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UefiCpuPkg: Add AMD SEV-ES features support

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CONFIDENTIAL_COMPUTING_GUEST_ATTR is not a simple SEV level anymore
and includes a feature mask since the previous commit.

Fix AmdMemEncryptionAttrCheck to check the level and feature
correctly and add DebugVirtualization support.

Since the actual feature flag is not set yet, this should cause
no behavioural change.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
---
Changes:
v5:
* "rb" from Tom
This commit is contained in:
Alexey Kardashevskiy 2022-11-30 19:40:48 +11:00 committed by mergify[bot]
parent 9f06feb5d2
commit 63a7152471
1 changed files with 9 additions and 3 deletions
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12
UefiCpuPkg/Library/MpInitLib/MpLib.c
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@ -3196,19 +3196,25 @@ AmdMemEncryptionAttrCheck (
IN CONFIDENTIAL_COMPUTING_GUEST_ATTR Attr
)
{
UINT64 CurrentLevel;
CurrentLevel = CurrentAttr & CCAttrTypeMask;
switch (Attr) {
case CCAttrAmdSev:
//
// SEV is automatically enabled if SEV-ES or SEV-SNP is active.
//
return CurrentAttr >= CCAttrAmdSev;
return CurrentLevel >= CCAttrAmdSev;
case CCAttrAmdSevEs:
//
// SEV-ES is automatically enabled if SEV-SNP is active.
//
return CurrentAttr >= CCAttrAmdSevEs;
return CurrentLevel >= CCAttrAmdSevEs;
case CCAttrAmdSevSnp:
return CurrentAttr == CCAttrAmdSevSnp;
return CurrentLevel == CCAttrAmdSevSnp;
case CCAttrFeatureAmdSevEsDebugVirtualization:
return !!(CurrentAttr & CCAttrFeatureAmdSevEsDebugVirtualization);
default:
return FALSE;
}