On 15.06.22 11:48, Juergen Gross wrote:
Hello Juergen
Commit fa1f57421e0b ("xen/virtio: Enable restricted memory access using
Xen grant mappings") introduced a new requirement for using virtio
devices: the backend now needs to support the VIRTIO_F_ACCESS_PLATFORM
feature.
This is an undue requirement for non-PV guests, as those can be operated
with existing backends without any problem, as long as those backends
are running in dom0.
Per default allow virtio devices without grant support for non-PV
guests.
The setting can be overridden by using the new "xen_virtio_grant"
command line parameter.
Add a new config item to always force use of grants for virtio.
Fixes: fa1f57421e0b ("xen/virtio: Enable restricted memory access using Xen grant mappings")
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Thank you for the fix.
I have tested it on Arm64 guest (XEN_HVM_DOMAIN), it works.
With the "__init" fix (pointed out by Viresh) applied you can add my:
Tested-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx> #Arm64 only
[snip]
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Regards,
Oleksandr Tyshchenko
