Hi Andrew,
On 2020-05-05 16:59, Andrew Scull wrote:
On Wed, Apr 22, 2020 at 01:00:29PM +0100, Marc Zyngier wrote:
Advertise bits [58:55] as reserved for SW in the S2 descriptors.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/include/asm/pgtable-hwdef.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h
b/arch/arm64/include/asm/pgtable-hwdef.h
index 6bf5e650da788..7eab0d23cdb52 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -177,10 +177,12 @@
#define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */
#define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */
#define PTE_S2_XN (_AT(pteval_t, 2) << 53) /* XN[1:0] */
+#define PTE_S2_SW_RESVD (_AT(pteval_t, 15) << 55) /* Reserved for SW
*/
#define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */
#define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */
#define PMD_S2_XN (_AT(pmdval_t, 2) << 53) /* XN[1:0] */
+#define PMD_S2_SW_RESVD (_AT(pmdval_t, 15) << 55) /* Reserved for SW
*/
#define PUD_S2_RDONLY (_AT(pudval_t, 1) << 6) /* HAP[2:1] */
#define PUD_S2_RDWR (_AT(pudval_t, 3) << 6) /* HAP[2:1] */
--
2.26.1
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This is consistent with "Attribute fields in stage 1 VMSAv8-64 Block
and
Page descriptors"
Do you mean "stage 2" instead? The reserved bits are the same, but I
want
to be sure we have looked at the same thing (ARM DDI 0487F.a, D5-2603).
Reviewed-by: Andrew Scull <ascull@xxxxxxxxxx>
Thanks,
M.
--
Jazz is not dead. It just smells funny...
