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

Alexandre Ghiti
2025-04-07T16:41:31Z

Hi Deepak,

On 14/03/2025 22:39, Deepak Gupta wrote:
> VM_HIGH_ARCH_5 is used for riscv
>
> Reviewed-by: Zong Li <zong.li@sifive.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 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 <alexghiti@rivosinc.com>

Thanks,

Alex