[PATCH v2 13/23] xen/arm: get privilege status

Stefano Stabellini
2012-08-06T14:56:33Z

Use Xen features to figure out if we are privileged.

XENFEAT_dom0 was introduced by 23735 in xen-unstable.hg.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
arch/arm/xen/enlighten.c | 7 +++++++
include/xen/interface/features.h | 3 +++
2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 102d823..ac3a2d6 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -1,6 +1,7 @@
#include <xen/xen.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
+#include <xen/features.h>
#include <xen/platform_pci.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
@@ -57,6 +58,12 @@ static int __init xen_guest_init(void)
}
xen_domain_type = XEN_HVM_DOMAIN;

+ xen_setup_features();
+ if (xen_feature(XENFEAT_dom0))
+ xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED;
+ else
+ xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED);
+
if (!shared_info_page)
shared_info_page = (struct shared_info *)
get_zeroed_page(GFP_KERNEL);
diff --git a/include/xen/interface/features.h b/include/xen/interface/features.h
index b6ca39a..131a6cc 100644
--- a/include/xen/interface/features.h
+++ b/include/xen/interface/features.h
@@ -50,6 +50,9 @@
/* x86: pirq can be used by HVM guests */
#define XENFEAT_hvm_pirqs 10

+/* operation as Dom0 is supported */
+#define XENFEAT_dom0 11
+
#define XENFEAT_NR_SUBMAPS 1

#endif /* __XEN_PUBLIC_FEATURES_H__ */
--
1.7.2.5