From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78370266EFC for ; Thu, 11 Sep 2025 23:56:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757635013; cv=none; b=iqGm5HbHFRnb02u3ExxGb/xKBNwm6b2pzOW56LYfUaBJ1mHE+yIQuDFU1ae0BCQbqTRNg0AwouQuPRz8o5PiFMCqjI32D0g+FdfGa+eNzk+XgpJRZkBpPh2I3IjXSqytnT0BJL3CzD/P2kXTRfLSyirwiFXDpaOe+sO4i0dNJG4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757635013; c=relaxed/simple; bh=N/cFrk4c2sRma612iaMy42U0yqKHMn9Cti9Q6QoH0Nk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oi4U5noNnvxUCOKwKgvY0m5/oWlwp0LzkEsA8ROTOTme/K01VySMS2UK8FHGPzuGwEgQ5/f85hh+dHTlShviP1Jd/tIqBJQLugNWyU9bBnpnSEJvzZZY2Kha+VdMrE/wPDDB9oZxO0QUNWa0oluI6WpsNT1RqS/22oFYZZs9O0Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Yace2q5j; arc=none smtp.client-ip=192.198.163.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Yace2q5j" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1757635011; x=1789171011; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=N/cFrk4c2sRma612iaMy42U0yqKHMn9Cti9Q6QoH0Nk=; b=Yace2q5jv2gAA5vkuVhBmTe0TF9RnkLK9pCAV35eJHPp2xi/BQjI1ctp YFX7Yfg9foSumzvAY9iKLIu00vR7+HsMOqC19TxpWUCyTwbUYJsxZ58Uc FYTCaLredvudpGcM4M/gLwd2Ag7jpuXzeKEojxOrwUbWSx63EBgfpViD0 wcvPrgNBfPFI+IVRiHOxBNYU4ABrFU/5E1gzYS0Pvwo0IgSdy3o7lJSBl oux5Ut50vYyZw80iYiSi0NkjTwK1HODf5gTzbGMeFB5FJ82XiTOwKT1Nk YwDTngHyIOihTjQvh5leQUwbSq+md3DYtCP9hXOJbUnN8rF5yoP+6MPu6 A==; X-CSE-ConnectionGUID: U5WkLkCzTwiuFfoWY8x4lg== X-CSE-MsgGUID: ad2Oqea4T1GsdkguRJdmMg== X-IronPort-AV: E=McAfee;i="6800,10657,11550"; a="70598702" X-IronPort-AV: E=Sophos;i="6.18,258,1751266800"; d="scan'208";a="70598702" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2025 16:56:48 -0700 X-CSE-ConnectionGUID: QnFkePEHTza1i3ossQJWsw== X-CSE-MsgGUID: IkQaw24IQImEMBk6ppFSYg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,258,1751266800"; d="scan'208";a="173393514" Received: from dwillia2-desk.jf.intel.com ([10.88.27.145]) by fmviesa007.fm.intel.com with ESMTP; 11 Sep 2025 16:56:47 -0700 From: Dan Williams To: linux-pci@vger.kernel.org, linux-coco@lists.linux.dev Cc: gregkh@linuxfoundation.org, bhelgaas@google.com, lukas@wunner.de, Alexey Kardashevskiy , Xu Yilun , Jonathan Cameron , "Aneesh Kumar K.V (Arm)" Subject: [PATCH resend v6 01/10] coco/tsm: Introduce a core device for TEE Security Managers Date: Thu, 11 Sep 2025 16:56:38 -0700 Message-ID: <20250911235647.3248419-2-dan.j.williams@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250911235647.3248419-1-dan.j.williams@intel.com> References: <20250911235647.3248419-1-dan.j.williams@intel.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit A "TSM" is a platform component that provides an API for securely provisioning resources for a confidential guest (TVM) to consume. The name originates from the PCI specification for platform agent that carries out operations for PCIe TDISP (TEE Device Interface Security Protocol). Instances of this core device are parented by a device representing the platform security function like CONFIG_CRYPTO_DEV_CCP or CONFIG_INTEL_TDX_HOST. This device interface is a frontend to the aspects of a TSM and TEE I/O that are cross-architecture common. This includes mechanisms like enumerating available platform TEE I/O capabilities and provisioning connections between the platform TSM and device DSMs (Device Security Manager (TDISP)). For now this is just the scaffolding for registering a TSM device sysfs interface. Cc: Alexey Kardashevskiy Cc: Xu Yilun Reviewed-by: Jonathan Cameron Co-developed-by: Aneesh Kumar K.V (Arm) Signed-off-by: Aneesh Kumar K.V (Arm) Acked-by: Bjorn Helgaas Signed-off-by: Dan Williams --- Documentation/ABI/testing/sysfs-class-tsm | 9 ++ MAINTAINERS | 2 +- drivers/virt/coco/Kconfig | 3 + drivers/virt/coco/Makefile | 1 + drivers/virt/coco/tsm-core.c | 109 ++++++++++++++++++++++ include/linux/tsm.h | 4 + 6 files changed, 127 insertions(+), 1 deletion(-) create mode 100644 Documentation/ABI/testing/sysfs-class-tsm create mode 100644 drivers/virt/coco/tsm-core.c diff --git a/Documentation/ABI/testing/sysfs-class-tsm b/Documentation/ABI/testing/sysfs-class-tsm new file mode 100644 index 000000000000..2949468deaf7 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-tsm @@ -0,0 +1,9 @@ +What: /sys/class/tsm/tsmN +Contact: linux-coco@lists.linux.dev +Description: + "tsmN" is a device that represents the generic attributes of a + platform TEE Security Manager. It is typically a child of a + platform enumerated TSM device. /sys/class/tsm/tsmN/uevent + signals when the PCI layer is able to support establishment of + link encryption and other device-security features coordinated + through a platform tsm. diff --git a/MAINTAINERS b/MAINTAINERS index b65289db4822..024b18244c65 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25613,7 +25613,7 @@ S: Maintained F: Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml F: Documentation/devicetree/bindings/trigger-source/pwm-trigger.yaml -TRUSTED SECURITY MODULE (TSM) INFRASTRUCTURE +TRUSTED EXECUTION ENVIRONMENT SECURITY MANAGER (TSM) M: Dan Williams L: linux-coco@lists.linux.dev S: Maintained diff --git a/drivers/virt/coco/Kconfig b/drivers/virt/coco/Kconfig index 819a97e8ba99..bb0c6d6ddcc8 100644 --- a/drivers/virt/coco/Kconfig +++ b/drivers/virt/coco/Kconfig @@ -14,3 +14,6 @@ source "drivers/virt/coco/tdx-guest/Kconfig" source "drivers/virt/coco/arm-cca-guest/Kconfig" source "drivers/virt/coco/guest/Kconfig" + +config TSM + bool diff --git a/drivers/virt/coco/Makefile b/drivers/virt/coco/Makefile index f918bbb61737..cb52021912b3 100644 --- a/drivers/virt/coco/Makefile +++ b/drivers/virt/coco/Makefile @@ -7,4 +7,5 @@ obj-$(CONFIG_ARM_PKVM_GUEST) += pkvm-guest/ obj-$(CONFIG_SEV_GUEST) += sev-guest/ obj-$(CONFIG_INTEL_TDX_GUEST) += tdx-guest/ obj-$(CONFIG_ARM_CCA_GUEST) += arm-cca-guest/ +obj-$(CONFIG_TSM) += tsm-core.o obj-$(CONFIG_TSM_GUEST) += guest/ diff --git a/drivers/virt/coco/tsm-core.c b/drivers/virt/coco/tsm-core.c new file mode 100644 index 000000000000..a64b776642cf --- /dev/null +++ b/drivers/virt/coco/tsm-core.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright(c) 2024 Intel Corporation. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include + +static struct class *tsm_class; +static DECLARE_RWSEM(tsm_rwsem); +static DEFINE_IDR(tsm_idr); + +struct tsm_dev { + struct device dev; + int id; +}; + +static struct tsm_dev *alloc_tsm_dev(struct device *parent) +{ + struct tsm_dev *tsm_dev __free(kfree) = + kzalloc(sizeof(*tsm_dev), GFP_KERNEL); + struct device *dev; + int id; + + if (!tsm_dev) + return ERR_PTR(-ENOMEM); + + guard(rwsem_write)(&tsm_rwsem); + id = idr_alloc(&tsm_idr, tsm_dev, 0, INT_MAX, GFP_KERNEL); + if (id < 0) + return ERR_PTR(id); + + tsm_dev->id = id; + dev = &tsm_dev->dev; + dev->parent = parent; + dev->class = tsm_class; + device_initialize(dev); + return no_free_ptr(tsm_dev); +} + +static void put_tsm_dev(struct tsm_dev *tsm_dev) +{ + if (!IS_ERR_OR_NULL(tsm_dev)) + put_device(&tsm_dev->dev); +} + +DEFINE_FREE(put_tsm_dev, struct tsm_dev *, + if (!IS_ERR_OR_NULL(_T)) put_tsm_dev(_T)) + +struct tsm_dev *tsm_register(struct device *parent) +{ + struct tsm_dev *tsm_dev __free(put_tsm_dev) = alloc_tsm_dev(parent); + struct device *dev; + int rc; + + if (IS_ERR(tsm_dev)) + return tsm_dev; + + dev = &tsm_dev->dev; + rc = dev_set_name(dev, "tsm%d", tsm_dev->id); + if (rc) + return ERR_PTR(rc); + + rc = device_add(dev); + if (rc) + return ERR_PTR(rc); + + return no_free_ptr(tsm_dev); +} +EXPORT_SYMBOL_GPL(tsm_register); + +void tsm_unregister(struct tsm_dev *tsm_dev) +{ + device_unregister(&tsm_dev->dev); +} +EXPORT_SYMBOL_GPL(tsm_unregister); + +static void tsm_release(struct device *dev) +{ + struct tsm_dev *tsm_dev = container_of(dev, typeof(*tsm_dev), dev); + + guard(rwsem_write)(&tsm_rwsem); + idr_remove(&tsm_idr, tsm_dev->id); + kfree(tsm_dev); +} + +static int __init tsm_init(void) +{ + tsm_class = class_create("tsm"); + if (IS_ERR(tsm_class)) + return PTR_ERR(tsm_class); + + tsm_class->dev_release = tsm_release; + return 0; +} +module_init(tsm_init) + +static void __exit tsm_exit(void) +{ + class_destroy(tsm_class); +} +module_exit(tsm_exit) + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("TEE Security Manager Class Device"); diff --git a/include/linux/tsm.h b/include/linux/tsm.h index 431054810dca..aa906eb67360 100644 --- a/include/linux/tsm.h +++ b/include/linux/tsm.h @@ -5,6 +5,7 @@ #include #include #include +#include #define TSM_REPORT_INBLOB_MAX 64 #define TSM_REPORT_OUTBLOB_MAX SZ_32K @@ -109,4 +110,7 @@ struct tsm_report_ops { int tsm_report_register(const struct tsm_report_ops *ops, void *priv); int tsm_report_unregister(const struct tsm_report_ops *ops); +struct tsm_dev; +struct tsm_dev *tsm_register(struct device *parent); +void tsm_unregister(struct tsm_dev *tsm_dev); #endif /* __TSM_H */ base-commit: 650d64cdd69122cc60d309f2f5fd72bbc080dbd7 -- 2.51.0