[edk2-devel] [PATCH v7 2/6] UefiCpuPkg/PiSmmCpuDxeSmm: Replace mIsBsp by mBspApicId check
Wu, Jiaxin
jiaxin.wu at intel.com
Tue Feb 14 08:33:10 UTC 2023
This patch is to replace mIsBsp by mBspApicId check.
mIsBsp becomes the local variable (IsBsp), then it can be
checked dynamically in the function. Instead, we define the
mBspApicId, which is to record the BSP ApicId used for
compare in SmmInitHandler. With this change, SmmInitHandler
can be run in parallel during SMM init.
Note:
This patch is the per-prepared work by refining the
SmmInitHandler, then, we can do the next step to
combine 2 SMIs (gcSmmInitTemplate & gcSmiHandlerTemplate)
into one (gcSmiHandlerTemplate), the new SMI handler
will call the SmmInitHandler in parallel to do the init.
Cc: Eric Dong <eric.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Zeng Star <star.zeng at intel.com>
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Rahul Kumar <rahul1.kumar at intel.com>
Signed-off-by: Jiaxin Wu <jiaxin.wu at intel.com>
Reviewed-by: Ray Ni <ray.ni at intel.com>
---
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
index 2ac655d032..6e795d1756 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
@@ -57,11 +57,10 @@ SMM_CPU_PRIVATE_DATA *gSmmCpuPrivate = &mSmmCpuPrivateData;
//
// SMM Relocation variables
//
volatile BOOLEAN *mRebased;
-volatile BOOLEAN mIsBsp;
///
/// Handle for the SMM CPU Protocol
///
EFI_HANDLE mSmmCpuHandle = NULL;
@@ -83,10 +82,12 @@ EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL mSmmMemoryAttribute = {
EdkiiSmmClearMemoryAttributes
};
EFI_CPU_INTERRUPT_HANDLER mExternalVectorTable[EXCEPTION_VECTOR_NUMBER];
+UINT32 mBspApicId = 0;
+
//
// SMM stack information
//
UINTN mSmmStackArrayBase;
UINTN mSmmStackArrayEnd;
@@ -341,39 +342,42 @@ VOID
EFIAPI
SmmInitHandler (
VOID
)
{
- UINT32 ApicId;
- UINTN Index;
+ UINT32 ApicId;
+ UINTN Index;
+ BOOLEAN IsBsp;
//
// Update SMM IDT entries' code segment and load IDT
//
AsmWriteIdtr (&gcSmiIdtr);
ApicId = GetApicId ();
+ IsBsp = (BOOLEAN)(mBspApicId == ApicId);
+
ASSERT (mNumberOfCpus <= mMaxNumberOfCpus);
for (Index = 0; Index < mNumberOfCpus; Index++) {
if (ApicId == (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
//
// Initialize SMM specific features on the currently executing CPU
//
SmmCpuFeaturesInitializeProcessor (
Index,
- mIsBsp,
+ IsBsp,
gSmmCpuPrivate->ProcessorInfo,
&mCpuHotPlugData
);
if (!mSmmS3Flag) {
//
// Check XD and BTS features on each processor on normal boot
//
CheckFeatureSupported ();
- } else if (mIsBsp) {
+ } else if (IsBsp) {
//
// BSP rebase is already done above.
// Initialize private data during S3 resume
//
InitializeMpSyncData ();
@@ -405,11 +409,10 @@ SmmRelocateBases (
{
UINT8 BakBuf[BACK_BUF_SIZE];
SMRAM_SAVE_STATE_MAP BakBuf2;
SMRAM_SAVE_STATE_MAP *CpuStatePtr;
UINT8 *U8Ptr;
- UINT32 ApicId;
UINTN Index;
UINTN BspIndex;
//
// Make sure the reserved size is large enough for procedure SmmInitTemplate.
@@ -446,21 +449,20 @@ SmmRelocateBases (
CopyMem (U8Ptr, gcSmmInitTemplate, gcSmmInitSize);
//
// Retrieve the local APIC ID of current processor
//
- ApicId = GetApicId ();
+ mBspApicId = GetApicId ();
//
// Relocate SM bases for all APs
// This is APs' 1st SMI - rebase will be done here, and APs' default SMI handler will be overridden by gcSmmInitTemplate
//
- mIsBsp = FALSE;
BspIndex = (UINTN)-1;
for (Index = 0; Index < mNumberOfCpus; Index++) {
mRebased[Index] = FALSE;
- if (ApicId != (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
+ if (mBspApicId != (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
SendSmiIpi ((UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId);
//
// Wait for this AP to finish its 1st SMI
//
while (!mRebased[Index]) {
@@ -475,12 +477,11 @@ SmmRelocateBases (
//
// Relocate BSP's SMM base
//
ASSERT (BspIndex != (UINTN)-1);
- mIsBsp = TRUE;
- SendSmiIpi (ApicId);
+ SendSmiIpi (mBspApicId);
//
// Wait for the BSP to finish its 1st SMI
//
while (!mRebased[BspIndex]) {
}
--
2.16.2.windows.1
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