Re: [RFC PATCH v4 33/36] i386/tdx: Only configure MSR_IA32_UCODE_REV in kvm_init_msrs() for TDs

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Subject: Re: [RFC PATCH v4 33/36] i386/tdx: Only configure MSR_IA32_UCODE_REV in kvm_init_msrs() for TDs
From: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Date: Tue, 24 May 2022 10:05:50 +0200
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>, Isaku Yamahata <isaku.yamahata@xxxxxxxxx>, isaku.yamahata@xxxxxxxxx, Daniel P . Berrangé <berrange@xxxxxxxxxx>, Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>, Richard Henderson <richard.henderson@xxxxxxxxxx>, "Michael S . Tsirkin" <mst@xxxxxxxxxx>, Marcel Apfelbaum <marcel.apfelbaum@xxxxxxxxx>, Cornelia Huck <cohuck@xxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Laszlo Ersek <lersek@xxxxxxxxxx>, Eric Blake <eblake@xxxxxxxxxx>, Connor Kuehl <ckuehl@xxxxxxxxxx>, erdemaktas@xxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, qemu-devel@xxxxxxxxxx, seanjc@xxxxxxxxxx
In-reply-to: <20220512031803.3315890-34-xiaoyao.li@intel.com>
References: <20220512031803.3315890-1-xiaoyao.li@intel.com> <20220512031803.3315890-34-xiaoyao.li@intel.com>

On Thu, May 12, 2022 at 11:18:00AM +0800, Xiaoyao Li wrote:
> For TDs, only MSR_IA32_UCODE_REV in kvm_init_msrs() can be configured
> by VMM, while the features enumerated/controlled by other MSRs except
> MSR_IA32_UCODE_REV in kvm_init_msrs() are not under control of VMM.
> 
> Only configure MSR_IA32_UCODE_REV for TDs.

Acked-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>

References:
- [RFC PATCH v4 00/36] TDX QEMU support
  - From: Xiaoyao Li
- [RFC PATCH v4 33/36] i386/tdx: Only configure MSR_IA32_UCODE_REV in kvm_init_msrs() for TDs
  - From: Xiaoyao Li

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