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Re: [XEN PATCH v7 1/5] xen/vpci: Clear all vpci status of device
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Oleksii K. <oleksii.kurochko@xxxxxxxxx>
- From: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- Date: Wed, 15 May 2024 10:27:05 -0400
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- Cc: Jiqian Chen <Jiqian.Chen@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, "George Dunlap" <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, "Daniel P . Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Huang Rui <Ray.Huang@xxxxxxx>
- Delivery-date: Wed, 15 May 2024 14:27:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 4/18/24 23:53, Jiqian Chen wrote:
> When a device has been reset on dom0 side, the vpci on Xen
> side won't get notification, so the cached state in vpci is
> all out of date compare with the real device state.
> To solve that problem, add a new hypercall to clear all vpci
> device state. When the state of device is reset on dom0 side,
> dom0 can call this hypercall to notify vpci.
>
> Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
> Reviewed-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Could we consider this patch for 4.19? It's independent of the rest of
this series, and it fixes a real issue observed on both Arm and x86. The
Linux counterpart has already been merged in linux-next [0].
[0]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20240515&id=b272722511d5e8ae580f01830687b8a6b2717f01
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