From: Randy Dunlap <rdunlap@infradead.org>
To: "Deepak Gupta" <debug@rivosinc.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Conor Dooley" <conor@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Christian Brauner" <brauner@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Oleg Nesterov" <oleg@redhat.com>,
"Eric Biederman" <ebiederm@xmission.com>,
"Kees Cook" <kees@kernel.org>, "Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <shuah@kernel.org>, "Jann Horn" <jannh@google.com>,
"Conor Dooley" <conor+dt@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Benno Lossin" <lossin@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-riscv@lists.infradead.org,
devicetree@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
alistair.francis@wdc.com, richard.henderson@linaro.org,
jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com,
charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com,
cleger@rivosinc.com, alexghiti@rivosinc.com,
samitolvanen@google.com, broonie@kernel.org,
rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org,
Paul Walmsley <pjw@kernel.org>,
Valentin Haudiquet <valentin.haudiquet@canonical.com>
Subject: Re: [PATCH v24 21/28] riscv: kernel command line option to opt out of user cfi
Date: Thu, 4 Dec 2025 14:13:49 -0800 [thread overview]
Message-ID: <20273cd5-afbc-4208-aa2a-11ac04256c38@infradead.org> (raw)
In-Reply-To: <20251204-v5_user_cfi_series-v24-21-ada7a3ba14dc@rivosinc.com>
On 12/4/25 12:04 PM, Deepak Gupta wrote:
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 6c42061ca20e..453127ef8746 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -6453,6 +6453,14 @@
> replacement properties are not found. See the Kconfig
> entry for RISCV_ISA_FALLBACK.
>
> + riscv_nousercfi=
> + all Disable user cfi ABI to userspace even if cpu extension
extensions
> + are available.
> + bcfi Disable user backward cfi ABI to userspace even if
> + shadow stack extension is available.
> + fcfi Disable user forward cfi ABI to userspace even if landing
> + pad extension is available.
> +
> ro [KNL] Mount root device read-only on boot
>
> rodata= [KNL,EARLY]
--
~Randy
next prev parent reply other threads:[~2025-12-04 22:14 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-04 20:03 [PATCH v24 00/28] riscv control-flow integrity for usermode Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 01/28] mm: VM_SHADOW_STACK definition for riscv Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 02/28] dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml) Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 03/28] riscv: zicfiss / zicfilp enumeration Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 04/28] riscv: zicfiss / zicfilp extension csr and bit definitions Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 05/28] riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 07/28] riscv/mm: manufacture shadow stack pte Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 08/28] riscv/mm: teach pte_mkwrite to manufacture shadow stack PTEs Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 09/28] riscv/mm: write protect and shadow stack Deepak Gupta
2025-12-04 20:03 ` [PATCH v24 10/28] riscv/mm: Implement map_shadow_stack() syscall Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 11/28] riscv/shstk: If needed allocate a new shadow stack on clone Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 12/28] riscv: Implements arch agnostic shadow stack prctls Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 13/28] prctl: arch-agnostic prctl for indirect branch tracking Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 14/28] riscv: Implements arch agnostic indirect branch tracking prctls Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 15/28] riscv/traps: Introduce software check exception and uprobe handling Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 16/28] riscv: signal: abstract header saving for setup_sigcontext Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 17/28] riscv/signal: save and restore of shadow stack for signal Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 18/28] riscv/kernel: update __show_regs to print shadow stack register Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 19/28] riscv/ptrace: riscv cfi status and state via ptrace and in core files Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 20/28] riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 21/28] riscv: kernel command line option to opt out of user cfi Deepak Gupta
2025-12-04 22:13 ` Randy Dunlap [this message]
2025-12-04 20:04 ` [PATCH v24 22/28] riscv: enable kernel access to shadow stack memory via FWFT sbi call Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 23/28] arch/riscv: compile vdso with landing pad and shadow stack note Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 24/28] arch/riscv: dual vdso creation logic and select vdso based on hw Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 25/28] riscv: create a config for shadow stack and landing pad instr support Deepak Gupta
2025-12-04 22:17 ` Randy Dunlap
2025-12-05 18:24 ` Deepak Gupta
2025-12-05 19:41 ` Randy Dunlap
2025-12-04 20:04 ` [PATCH v24 26/28] riscv: Documentation for landing pad / indirect branch tracking Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 27/28] riscv: Documentation for shadow stack on riscv Deepak Gupta
2025-12-04 20:04 ` [PATCH v24 28/28] kselftest/riscv: kselftest for user mode cfi Deepak Gupta
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