This is to prevent #DB interception on SEV-ES VM with enabled DebugSwap feature, more details in 3/5.
The corresponding Linux change (HV and VM) went upstream long time ago: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e221804dad4e https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f85fbe836e And then I dropped the ball, sorry. The previous conversation (more than a year ago) is here: https://edk2.groups.io/g/devel/message/96808 This failed CI though (figuring out this not-that-trivial Uncrustify guy now): https://dev.azure.com/tianocore/edk2-ci/_build/results?buildId=123642&view=logs&j=ec42d809-3c3b-54a9-276c-e54a8b9aaee9&t=bd91c6c3-6d75-5ede-7b63-5767cf827334 This is based on sha1 6780b3aba086 Abner Chang "Maintainers: AMD as SPI driver stack maintainer". Please comment. Thanks. Alexey Kardashevskiy (5): MdePkg/Register/Amd: Define all bits from MSR_SEV_STATUS_REGISTER MdePkg: Add AMD SEV features to PcdConfidentialComputingGuestAttr OvmfPkg: Add AMD SEV-ES DebugSwap feature support UefiCpuPkg: Add AMD SEV-ES features support OvmfPkf: Enable AMD SEV-ES DebugSwap for DXE MdePkg/Include/ConfidentialComputingGuestAttr.h | 16 +++++- MdePkg/Include/Register/Amd/Fam17Msr.h | 57 +++++++++++++++++++- OvmfPkg/Include/Library/MemEncryptSevLib.h | 12 +++++ OvmfPkg/Library/BaseMemEncryptSevLib/DxeMemEncryptSevLibInternal.c | 25 +++++++-- OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c | 19 +++++++ OvmfPkg/Library/BaseMemEncryptSevLib/SecMemEncryptSevLibInternal.c | 20 +++++++ OvmfPkg/Library/CcExitLib/CcExitVcHandler.c | 8 +++ OvmfPkg/PlatformPei/AmdSev.c | 13 +++-- UefiCpuPkg/Library/MpInitLib/MpLib.c | 10 ++-- 9 files changed, 168 insertions(+), 12 deletions(-) -- 2.41.0 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#118088): https://edk2.groups.io/g/devel/message/118088 Mute This Topic: https://groups.io/mt/105668050/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
