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| author | Eric Dong <eric.dong@intel.com> | 2018-07-12 18:21:01 +0800 |
|---|---|---|
| committer | Eric Dong <eric.dong@intel.com> | 2018-07-18 12:43:30 +0800 |
| commit | f63a3e286765f47b79a73d56f8d687c4f3733979 (patch) | |
| tree | f4e3104d58a33b3e8249dbb58ef6d1f360c377d3 /UefiCpuPkg | |
| parent | 2a08913443bb3fff0056cc555e260b2c3fdd2120 (diff) | |
| download | edk2-f63a3e286765f47b79a73d56f8d687c4f3733979.tar.gz edk2-f63a3e286765f47b79a73d56f8d687c4f3733979.tar.bz2 edk2-f63a3e286765f47b79a73d56f8d687c4f3733979.zip | |
UefiCpuPkg/MpInitLib: Load uCode once for each core.
The SDM requires only one thread per core to load the
microcode.
This change enables this solution.
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Dong <eric.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Diffstat (limited to 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/Microcode.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/Microcode.c b/UefiCpuPkg/Library/MpInitLib/Microcode.c index 30ceaa46ad..efda143e67 100644 --- a/UefiCpuPkg/Library/MpInitLib/Microcode.c +++ b/UefiCpuPkg/Library/MpInitLib/Microcode.c @@ -61,6 +61,7 @@ MicrocodeDetect ( VOID *MicrocodeData;
MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
UINT32 ProcessorFlags;
+ UINT32 ThreadId;
if (CpuMpData->MicrocodePatchRegionSize == 0) {
//
@@ -77,6 +78,14 @@ MicrocodeDetect ( return;
}
+ GetProcessorLocationByApicId (GetInitialApicId (), NULL, NULL, &ThreadId);
+ if (ThreadId != 0) {
+ //
+ // Skip loading microcode if it is not the first thread in one core.
+ //
+ return;
+ }
+
ExtendedTableLength = 0;
//
// Here data of CPUID leafs have not been collected into context buffer, so
|