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Commit 4ed5978b authored by Stefano Stabellini's avatar Stefano Stabellini Committed by Konrad Rzeszutek Wilk
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xen/xen_initial_domain: check that xen_start_info is initialized 



Since commit commit 4c071ee5 ("arm:
initial Xen support") PV on HVM guests can be xen_initial_domain.
However PV on HVM guests might have an unitialized xen_start_info, so
check before accessing its fields.

Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: default avatarIan Campbell <Ian.Campbell@citrix.com>
Reported-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 2e3d8860

include/xen/xen.h

+1 −1
Original line number Diff line number Diff line
@@ -24,7 +24,7 @@ extern enum xen_domain_type xen_domain_type; 
#include <asm/xen/hypervisor.h>



#define xen_initial_domain()	(xen_domain() && \

				 xen_start_info->flags & SIF_INITDOMAIN)

				 xen_start_info && xen_start_info->flags & SIF_INITDOMAIN)

#else  /* !CONFIG_XEN_DOM0 */

#define xen_initial_domain()	(0)

#endif	/* CONFIG_XEN_DOM0 */