Juergen Gross b5e397a79e xen: add a global indicator for grant copy being available ... The Xen qdisk backend needs to test whether grant copy operations is available in the kernel. Unfortunately this collides with using xengnttab_set_max_grants() on some kernels as this operation has to be the first one after opening the gnttab device. In order to solve this problem test for the availability of grant copy in xen_be_init() opening the gnttab device just for that purpose and closing it again afterwards. Advertise the availability via a global flag and use that flag in the qdisk backend. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>		2017-10-26 14:23:06 -07:00
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io	xen: import ring.h from xen	2017-04-21 12:41:29 -07:00
xen_backend.h	xen: add a global indicator for grant copy being available	2017-10-26 14:23:06 -07:00
xen_common.h	xen: don't use xenstore to save/restore physmap anymore	2017-07-18 14:16:52 -07:00
xen_pvdev.h	xen: create qdev for each backend device	2016-11-22 10:29:39 -08:00
xen.h	xen: use libxendevice model to restrict operations	2017-04-21 12:40:14 -07:00