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Re: [PATCH] x86: kexec is PV-only
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 30 Jun 2026 14:37:45 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Tue, 30 Jun 2026 13:38:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 30/06/2026 2:35 pm, Jan Beulich wrote:
> Kexec is of no use without its hypercall, and that hypercall is wired up
> only for PV. Allowing that code to be built when !PV therefore results in
> a lot of unreachable code, violating Misra C:2012 rule 2.1.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> --- a/xen/arch/x86/Kconfig
> +++ b/xen/arch/x86/Kconfig
> @@ -22,7 +22,7 @@ config X86
> select HAS_EX_TABLE
> select HAS_FAST_MULTIPLY
> select HAS_IOPORTS
> - select HAS_KEXEC
> + select HAS_KEXEC if PV
> select HAS_NS16550
> select HAS_PASSTHROUGH
> select HAS_PCI
This might be true, but it's wrong. kexec should be wired up for PVH
too, and I don't see any reason why it can't be.
~Andrew
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