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Re: [RFC XEN PATCH v9 5/5] domctl: Add XEN_DOMCTL_gsi_permission to grant gsi
- To: "Chen, Jiqian" <Jiqian.Chen@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 12 Jun 2024 13:43:45 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony@xxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, "Hildebrand, Stewart" <Stewart.Hildebrand@xxxxxxx>, "Huang, Ray" <Ray.Huang@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Daniel P . Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 12 Jun 2024 11:44:00 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12.06.2024 12:55, Chen, Jiqian wrote:
> On 2024/6/12 18:34, Jan Beulich wrote:
>> On 12.06.2024 12:12, Chen, Jiqian wrote:
>>> On 2024/6/11 22:39, Jan Beulich wrote:
>>>> On 07.06.2024 10:11, Jiqian Chen wrote:
>>>>> + r = xc_domain_gsi_permission(ctx->xch, domid, gsi, map);
>>>>
>>>> Looking at the hypervisor side, this will fail for PV Dom0. In which case
>>>> imo
>>>> you better would avoid making the call in the first place.
>>> Yes, for PV dom0, the errno is EOPNOTSUPP, then it will do below
>>> xc_domain_irq_permission.
>>
>> Hence why call xc_domain_gsi_permission() at all on a PV Dom0?
> Is there a function to distinguish that current dom0 is PV or PVH dom0 in
> tools/libs?
That's a question to the tools folks, I suppose?
Jan
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