[PATCH V3 4/8] xen/virtio: Enable restricted memory access using Xen grant mappings

[Boris Ostrovsky]

On 6/2/22 8:49 AM, Oleksandr wrote:
>
> On 31.05.22 00:00, Oleksandr Tyshchenko wrote:
>
> Hello all.
>
>> From: Juergen Gross <jgross at suse.com>
>>
>> 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 at suse.com>
>> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko at epam.com>
>> Reviewed-by: Stefano Stabellini <sstabellini at kernel.org>
>> ---
>> Changes V1 -> V2:
>>     - new patch, split required changes from commit:
>>      "[PATCH V1 3/6] xen/virtio: Add option to restrict memory access under Xen"
>>     - rework according to new platform_has() infrastructure
>>
>> Changes V2 -> V3:
>>     - add Stefano's R-b
>
> May I please ask for the ack or comments for x86 side here?
>
>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky at oracle.com>