xen: select grant interface version

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Grant v2 will be needed in cases where a frame number in the grant
table can exceed 32 bits. For PV guests this is a host feature, while
for HVM guests this is a guest feature.

So select grant v2 in case frame numbers can be larger than 32 bits
and grant v1 else.

For testing purposes add a way to specify the grant interface version
via a boot parameter.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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Juergen Gross 2017-11-02 10:19:21 +01:00 • committed by Boris Ostrovsky

parent 223c8f3349

commit 8dca4d96c7

1 changed files with 33 additions and 2 deletions

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35

drivers/xen/grant-table.c

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