RFC x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv

From: Tianyu Lan <[email protected]>

This patchset is to add AMD sev-snp enlightened guest support on hyperv. Hyperv uses Linux direct boot mode to boot up Linux kernel and so it needs to pvalidate system memory by itself.

In hyperv case, there is no boot loader and so cc blob is prepared by hypervisor. In this series, hypervisor set the cc blob address directly into boot parameter of Linux kernel. If the magic number on cc blob address is valid, kernel will read cc blob.

Shared memory between guests and hypervisor should be decrypted and zero memory after decrypt memory. The data in the target address. It maybe smearedto avoid smearing data.

Introduce #HV exception support in AMD sev snp code and #HV handler.

Tianyu Lan (17):
x86/boot: Check boot param's cc_blob_address for direct boot mode x86/sev: Pvalidate memory gab for decompressing kernel x86/hyperv: Add sev-snp enlightened guest specific config x86/hyperv: apic change for sev-snp enlightened guest x86/hyperv: Decrypt hv vp assist page in sev-snp enlightened guest x86/hyperv: Get Virtual Trust Level via hvcall x86/hyperv: Use vmmcall to implement hvcall in sev-snp enlightened
guest
clocksource: hyper-v: decrypt hyperv tsc page in sev-snp enlightened
guest
x86/hyperv: decrypt vmbus pages for sev-snp enlightened guest x86/hyperv: set target vtl in the vmbus init message
drivers: hv: Decrypt percpu hvcall input arg page in sev-snp
enlightened guest
Drivers: hv: vmbus: Decrypt vmbus ring buffer
x86/hyperv: Initialize cpu and memory for sev-snp enlightened guest x86/hyperv: Add smp support for sev-snp guest
x86/hyperv: Add hyperv-specific hadling for VMMCALL under SEV-ES x86/sev: Add a #HV exception handler
x86/sev: Initialize #HV doorbell and handle interrupt requests

 arch/x86/boot/compressed/head_64.S    |   8 +
 arch/x86/boot/compressed/sev.c        | 111 +++++++-
 arch/x86/entry/entry_64.S             |  76 +++++
 arch/x86/hyperv/hv_apic.c             |  79 ++++--
 arch/x86/hyperv/hv_init.c             |  47 ++++
 arch/x86/hyperv/ivm.c                 |  12 +-
 arch/x86/include/asm/cpu_entry_area.h |   6 +
 arch/x86/include/asm/idtentry.h       |  39 ++-
 arch/x86/include/asm/irqflags.h       |  19 ++
 arch/x86/include/asm/mem_encrypt.h    |   2 +
 arch/x86/include/asm/mshyperv.h       |  68 +++--
 arch/x86/include/asm/msr-index.h      |   6 +
 arch/x86/include/asm/page_64_types.h  |   1 +
 arch/x86/include/asm/sev.h            |  13 +
 arch/x86/include/asm/svm.h            |  55 +++-
 arch/x86/include/asm/trapnr.h         |   1 +
 arch/x86/include/asm/traps.h          |   1 +
 arch/x86/include/uapi/asm/svm.h       |   4 +
 arch/x86/kernel/cpu/common.c          |   1 +
 arch/x86/kernel/cpu/mshyperv.c        | 267 +++++++++++++++++-
 arch/x86/kernel/dumpstack_64.c        |   9 +-
 arch/x86/kernel/idt.c                 |   1 +
 arch/x86/kernel/sev.c                 | 384 ++++++++++++++++++++++----
 arch/x86/kernel/traps.c               |  50 ++++
 arch/x86/mm/cpu_entry_area.c          |   2 +
 drivers/clocksource/hyperv_timer.c    |   2 +-
 drivers/hv/connection.c               |  14 +
 drivers/hv/hv.c                       |  32 ++-
 drivers/hv/hv_common.c                |  22 ++
 drivers/hv/ring_buffer.c              |   7 +-
 include/asm-generic/hyperv-tlfs.h     |  19 ++
 include/asm-generic/mshyperv.h        |   2 +
 include/linux/hyperv.h                |   4 +-
 33 files changed, 1250 insertions(+), 114 deletions(-)

2.25.1