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Re: [RFC XEN PATCH v2 2/3] x86/pvh: Open PHYSDEVOP_map_pirq for PVH dom0
- To: Jiqian Chen <Jiqian.Chen@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 28 Nov 2023 16:14:44 +0100
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- Cc: Stewart Hildebrand <Stewart.Hildebrand@xxxxxxx>, Alex Deucher <Alexander.Deucher@xxxxxxx>, Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxx>, Huang Rui <Ray.Huang@xxxxxxx>, Honglei Huang <Honglei1.Huang@xxxxxxx>, Julia Zhang <Julia.Zhang@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 28 Nov 2023 15:14:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 24.11.2023 11:41, Jiqian Chen wrote:
> --- a/xen/arch/x86/hvm/hypercall.c
> +++ b/xen/arch/x86/hvm/hypercall.c
> @@ -74,6 +74,8 @@ long hvm_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void)
> arg)
> {
> case PHYSDEVOP_map_pirq:
> case PHYSDEVOP_unmap_pirq:
> + if (is_hardware_domain(currd))
> + break;
> case PHYSDEVOP_eoi:
> case PHYSDEVOP_irq_status_query:
> case PHYSDEVOP_get_free_pirq:
If you wouldn't go the route suggested by Roger, I think you will need
to deny self-mapping requests here.
Also note that both here and in patch 1 you will want to adjust a number
of style violations.
Jan
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