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[v10,01/27] mm: VM_SHADOW_STACK definition for riscv

Message ID 20250210-v5_user_cfi_series-v10-1-163dcfa31c60@rivosinc.com (mailing list archive)
State New
Headers show
Series riscv control-flow integrity for usermode | expand

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Commit Message

Deepak Gupta Feb. 10, 2025, 8:26 p.m. UTC 
VM_HIGH_ARCH_5 is used for riscv

Signed-off-by: Deepak Gupta <debug@rivosinc.com>
---
 include/linux/mm.h | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b1068ddcbb7..1ef231cbc8fe 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -378,6 +378,13 @@  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