From: Paul Walmsley <pjw@kernel.org>
To: Deepak Gupta <debug@rivosinc.com>
Cc: "Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
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Subject: Re: [PATCH v26 01/28] mm: VM_SHADOW_STACK definition for riscv
Date: Wed, 14 Jan 2026 19:57:19 -0700 (MST) [thread overview]
Message-ID: <68e1702e-f803-2db2-0e16-53ecef4d9eb6@kernel.org> (raw)
In-Reply-To: <20251211-v5_user_cfi_series-v26-1-f0f419e81ac0@rivosinc.com>
On Thu, 11 Dec 2025, Deepak Gupta via B4 Relay wrote:
> From: Deepak Gupta <debug@rivosinc.com>
>
> VM_HIGH_ARCH_5 is used for riscv
>
> Reviewed-by: Zong Li <zong.li@sifive.com>
> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
> Acked-by: David Hildenbrand <david@redhat.com>
> Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de>
> Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
> Signed-off-by: Deepak Gupta <debug@rivosinc.com>
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.
- Paul
From: Deepak Gupta <debug@rivosinc.com>
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 <zong.li@sifive.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de> # QEMU, custom CVA6
Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
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
next prev parent reply other threads:[~2026-01-15 2:57 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-11 17:20 [PATCH v26 00/28] riscv control-flow integrity for usermode Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 01/28] mm: VM_SHADOW_STACK definition for riscv Deepak Gupta via B4 Relay
2026-01-15 2:57 ` Paul Walmsley [this message]
2025-12-11 17:20 ` [PATCH v26 02/28] dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml) Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 03/28] riscv: zicfiss / zicfilp enumeration Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 04/28] riscv: zicfiss / zicfilp extension csr and bit definitions Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 05/28] riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 07/28] riscv/mm: manufacture shadow stack pte Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 08/28] riscv/mm: teach pte_mkwrite to manufacture shadow stack PTEs Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 09/28] riscv/mm: write protect and shadow stack Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 10/28] riscv/mm: Implement map_shadow_stack() syscall Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 11/28] riscv/shstk: If needed allocate a new shadow stack on clone Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 12/28] riscv: Implements arch agnostic shadow stack prctls Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 13/28] prctl: arch-agnostic prctl for indirect branch tracking Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 14/28] riscv: Implements arch agnostic indirect branch tracking prctls Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 15/28] riscv/traps: Introduce software check exception and uprobe handling Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 16/28] riscv: signal: abstract header saving for setup_sigcontext Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 17/28] riscv/signal: save and restore of shadow stack for signal Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 18/28] riscv/kernel: update __show_regs to print shadow stack register Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 19/28] riscv/ptrace: riscv cfi status and state via ptrace and in core files Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 20/28] riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 21/28] riscv: kernel command line option to opt out of user cfi Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 22/28] riscv: enable kernel access to shadow stack memory via FWFT sbi call Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 23/28] arch/riscv: compile vdso with landing pad and shadow stack note Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 24/28] arch/riscv: dual vdso creation logic and select vdso based on hw Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 25/28] riscv: create a config for shadow stack and landing pad instr support Deepak Gupta via B4 Relay
2025-12-11 17:20 ` [PATCH v26 26/28] riscv: Documentation for landing pad / indirect branch tracking Deepak Gupta via B4 Relay
2025-12-11 17:21 ` [PATCH v26 27/28] riscv: Documentation for shadow stack on riscv Deepak Gupta via B4 Relay
2025-12-11 17:21 ` [PATCH v26 28/28] kselftest/riscv: kselftest for user mode cfi Deepak Gupta via B4 Relay
2025-12-12 5:50 ` [PATCH v26 00/28] riscv control-flow integrity for usermode patchwork-bot+linux-riscv
2025-12-12 8:15 ` Paul Walmsley
2025-12-12 8:30 ` Paul Walmsley
2025-12-12 18:33 ` Deepak Gupta
2026-01-08 15:10 ` Deepak Gupta
2026-01-08 16:25 ` Paul Walmsley
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