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UefiCpuPkg/CpuExceptionHandler: Add base support for the #VE exception

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RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Add base support to handle #VE exceptions. Update the common exception
handlers to invoke the VmTdExitHandleVe () function of the VmgExitLib
library when a #VE is encountered. A non-zero return code will propagate
to the targeted exception handler.

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
This commit is contained in:
Min Xu 2021-07-18 10:20:21 +08:00 committed by mergify[bot]
parent daf8f642f3
commit de327f7d8a
2 changed files with 79 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
View File

@ -24,25 +24,48 @@ CommonExceptionHandlerWorker (
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
) )
{ {
EFI_STATUS Status;
EXCEPTION_HANDLER_CONTEXT *ExceptionHandlerContext; EXCEPTION_HANDLER_CONTEXT *ExceptionHandlerContext;
RESERVED_VECTORS_DATA *ReservedVectors; RESERVED_VECTORS_DATA *ReservedVectors;
EFI_CPU_INTERRUPT_HANDLER *ExternalInterruptHandler; EFI_CPU_INTERRUPT_HANDLER *ExternalInterruptHandler;
if (ExceptionType == VC_EXCEPTION) { switch (ExceptionType) {
EFI_STATUS Status; case VC_EXCEPTION:
// //
// #VC needs to be handled immediately upon enabling exception handling // #VC needs to be handled immediately upon enabling exception handling
// and therefore can't use the RegisterCpuInterruptHandler() interface. // and therefore can't use the RegisterCpuInterruptHandler() interface.
// //
// Handle the #VC: // Handle the #VC:
// On EFI_SUCCESS - Exception has been handled, return // On EFI_SUCCESS - Exception has been handled, return
// On other - ExceptionType contains (possibly new) exception // On other - ExceptionType contains (possibly new) exception
// value // value
// //
Status = VmgExitHandleVc (&ExceptionType, SystemContext); Status = VmgExitHandleVc (&ExceptionType, SystemContext);
if (!EFI_ERROR (Status)) { if (!EFI_ERROR (Status)) {
return; return;
} }
break;
case VE_EXCEPTION:
//
// #VE needs to be handled immediately upon enabling exception handling
// and therefore can't use the RegisterCpuInterruptHandler() interface.
//
// Handle the #VE:
// On EFI_SUCCESS - Exception has been handled, return
// On other - ExceptionType contains (possibly new) exception
// value
//
Status = VmTdExitHandleVe (&ExceptionType, SystemContext);
if (!EFI_ERROR (Status)) {
return;
}
break;
default:
break;
} }
ExceptionHandlerContext = (EXCEPTION_HANDLER_CONTEXT *)(UINTN)(SystemContext.SystemContextIa32); ExceptionHandlerContext = (EXCEPTION_HANDLER_CONTEXT *)(UINTN)(SystemContext.SystemContextIa32);

57
UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
View File

@ -25,22 +25,47 @@ CommonExceptionHandler (
IN EFI_SYSTEM_CONTEXT SystemContext IN EFI_SYSTEM_CONTEXT SystemContext
) )
{ {
if (ExceptionType == VC_EXCEPTION) { EFI_STATUS Status;
EFI_STATUS Status;
// switch (ExceptionType) {
// #VC needs to be handled immediately upon enabling exception handling case VC_EXCEPTION:
// and therefore can't use the RegisterCpuInterruptHandler() interface //
// (which isn't supported under Sec and Pei anyway). // #VC needs to be handled immediately upon enabling exception handling
// // and therefore can't use the RegisterCpuInterruptHandler() interface
// Handle the #VC: // (which isn't supported under Sec and Pei anyway).
// On EFI_SUCCESS - Exception has been handled, return //
// On other - ExceptionType contains (possibly new) exception // Handle the #VC:
// value // On EFI_SUCCESS - Exception has been handled, return
// // On other - ExceptionType contains (possibly new) exception
Status = VmgExitHandleVc (&ExceptionType, SystemContext); // value
if (!EFI_ERROR (Status)) { //
return; Status = VmgExitHandleVc (&ExceptionType, SystemContext);
} if (!EFI_ERROR (Status)) {
return;
}
break;
case VE_EXCEPTION:
//
// #VE needs to be handled immediately upon enabling exception handling
// and therefore can't use the RegisterCpuInterruptHandler() interface
// (which isn't supported under Sec and Pei anyway).
//
// Handle the #VE:
// On EFI_SUCCESS - Exception has been handled, return
// On other - ExceptionType contains (possibly new) exception
// value
//
Status = VmTdExitHandleVe (&ExceptionType, SystemContext);
if (!EFI_ERROR (Status)) {
return;
}
break;
default:
break;
} }
// //