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Re: [PATCH v1 1/2] xen/riscv: skip disabled CPU nodes when probing ISA extensions
- To: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 9 Nov 2026 14:16:39 +0100
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- Cc: 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>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 09 Nov 2026 13:16:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.11.2026 13:49, Oleksii Kurochko 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.
>
> Skip CPU nodes which aren't available.
>
> Fixes: f74ebf58b518 ("xen/riscv: identify specific ISA supported by cpu")
> Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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