Hi Paul,
Comment inlne.
On Wed, Jan 14, 2026 at 07:57:19PM -0700, Paul Walmsley wrote:
On Thu, 11 Dec 2025, Deepak Gupta via B4 Relay wrote:
From: Deepak Gupta <[email protected]>
VM_HIGH_ARCH_5 is used for riscv
Reviewed-by: Zong Li <[email protected]>
Reviewed-by: Alexandre Ghiti <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Tested-by: Andreas Korb <[email protected]>
Tested-by: Valentin Haudiquet <[email protected]>
Signed-off-by: Deepak Gupta <[email protected]>
Here's what I'm planning to queue, after updating it after Lorenzo's mm
changes. Please let me know if you want to change anything.
Yes looks good to me. Thanks a lot.
- Paul
From: Deepak Gupta <[email protected]>
Date: Wed, 19 Nov 2025 09:55:05 -0700
mm: add VM_SHADOW_STACK definition for riscv
VM_HIGH_ARCH_5 is used for riscv.
Reviewed-by: Zong Li <[email protected]>
Reviewed-by: Alexandre Ghiti <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Signed-off-by: Deepak Gupta <[email protected]>
Tested-by: Andreas Korb <[email protected]> # QEMU, custom CVA6
Tested-by: Valentin Haudiquet <[email protected]>
Link:
https://patch.msgid.link/[email protected]
[[email protected]: clarify subject; update to apply]
Signed-off-by: Paul Walmsley <[email protected]>
---
include/linux/mm.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 15076261d0c2..de912272c5f9 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -359,7 +359,7 @@ enum {
DECLARE_VMA_BIT_ALIAS(PKEY_BIT2, HIGH_ARCH_2),
DECLARE_VMA_BIT_ALIAS(PKEY_BIT3, HIGH_ARCH_3),
DECLARE_VMA_BIT_ALIAS(PKEY_BIT4, HIGH_ARCH_4),
-#if defined(CONFIG_X86_USER_SHADOW_STACK)
+#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_RISCV_USER_CFI)
/*
* VM_SHADOW_STACK should not be set with VM_SHARED because of lack of
* support core mm.
@@ -460,7 +460,8 @@ enum {
#define VM_PKEY_BIT4 VM_NONE
#endif /* CONFIG_ARCH_PKEY_BITS > 4 */
#endif /* CONFIG_ARCH_HAS_PKEYS */
-#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_ARM64_GCS)
+#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_ARM64_GCS) || \
+ defined(CONFIG_RISCV_USER_CFI)
#define VM_SHADOW_STACK INIT_VM_FLAG(SHADOW_STACK)
#else
#define VM_SHADOW_STACK VM_NONE
--
2.51.0
