Signed-off-by: Eric Dong <eric.d...@intel.com>
Cc: Ray Ni <ray...@intel.com>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
---
UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c | 104 ++++++++++++++++++------------
1 file changed, 62 insertions(+), 42 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
b/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
index d8c6b19ead..627a3b87ac 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
@@ -159,6 +159,58 @@ S3WaitForSemaphore (
) != Value);
}
+/**
+ Read / write CR value.
+
+ @param[in] CrIndex The CR index which need to read/write.
+ @param[in] Read Read or write. TRUE is read.
+ @param[in,out] CrValue CR value.
+
+ @retval EFI_SUCCESS means read/write success, else return EFI_UNSUPPORTED.
+**/
+UINTN
+ReadWriteCr (
+ IN UINT32 CrIndex,
+ IN BOOLEAN Read,
+ IN OUT UINTN *CrValue
+ )
+{
+ switch (CrIndex) {
+ case 0:
+ if (Read) {
+ *CrValue = AsmReadCr0 ();
+ } else {
+ AsmWriteCr0 (*CrValue);
+ }
+ break;
+ case 2:
+ if (Read) {
+ *CrValue = AsmReadCr2 ();
+ } else {
+ AsmWriteCr2 (*CrValue);
+ }
+ break;
+ case 3:
+ if (Read) {
+ *CrValue = AsmReadCr3 ();
+ } else {
+ AsmWriteCr3 (*CrValue);
+ }
+ break;
+ case 4:
+ if (Read) {
+ *CrValue = AsmReadCr4 ();
+ } else {
+ AsmWriteCr4 (*CrValue);
+ }
+ break;
+ default:
+ return EFI_UNSUPPORTED;;
+ }
+
+ return EFI_SUCCESS;
+}
+
/**
Initialize the CPU registers from a register table.
@@ -188,6 +240,7 @@ ProgramProcessorRegister (
UINTN ProcessorIndex;
UINTN ValidThreadCount;
UINT32 *ValidCoreCountPerPackage;
+ EFI_STATUS Status;
//
// Traverse Register Table of this logical processor
@@ -206,50 +259,17 @@ ProgramProcessorRegister (
// The specified register is Control Register
//
case ControlRegister:
- switch (RegisterTableEntry->Index) {
- case 0:
- Value = AsmReadCr0 ();
- Value = (UINTN) BitFieldWrite64 (
- Value,
- RegisterTableEntry->ValidBitStart,
- RegisterTableEntry->ValidBitStart +
RegisterTableEntry->ValidBitLength - 1,
- (UINTN) RegisterTableEntry->Value
- );
- AsmWriteCr0 (Value);
- break;
- case 2:
- Value = AsmReadCr2 ();
- Value = (UINTN) BitFieldWrite64 (
- Value,
- RegisterTableEntry->ValidBitStart,
- RegisterTableEntry->ValidBitStart +
RegisterTableEntry->ValidBitLength - 1,
- (UINTN) RegisterTableEntry->Value
- );
- AsmWriteCr2 (Value);
- break;
- case 3:
- Value = AsmReadCr3 ();
- Value = (UINTN) BitFieldWrite64 (
- Value,
- RegisterTableEntry->ValidBitStart,
- RegisterTableEntry->ValidBitStart +
RegisterTableEntry->ValidBitLength - 1,
- (UINTN) RegisterTableEntry->Value
- );
- AsmWriteCr3 (Value);
- break;
- case 4:
- Value = AsmReadCr4 ();
- Value = (UINTN) BitFieldWrite64 (
- Value,
- RegisterTableEntry->ValidBitStart,
- RegisterTableEntry->ValidBitStart +
RegisterTableEntry->ValidBitLength - 1,
- (UINTN) RegisterTableEntry->Value
- );
- AsmWriteCr4 (Value);
- break;
- default:
+ Status = ReadWriteCr (RegisterTableEntry->Index, TRUE, &Value);
+ if (EFI_ERROR (Status)) {
break;
}
+ Value = (UINTN) BitFieldWrite64 (
+ Value,
+ RegisterTableEntry->ValidBitStart,
+ RegisterTableEntry->ValidBitStart +
RegisterTableEntry->ValidBitLength - 1,
+ RegisterTableEntry->Value
+ );
+ ReadWriteCr (RegisterTableEntry->Index, FALSE, &Value);
break;
//
// The specified register is Model Specific Register
--
2.21.0.windows.1
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