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Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Christian Brauner , Peter Zijlstra , Oleg Nesterov , Eric Biederman , Kees Cook , Jonathan Corbet , Shuah Khan , Jann Horn , Conor Dooley , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?ISO-8859-15?Q?Bj=F6rn_Roy_Baron?= , Andreas Hindborg , Alice Ryhl , Trevor Gross , Benno Lossin , 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, Zong Li Subject: Re: [PATCH v22 03/28] riscv: zicfiss / zicfilp enumeration In-Reply-To: <20251023-v5_user_cfi_series-v22-3-1d53ce35d8fd@rivosinc.com> Message-ID: <9230fa65-6b8e-ebf6-f215-b3a3bb7357d9@kernel.org> References: <20251023-v5_user_cfi_series-v22-0-1d53ce35d8fd@rivosinc.com> <20251023-v5_user_cfi_series-v22-3-1d53ce35d8fd@rivosinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: CC7A140006 X-Rspamd-Server: rspam11 X-Rspam-User: X-Stat-Signature: tg38sgsjh6jqabw4wt4a671h5inxmzwg X-HE-Tag: 1761938552-849306 X-HE-Meta: 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 X6OSSAI+ fEZ07gGJvHjTaCb6w/XVSu3qDwbMFpWsgIccHLL9tWMKM5e9mlai5oeCLuOFcNmlZHpKWFkhx4gRfmmkNpYpOK4MpzvBF09ajKJW93L+kRl5D0iYhPv9mdjHfvAioCPGhGdxUCQuT/Cj48WYQtTt0t3MKroI4KUKe5VhS7BT9eV0tBhOyzo4HXg4ElRofDud7wVCRt9qu8/J/TPHZR+/LNyosgpZM/1KWgOnfTJ7EQ4D0xtQ355Ho4y+dtTzr9Rq5HTNFWh2jcJ/Vc4OSTDSvTrzo4/H4Dt5YiZFNmbsmc7/bKDUsPGsZnVG8zBe79YIl0OSCkzpK737fXZs5jh30omjcUgDvVhM0AGm6n90Ih2+nmrDrQQ+6ciyhdoPMR/sIYV7KGdtFm6Z9rFdvo6OOwL4XmMQgUiu17LZSwC1j4ptJuhHWr3+SU7QaHgKj63SuIYlU X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 23 Oct 2025, Deepak Gupta wrote: > This patch adds support for detecting zicfiss and zicfilp. zicfiss and > zicfilp stands for unprivleged integer spec extension for shadow stack > and branch tracking on indirect branches, respectively. > > This patch looks for zicfiss and zicfilp in device tree and accordinlgy > lights up bit in cpu feature bitmap. Furthermore this patch adds detection > utility functions to return whether shadow stack or landing pads are > supported by cpu. > > Reviewed-by: Zong Li > Reviewed-by: Alexandre Ghiti > Signed-off-by: Deepak Gupta This patch introduces some 'checkpatch.pl --strict' messages: CHECK: Alignment should match open parenthesis #68: FILE: arch/riscv/kernel/cpufeature.c:278: +static int riscv_cfilp_validate(const struct riscv_isa_ext_data *data, + const unsigned long *isa_bitmap) CHECK: Alignment should match open parenthesis #77: FILE: arch/riscv/kernel/cpufeature.c:287: +static int riscv_cfiss_validate(const struct riscv_isa_ext_data *data, + const unsigned long *isa_bitmap) I'll fix them up here in the event that v22 goes in, but please do the same on your side in case a new version is needed. thanks, - Paul