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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-08-12 15:21:38 -0500 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-08-17 02:46:39 +0000 |
| commit | 4de7047976107bf27cc0f851b7ed3cbd90982149 (patch) | |
| tree | e36ac7fe1911fc2ab0af24ec256cadb48d84308f /OvmfPkg | |
| parent | c45f678a1ea2080344e125dc55b14e4b9f98483d (diff) | |
| download | edk2-4de7047976107bf27cc0f851b7ed3cbd90982149.tar.gz edk2-4de7047976107bf27cc0f851b7ed3cbd90982149.tar.bz2 edk2-4de7047976107bf27cc0f851b7ed3cbd90982149.zip | |
OvmfPkg/VmgExitLib: Add support for WBINVD NAE events
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Under SEV-ES, a WBINVD intercept generates a #VC exception. VMGEXIT must be
used to allow the hypervisor to handle this intercept.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c b/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c index 03fa9f6f7f..2070c943de 100644 --- a/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c +++ b/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c @@ -859,6 +859,31 @@ MmioExit ( }
/**
+ Handle a WBINVD event.
+
+ Use the VMGEXIT instruction to handle a WBINVD event.
+
+ @param[in, out] Ghcb Pointer to the Guest-Hypervisor Communication
+ Block
+ @param[in, out] Regs x64 processor context
+ @param[in] InstructionData Instruction parsing context
+
+ @retval 0 Event handled successfully
+ @return New exception value to propagate
+
+**/
+STATIC
+UINT64
+WbinvdExit (
+ IN OUT GHCB *Ghcb,
+ IN OUT EFI_SYSTEM_CONTEXT_X64 *Regs,
+ IN SEV_ES_INSTRUCTION_DATA *InstructionData
+ )
+{
+ return VmgExit (Ghcb, SVM_EXIT_WBINVD, 0, 0);
+}
+
+/**
Handle an MSR event.
Use the VMGEXIT instruction to handle either a RDMSR or WRMSR event.
@@ -1254,6 +1279,10 @@ VmgExitHandleVc ( NaeExit = MsrExit;
break;
+ case SVM_EXIT_WBINVD:
+ NaeExit = WbinvdExit;
+ break;
+
case SVM_EXIT_NPF:
NaeExit = MmioExit;
break;
|