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Re: [RFC XEN PATCH 5/6] tools/libs/call: add linux os call to get gsi from irq
- To: Huang Rui <ray.huang@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 14 Mar 2023 17:36:57 +0100
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- Cc: 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>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 14 Mar 2023 16:37:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12.03.2023 08:54, Huang Rui wrote:
> From: Chen Jiqian <Jiqian.Chen@xxxxxxx>
>
> When passthrough gpu to guest, usersapce can only get irq
> instead of gsi. But it should pass gsi to guest, so that
> guest can get interrupt signal. So, provide function to get
> gsi.
>
> Signed-off-by: Chen Jiqian <Jiqian.Chen@xxxxxxx>
> Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> ---
> tools/include/xen-sys/Linux/privcmd.h | 7 +++++++
Assuming this information needs obtaining in the first place (which I
doubt), I don't think privcmd is the right vehicle to get at it. Can
one obtain such mapping information on baremetal Linux? If so, that
would want re-using in the same or a similar way. If not, there would
need to be a very good reason why the information is needed when
running on top of Xen.
Jan
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