summaryrefslogtreecommitdiff
path: root/arch/arm
diff options
context:
space:
mode:
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 /arch/arm
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 'arch/arm')
-rw-r--r--arch/arm/xen/enlighten.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 07eb69f9e7df..1f9c3ba32833 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -443,6 +443,8 @@ static int __init xen_guest_init(void)
if (!xen_domain())
return 0;
+ xen_set_restricted_virtio_memory_access();
+
if (!acpi_disabled)
xen_acpi_guest_init();
else