Re: [PATCH v12 01/28] mm: VM_SHADOW_STACK definition for riscv

[Alexandre Ghiti]

Hi Deepak,

On 14/03/2025 22:39, Deepak Gupta wrote:

VM_HIGH_ARCH_5 is used for riscv

Reviewed-by: Zong Li <zong...@sifive.com>
Signed-off-by: Deepak Gupta <de...@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 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

Reviewed-by: Alexandre Ghiti <alexgh...@rivosinc.com>

Thanks,

Alex