Re: [PATCH v9 2/2] s390: virtio: PV needs VIRTIO I/O device protection

2020-08-21 Thread Pierre Morel
On 2020-08-21 14:05, Cornelia Huck wrote: On Wed, 19 Aug 2020 18:23:18 +0200 Pierre Morel wrote: If protected virtualization is active on s390, VIRTIO has retricted s/retricted/only restricted/ access to the guest memory. Define CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS and

Re: [PATCH v9 2/2] s390: virtio: PV needs VIRTIO I/O device protection

2020-08-21 Thread Cornelia Huck
On Wed, 19 Aug 2020 18:23:18 +0200 Pierre Morel wrote: > If protected virtualization is active on s390, VIRTIO has retricted s/retricted/only restricted/ > access to the guest memory. > Define CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS and export > arch_has_restricted_virtio_memory_access

[PATCH v9 2/2] s390: virtio: PV needs VIRTIO I/O device protection

2020-08-19 Thread Pierre Morel
If protected virtualization is active on s390, VIRTIO has retricted access to the guest memory. Define CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS and export arch_has_restricted_virtio_memory_access to advertize VIRTIO if that's the case, preventing a host error on access attempt.