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Re: [PATCH v2 3/4] PCI: don't look for ext-caps when there's no extended cfg space
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Thu, 29 Jan 2026 09:53:16 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- Delivery-date: Thu, 29 Jan 2026 08:53:28 +0000
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On Mon, Jan 19, 2026 at 03:47:29PM +0100, Jan Beulich wrote:
> Avoid interpreting as extended capabilities what may be about anything. In
> doing so, vPCI then also won't mis-interpret data from beyond base config
> space anymore.
>
> Fixes: 3b35911d709e ("Enable pci mmcfg and ATS for x86_64")
> Fixes: a845b50c12f3 ("vpci/header: Emulate extended capability list for dom0")
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> ---
> Because of the multiple prereq changes, despite the Fixes: tags I'm not
> quite sure whether to backport this. (I'm leaning towards "no".)
I won't backport, prereq changes are too intrusive.
Thanks, Roger.
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