arm: map fixmaps non-executable.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 715a98a32a0b1f68e3e0f9f76ad5032ed25c9a54..40ac176ce302f4a9de79c605b4c8621ced51bdfe 100644 (file)
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -106,6 +106,7 @@ void set_fixmap(unsigned map, unsigned long mfn, unsigned attributes)
     lpae_t pte = mfn_to_xen_entry(mfn);
     pte.pt.table = 1; /* 4k mappings always have this bit set */
     pte.pt.ai = attributes;
+    pte.pt.xn = 1;
     write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte);
     flush_xen_data_tlb_va(FIXMAP_ADDR(map));
 }