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Re: [PATCH 08/12] x86/acpi: Migrate vendor checks to cpu_vendor()
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 12 Feb 2026 12:52:23 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Jason Andryuk <jason.andryuk@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 12 Feb 2026 11:52:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 06.02.2026 17:15, Alejandro Vallejo wrote:
> --- a/xen/arch/x86/acpi/cpu_idle.c
> +++ b/xen/arch/x86/acpi/cpu_idle.c
> @@ -178,7 +178,7 @@ static void cf_check do_get_hw_residencies(void *arg)
> struct cpuinfo_x86 *c = ¤t_cpu_data;
> struct hw_residencies *hw_res = arg;
>
> - if ( c->x86_vendor != X86_VENDOR_INTEL || c->x86 != 6 )
> + if ( !(cpu_vendor() & X86_VENDOR_INTEL) || c->x86 != 6 )
> return;
>
> switch ( c->x86_model )
> @@ -915,8 +915,7 @@ void cf_check acpi_dead_idle(void)
> mwait(cx->address, 0);
> }
> }
> - else if ( (current_cpu_data.x86_vendor &
> - (X86_VENDOR_AMD | X86_VENDOR_HYGON)) &&
> + else if ( cpu_vendor() & (X86_VENDOR_AMD | X86_VENDOR_HYGON) &&
While we certainly make that assumption, shouldn't you add explicit checks
that APs' vendors match the BSP's, in order to be able to also replace
current_cpu_data uses? Or do we have such a check, and I'm merely overlooking
it?
Jan
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