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Re: [PATCH] x86/MCE: don't treat S3 resume the same as boot
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 29 May 2024 11:57:02 +0100
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 29 May 2024 10:57:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29/05/2024 11:46 am, Jan Beulich wrote:
> Checks for running on CPU0 are bogus; they identify S3 resume the same
> as being the BSP while booting. Replace with the same check we use
> elsewhere to properly limit things to just the BSP.
>
> Link: https://gitlab.com/xen-project/xen/-/jobs/6966698361
> Fixes: 19b6e9f9149f ("x86/MCE: optional build of AMD/Intel MCE code")
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> --- a/xen/arch/x86/cpu/mcheck/mce_intel.c
> +++ b/xen/arch/x86/cpu/mcheck/mce_intel.c
> @@ -767,7 +767,7 @@ static void intel_init_mca(struct cpuinf
> lmce = intel_enable_lmce();
>
> #define CAP(enabled, name) ((enabled) ? ", " name : "")
> - if ( smp_processor_id() == 0 )
> + if ( c == &boot_cpu_data )
Look at the callers of this function.
This doesn't help in the slightest, because mcheck_init() is
extra-specially wonky.
~Andrew
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