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Re: [XEN PATCH v12 1/7] xen/pci: Add hypercall to support reset of pcidev
- To: Jiqian Chen <Jiqian.Chen@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 8 Jul 2024 16:56:32 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony@xxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, "Daniel P . Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Stewart Hildebrand <Stewart.Hildebrand@xxxxxxx>, Huang Rui <ray.huang@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 08 Jul 2024 14:56:52 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.07.2024 13:41, Jiqian Chen wrote:
> When a device has been reset on dom0 side, the Xen hypervisor
> doesn'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 out of date compare with the real device state.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 support the reset
> of pcidev and clear the vpci state of device. So that once the
> state of device is reset on dom0 side, dom0 can call this
> hypercall to notify hypervisor.
>
> Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
> 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>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Just to double check: You're sure the other two R-b are still applicable,
despite the various changes that have been made?
As a purely cosmetic remark: I think I would have preferred if the new
identifiers didn't have "state" as a part; I simply don't think this adds
much value, while at the same time making these pretty long.
Jan
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