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h=From:From:Subject:Subject:Date:Date:Message-Id:Message-Id:MIME-Version:Content-Type:Content-Transfer-Encoding:To:To:Cc:Cc:Reply-To; bh=xvVn8Y8fDCV94jW6KWPstvQM6iscLHTCd7/u3m0LTfs=; b=Kk64iPFI+la3xEnrUdP/iMSv4DN3klAcgpqq6/2/+TlCJtHMPHebO7xQSru3T9yo nl8kptpnWtNeFYSQ42Gx7vcAMKQ+9NvwhTWYAtvnKWa70X3raaYLKMt5iNb/uNmMpRe YuXUUJch71o9EA/Omge/4HBzngexmCiudXsqgvoY= Received: by smtp.zohomail.com with SMTPS id 1792541206606520.137903256707; Tue, 20 Oct 2026 17:06:46 -0700 (PDT) From: Deborah Brouwer Subject: [PATCH v4 0/3] drm/tyr: allow mismatched buffers for dev_query Date: Tue, 20 Oct 2026 17:06:44 -0700 Message-Id: <20261020-b4-dev_query_fixes-v4-0-df66b4c98bc6@collabora.com> X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/33QS27DIBAG4KtYrEs1DA8Hr3qPqrJ4jBOkJCTYs WpFuXtxsmhURd0g/cB8MHNlI5VEI+uaKys0pzHlYw3qrWFh545b4inWzBDQCBCKe8Ujzf35QmX ph/RNI1cEzgMqtMqxWngqdD+odZ9fNe/SOOWy3N+Yxbr7LzcLDtwiKCkAvGrxI+T93vlc3HvIB 7aSMz4z+iWDlSFJJqIGDcG/YuQzY14ysjLDBloRopNa6L/M7dFxofOlTm96tP07vK5ZdbAoV31 7uvTpOOS6TNkv9TYPGJUe0EodNt2s1wF6NxKv+CFNXSOVbZ0CiUZ5sIp8NMJvfKu1MDpqQ220M ci2/uT2A7QKKhTPAQAA X-Change-ID: 20261014-b4-dev_query_fixes-4e0ab024294a To: Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , David Airlie , Simona Vetter Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Deborah Brouwer X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1980; i=deborah.brouwer@collabora.com; h=from:subject:message-id; bh=3mXYYH2Wyp7iMdOVfIyLyhIL3ZJckx+Ml8KpZV29isc=; b=owGbwMvMwCVWuULzOU9c7WvG02pJDFk3mERfTo/dHbnGdP7B+5tdf7y8z2Q7r3NNVohomLxKw L7vwlmtHaUsDGJcDLJiiixn7Y16xKveG+nO/98MM4eVCWQIAxenAEwkrp2RYe2anoJHPh9UcrpM 2DZM9Xf2iJdcd+ubcoQBr0TXDYfLKQy/2ew6i2Pr2/6c5l5am/vvUkpFyrqEtlf9DAsfrtqvfjq XGwA= X-Developer-Key: i=deborah.brouwer@collabora.com; a=openpgp; fpr=CD3F328C177AEF322D9FFF8379A829E70C5E7DEB Panthor UAPI for DRM_IOCTL_PANTHOR_DEV_QUERY allows userspace to provide a smaller or larger buffer than the kernel needs. Revise Tyr's implementation to match the expected UAPI behaviour. Signed-off-by: Deborah Brouwer --- This series depends on: [PATCH v5 0/2] drm/tyr: safely write GpuInfo to userspace https://lore.kernel.org/rust-for-linux/20261020-b4-gpu_info_intobytes-v5-0-3e0c7c93223c@collabora.com Changes in v4: - add new UserPtr method to accept u64 address - replace write_truncated() with write_slice_partial() - replace AsBytes with IntoBytes + Immutable in set_uobj - replace u32_as_usize with usize::from_safe_cast - remove redundant import size_of_val - Link to v3: https://lore.kernel.org/r/20261016-b4-dev_query_fixes-v3-0-f8071cda3515@collabora.com Changes in v3: - replace "as" cast with lossless u32_as_usize() - Link to v2: https://lore.kernel.org/r/20261015-b4-dev_query_fixes-v2-0-e3e6d25050cb@collabora.com Changes in v2: - Added #[inline] to UserSliceWriter::clear() - Link to v1: https://lore.kernel.org/r/20261014-b4-dev_query_fixes-v1-0-92043100b472@collabora.com --- Deborah Brouwer (3): rust: uaccess: add UserSliceWriter::clear() rust: uaccess: add method to get UserPtr from u64 drm/tyr: allow userspace buffers to be mismatched drivers/gpu/drm/tyr/file.rs | 49 +++++++++++++++++++++++++++++++++++++-------- rust/helpers/uaccess.c | 6 ++++++ rust/kernel/uaccess.rs | 33 ++++++++++++++++++++++++++++++ 3 files changed, 80 insertions(+), 8 deletions(-) --- base-commit: 3497a403264b094ebd61b8b755165d56e7d9dc37 change-id: 20261014-b4-dev_query_fixes-4e0ab024294a prerequisite-change-id: 20260923-b4-gpu_info_intobytes-c2d45f2935c8:v5 prerequisite-patch-id: 0ff3c9871f563680d2888d489cc155cc52788048 prerequisite-patch-id: ecf0aed0bd7e4f8d3bc1bbaabb02976fc8d5fa4d Best regards, -- Deborah Brouwer