[PATCH v2] allow xenfb initialization for hvm guests

There is no reasons why an HVM guest shouldn't be allowed to use xenfb.
As a matter of fact ARM guests, HVM from Linux POV, can use xenfb.
Given that no Xen toolstacks configure a xenfb backend for x86 HVM
guests, they are not affected.

Please note that at this time QEMU needs few outstanding fixes to
provide xenfb on ARM:

http://marc.info/?l=qemu-devel&m8739419700837&w=2

Signed-off-by: Stefano Stabellini <redacted>
Acked-by: David Vrabel <redacted>
CC: boris.ostrovsky@oracle.com
CC: plagnioj@jcrosoft.com
CC: tomi.valkeinen@ti.com
CC: linux-fbdev@vger.kernel.org
CC: konrad.wilk@oracle.com
---
 drivers/video/xen-fbfront.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index cd005c2..02e1c01 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c

@@ -692,7 +692,7 @@ static DEFINE_XENBUS_DRIVER(xenfb, ,
 
 static int __init xenfb_init(void)
 {
-	if (!xen_pv_domain())
+	if (!xen_domain())
 		return -ENODEV;
 
 	/* Nothing to do if running in dom0. */

-- 
1.7.10.4

On Fri, Jan 03, 2014 at 07:02:09PM +0000, Stefano Stabellini wrote:

The title needs 'xen/fb' prefixed but that is easy enough.

There is no reasons why an HVM guest shouldn't be allowed to use xenfb.
As a matter of fact ARM guests, HVM from Linux POV, can use xenfb.
Given that no Xen toolstacks configure a xenfb backend for x86 HVM
guests, they are not affected.

Please note that at this time QEMU needs few outstanding fixes to
provide xenfb on ARM:

http://marc.info/?l=qemu-devel&m8739419700837&w=2

Cool. Is the video maintainer OK with the Xen maintainers stashing it
in the Xen tree for Linus?

Thanks!

On 2014-01-03 22:34, Konrad Rzeszutek Wilk wrote:

On Fri, Jan 03, 2014 at 07:02:09PM +0000, Stefano Stabellini wrote:

The title needs 'xen/fb' prefixed but that is easy enough.

quoted

There is no reasons why an HVM guest shouldn't be allowed to use xenfb.
As a matter of fact ARM guests, HVM from Linux POV, can use xenfb.
Given that no Xen toolstacks configure a xenfb backend for x86 HVM
guests, they are not affected.

Please note that at this time QEMU needs few outstanding fixes to
provide xenfb on ARM:

http://marc.info/?l=qemu-devel&m=138739419700837&w=2

Cool. Is the video maintainer OK with the Xen maintainers stashing it
in the Xen tree for Linus?

Yep, fine for me.

 Tomi