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authorJuergen Gross <jgross@suse.com>2022-06-02 22:23:49 +0300
committerJuergen Gross <jgross@suse.com>2022-06-06 17:07:30 +0300
commitfa1f57421e0b1c57843902c89728f823abc32f02 (patch)
treea7cfcba922c86058156d997e07180b269b321c34 /drivers/xen
parentd6aca3504c7ded5f4f46957e3685b9344d9743dd (diff)
downloadlinux-fa1f57421e0b1c57843902c89728f823abc32f02.tar.xz
xen/virtio: Enable restricted memory access using Xen grant mappings
In order to support virtio in Xen guests add a config option XEN_VIRTIO enabling the user to specify whether in all Xen guests virtio should be able to access memory via Xen grant mappings only on the host side. Also set PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS feature from the guest initialization code on Arm and x86 if CONFIG_XEN_VIRTIO is enabled. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Link: https://lore.kernel.org/r/1654197833-25362-5-git-send-email-olekstysh@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 313a9127fd5c..a7bd8ce7a1d2 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -339,4 +339,15 @@ config XEN_GRANT_DMA_OPS
bool
select DMA_OPS
+config XEN_VIRTIO
+ bool "Xen virtio support"
+ depends on VIRTIO
+ select XEN_GRANT_DMA_OPS
+ help
+ Enable virtio support for running as Xen guest. Depending on the
+ guest type this will require special support on the backend side
+ (qemu or kernel, depending on the virtio device types used).
+
+ If in doubt, say n.
+
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