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Subject: Re: [PATCH v9 16/46] OvmfPkg/VmgExitLib: Add support for MSR_PROT NAE events
To: Tom Lendacky <thomas.lendacky@amd.com>, devel@edk2.groups.io
Cc: Brijesh Singh <brijesh.singh@amd.com>,
 Ard Biesheuvel <ard.biesheuvel@arm.com>, Eric Dong <eric.dong@intel.com>,
 Jordan Justen <jordan.l.justen@intel.com>, Liming Gao
 <liming.gao@intel.com>, Michael D Kinney <michael.d.kinney@intel.com>,
 Ray Ni <ray.ni@intel.com>
References: <cover.1591363657.git.thomas.lendacky@amd.com>
 <4755705446e2be236ec262cc47ed59d5fdc112ba.1591363657.git.thomas.lendacky@amd.com>
From: "Laszlo Ersek" <lersek@redhat.com>
Message-ID: <d78f6ab3-96cd-db6f-b32e-099e5613a37e@redhat.com>
Date: Wed, 10 Jun 2020 14:43:08 +0200
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On 06/05/20 15:27, Tom Lendacky wrote:
> 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@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 | 65 ++++++++++++++++++++
>  1 file changed, 65 insertions(+)

Thanks for the updates.