On 06/05/20 15:27, Tom Lendacky wrote:
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
>
> Under SEV-ES, a INVD 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>
> ---
> OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c | 29 ++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c b/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c
> index 0dbb10eee85c..9419651fea2e 100644
> --- a/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c
> +++ b/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c
> @@ -1164,6 +1164,31 @@ IoioExit (
> return 0;
> }
>
> +/**
> + Handle a INVD event.
> +
> + Use the VMGEXIT instruction to handle a INVD 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
> +
> + @return 0 Event handled successfully
> + @return Others New exception value to propagate
> +
> +**/
> +STATIC
> +UINT64
> +InvdExit (
> + IN OUT GHCB *Ghcb,
> + IN OUT EFI_SYSTEM_CONTEXT_X64 *Regs,
> + IN SEV_ES_INSTRUCTION_DATA *InstructionData
> + )
> +{
> + return VmgExit (Ghcb, SVM_EXIT_INVD, 0, 0);
> +}
> +
> /**
> Handle a CPUID event.
>
> @@ -1356,6 +1381,10 @@ VmgExitHandleVc (
> NaeExit = CpuidExit;
> break;
>
> + case SVM_EXIT_INVD:
> + NaeExit = InvdExit;
> + break;
> +
> case SVM_EXIT_IOIO_PROT:
> NaeExit = IoioExit;
> break;
>
looks good, thanks
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