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UefiCpuPkg: Update AESNI support checking logic 

With correct model CPU, current checking logic will
always execute AsmReadMsr64 operation and then check
ECX.AESNI[bit 25] = 1. Update checking logic to check
ECX.AESNI[bit 25] = 1 first and then do AsmReadMsr64
operation.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bell Song <binx.song@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Song, BinX 2017-12-25 11:11:21 +08:00 committed by Eric Dong
parent a1d1422dd4
commit 9d02c34f04
1 changed files with 11 additions and 9 deletions
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4
UefiCpuPkg/Library/CpuCommonFeaturesLib/Aesni.c
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@ -62,6 +62,7 @@ AesniSupport (
{
MSR_SANDY_BRIDGE_FEATURE_CONFIG_REGISTER *MsrFeatureConfig;
if (CpuInfo->CpuIdVersionInfoEcx.Bits.AESNI == 1) {
if (IS_SANDY_BRIDGE_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
IS_XEON_5600_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
@ -70,7 +71,8 @@ AesniSupport (
MsrFeatureConfig = (MSR_SANDY_BRIDGE_FEATURE_CONFIG_REGISTER *) ConfigData;
ASSERT (MsrFeatureConfig != NULL);
MsrFeatureConfig[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_SANDY_BRIDGE_FEATURE_CONFIG);
return (CpuInfo->CpuIdVersionInfoEcx.Bits.AESNI == 1);
}
return TRUE;
}
return FALSE;
}