On Mon, 7 Sep 2020 11:39:06 +0200 Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote: > An architecture may restrict host access to guest memory, > e.g. IBM s390 Secure Execution or AMD SEV. > > Provide a new Kconfig entry the architecture can select, > CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS, when it provides > the arch_has_restricted_virtio_memory_access callback to advertise > to VIRTIO common code when the architecture restricts memory access > from the host. > > The common code can then fail the probe for any device where > VIRTIO_F_ACCESS_PLATFORM is required, but not set. > > Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> > Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx> Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx> [..] > > +config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS > + bool > + help > + This option is selected if the architecture may need to enforce > + VIRTIO_F_IOMMU_PLATFORM. > + A small nit: you use F_ACCESS_PLATFORM everywhere but here. Regards, Halil
