On 17.06.2024 11:00, Jiqian Chen wrote: > The gsi of a passthrough device must be configured for it to be > able to be mapped into a hvm domU. > But When dom0 is PVH, the gsis don't get registered, it causes > the info of apic, pin and irq not be added into irq_2_pin list, > and the handler of irq_desc is not set, then when passthrough a > device, setting ioapic affinity and vector will fail. > > To fix above problem, on Linux kernel side, a new code will > need to call PHYSDEVOP_setup_gsi for passthrough devices to > register gsi when dom0 is PVH. > > So, add PHYSDEVOP_setup_gsi into hvm_physdev_op for above > purpose. > > Signed-off-by: Jiqian Chen <jiqian.c...@amd.com> > Signed-off-by: Huang Rui <ray.hu...@amd.com> > Signed-off-by: Jiqian Chen <jiqian.c...@amd.com> > --- > The code link that will call this hypercall on linux kernel side is as > follows: > https://lore.kernel.org/xen-devel/20240607075109.126277-3-jiqian.c...@amd.com/
One of my v9 comments was addressed, thanks. Repeating the other, unaddressed one here: "As to GSIs not being registered: If that's not a problem for Dom0's own operation, I think it'll also want/need explaining why what is sufficient for Dom0 alone isn't sufficient when pass-through comes into play." Jan
