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Re: [PATCH v2 1/2] xen/riscv: skip disabled CPU nodes when probing ISA extensions
- To: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- From: Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>
- Date: Tue, 10 Nov 2026 11:37:46 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Alistair Francis <alistair.francis@xxxxxxx>, Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Tue, 10 Nov 2026 10:38:07 +0000
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On Tue, 10 Nov 2026 10:27:56 +0100, Oleksii Kurochko
<oleksii.kurochko@xxxxxxxxx> wrote:
> riscv_fill_hwcap_from_isa_string() intersects the riscv,isa of every CPU
> node under /cpus, including the ones with status = "disabled". Such a
> hart is never used by Xen, yet it can still remove extensions from the
> host ISA: e.g. a disabled hart without the H extension makes Xen panic
> with "Xen requires extension: h", even though every hart Xen runs on
> implements it.
>
> [...]
Reviewed-by: Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>
--
Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>
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