diff mbox series

[v3,03/17] arm64: Document SW reserved PTE/PMD bits in Stage-2 descriptors

Message ID 20200706125425.1671020-4-maz@kernel.org (mailing list archive)
State Mainlined
Commit 6fcfdf6d72898d1c5118d7dd3d3d38690e2f6a64
Headers show
Series KVM: arm64: Preliminary NV patches | expand

Commit Message

Marc Zyngier July 6, 2020, 12:54 p.m. UTC 
Advertise bits [58:55] as reserved for SW in the S2 descriptors.

Reviewed-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/include/asm/pgtable-hwdef.h | 2 ++
 1 file changed, 2 insertions(+)

Comments

Catalin Marinas July 6, 2020, 5:25 p.m. UTC | #1 
On Mon, Jul 06, 2020 at 01:54:11PM +0100, Marc Zyngier wrote:
> Advertise bits [58:55] as reserved for SW in the S2 descriptors.
> 
> Reviewed-by: Andrew Scull <ascull@google.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 9c91a8f93a0e..de0b603955f4 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -178,10 +178,12 @@ 
 #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] */