On 30.09.2024 05:42, Jiqian Chen wrote: > Some domains are not aware of the pIRQ abstraction layer that maps > interrupt sources into Xen space interrupt numbers. pIRQs values are > only exposed to domains that have the option to route physical > interrupts over event channels. > > This creates issues for PCI-passthrough from a PVH domain, as some of > the passthrough related hypercalls use pIRQ as references to physical > interrupts on the system. One of such interfaces is > XEN_DOMCTL_irq_permission, used to grant or revoke access to > interrupts, takes a pIRQ as the reference to the interrupt to be > adjusted. > > Since PVH doesn't manage interrupts in terms of pIRQs, introduce a new > hypercall that allows setting interrupt permissions based on GSI value > rather than pIRQ. > > Note the GSI hypercall parameters is translated to an IRQ value (in > case there are ACPI overrides) before doing the checks. > > 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> > Reviewed-by: Daniel P. Smith <dpsm...@apertussolutions.com>
Acked-by: Jan Beulich <jbeul...@suse.com>
