Re: [PATCH v2 1/2] KVM: x86: Add helper to retrieve current value of user return MSR

[Xiaoyao Li]

On 9/20/2025 5:38 AM, Sean Christopherson wrote:
> From: Hou Wenlong <houwenlong.hwl@xxxxxxxxxxxx>
>
> In the user return MSR support, the cached value is always the hardware
> value of the specific MSR. Therefore, add a helper to retrieve the
> cached value, which can replace the need for RDMSR, for example, to
> allow SEV-ES guests to restore the correct host hardware value without
> using RDMSR.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Hou Wenlong <houwenlong.hwl@xxxxxxxxxxxx>
> [sean: drop "cache" from the name, make it a one-liner, tag for stable]
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>