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b=cV5eoI6yCYT+WisILZ4zH0tSjWDryYKEanlWryrvyvNsi5OseFkccxCuwlUdhWmcv cY1UzTOj3CYuD1I2VmdX7t6fbUAkz8h9b20bGufUAY4ggjIwrOWtc7dKkKJ5XqFSMi k5w9KznpMI/LAlWImgcNTs25uVLJ/OzTc/KhrLHFs4qWGZepd3VlAWx/qLcPSNnrOy ex9v22GPUwskvjXcMjW8wH6fdIiUPEmS8OLOhu6a9YzEBVDl+tpY86RcT5Z/IfhbgI 7MhAA8geXkqkdAuoZtePxY1hdz3Gcnmm/h7GA6uY78a6X8FoKdFF9sGbFc2VnbV58p lPToIz7dNIN3w== Date: Fri, 4 Oct 2024 17:22:50 -0700 From: Kees Cook To: Mark Brown Cc: Alexander Viro , Christian Brauner , Jan Kara , Eric Biederman , Catalin Marinas , Will Deacon , Jonathan Corbet , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Yury Khrustalev , Wilco Dijkstra , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org Subject: Re: [PATCH RFC v2 1/2] binfmt_elf: Wire up AT_HWCAP3 at AT_HWCAP4 Message-ID: <202410041721.0B633082@keescook> References: <20241004-arm64-elf-hwcap3-v2-0-799d1daad8b0@kernel.org> <20241004-arm64-elf-hwcap3-v2-1-799d1daad8b0@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241004-arm64-elf-hwcap3-v2-1-799d1daad8b0@kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: ECBD740003 X-Rspamd-Server: rspam01 X-Stat-Signature: 7r3mhxwxxiyznazyo1ixkq54jwiszedf X-HE-Tag: 1728087774-269871 X-HE-Meta: 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 LJX+qFuY OJrHHdpQ7fjJqpE1nfTU045sff9kBo18uKUcEW8SshlRMBaZXE6pTNE6cdVtMs1QCxXNyeGnRY4zrbdYnwd//u2LNtMStPnJqNe/ybsjZZmmD03qOAEMOCfuXZ0aNblnl9JxXD7m/+Tge476dmgGg0Ugv2fuQEnrow34UPkTjC0TYRHhXF58k9qREFJjUEJTfcJINKDdhO/uTFgbXVwXXJmKnxsiykWJkGxBIyXWoGd/fwiqXRk0eGTWnAQJbl5slA9CtWCwzNUfLipDwSiNgfJh2w3Mo8UyLq317YRdYg14IOBjPp1X+ai/uIBaiEC1fG31g 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 Fri, Oct 04, 2024 at 09:26:29PM +0100, Mark Brown wrote: > AT_HWCAP3 and AT_HWCAP4 were recently defined for use on PowerPC in commit > 3281366a8e79 ("uapi/auxvec: Define AT_HWCAP3 and AT_HWCAP4 aux vector, > entries"). Since we want to start using AT_HWCAP3 on arm64 add support for (Side note: I wonder what auxvec 29 and 30 used to be?) > exposing both these new hwcaps via binfmt_elf. This seems fine to me, feel free to carry this via the arm64 tree. Acked-by: Kees Cook -- Kees Cook