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UefiCpuPkg/MpInitLib: Produce EDKII microcode patch HOB

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REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2430

This commit will update the MpInitLib to:

A. Collect the base address and size information after microcode patches
   being loaded into memory;
B. Collect the detected microcode patch for each processor within system;
C. Based on the collected information, produce the EDKII microcode patch
   HOB.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Hao A Wu
2019-12-23 14:32:49 +08:00
committed by mergify[bot]
parent 253909974a
commit e1ed55738e
5 changed files with 100 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
UefiCpuPkg/Library/MpInitLib/Microcode.c
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@@ -65,13 +65,15 @@ GetCurrentMicrocodeSignature (
It does not guarantee that the data has not been modified.
CPU has its own mechanism to verify Microcode Binary part.
@param[in] CpuMpData The pointer to CPU MP Data structure.
@param[in] IsBspCallIn Indicate whether the caller is BSP or not.
@param[in] CpuMpData The pointer to CPU MP Data structure.
@param[in] ProcessorNumber The handle number of the processor. The range is
from 0 to the total number of logical processors
minus 1.
**/
VOID
MicrocodeDetect (
IN CPU_MP_DATA *CpuMpData,
IN BOOLEAN IsBspCallIn
IN UINTN ProcessorNumber
)
{
UINT32 ExtendedTableLength;
@@ -93,6 +95,7 @@ MicrocodeDetect (
MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
UINT32 ProcessorFlags;
UINT32 ThreadId;
BOOLEAN IsBspCallIn;
//
// set ProcessorFlags to suppress incorrect compiler/analyzer warnings
@@ -107,6 +110,7 @@ MicrocodeDetect (
}
CurrentRevision = GetCurrentMicrocodeSignature ();
IsBspCallIn = (ProcessorNumber == (UINTN)CpuMpData->BspNumber) ? TRUE : FALSE;
if (CurrentRevision != 0 && !IsBspCallIn) {
//
// Skip loading microcode if it has been loaded successfully
@@ -295,6 +299,16 @@ MicrocodeDetect (
} while (((UINTN) MicrocodeEntryPoint < MicrocodeEnd));
Done:
if (LatestRevision != 0) {
//
// Save the detected microcode patch entry address (including the
// microcode patch header) for each processor.
// It will be used when building the microcode patch cache HOB.
//
CpuMpData->CpuData[ProcessorNumber].MicrocodeEntryAddr =
(UINTN) MicrocodeData - sizeof (CPU_MICROCODE_HEADER);
}
if (LatestRevision > CurrentRevision) {
//
// BIOS only authenticate updates that contain a numerically larger revision