Re: [PATCH v26 01/28] mm: VM_SHADOW_STACK definition for riscv
From: Deepak Gupta <hidden>
Date: 2026-01-26 21:56:25
Also in:
linux-arch, linux-doc, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, rust-for-linux
Hi Paul, Comment inlne. On Wed, Jan 14, 2026 at 07:57:19PM -0700, Paul Walmsley wrote:
On Thu, 11 Dec 2025, Deepak Gupta via B4 Relay wrote:quoted
From: Deepak Gupta <redacted> VM_HIGH_ARCH_5 is used for riscv Reviewed-by: Zong Li <redacted> Reviewed-by: Alexandre Ghiti <redacted> Acked-by: David Hildenbrand <redacted> Tested-by: Andreas Korb <redacted> Tested-by: Valentin Haudiquet <redacted> Signed-off-by: Deepak Gupta <redacted>Here's what I'm planning to queue, after updating it after Lorenzo's mm changes. Please let me know if you want to change anything.
Yes looks good to me. Thanks a lot.
quoted hunk ↗ jump to hunk
- Paul From: Deepak Gupta <redacted> Date: Wed, 19 Nov 2025 09:55:05 -0700 mm: add VM_SHADOW_STACK definition for riscv VM_HIGH_ARCH_5 is used for riscv. Reviewed-by: Zong Li <redacted> Reviewed-by: Alexandre Ghiti <redacted> Acked-by: David Hildenbrand <redacted> Signed-off-by: Deepak Gupta <redacted> Tested-by: Andreas Korb <redacted> # QEMU, custom CVA6 Tested-by: Valentin Haudiquet <redacted> Link: https://patch.msgid.link/20251112-v5_user_cfi_series-v23-1-b55691eacf4f@rivosinc.com [pjw@kernel.org: clarify subject; update to apply] Signed-off-by: Paul Walmsley <pjw@kernel.org> --- include/linux/mm.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)diff --git a/include/linux/mm.h b/include/linux/mm.h index 15076261d0c2..de912272c5f9 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h@@ -359,7 +359,7 @@ enum {DECLARE_VMA_BIT_ALIAS(PKEY_BIT2, HIGH_ARCH_2), DECLARE_VMA_BIT_ALIAS(PKEY_BIT3, HIGH_ARCH_3), DECLARE_VMA_BIT_ALIAS(PKEY_BIT4, HIGH_ARCH_4), -#if defined(CONFIG_X86_USER_SHADOW_STACK) +#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_RISCV_USER_CFI) /* * VM_SHADOW_STACK should not be set with VM_SHARED because of lack of * support core mm.@@ -460,7 +460,8 @@ enum {#define VM_PKEY_BIT4 VM_NONE #endif /* CONFIG_ARCH_PKEY_BITS > 4 */ #endif /* CONFIG_ARCH_HAS_PKEYS */ -#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_ARM64_GCS) +#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_ARM64_GCS) || \ + defined(CONFIG_RISCV_USER_CFI) #define VM_SHADOW_STACK INIT_VM_FLAG(SHADOW_STACK) #else #define VM_SHADOW_STACK VM_NONE -- 2.51.0