From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 5AEFA32862D for ; Fri, 31 Oct 2025 21:29:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761946148; cv=none; b=hzAtgKsWA0RZjt1evCDpbqBfptKQHDKK75qj5yMyGFCfyW/iebuoLjIz3/ApI7+M0WtwhyvfIuxRVG7x+1HYSPDyjOYzmDE3968BbC6URdwDhmy0DbIsWyFYN4yPgZCj8G2YPVk2CpC3evu3jUKgj76UX+90rjZbNfbXpytqJFo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761946148; c=relaxed/simple; bh=Nc00ECAe8pJbmq3QiX29toPeFHSCsQmdKoNKoHS6hSQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=C0MqXXtNdSFHEygPGqWOC0fbyspxmEkpw5pGkaqZuCnkVvOY85LhvEiWl+Fb0uy4WlMPUcgAv0MQVI257L5COWvmT+epqXXejqEEsbVU24uA7BCCLJU1hnIyeUohlj0tHVVn1coZGOosNkrKKejUIIr79ThX7xls0oydJ6oNuV8= 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=k1snCofF; arc=none smtp.client-ip=198.175.65.17 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="k1snCofF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1761946145; x=1793482145; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Nc00ECAe8pJbmq3QiX29toPeFHSCsQmdKoNKoHS6hSQ=; b=k1snCofFhtf4ZGMiDhTdeVJ45Dc1mnb3rvKb1dPmxjUQTHbpBk6arAhe /MlCacL6UC/2x0CrojdE3siVqyc2fyENsRovtxZQ1bRiOa5LgBcd1Tb9/ q45VOAxZTSFN+e57lTeW4MSpB2qPhzvx3YqN7zvOmcs4V2d2YTBY9twiC 3NWN5Vkd9Nik6rUlSxbP2aFKWin/QlWH6gq+JW47Tkb7KLIg+3TYPsqeO wrZRJ6v7pkTTE5FhwZjqP5gZzt21KOCN0O+zZOwI7KEjidevOeKKyfou6 rELJQpVPWpYQkrh2FVrpD3H8D/SUuWDaGtgUEwNlixM+KCFlES57MWZek w==; X-CSE-ConnectionGUID: 5olzCLzWTXqT6AgeyL7fFA== X-CSE-MsgGUID: mBvw3AgKTc++nyr6jBzS+w== X-IronPort-AV: E=McAfee;i="6800,10657,11531"; a="64043627" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="64043627" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Oct 2025 14:28:59 -0700 X-CSE-ConnectionGUID: LvrUEoeaTYyVcFB0j7N7jA== X-CSE-MsgGUID: Y3OEjkqSSkGK4Vhio1mE5w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,270,1754982000"; d="scan'208";a="216986680" Received: from dwillia2-desk.jf.intel.com ([10.88.27.145]) by orviesa002.jf.intel.com with ESMTP; 31 Oct 2025 14:29:00 -0700 From: Dan Williams To: linux-pci@vger.kernel.org Cc: linux-coco@lists.linux.dev, gregkh@linuxfoundation.org, aik@amd.com, aneesh.kumar@kernel.org, yilun.xu@linux.intel.com, Bjorn Helgaas , Jonathan Cameron Subject: [PATCH v8 9/9] PCI/TSM: Report active IDE streams Date: Fri, 31 Oct 2025 14:29:01 -0700 Message-ID: <20251031212902.2256310-10-dan.j.williams@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251031212902.2256310-1-dan.j.williams@intel.com> References: <20251031212902.2256310-1-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 Given that the platform TSM owns IDE Stream ID allocation, report the active streams via the TSM class device. Establish a symlink from the class device to the PCI endpoint device consuming the stream, named by the Stream ID. Acked-by: Bjorn Helgaas Reviewed-by: Jonathan Cameron Reviewed-by: Alexey Kardashevskiy Signed-off-by: Dan Williams --- Documentation/ABI/testing/sysfs-class-tsm | 10 ++++++++ include/linux/pci-ide.h | 2 ++ include/linux/tsm.h | 3 +++ drivers/pci/ide.c | 4 ++++ drivers/virt/coco/tsm-core.c | 28 +++++++++++++++++++++++ 5 files changed, 47 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-tsm b/Documentation/ABI/testing/sysfs-class-tsm index 2949468deaf7..6fc1a5ac6da1 100644 --- a/Documentation/ABI/testing/sysfs-class-tsm +++ b/Documentation/ABI/testing/sysfs-class-tsm @@ -7,3 +7,13 @@ Description: signals when the PCI layer is able to support establishment of link encryption and other device-security features coordinated through a platform tsm. + +What: /sys/class/tsm/tsmN/streamH.R.E +Contact: linux-pci@vger.kernel.org +Description: + (RO) When a host bridge has established a secure connection via + the platform TSM, symlink appears. The primary function of this + is have a system global review of TSM resource consumption + across host bridges. The link points to the endpoint PCI device + and matches the same link published by the host bridge. See + Documentation/ABI/testing/sysfs-devices-pci-host-bridge. diff --git a/include/linux/pci-ide.h b/include/linux/pci-ide.h index 85645b0a8620..d0f10f3c89fc 100644 --- a/include/linux/pci-ide.h +++ b/include/linux/pci-ide.h @@ -50,6 +50,7 @@ struct pci_ide_partner { * @host_bridge_stream: allocated from host bridge @ide_stream_ida pool * @stream_id: unique Stream ID (within Partner Port pairing) * @name: name of the established Selective IDE Stream in sysfs + * @tsm_dev: For TSM established IDE, the TSM device context * * Negative @stream_id values indicate "uninitialized" on the * expectation that with TSM established IDE the TSM owns the stream_id @@ -61,6 +62,7 @@ struct pci_ide { u8 host_bridge_stream; int stream_id; const char *name; + struct tsm_dev *tsm_dev; }; void pci_ide_set_nr_streams(struct pci_host_bridge *hb, u16 nr); diff --git a/include/linux/tsm.h b/include/linux/tsm.h index 22e05b2aac69..a3b7ab668eff 100644 --- a/include/linux/tsm.h +++ b/include/linux/tsm.h @@ -123,4 +123,7 @@ int tsm_report_unregister(const struct tsm_report_ops *ops); struct tsm_dev *tsm_register(struct device *parent, struct pci_tsm_ops *ops); void tsm_unregister(struct tsm_dev *tsm_dev); struct tsm_dev *find_tsm_dev(int id); +struct pci_ide; +int tsm_ide_stream_register(struct pci_ide *ide); +void tsm_ide_stream_unregister(struct pci_ide *ide); #endif /* __TSM_H */ diff --git a/drivers/pci/ide.c b/drivers/pci/ide.c index 4ae3872589fc..da5b1acccbb4 100644 --- a/drivers/pci/ide.c +++ b/drivers/pci/ide.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "pci.h" @@ -261,6 +262,9 @@ void pci_ide_stream_release(struct pci_ide *ide) if (ide->partner[PCI_IDE_EP].enable) pci_ide_stream_disable(pdev, ide); + if (ide->tsm_dev) + tsm_ide_stream_unregister(ide); + if (ide->partner[PCI_IDE_RP].setup) pci_ide_stream_teardown(rp, ide); diff --git a/drivers/virt/coco/tsm-core.c b/drivers/virt/coco/tsm-core.c index 0e705f3067a1..f027876a2f19 100644 --- a/drivers/virt/coco/tsm-core.c +++ b/drivers/virt/coco/tsm-core.c @@ -4,11 +4,13 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include #include #include +#include static struct class *tsm_class; static DECLARE_RWSEM(tsm_rwsem); @@ -106,6 +108,32 @@ void tsm_unregister(struct tsm_dev *tsm_dev) } EXPORT_SYMBOL_GPL(tsm_unregister); +/* must be invoked between tsm_register / tsm_unregister */ +int tsm_ide_stream_register(struct pci_ide *ide) +{ + struct pci_dev *pdev = ide->pdev; + struct pci_tsm *tsm = pdev->tsm; + struct tsm_dev *tsm_dev = tsm->tsm_dev; + int rc; + + rc = sysfs_create_link(&tsm_dev->dev.kobj, &pdev->dev.kobj, ide->name); + if (rc) + return rc; + + ide->tsm_dev = tsm_dev; + return 0; +} +EXPORT_SYMBOL_GPL(tsm_ide_stream_register); + +void tsm_ide_stream_unregister(struct pci_ide *ide) +{ + struct tsm_dev *tsm_dev = ide->tsm_dev; + + ide->tsm_dev = NULL; + sysfs_remove_link(&tsm_dev->dev.kobj, ide->name); +} +EXPORT_SYMBOL_GPL(tsm_ide_stream_unregister); + static void tsm_release(struct device *dev) { struct tsm_dev *tsm_dev = container_of(dev, typeof(*tsm_dev), dev); -- 2.51.0