From: Wei Hu <[email protected]>
This series adds support for creating and managing AMD SEV-SNP
confidential virtual machines through the Microsoft Hypervisor root
partition driver.
The series adds the required Hyper-V ABI and MSHV UAPI definitions,
hypercall helpers, partition ioctls, capability discovery, processor
feature handling, memory teardown, and crash-dump support.
It also adds the EFI HvLoader handoff required to boot Linux as an MSHV
root partition and corrects SynIC register ownership when the root
partition is itself running nested.
The patches are based on Linux v7.2-rc5.
Testing:
- Built the complete 13-patch series on x86_64.
- Booted Linux as an MSHV root partition with SEV-SNP available.
- Created and booted single-vCPU and four-vCPU SEV-SNP guests with
Cloud Hypervisor.
- Verified SNP memory teardown and panic-time page unlock for kdump.
Functional testing on the development host used an additional local
nested-VMBus interrupt workaround required by that nested environment.
That workaround is not part of this series.
Wei Hu (4):
hyperv: fix hv_input_get_system_property layout for SNP status
mshv: unlock SNP pages on panic for crashdump collection
hyperv: add MSHV Dom0 root-partition boot enablement (EFI HvLoader)
mshv: set up own SynIC registers on a nested root partition
Wei Liu (9):
mshv: add SEV-SNP UAPI definitions
mshv: add SEV-SNP PSP request hypercall
mshv: add SEV-SNP isolated page hypercalls
mshv: wire SEV-SNP partition ioctls
mshv: detect and report SEV-SNP support at init
mshv: default to safe partition CPU features
mshv: accept partial CPU feature banks
mshv: define full processor and xsave feature masks
mshv: unmap SNP memory before state teardown
MAINTAINERS | 2 +
arch/x86/hyperv/hv_init.c | 3 +
arch/x86/include/asm/mshyperv.h | 1 +
arch/x86/include/uapi/asm/setup_data.h | 3 +-
arch/x86/kernel/cpu/mshyperv.c | 80 ++-
drivers/firmware/efi/libstub/Makefile | 7 +
drivers/firmware/efi/libstub/arm64-efi-mshv.c | 41 ++
.../firmware/efi/libstub/efi-mshv-common.c | 136 ++++
drivers/firmware/efi/libstub/efi-mshv.h | 118 +++
drivers/firmware/efi/libstub/x86-efi-mshv.c | 202 ++++++
drivers/firmware/efi/libstub/x86-stub.c | 18 +-
drivers/hv/hv_common.c | 82 +++
drivers/hv/mshv_regions.c | 2 +-
drivers/hv/mshv_root.h | 26 +
drivers/hv/mshv_root_hv_call.c | 171 +++++
drivers/hv/mshv_root_main.c | 679 +++++++++++++++++-
drivers/hv/mshv_synic.c | 16 +-
include/asm-generic/mshyperv.h | 7 +
include/hyperv/hvgdk_mini.h | 31 +
include/hyperv/hvhdk.h | 124 +++-
include/hyperv/hvhdk_mini.h | 56 +-
include/linux/efi.h | 1 +
include/uapi/linux/mshv.h | 58 +-
23 files changed, 1834 insertions(+), 30 deletions(-)
create mode 100644 drivers/firmware/efi/libstub/arm64-efi-mshv.c
create mode 100644 drivers/firmware/efi/libstub/efi-mshv-common.c
create mode 100644 drivers/firmware/efi/libstub/efi-mshv.h
create mode 100644 drivers/firmware/efi/libstub/x86-efi-mshv.c
base-commit: f5098b6bae761e346ebcd9da7f95622c04733cff
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2.43.0
