diff options
| author | Liu, Zhiguang <Zhiguang.Liu@intel.com> | 2022-08-26 15:39:01 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-08-31 04:23:55 +0000 |
| commit | 4b7bd4c591a81a290b31e9d1a94c4b8be787989e (patch) | |
| tree | ed97930a82bcc820462d05c4b7895b577b4117c8 /UefiCpuPkg/CpuDxe | |
| parent | 9ab2b34dd4f7e5cc6170ff812b0a07d58e5510b6 (diff) | |
| download | edk2-4b7bd4c591a81a290b31e9d1a94c4b8be787989e.tar.gz edk2-4b7bd4c591a81a290b31e9d1a94c4b8be787989e.tar.bz2 edk2-4b7bd4c591a81a290b31e9d1a94c4b8be787989e.zip | |
UefiCpuPkg: Enhance logic in InitializeMpExceptionStackSwitchHandlers
Parallelly run the function to SeparateExceptionStacks for all CPUs and
allocate buffers together for better performance.
Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
Diffstat (limited to 'UefiCpuPkg/CpuDxe')
| -rw-r--r-- | UefiCpuPkg/CpuDxe/CpuMp.c | 104 |
1 files changed, 65 insertions, 39 deletions
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c index f3ca813d2a..e7575d9b80 100644 --- a/UefiCpuPkg/CpuDxe/CpuMp.c +++ b/UefiCpuPkg/CpuDxe/CpuMp.c @@ -600,8 +600,9 @@ CollectBistDataFromHob ( // Structure for InitializeSeparateExceptionStacks
//
typedef struct {
- VOID *Buffer;
- UINTN *BufferSize;
+ VOID *Buffer;
+ UINTN BufferSize;
+ EFI_STATUS Status;
} EXCEPTION_STACK_SWITCH_CONTEXT;
/**
@@ -620,9 +621,18 @@ InitializeExceptionStackSwitchHandlers ( )
{
EXCEPTION_STACK_SWITCH_CONTEXT *SwitchStackData;
+ UINTN Index;
+ MpInitLibWhoAmI (&Index);
SwitchStackData = (EXCEPTION_STACK_SWITCH_CONTEXT *)Buffer;
- InitializeSeparateExceptionStacks (SwitchStackData->Buffer, SwitchStackData->BufferSize);
+
+ //
+ // This may be called twice for each Cpu. Only run InitializeSeparateExceptionStacks
+ // if this is the first call or the first call failed because of size too small.
+ //
+ if ((SwitchStackData[Index].Status == EFI_NOT_STARTED) || (SwitchStackData[Index].Status == EFI_BUFFER_TOO_SMALL)) {
+ SwitchStackData[Index].Status = InitializeSeparateExceptionStacks (SwitchStackData[Index].Buffer, &SwitchStackData[Index].BufferSize);
+ }
}
/**
@@ -638,53 +648,69 @@ InitializeMpExceptionStackSwitchHandlers ( )
{
UINTN Index;
- UINTN Bsp;
- EXCEPTION_STACK_SWITCH_CONTEXT SwitchStackData;
+ EXCEPTION_STACK_SWITCH_CONTEXT *SwitchStackData;
UINTN BufferSize;
+ EFI_STATUS Status;
+ UINT8 *Buffer;
- SwitchStackData.BufferSize = &BufferSize;
- MpInitLibWhoAmI (&Bsp);
-
+ SwitchStackData = AllocateZeroPool (mNumberOfProcessors * sizeof (EXCEPTION_STACK_SWITCH_CONTEXT));
+ ASSERT (SwitchStackData != NULL);
for (Index = 0; Index < mNumberOfProcessors; ++Index) {
- SwitchStackData.Buffer = NULL;
- BufferSize = 0;
+ //
+ // Because the procedure may runs multiple times, use the status EFI_NOT_STARTED
+ // to indicate the procedure haven't been run yet.
+ //
+ SwitchStackData[Index].Status = EFI_NOT_STARTED;
+ }
- if (Index == Bsp) {
- InitializeExceptionStackSwitchHandlers (&SwitchStackData);
+ Status = MpInitLibStartupAllCPUs (
+ InitializeExceptionStackSwitchHandlers,
+ 0,
+ SwitchStackData
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ BufferSize = 0;
+ for (Index = 0; Index < mNumberOfProcessors; ++Index) {
+ if (SwitchStackData[Index].Status == EFI_BUFFER_TOO_SMALL) {
+ ASSERT (SwitchStackData[Index].BufferSize != 0);
+ BufferSize += SwitchStackData[Index].BufferSize;
} else {
- //
- // AP might need different buffer size from BSP.
- //
- MpInitLibStartupThisAP (InitializeExceptionStackSwitchHandlers, Index, NULL, 0, (VOID *)&SwitchStackData, NULL);
+ ASSERT (SwitchStackData[Index].Status == EFI_SUCCESS);
+ ASSERT (SwitchStackData[Index].BufferSize == 0);
}
+ }
- if (BufferSize == 0) {
- continue;
+ if (BufferSize != 0) {
+ Buffer = AllocateRuntimeZeroPool (BufferSize);
+ ASSERT (Buffer != NULL);
+ BufferSize = 0;
+ for (Index = 0; Index < mNumberOfProcessors; ++Index) {
+ if (SwitchStackData[Index].Status == EFI_BUFFER_TOO_SMALL) {
+ SwitchStackData[Index].Buffer = (VOID *)(&Buffer[BufferSize]);
+ BufferSize += SwitchStackData[Index].BufferSize;
+ DEBUG ((
+ DEBUG_INFO,
+ "Buffer[cpu%lu] for InitializeExceptionStackSwitchHandlers: 0x%lX with size 0x%lX\n",
+ (UINT64)(UINTN)Index,
+ (UINT64)(UINTN)SwitchStackData[Index].Buffer,
+ (UINT64)(UINTN)SwitchStackData[Index].BufferSize
+ ));
+ }
}
- SwitchStackData.Buffer = AllocateRuntimeZeroPool (BufferSize);
- ASSERT (SwitchStackData.Buffer != NULL);
- DEBUG ((
- DEBUG_INFO,
- "Buffer[cpu%lu] for InitializeExceptionStackSwitchHandlers: 0x%lX with size 0x%x\n",
- (UINT64)(UINTN)Index,
- (UINT64)(UINTN)SwitchStackData.Buffer,
- (UINT32)BufferSize
- ));
-
- if (Index == Bsp) {
- InitializeExceptionStackSwitchHandlers (&SwitchStackData);
- } else {
- MpInitLibStartupThisAP (
- InitializeExceptionStackSwitchHandlers,
- Index,
- NULL,
- 0,
- (VOID *)&SwitchStackData,
- NULL
- );
+ Status = MpInitLibStartupAllCPUs (
+ InitializeExceptionStackSwitchHandlers,
+ 0,
+ SwitchStackData
+ );
+ ASSERT_EFI_ERROR (Status);
+ for (Index = 0; Index < mNumberOfProcessors; ++Index) {
+ ASSERT (SwitchStackData[Index].Status == EFI_SUCCESS);
}
}
+
+ FreePool (SwitchStackData);
}
/**
|