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Tue, 19 Dec 2023 20:13:42 -0800 (PST) References: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> User-agent: mu4e 1.10.8; emacs 29.1 From: Thiago Jung Bauermann To: Mark Brown Cc: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v7 00/39] arm64/gcs: Provide support for GCS in userspace In-reply-to: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> Date: Wed, 20 Dec 2023 01:13:41 -0300 Message-ID: <874jgdh5oq.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: B65E31C000B X-Stat-Signature: 81n1n9dddmqynkmhce4swz4ih15koy3x X-HE-Tag: 1703045624-703526 X-HE-Meta: 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 AsXb9QEM PT/BC6HTGsnG1aEVo9ixq8Xopi6usuqfJNH9B3oZJCjXaSfoCK/XRGNQfu3MPjwdx0id5DCEY0rl1F6EVo/xIVy4JyAM6KBoOCJgp9CFXjQh+3hrxj72Qhx0aRb7Iv3KoNr08icMxy/+rEsWpA+xMh1EmEu22Fx/V/qfIfwYtHldb6GrB5zVoajjtG4zVFvVYmZGfj3qvS1ByIcKXmG+Lxo8vIQN9Ez/HoF1z66U6FDZJtkmP43wPg4zwJAOz3fVW3SSTHjmYbDUE63592xuIoT+s7Or9qLdmNv5ou0NRQqWlhVubAqwBCh046YRVIWhdtwnYNAxea0EttT3emSiouJIWc0JioOMpBBvv4pyWxeKsdWr8CXNVYlY0gb0c1ohA9BFb1VbVW4tY7KnTZ7BY8eQGZ+JpHCUkvlot2znfuo9HJXHiNXnOLT84NA== 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: Mark Brown writes: > arm64/mm: Restructure arch_validate_flags() for extensibility > prctl: arch-agnostic prctl for shadow stack > mman: Add map_shadow_stack() flags > arm64: Document boot requirements for Guarded Control Stacks > arm64/gcs: Document the ABI for Guarded Control Stacks > arm64/sysreg: Add new system registers for GCS > arm64/sysreg: Add definitions for architected GCS caps > arm64/gcs: Add manual encodings of GCS instructions > arm64/gcs: Provide put_user_gcs() > arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) > arm64/mm: Allocate PIE slots for EL0 guarded control stack > mm: Define VM_SHADOW_STACK for arm64 when we support GCS > arm64/mm: Map pages for guarded control stack > KVM: arm64: Manage GCS registers for guests > arm64/gcs: Allow GCS usage at EL0 and EL1 > arm64/idreg: Add overrride for GCS > arm64/hwcap: Add hwcap for GCS > arm64/traps: Handle GCS exceptions > arm64/mm: Handle GCS data aborts > arm64/gcs: Context switch GCS state for EL0 > arm64/gcs: Allocate a new GCS for threads with GCS enabled > arm64/gcs: Implement shadow stack prctl() interface > arm64/mm: Implement map_shadow_stack() > arm64/signal: Set up and restore the GCS context for signal handlers > arm64/signal: Expose GCS state in signal frames > arm64/ptrace: Expose GCS via ptrace and core files > arm64: Add Kconfig for Guarded Control Stack (GCS) > kselftest/arm64: Verify the GCS hwcap > kselftest/arm64: Add GCS as a detected feature in the signal tests > kselftest/arm64: Add framework support for GCS to signal handling tests > kselftest/arm64: Allow signals tests to specify an expected si_code > kselftest/arm64: Always run signals tests with GCS enabled > kselftest/arm64: Add very basic GCS test program > kselftest/arm64: Add a GCS test program built with the system libc > kselftest/arm64: Add test coverage for GCS mode locking > selftests/arm64: Add GCS signal tests > kselftest/arm64: Add a GCS stress test > kselftest/arm64: Enable GCS for the FP stress tests > kselftest/clone3: Enable GCS in the clone3 selftests Not sure if this is warranted, so sorry for the potential spam: I don't have any comments on the patches I haven't replied to. -- Thiago