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Re: [RFC XEN PATCH 4/6] x86/pvh: PVH dom0 also need PHYSDEVOP_setup_gsi call
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 16 Mar 2023 09:51:20 +0100
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- Cc: Huang Rui <ray.huang@xxxxxxx>, Alex Deucher <alexander.deucher@xxxxxxx>, Christian König <christian.koenig@xxxxxxx>, Stewart Hildebrand <Stewart.Hildebrand@xxxxxxx>, Xenia Ragiadakou <burzalodowa@xxxxxxxxx>, Honglei Huang <honglei1.huang@xxxxxxx>, Julia Zhang <julia.zhang@xxxxxxx>, Chen Jiqian <Jiqian.Chen@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Thu, 16 Mar 2023 08:51:36 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16.03.2023 01:26, Stefano Stabellini wrote:
> On Wed, 15 Mar 2023, Andrew Cooper wrote:
>> On 14/03/2023 4:30 pm, Jan Beulich wrote:
>>> On 12.03.2023 08:54, Huang Rui wrote:
>>>> From: Chen Jiqian <Jiqian.Chen@xxxxxxx>
>>> An empty description won't do here. First of all you need to address the
>>> Why?
>>> As already hinted at in the reply to the earlier patch, it looks like you're
>>> breaking the intended IRQ model for PVH.
>>
>> I think this is rather unfair.
>>
>> Until you can point to the document which describes how IRQs are
>> intended to work in PVH, I'd say this series is pretty damn good attempt
>> to make something that functions, in the absence of any guidance.
>
> And to make things more confusing those calls are not needed for PVH
> itself, those calls are needed so that we can run QEMU to support
> regular HVM guests on PVH Dom0 (I'll let Ray confirm.)
Ah, but that wasn't said anywhere, was it? In which case ...
> So technically, this is not breaking the PVH IRQ model.
... I of course agree here. But then I guess we may want to reject
attempts for a domain to do any of this to itself.
Jan
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