Re: [PATCH v7 009/120] x86/cpu: Use parsed CPUID(0x0)

[Borislav Petkov]

On Thu, May 28, 2026 at 05:37:31PM +0200, Ahmed S. Darwish wrote:
> Use parsed CPUID(0x0) instead of a direct CPUID query.
> 
> Signed-off-by: Ahmed S. Darwish <darwi@xxxxxxxxxxxxx>
> ---
>  arch/x86/kernel/cpu/common.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index 5cae6c48dd25..281dc591ea79 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -942,11 +942,15 @@ void get_cpu_vendor(struct cpuinfo_x86 *c)
>  
>  void cpu_detect(struct cpuinfo_x86 *c)
>  {
> -	/* Get vendor name */
> -	cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
> -	      (unsigned int *)&c->x86_vendor_id[0],
> -	      (unsigned int *)&c->x86_vendor_id[8],
> -	      (unsigned int *)&c->x86_vendor_id[4]);
> +	const struct leaf_0x0_0 *l0 = cpuid_leaf(c, 0x0);
> +
> +	if (!l0)
> +		return;

What for?

-- 
Regards/Gruss,
    Boris.

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