Re: [PATCH v3 05/10] target/i386/kvm: Classify PMU vendor families

On Mon, Aug 24, 2026 at 12:53:09PM +0800, Tina Zhang wrote:
> Date: Mon, 24 Aug 2026 12:53:09 +0800
> From: Tina Zhang <[email protected]>
> Subject: [PATCH v3 05/10] target/i386/kvm: Classify PMU vendor families
> X-Mailer: git-send-email 2.43.7
> 
> The Intel and Zhaoxin PMU architectures are compatible, while AMD uses
> a separate PMU CPUID/MSR layout.  KVM's PMU initialization, host/guest
> compatibility, and MSR save/restore paths open-code these vendor checks
> in several places.
> 
> Introduce X86PMUVendor and helpers that classify the existing CPU and
> host vendors by PMU architecture.  Use the classification consistently
> for the compatibility check, PMU initialization, and PMU MSR paths.
> 
> This is a refactoring with no functional change.
> 
> Signed-off-by: Tina Zhang <[email protected]>
> ---
>  target/i386/kvm/kvm.c | 72 +++++++++++++++++++++++++++++++++----------
>  1 file changed, 55 insertions(+), 17 deletions(-)

Reviewed-by: Zhao Liu <[email protected]>