On Thu, Feb 06, 2025 at 01:28:37PM -0600, Babu Moger wrote:
> Date: Thu, 6 Feb 2025 13:28:37 -0600
> From: Babu Moger <[email protected]>
> Subject: [PATCH v5 4/6] target/i386: Add feature that indicates WRMSR to
>  BASE reg is non-serializing
> X-Mailer: git-send-email 2.34.1
> 
> Add the CPUID bit indicates that a WRMSR to MSR_FS_BASE, MSR_GS_BASE, or
> MSR_KERNEL_GS_BASE is non-serializing.
> 
> CPUID_Fn80000021_EAX
> Bit    Feature description
> 1      FsGsKernelGsBaseNonSerializing.
>        WRMSR to FS_BASE, GS_BASE and KernelGSbase are non-serializing.
> 
> Link: 
> https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/programmer-references/57238.zip
> Signed-off-by: Babu Moger <[email protected]>
> Reviewed-by: Maksim Davydov <[email protected]>
> ---
>  target/i386/cpu.c | 2 +-
>  target/i386/cpu.h | 2 ++
>  2 files changed, 3 insertions(+), 1 deletion(-)

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


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