xen/arm: get privilege status

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>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 6a0217d4e6620a6b5ae630d55a169de9df222b34..c2a47a7248707c946405a6454a05bdb1d563d7a6 100644 (file)
--- 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>
@@ -66,6 +67,12 @@ 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 b6ca39a069d80c984962db4659e2f9bbe3256573..131a6ccdba25693e6899b7813d99a6934e846ce4 100644 (file)
--- 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__ */