diff options
Diffstat (limited to 'UefiCpuPkg/CpuDxe')
| -rw-r--r-- | UefiCpuPkg/CpuDxe/CpuPageTable.c | 85 |
1 files changed, 5 insertions, 80 deletions
diff --git a/UefiCpuPkg/CpuDxe/CpuPageTable.c b/UefiCpuPkg/CpuDxe/CpuPageTable.c index a33ac5519e..e2595b4d89 100644 --- a/UefiCpuPkg/CpuDxe/CpuPageTable.c +++ b/UefiCpuPkg/CpuDxe/CpuPageTable.c @@ -90,70 +90,6 @@ PAGE_ATTRIBUTE_TABLE mPageAttributeTable[] = { PAGE_TABLE_POOL *mPageTablePool = NULL;
/**
- Enable write protection function for AP.
-
- @param[in,out] Buffer The pointer to private data buffer.
-**/
-VOID
-EFIAPI
-SyncCpuEnableWriteProtection (
- IN OUT VOID *Buffer
- )
-{
- AsmWriteCr0 (AsmReadCr0 () | BIT16);
-}
-
-/**
- CpuFlushTlb function for AP.
-
- @param[in,out] Buffer The pointer to private data buffer.
-**/
-VOID
-EFIAPI
-SyncCpuFlushTlb (
- IN OUT VOID *Buffer
- )
-{
- CpuFlushTlb();
-}
-
-/**
- Sync memory page attributes for AP.
-
- @param[in] Procedure A pointer to the function to be run on enabled APs of
- the system.
-**/
-VOID
-SyncMemoryPageAttributesAp (
- IN EFI_AP_PROCEDURE Procedure
- )
-{
- EFI_STATUS Status;
- EFI_MP_SERVICES_PROTOCOL *MpService;
-
- Status = gBS->LocateProtocol (
- &gEfiMpServiceProtocolGuid,
- NULL,
- (VOID **)&MpService
- );
- //
- // Synchronize the update with all APs
- //
- if (!EFI_ERROR (Status)) {
- Status = MpService->StartupAllAPs (
- MpService, // This
- Procedure, // Procedure
- FALSE, // SingleThread
- NULL, // WaitEvent
- 0, // TimeoutInMicrosecsond
- NULL, // ProcedureArgument
- NULL // FailedCpuList
- );
- ASSERT (Status == EFI_SUCCESS || Status == EFI_NOT_STARTED || Status == EFI_NOT_READY);
- }
-}
-
-/**
Return current paging context.
@param[in,out] PagingContext The paging context.
@@ -575,20 +511,6 @@ IsReadOnlyPageWriteProtected ( }
/**
- Disable write protection function for AP.
-
- @param[in,out] Buffer The pointer to private data buffer.
-**/
-VOID
-EFIAPI
-SyncCpuDisableWriteProtection (
- IN OUT VOID *Buffer
- )
-{
- AsmWriteCr0 (AsmReadCr0() & ~BIT16);
-}
-
-/**
Disable Write Protect on pages marked as read-only.
**/
VOID
@@ -835,10 +757,13 @@ AssignMemoryPageAttributes ( if (!EFI_ERROR(Status)) {
if ((PagingContext == NULL) && IsModified) {
//
- // Flush TLB as last step
+ // Flush TLB as last step.
+ //
+ // Note: Since APs will always init CR3 register in HLT loop mode or do
+ // TLB flush in MWAIT loop mode, there's no need to flush TLB for them
+ // here.
//
CpuFlushTlb();
- SyncMemoryPageAttributesAp (SyncCpuFlushTlb);
}
}
|