Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: ce4c76e46d52e24551f4986bded4c9b764502200
https://github.com/tianocore/edk2/commit/ce4c76e46d52e24551f4986bded4c9b764502200
Author: Gerd Hoffmann <[email protected]>
Date: 2024-06-26 (Wed, 26 Jun 2024)
Changed paths:
M OvmfPkg/Bhyve/PlatformPei/MemDetect.c
M OvmfPkg/IntelTdx/Sec/SecMain.c
M OvmfPkg/Library/PlatformInitLib/MemDetect.c
M OvmfPkg/Sec/SecMain.c
Log Message:
-----------
OvmfPkg/Sec: Setup MTRR early in the boot process.
Specifically before running lzma uncompress of the main firmware volume.
This is needed to make sure caching is enabled, otherwise the uncompress
can be extremely slow.
Adapt the ASSERTs and MTRR setup in PlatformInitLib to the changes.
Background: Depending on virtual machine configuration kvm may uses EPT
memory types to apply guest MTRR settings. In case MTRRs are disabled
kvm will use the uncachable memory type for all mappings. The
vmx_get_mt_mask() function in the linux kernel handles this and can be
found here:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/x86/kvm/vmx/vmx.c?h=v6.7.1#n7580
In most VM configurations kvm uses MTRR_TYPE_WRBACK unconditionally. In
case the VM has a mdev device assigned that is not the case though.
Before commit e8aa4c6546ad ("UefiCpuPkg/ResetVector: Cache Disable
should not be set by default in CR0") kvm also ended up using
MTRR_TYPE_WRBACK due to KVM_X86_QUIRK_CD_NW_CLEARED. After that commit
kvm evaluates guest mtrr settings, which why setting up MTRRs early is
important now.
Signed-off-by: Gerd Hoffmann <[email protected]>
Commit: 5bef25dca4119ae9bd537480d703575ad166723a
https://github.com/tianocore/edk2/commit/5bef25dca4119ae9bd537480d703575ad166723a
Author: Gerd Hoffmann <[email protected]>
Date: 2024-06-26 (Wed, 26 Jun 2024)
Changed paths:
M MdePkg/Include/Register/Intel/ArchitecturalMsr.h
Log Message:
-----------
MdePkg/ArchitecturalMsr.h: add #defines for MTRR cache types
Signed-off-by: Gerd Hoffmann <[email protected]>
Commit: 71e6cc8dad2de85512de2fdd6439ae2ebada295d
https://github.com/tianocore/edk2/commit/71e6cc8dad2de85512de2fdd6439ae2ebada295d
Author: Gerd Hoffmann <[email protected]>
Date: 2024-06-26 (Wed, 26 Jun 2024)
Changed paths:
M UefiCpuPkg/Include/Library/MtrrLib.h
Log Message:
-----------
UefiCpuPkg/MtrrLib.h: use cache type #defines from ArchitecturalMsr.h
Signed-off-by: Gerd Hoffmann <[email protected]>
Commit: 78bccfec9ce5082499db035270e7998d5330d75c
https://github.com/tianocore/edk2/commit/78bccfec9ce5082499db035270e7998d5330d75c
Author: Gerd Hoffmann <[email protected]>
Date: 2024-06-26 (Wed, 26 Jun 2024)
Changed paths:
M OvmfPkg/IntelTdx/Sec/SecMain.c
M OvmfPkg/Sec/SecMain.c
Log Message:
-----------
OvmfPkg/Sec: use cache type #defines from ArchitecturalMsr.h
Signed-off-by: Gerd Hoffmann <[email protected]>
Compare: https://github.com/tianocore/edk2/compare/e21bfae345f9...78bccfec9ce5
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