Re: [PATCH v2 1/4] target/i386: Add an option in X86CPUDefinition to control CPUID 0x1f

[Zhao Liu <zhao1.liu@intel.com>]

On Mon, Oct 27, 2025 at 06:21:36AM -0400, Ewan Hai wrote:
> Date: Mon, 27 Oct 2025 06:21:36 -0400
> From: Ewan Hai <ewanhai-oc@zhaoxin.com>
> Subject: [PATCH v2 1/4] target/i386: Add an option in X86CPUDefinition to
>  control CPUID 0x1f
> X-Mailer: git-send-email 2.34.1
> 
> From: Zhao Liu <zhao1.liu@intel.com>
> 
> Many Intel and Zhaoxin CPUs enable CPUID 0x1f by default to encode CPU
> topology information.
> 
> Add the "cpuid_0x1f" option to X86CPUDefinition to allow named CPU
> models to configure CPUID 0x1f from the start, thereby forcing 0x1f
> to be present for guest.
> 
> With this option, there's no need to explicitly add v1 model to an
> unversioned CPU model for explicitly enabling the x-force-cpuid-0x1f
> property.
> 
> Tested-by: Xudong Hao <xudong.hao@intel.com>
> Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
> ---
>  target/i386/cpu.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Thanks! I also mentioned this in my series:

https://lore.kernel.org/qemu-devel/20251120071030.961230-8-zhao1.liu@intel.com/

Regards,
Zhao