diff mbox series

[v11,01/27] mm: VM_SHADOW_STACK definition for riscv

Message ID 20250310-v5_user_cfi_series-v11-1-86b36cbfb910@rivosinc.com (mailing list archive)
State New
Headers show
Series riscv control-flow integrity for usermode | expand

Commit Message

Deepak Gupta March 10, 2025, 2:52 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(+)

Comments

Zong Li March 14, 2025, 8:27 a.m. UTC | #1 
On Mon, Mar 10, 2025 at 11:42 PM Deepak Gupta <debug@rivosinc.com> wrote:
>
> 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(+)
>
> 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
>

LGTM.

Reviewed-by: Zong Li <zong.li@sifive.com>

> --
> 2.34.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
diff mbox series

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