diff options
Diffstat (limited to 'EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk')
| -rw-r--r-- | EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/MpServicesOnFrameworkMpServicesThunk.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/MpServicesOnFrameworkMpServicesThunk.c b/EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/MpServicesOnFrameworkMpServicesThunk.c index 9005670bae..4d0918fa78 100644 --- a/EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/MpServicesOnFrameworkMpServicesThunk.c +++ b/EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/MpServicesOnFrameworkMpServicesThunk.c @@ -1444,6 +1444,8 @@ PrepareAPStartupVector ( {
MP_ASSEMBLY_ADDRESS_MAP AddressMap;
IA32_DESCRIPTOR GdtrForBSP;
+ EFI_PHYSICAL_ADDRESS GdtForAP;
+ EFI_STATUS Status;
//
// Get the address map of startup code for AP,
@@ -1481,7 +1483,22 @@ PrepareAPStartupVector ( mExchangeInfo->StackSize = AP_STACK_SIZE;
AsmReadGdtr (&GdtrForBSP);
- mExchangeInfo->GdtrProfile.Base = GdtrForBSP.Base;
+
+ //
+ // Allocate memory under 4G to hold GDT for APs
+ //
+ GdtForAP = 0xffffffff;
+ Status = gBS->AllocatePages (
+ AllocateMaxAddress,
+ EfiBootServicesData,
+ EFI_SIZE_TO_PAGES (GdtrForBSP.Limit + 1),
+ &GdtForAP
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ CopyMem ((VOID *) (UINTN) GdtForAP, (VOID *) GdtrForBSP.Base, GdtrForBSP.Limit + 1);
+
+ mExchangeInfo->GdtrProfile.Base = (UINTN) GdtForAP;
mExchangeInfo->GdtrProfile.Limit = GdtrForBSP.Limit;
mExchangeInfo->BufferStart = (UINT32) mStartupVector;
|