[PATCH v26 01/28] mm: VM_SHADOW_STACK definition for riscv

Deepak Gupta via B4 Relay
2025-12-11T17:21:06Z

VM_HIGH_ARCH_5 is used for riscv

Reviewed-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Acked-by: David Hildenbrand <david@redhat.com>
Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de>
Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
---
include/linux/mm.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d16b33bacc32..2032d3f195f1 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -380,6 +380,13 @@ extern unsigned int kobjsize(const void *objp);
# define VM_SHADOW_STACK VM_HIGH_ARCH_6
#endif

+#if defined(CONFIG_RISCV_USER_CFI)
+/*
+ * Following x86 and picking up the same bitpos.
+ */
+# define VM_SHADOW_STACK VM_HIGH_ARCH_5
+#endif
+
#ifndef VM_SHADOW_STACK
# define VM_SHADOW_STACK VM_NONE
#endif

--
2.43.0