arm64: Add PTE_HYP_XN page table flag

EL2 page tables can be configured to deny code from being
executed, which is done by setting bit 54 in the page descriptor.

It is the same bit as PTE_UXN, but the "USER" reference felt odd
in the hypervisor code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 2813748e2f242c7cd5466783ff55e59947e9e202..c3ae239db3eeec5ad19e1e237a998ea82b834268 100644 (file)
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -164,6 +164,7 @@
 #define PTE_CONT               (_AT(pteval_t, 1) << 52)        /* Contiguous range */
 #define PTE_PXN                        (_AT(pteval_t, 1) << 53)        /* Privileged XN */
 #define PTE_UXN                        (_AT(pteval_t, 1) << 54)        /* User XN */
+#define PTE_HYP_XN             (_AT(pteval_t, 1) << 54)        /* HYP XN */
 
 /*
  * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).