EFI changes for v4.21

Linus,

Please pull the latest efi-core-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git efi-core-for-linus

# HEAD: 1debf0958fa27b7c469dbf22754929ec59a7c0e7 x86/efi: Don't unmap EFI boot services code/data regions for EFI_OLD_MEMMAP and EFI_MIXED_MODE

The main changes in this cycle were:

- Allocate the E820 buffer before doing the GetMemoryMap/ExitBootServices dance so we don't run out of space

- Clear EFI boot services mappings when freeing the memory

- Harden efivars against callers that invoke it on non-EFI boots

- Reduce the number of memblock reservations resulting from extensive use of the new efi_mem_reserve_persistent() API

- Other assorted fixes and cleanups.

Thanks,

Ingo

------------------>
Ard Biesheuvel (2):
efi: Permit multiple entries in persistent memreserve data structure
efi: Reduce the amount of memblock reservations for persistent allocations

Arend van Spriel (1):
firmware/efi: Add NULL pointer checks in efivars API functions

Julien Thierry (2):
efi/fdt: Indentation fix
efi/fdt: Simplify the get_fdt() flow

Nathan Chancellor (1):

      efi/libstub: Disable some warnings for x86{,_64}

Sai Praneeth Prakhya (4):
x86/mm/pageattr: Introduce helper function to unmap EFI boot services
x86/efi: Unmap EFI boot services code/data regions from efi_pgd
x86/efi: Move efi_<reserve/free>_boot_services() to arch/x86
x86/efi: Don't unmap EFI boot services code/data regions for EFI_OLD_MEMMAP and EFI_MIXED_MODE

 arch/x86/include/asm/efi.h              |  2 +
 arch/x86/include/asm/pgtable_types.h    |  8 ++-
 arch/x86/mm/pageattr.c                  | 40 ++++++++++++-
 arch/x86/platform/efi/efi.c             |  2 +
 arch/x86/platform/efi/quirks.c          | 41 ++++++++++++++
 drivers/firmware/efi/efi.c              | 54 +++++++++++++-----
 drivers/firmware/efi/libstub/Makefile   |  5 +-
 drivers/firmware/efi/libstub/arm-stub.c |  2 +-
 drivers/firmware/efi/libstub/fdt.c      | 30 +++++-----
 drivers/firmware/efi/vars.c             | 99 ++++++++++++++++++++++++++-------
 include/linux/efi.h                     | 19 +++++--
 init/main.c                             |  4 --
 12 files changed, 242 insertions(+), 64 deletions(-)