[edk2-devel] [PATCH v10 16/46] OvmfPkg/VmgExitLib: Add support for MSR_PROT NAE events

[Laszlo Ersek]

On 07/14/20 16:27, Lendacky, Thomas wrote:
> From: Tom Lendacky <thomas.lendacky at amd.com>
> 
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
> 
> Under SEV-ES, a MSR_PROT intercept generates a #VC exception. VMGEXIT must
> be used to allow the hypervisor to handle this intercept.
> 
> Add support to construct the required GHCB values to support an MSR_PROT
> NAE event. Parse the instruction that generated the #VC exception to
> determine whether it is RDMSR or WRMSR, setting the required register
> register values in the GHCB and creating the proper SW_EXIT_INFO1 value in
> the GHCB.
> 
> Cc: Jordan Justen <jordan.l.justen at intel.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
> Acked-by: Laszlo Ersek <lersek at redhat.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
> ---
>  OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)

Thanks for the comment updates, my ACK stands.
Laszlo


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