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    SubjectRe: [PATCH v2 13/23] xen/arm: get privilege status
    On Mon, Aug 06, 2012 at 03:27:16PM +0100, Stefano Stabellini wrote:
    > Use Xen features to figure out if we are privileged.
    >
    > XENFEAT_dom0 was introduced by 23735 in xen-unstable.hg.

    Looks good.

    >
    > 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


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