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    Subject[PATCH v3 13/25] xen/arm: get privilege status
    Date
    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>
    ---
    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 78ea1f7..e529662 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>
    @@ -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 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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