From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794209690; b=Q75DFzkMkgIR4WbJCu6hd7MV0NI9F04jAmSwnOY7uM8qtypl4fbKSTG7iPQkfC3SIYmS bAj5LFX03lBEhf3YDod+6BZXoRh7fwN8x0WGwi23meE2iyEkIvSsxAn45jiMeWT9Fhipm ZlXz6erUf7QFIvzw8SX0oCZhNvAnp/OM28MxR6JnJ6R6+8Juqg39bDW61emD2tMTEbVZM 5mbRZ2Zw2DdjYE1mqmNvC3kGKNET8dCNQ2/8hVJOTM2dIbVHDFR5WHX7GQfStbckFlsGR HLIu5e8qQ48bi4R22F5cAe21NeCFlj9/xvwYRL6qalL/a+X2GZ9nZyU+Spf0Uj7C0eg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794209690; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Type:X-Mailer: Content-Transfer-Encoding; bh=Mz8AXu/UZmuCcqZREPjQc9nW4LF1v2AIqPDriU8p2gM=; b=ibHncncJYfnabNw2MQ0fUF1A7Ul9z2fxsGPPBUQAqnV3sFiFVnw0G1wSgp4MR+Sjsf+O Io8JCeQDl5FBwFWhYHyy8AbHZA61sgEu7seNoEy1bEb5kh0dul0yLj0w7SAF9WV3ThbK1 U0ZrCoSjKRiZUSvnBgycO2YVWKUuarghZgqcSK5GrYsrHaJLXQ4b/S/7sMS9alLe13c95 f6xZ8NQCvOn7TcAuBqb9j0cLiDcXndnYs73VhDmnpMNt7nch5b+AD9czJvUdZVNTkp139 BmrZMtys5asIDwTTZKXbknHEG/6XOxS8IzdVk3mkVKJXvI2w3DuKWSvbfCcdHW8bQqg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="Brs/1/m6"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEBCA606B405; Mon, 9 Nov 2026 07:34:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Brs/1/m6 Received: by smtp.kernel.org (Postfix) with ESMTPSA id C34BA1F008A2; Mon, 9 Nov 2026 07:34:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794209689; bh=Mz8AXu/UZmuCcqZREPjQc9nW4LF1v2AIqPDriU8p2gM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Brs/1/m6NdBI9NBGZ6bvDBC1p/1LQ6Wr/mJVT2LlMj/tEtmEQO57PvprcowFnJT0Y Itea69hZnB5riJSfxpDQGqyZ2ny5p3ayaFW/xhtpw+mA5uHepseIGv3eJFq4BGmKju YBGtBlDevC4sYQ0+e2ru2JmyCjiPrthzo2URgipJJfXv8rFizZ3kZKc/ixqTBOWjgw jRWkiWecnUy+dSH5dfcWIgVZtafBZr86FBua7Bjm2J94wO9EQ7iqNtg0NqlGV2IDAt 0oPhdB/VHlyDYrOZ5IqUKzkxb9HJQGAGnEmnpYE3JEgu7aqRDfhay2UvymyBoxNjpZ XSHF9tgYkYvCw== From: Leon Romanovsky To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Dmitry Torokhov , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Johannes Berg , Jonathan Corbet , Shuah Khan , Randy Dunlap , Bjorn Helgaas , "Joerg Roedel (AMD)" , Suravee Suthikulpanit , Vasant Hegde , Will Deacon , Robin Murphy , David Woodhouse , Lu Baolu , Johan Hovold , Eric Dumazet , Marcel Holtmann , Luiz Augusto von Dentz , Nipun Gupta , Nikhil Agarwal , Pieter Jansen van Vuuren Cc: linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, linux-input@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-usb@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux.dev, Jason Gunthorpe Subject: [PATCH v2 15/19] driver core: Expose committed device trust level Date: Mon, 9 Nov 2026 09:33:45 +0200 Message-ID: <20261109-device-trust-core-v2-15-3b12d9a9f861@nvidia.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261109-device-trust-core-v2-0-3b12d9a9f861@nvidia.com> References: <20261109-device-trust-core-v2-0-3b12d9a9f861@nvidia.com> X-Mailing-List: linux-kernel@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" X-Mailer: b4 0.15-dev-18f8f Content-Transfer-Encoding: 8bit From: Leon Romanovsky IOMMU state can outlive a functional driver, including after failed setup and unbind. The active trust level becomes disabled in those states, so infrastructure needs access to the retained authorization. Export device_get_committed_trust_level() to expose the existing lifetime commitment independently of the active binding. Signed-off-by: Leon Romanovsky --- drivers/base/trust.c | 13 +++++++++++++ include/linux/device/trust.h | 1 + 2 files changed, 14 insertions(+) diff --git a/drivers/base/trust.c b/drivers/base/trust.c index 2bec6825ef31e..f79762e201178 100644 --- a/drivers/base/trust.c +++ b/drivers/base/trust.c @@ -93,6 +93,19 @@ enum device_trust_level device_get_trust_level(const struct device *dev) } EXPORT_SYMBOL_GPL(device_get_trust_level); +/** + * device_get_committed_trust_level - Return the lifetime trust commitment + * @dev: device to inspect + * + * Return: %DEVICE_TRUST_DISABLED before admission, otherwise the level fixed + * before driver setup. The commitment survives setup failure and unbind. + */ +enum device_trust_level device_get_committed_trust_level(const struct device *dev) +{ + return READ_ONCE(dev->trust_committed_level); +} +EXPORT_SYMBOL_GPL(device_get_committed_trust_level); + /** * device_is_adversarial - Test whether a device is operated as an adversary * @dev: device to inspect diff --git a/include/linux/device/trust.h b/include/linux/device/trust.h index 9d6d387d01203..decf5aaf2d46d 100644 --- a/include/linux/device/trust.h +++ b/include/linux/device/trust.h @@ -41,6 +41,7 @@ enum device_trust_policy { void device_trust_init(struct device *dev); int device_trust_set_policy(struct device *dev, enum device_trust_policy policy); enum device_trust_level device_get_trust_level(const struct device *dev); +enum device_trust_level device_get_committed_trust_level(const struct device *dev); bool device_is_adversarial(const struct device *dev); #endif /* _DEVICE_TRUST_H_ */ -- 2.56.0