diff options
| author | Pierre Morel <pmorel@linux.ibm.com> | 2020-09-10 10:53:49 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-10-21 16:34:12 +0200 |
| commit | 0afa15e1a5294754066343cad24af5ec8edae96d (patch) | |
| tree | 64e15eeb034e2bfb937aaf6def594750032712b8 /drivers/virtio/Kconfig | |
| parent | vhost_vdpa: Fix duplicate included kernel.h (diff) | |
| download | linux-0afa15e1a5294754066343cad24af5ec8edae96d.tar.xz linux-0afa15e1a5294754066343cad24af5ec8edae96d.zip | |
virtio: let arch advertise guest's memory access restrictions
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@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/1599728030-17085-2-git-send-email-pmorel@linux.ibm.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'drivers/virtio/Kconfig')
| -rw-r--r-- | drivers/virtio/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig index 5c92e4a50882..ef2d49430800 100644 --- a/drivers/virtio/Kconfig +++ b/drivers/virtio/Kconfig @@ -6,6 +6,12 @@ config VIRTIO bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG or CONFIG_S390_GUEST. +config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS + bool + help + This option is selected if the architecture may need to enforce + VIRTIO_F_ACCESS_PLATFORM + menuconfig VIRTIO_MENU bool "Virtio drivers" default y |