x86/paravirt: add pte_flags to just get pte flags

Add pte_flags() to extract the flags from a pte.  This is a special
case of pte_val() which is only guaranteed to return the pte's flags
correctly; the page number may be corrupted or missing.

The intent is to allow paravirt implementations to return pte flags
without having to do any translation of the page number (most notably,
Xen).

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 4a372b71239d..1b4b5fa498b3 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1101,6 +1101,7 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
         .set_pmd = xen_set_pmd,
 
         .pte_val = xen_pte_val,
+        .pte_flags = native_pte_val,
         .pgd_val = xen_pgd_val,
 
         .make_pte = xen_make_pte,