + ? efi_system_table()->runtime->func(__VA_ARGS__) \ : efi64_thunk(efi_table_attr(efi_system_table(), \ - runtime)->mixed_mode.f, __VA_ARGS__)) + runtime)->mixed_mode.func, __VA_ARGS__))extern bool efi_reboot_required (void );extern bool efi_is_table_address (unsigned long phys_addr);
drivers/firmware/efi/libstub/arm-stub.c +6 -7
@@ -53,8 +53,8 @@ static struct screen_info *setup_graphics(void)struct screen_info *si =NULL ; size =0 ; - status =efi_call_early (locate_handle,EFI_LOCATE_BY_PROTOCOL , - &gop_proto,NULL , &size, gop_handle); + status =efi_bs_call (locate_handle,EFI_LOCATE_BY_PROTOCOL , + &gop_proto,NULL , &size, gop_handle);if (status ==EFI_BUFFER_TOO_SMALL ) { si =alloc_screen_info ();if (!si)
@@ -70,8 +70,8 @@ void install_memreserve_table(void)efi_guid_t memreserve_table_guid =LINUX_EFI_MEMRESERVE_TABLE_GUID ;efi_status_t status; - status =efi_call_early (allocate_pool,EFI_LOADER_DATA ,sizeof (*rsv), - (void **)&rsv); + status =efi_bs_call (allocate_pool,EFI_LOADER_DATA ,sizeof (*rsv), + (void **)&rsv);if (status !=EFI_SUCCESS ) {pr_efi_err ("Failed to allocate memreserve entry!\n" );return ;
@@ -81,9 +81,8 @@ void install_memreserve_table(void) rsv->size =0 ;atomic_set (&rsv->count,0 ); - status =efi_call_early (install_configuration_table, - &memreserve_table_guid, - rsv); + status =efi_bs_call (install_configuration_table, + &memreserve_table_guid, rsv);if (status !=EFI_SUCCESS )pr_efi_err ("Failed to install memreserve config table!\n" ); }
drivers/firmware/efi/libstub/arm32-stub.c +15 -15
@@ -37,18 +37,18 @@ struct screen_info *alloc_screen_info(void)* its contents while we hand over to the kernel proper from the * decompressor. */ - status =efi_call_early (allocate_pool,EFI_RUNTIME_SERVICES_DATA , -sizeof (*si), (void **)&si); + status =efi_bs_call (allocate_pool,EFI_RUNTIME_SERVICES_DATA , +sizeof (*si), (void **)&si);if (status !=EFI_SUCCESS )return NULL ; - status =efi_call_early (install_configuration_table, - &screen_info_guid, si); + status =efi_bs_call (install_configuration_table, + &screen_info_guid, si);if (status ==EFI_SUCCESS )return si; -efi_call_early (free_pool, si); +efi_bs_call (free_pool, si);return NULL ; }
@@ -57,8 +57,8 @@ void free_screen_info(struct screen_info *si)if (!si)return ; -efi_call_early (install_configuration_table, &screen_info_guid,NULL ); -efi_call_early (free_pool, si); +efi_bs_call (install_configuration_table, &screen_info_guid,NULL ); +efi_bs_call (free_pool, si); } static efi_status_t reserve_kernel_base(unsigned long dram_base,
@@ -91,8 +91,8 @@ static efi_status_t reserve_kernel_base(unsigned long dram_base,*/ alloc_addr = dram_base +MAX_UNCOMP_KERNEL_SIZE ; nr_pages =MAX_UNCOMP_KERNEL_SIZE /EFI_PAGE_SIZE ; - status =efi_call_early (allocate_pages,EFI_ALLOCATE_MAX_ADDRESS , -EFI_BOOT_SERVICES_DATA , nr_pages, &alloc_addr); + status =efi_bs_call (allocate_pages,EFI_ALLOCATE_MAX_ADDRESS , +EFI_BOOT_SERVICES_DATA , nr_pages, &alloc_addr);if (status ==EFI_SUCCESS ) {if (alloc_addr == dram_base) { *reserve_addr = alloc_addr;
@@ -156,11 +156,11 @@ static efi_status_t reserve_kernel_base(unsigned long dram_base, start =max (start, (u64 )dram_base); end =min (end, (u64 )dram_base +MAX_UNCOMP_KERNEL_SIZE ); - status =efi_call_early (allocate_pages, -EFI_ALLOCATE_ADDRESS , -EFI_LOADER_DATA , - (end - start) /EFI_PAGE_SIZE , - &start); + status =efi_bs_call (allocate_pages, +EFI_ALLOCATE_ADDRESS , +EFI_LOADER_DATA , + (end - start) /EFI_PAGE_SIZE , + &start);if (status !=EFI_SUCCESS ) {pr_efi_err ("reserve_kernel_base(): alloc failed.\n" ); goto out;
@@ -185,7 +185,7 @@ static efi_status_t reserve_kernel_base(unsigned long dram_base, status =EFI_SUCCESS ; out: -efi_call_early (free_pool, memory_map); +efi_bs_call (free_pool, memory_map);return status; }
drivers/firmware/efi/libstub/arm64-stub.c +4 -4
@@ -129,10 +129,10 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, *image_addr = *reserve_addr = preferred_offset; *reserve_size =round_up (kernel_memsize,EFI_ALLOC_ALIGN ); - status =efi_call_early (allocate_pages,EFI_ALLOCATE_ADDRESS , -EFI_LOADER_DATA , - *reserve_size /EFI_PAGE_SIZE , - (efi_physical_addr_t *)reserve_addr); + status =efi_bs_call (allocate_pages,EFI_ALLOCATE_ADDRESS , +EFI_LOADER_DATA , + *reserve_size /EFI_PAGE_SIZE , + (efi_physical_addr_t *)reserve_addr); }if (status !=EFI_SUCCESS ) {
drivers/firmware/efi/libstub/efi-stub-helper.c +33 -37
190 lines not on this page · raw message
drivers/firmware/efi/libstub/efistub.h +8 -0
@@ -76,4 +76,12 @@ void *get_efi_config_table(efi_guid_t guid); fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var))#endif +#define get_efi_var (name, vendor, ...) \ + efi_rt_call(get_variable, (efi_char16_t *)(name), \ + (efi_guid_t *)(vendor), __VA_ARGS__) + +#define set_efi_var (name, vendor, ...) \ + efi_rt_call(set_variable, (efi_char16_t *)(name), \ + (efi_guid_t *)(vendor), __VA_ARGS__) +#endif
drivers/firmware/efi/libstub/gop.c +7 -10
@@ -110,13 +110,11 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,void *dummy =NULL ;efi_physical_addr_t current_fb_base; - status =efi_call_early (handle_protocol, h, - proto, (void **)&gop); + status =efi_bs_call (handle_protocol, h, proto, (void **)&gop);if (status !=EFI_SUCCESS )continue ; - status =efi_call_early (handle_protocol, h, - &conout_proto, &dummy); + status =efi_bs_call (handle_protocol, h, &conout_proto, &dummy);if (status ==EFI_SUCCESS ) conout_found = true;
@@ -187,20 +185,19 @@ efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,efi_status_t status;void **gop_handle =NULL ; - status =efi_call_early (allocate_pool,EFI_LOADER_DATA , - size, (void **)&gop_handle); + status =efi_bs_call (allocate_pool,EFI_LOADER_DATA , size, + (void **)&gop_handle);if (status !=EFI_SUCCESS )return status; - status =efi_call_early (locate_handle, -EFI_LOCATE_BY_PROTOCOL , - proto,NULL , &size, gop_handle); + status =efi_bs_call (locate_handle,EFI_LOCATE_BY_PROTOCOL , proto,NULL , + &size, gop_handle);if (status !=EFI_SUCCESS ) goto free_handle; status =setup_gop (si, proto, size, gop_handle); free_handle: -efi_call_early (free_pool, gop_handle); +efi_bs_call (free_pool, gop_handle);return status; }
drivers/firmware/efi/libstub/random.c +10 -13
@@ -32,8 +32,7 @@ efi_status_t efi_get_random_bytes(unsigned long size, u8 *out)efi_status_t status;efi_rng_protocol_t *rng =NULL ; - status =efi_call_early (locate_protocol, &rng_proto,NULL , - (void **)&rng); + status =efi_bs_call (locate_protocol, &rng_proto,NULL , (void **)&rng);if (status !=EFI_SUCCESS )return status;
@@ -141,14 +140,14 @@ efi_status_t efi_random_alloc(unsigned long size, target =round_up (md->phys_addr, align) + target_slot * align; pages =round_up (size,EFI_PAGE_SIZE ) /EFI_PAGE_SIZE ; - status =efi_call_early (allocate_pages,EFI_ALLOCATE_ADDRESS , -EFI_LOADER_DATA , pages, &target); + status =efi_bs_call (allocate_pages,EFI_ALLOCATE_ADDRESS , +EFI_LOADER_DATA , pages, &target);if (status ==EFI_SUCCESS ) *addr = target;break ; } -efi_call_early (free_pool, memory_map); +efi_bs_call (free_pool, memory_map);return status; }
@@ -162,14 +161,13 @@ efi_status_t efi_random_get_seed(void)struct linux_efi_random_seed *seed =NULL ;efi_status_t status; - status =efi_call_early (locate_protocol, &rng_proto,NULL , - (void **)&rng); + status =efi_bs_call (locate_protocol, &rng_proto,NULL , (void **)&rng);if (status !=EFI_SUCCESS )return status; - status =efi_call_early (allocate_pool,EFI_RUNTIME_SERVICES_DATA , -sizeof (*seed) +EFI_RANDOM_SEED_SIZE , - (void **)&seed); + status =efi_bs_call (allocate_pool,EFI_RUNTIME_SERVICES_DATA , +sizeof (*seed) +EFI_RANDOM_SEED_SIZE , + (void **)&seed);if (status !=EFI_SUCCESS )return status;
@@ -188,14 +186,13 @@ efi_status_t efi_random_get_seed(void) goto err_freepool; seed->size =EFI_RANDOM_SEED_SIZE ; - status =efi_call_early (install_configuration_table, &rng_table_guid, - seed); + status =efi_bs_call (install_configuration_table, &rng_table_guid, seed);if (status !=EFI_SUCCESS ) goto err_freepool;return EFI_SUCCESS ; err_freepool: -efi_call_early (free_pool, seed); +efi_bs_call (free_pool, seed);return status; }
drivers/firmware/efi/libstub/secureboot.c +0 -5
@@ -21,11 +21,6 @@ static const efi_char16_t efi_SetupMode_name[] = L"SetupMode";static const efi_guid_t shim_guid =EFI_SHIM_LOCK_GUID ;static const efi_char16_t shim_MokSBState_name[] =L"MokSBState" ; -#define get_efi_var (name, vendor, ...) \ - efi_call_runtime(get_variable, \ - (efi_char16_t *)(name), (efi_guid_t *)(vendor), \ - __VA_ARGS__); -/* * Determine whether we're in secure boot mode. *
drivers/firmware/efi/libstub/tpm.c +7 -18
@@ -20,16 +20,6 @@ static const efi_char16_t efi_MemoryOverWriteRequest_name[] =#define MEMORY_ONLY_RESET_CONTROL_GUID \ EFI_GUID(0xe20939be, 0x32d4, 0x41be, 0xa1, 0x50, 0x89, 0x7f, 0x85, 0xd4, 0x98, 0x29) -#define get_efi_var (name, vendor, ...) \ - efi_call_runtime(get_variable, \ - (efi_char16_t *)(name), (efi_guid_t *)(vendor), \ - __VA_ARGS__) - -#define set_efi_var (name, vendor, ...) \ - efi_call_runtime(set_variable, \ - (efi_char16_t *)(name), (efi_guid_t *)(vendor), \ - __VA_ARGS__) -/* * Enable reboot attack mitigation. This requests that the firmware clear the * RAM on next reboot before proceeding with boot, ensuring that any secrets
@@ -72,8 +62,8 @@ void efi_retrieve_tpm2_eventlog(void)efi_tcg2_protocol_t *tcg2_protocol =NULL ;int final_events_size =0 ; - status =efi_call_early (locate_protocol, &tcg2_guid,NULL , - (void **)&tcg2_protocol); + status =efi_bs_call (locate_protocol, &tcg2_guid,NULL , + (void **)&tcg2_protocol);if (status !=EFI_SUCCESS )return ;
@@ -125,9 +115,8 @@ void efi_retrieve_tpm2_eventlog(void) }/* Allocate space for the logs and copy them. */ - status =efi_call_early (allocate_pool,EFI_LOADER_DATA , -sizeof (*log_tbl) + log_size, - (void **) &log_tbl); + status =efi_bs_call (allocate_pool,EFI_LOADER_DATA , +sizeof (*log_tbl) + log_size, (void **)&log_tbl);if (status !=EFI_SUCCESS ) {efi_printk ("Unable to allocate memory for event log\n" );
@@ -166,12 +155,12 @@ void efi_retrieve_tpm2_eventlog(void) log_tbl->version = version;memcpy (log_tbl->log, (void *) first_entry_addr, log_size); - status =efi_call_early (install_configuration_table, - &linux_eventlog_guid, log_tbl); + status =efi_bs_call (install_configuration_table, + &linux_eventlog_guid, log_tbl);if (status !=EFI_SUCCESS ) goto err_free;return ; err_free: -efi_call_early (free_pool, log_tbl); +efi_bs_call (free_pool, log_tbl); }
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 24/25 efi/libstub: tidy up types and names of global cmdline variables
In reply to Ard BiesheuvelDrop leading underscores and use bool not int for true/false variables set on the command line.
--- drivers/firmware/efi/libstub/arm-stub.c | 2 +- .../firmware/efi/libstub/efi-stub-helper.c | 36 +++++++++---------- drivers/firmware/efi/libstub/efistub.h | 12 +++++-- 3 files changed, 28 insertions(+), 22 deletions(-)
drivers/firmware/efi/libstub/arm-stub.c +1 -1
@@ -37,7 +37,7 @@static u64 virtmap_base =EFI_RT_VIRTUAL_BASE ; -static efi_system_table_t *__section(.data) sys_table; +static efi_system_table_t *__efistub_global sys_table;__pure efi_system_table_t *efi_system_table (void ) {
drivers/firmware/efi/libstub/efi-stub-helper.c +18 -18
@@ -27,24 +27,24 @@*/ #define EFI_READ_CHUNK_SIZE (1024 * 1024) -static unsigned long __chunk_size =EFI_READ_CHUNK_SIZE ; +static unsigned long efi_chunk_size =EFI_READ_CHUNK_SIZE ; -static int __section(.data) __nokaslr; -static int __section(.data) __quiet; -static int __section(.data) __novamap; -static bool __section(.data) efi_nosoftreserve; +static bool __efistub_global efi_nokaslr; +static bool __efistub_global efi_quiet; +static bool __efistub_global efi_novamap; +static bool __efistub_global efi_nosoftreserve; -int __pure nokaslr(void) +bool __pure nokaslr (void ) { -return __nokaslr; +return efi_nokaslr; } -int __pure is_quiet (void ) +bool __pure is_quiet (void ) { -return __quiet; +return efi_quiet; } -int __pure novamap (void ) +bool __pure novamap (void ) { -return __novamap; +return efi_novamap; }bool __pure __efi_soft_reserve_enabled (void ) {
@@ -455,11 +455,11 @@ efi_status_t efi_parse_options(char const *cmdline) str =strstr (cmdline,"nokaslr" );if (str == cmdline || (str && str > cmdline && *(str -1 ) ==' ' )) - __nokaslr =1 ; + efi_nokaslr = true; str =strstr (cmdline,"quiet" );if (str == cmdline || (str && str > cmdline && *(str -1 ) ==' ' )) - __quiet =1 ; + efi_quiet = true;/* * If no EFI parameters were specified on the cmdline we've got
@@ -479,18 +479,18 @@ efi_status_t efi_parse_options(char const *cmdline)while (*str && *str !=' ' ) {if (!strncmp (str,"nochunk" ,7 )) { str +=strlen ("nochunk" ); - __chunk_size =-1UL ; + efi_chunk_size =-1UL ; }if (!strncmp (str,"novamap" ,7 )) { str +=strlen ("novamap" ); - __novamap =1 ; + efi_novamap = true; }if (IS_ENABLED (CONFIG_EFI_SOFT_RESERVE ) && !strncmp (str,"nosoftreserve" ,7 )) { str +=strlen ("nosoftreserve" ); - efi_nosoftreserve =1 ; + efi_nosoftreserve = true; }/* Group words together, delimited by "," */
@@ -644,8 +644,8 @@ efi_status_t handle_cmdline_files(efi_loaded_image_t *image,while (size) {unsigned long chunksize; -if (IS_ENABLED (CONFIG_X86 ) && size > __chunk_size) - chunksize = __chunk_size; +if (IS_ENABLED (CONFIG_X86 ) && size > efi_chunk_size) + chunksize = efi_chunk_size;else chunksize = size;
drivers/firmware/efi/libstub/efistub.h +9 -3
@@ -25,9 +25,15 @@#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE#endif -extern int __pure nokaslr (void ); -extern int __pure is_quiet (void ); -extern int __pure novamap (void ); +#ifdef CONFIG_ARM +#define __efistub_global __section(.data) +#else +#define __efistub_global +#endif + +extern bool __pure nokaslr (void ); +extern bool __pure is_quiet (void ); +extern bool __pure novamap (void );extern __pure efi_system_table_t *efi_system_table (void );
Signature · 1 line
2.20.1
Ard Biesheuvel
maintainerPATCH 25/25 efi/libstub/x86: avoid globals to store context during mixed mode calls
In reply to Ard BiesheuvelInstead of storing the return address in a global variable when calling a 32-bit EFI service from the 64-bit stub, avoid the indirection via efi_exit32, and take the return address from the stack.
--- arch/x86/boot/compressed/efi_thunk_64.S | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-)
arch/x86/boot/compressed/efi_thunk_64.S +3 -14
@@ -10,7 +10,7 @@ * needs to be able to service interrupts. * * On the plus side, we don't have to worry about mangling 64-bit - * addresses into 32-bits because we're executing with an identify + * addresses into 32-bits because we're executing with an identity * mapped pagetable and haven't transitioned to 64-bit virtual addresses * yet. */
@@ -28,7 +28,7 @@ SYM_FUNC_START(efi64_thunk) push %rbx subq $8, %rsp - leaq efi_exit32(%rip), %rax + leaq 1f(%rip), %rax movl %eax, 4(%rsp) leaq efi_gdt64(%rip), %rax movl %eax, (%rsp)
@@ -55,9 +55,6 @@ SYM_FUNC_START(efi64_thunk) sgdt save_gdt(%rip) - leaq 1f(%rip), %rbx - movq %rbx, func_rt_ptr(%rip) - /* * Switch to gdt with 32-bit segments. This is the firmware GDT * that was installed when the kernel started executing. This
@@ -72,6 +69,7 @@ SYM_FUNC_START(efi64_thunk) lretq 1: addq $32, %rsp + movq %rdi, %rax lgdt save_gdt(%rip)
@@ -99,13 +97,6 @@ SYM_FUNC_START(efi64_thunk) ret SYM_FUNC_END(efi64_thunk) -SYM_FUNC_START_LOCAL(efi_exit32) - movq func_rt_ptr(%rip), %rax - push %rax - mov %rdi, %rax - ret -SYM_FUNC_END(efi_exit32) - .code32 /* * EFI service pointer must be in %edi.
@@ -186,8 +177,6 @@ SYM_DATA_START_LOCAL(save_gdt) .quad 0 SYM_DATA_END(save_gdt) -SYM_DATA_LOCAL(func_rt_ptr, .quad 0) - SYM_DATA_START(efi_gdt64) .word efi_gdt64_end - efi_gdt64 .long 0 /* Filled out by user */
Signature · 1 line
2.20.1
Ingo Molnar
AppliedQuoted 97 lines · Ard Biesheuvel
Ingo, Thomas,
Please consider the pull request below. I am anticipating some more changes for this cycle, but it would be good to get these queued up and into -next sooner rather than later, since there is some risk of breakage even though the changes have been tested on a variety of hardware.
If you have the stomach to go over them in detail: please take into account that these patches modify the same
efi_call_xxx()macro definitions multiple times, in order to be bisectable, so please consider the end result first before commenting on coding style of the intermediate changes.NOTE: this series depends on the efi-urgent PR that I just sent out, so please merge tip/efi/urgent into tip/efi/core before applying the changes below.
Thanks and happy Christmas,
Ard.The following changes since commit
77217fcc8e04f27127b32825376ed508705fd946:x86/efistub: disable paging at mixed mode entry (2019-12-23 16:25:21 +0100)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.gittags/efi-nextfor you to fetch changes up to
c51a0735389b92cb0025137af0034773773ad7da:efi/libstub/x86: avoid globals to store context during mixed mode calls (2019-12-24 15:32:22 +0100)
----------------------------------------------------------------
EFI changes for v5.6:
- Cleanup of the GOP [graphics output] handling code in the EFI stub (Arvind)
- Inspired by the above, and with a little bit of Arvind's help, a complete refactor of the mixed mode handling in the x86 EFI stub, getting rid of a lot of ugly and unnecessary wrapping and typecasting. This is a worthwhile cleanup by itself, but it also addresses a recurring issue where stub code often fails to compile on non-x86 because all the casting and thunking via variadic wrapper routines is masking problems in the code.----------------------------------------------------------------
Ard Biesheuvel (21):
efi/libstub: remove unused__efi_call_early()macro efi/x86: renameefi_is_native()toefi_is_mixed()efi/libstub: use a helper to iterate over a EFI handle array efi/libstub: extend native protocol definitions withmixed_modealiases efi/libstub: distinguish between native/mixed not 32/64 bit efi/libstub: drop explicit 32/64-bit protocol definitions efi/libstub: use stricter typing for firmware function pointers efi/libstub: annotate firmware routines as__efiapiefi/libstub/x86: avoid thunking for native firmware calls efi/libstub: avoid protocol wrapper for file I/O routines efi/libstub: get rid of 'sys_table_arg' macro parameter efi/libstub: unify theefi_char16_printkimplementations efi/libstub/x86: drop__efi_early()export andefi_configstruct efi/libstub: dropsys_table_argfrom printk routines efi/libstub: remove 'sys_table_arg' from all function prototypes efi/libstub/x86: work around page freeing issue in mixed mode efi/libstub: drop protocol argument fromefi_call_proto()macro efi/libstub: drop 'table' argument fromefi_table_attr()macro efi/libstub: rename efi_call_early/_runtime macros to be more intuitive efi/libstub: tidy up types and names of global cmdline variables efi/libstub/x86: avoid globals to store context during mixed mode callsArvind Sankar (4):
efi/gop: Remove bogus packed attribute from GOP structures efi/gop: Remove unused typedef
efi/gop: Convert GOP structures to typedef and cleanup some types efi/gop: Unify 32/64-bit functionsarch/arm/include/asm/efi.h | 17 +- arch/arm64/include/asm/efi.h | 16 +- arch/x86/Kconfig | 11 +- arch/x86/boot/compressed/Makefile | 2 +- arch/x86/boot/compressed/eboot.c | 290 +++++----- arch/x86/boot/compressed/eboot.h | 30 +- arch/x86/boot/compressed/efi_stub_32.S | 87 --- arch/x86/boot/compressed/efi_stub_64.S | 5 - arch/x86/boot/compressed/efi_thunk_64.S | 17 +- arch/x86/boot/compressed/head_32.S | 64 +-- arch/x86/boot/compressed/head_64.S | 97 +--- arch/x86/include/asm/efi.h | 77 ++- arch/x86/platform/efi/efi.c | 12 +- arch/x86/platform/efi/efi_64.c | 6 +- arch/x86/platform/efi/quirks.c | 2 +- arch/x86/xen/efi.c | 2 +- drivers/firmware/efi/libstub/arm-stub.c | 110 ++-- drivers/firmware/efi/libstub/arm32-stub.c | 70 ++- drivers/firmware/efi/libstub/arm64-stub.c | 32 +- drivers/firmware/efi/libstub/efi-stub-helper.c | 278 +++++----- drivers/firmware/efi/libstub/efistub.h | 48 +- drivers/firmware/efi/libstub/fdt.c | 53 +-
Quoted 8 lines
drivers/firmware/efi/libstub/gop.c | 163 +----- drivers/firmware/efi/libstub/random.c | 77 ++- drivers/firmware/efi/libstub/secureboot.c | 11 +- drivers/firmware/efi/libstub/tpm.c | 48 +- include/linux/efi.h | 730 +++++++++++-------------- 27 files changed, 914 insertions(+), 1441 deletions(-) delete mode 100644 arch/x86/boot/compressed/efi_stub_32.S delete mode 100644 arch/x86/boot/compressed/efi_stub_64.S
Applied to tip:efi/core, and merry Christmas to you too!
Ingo