From patchwork Mon Jan 24 00:31:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12721285 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5850C433FE for ; Mon, 24 Jan 2022 00:31:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235522AbiAXAbZ (ORCPT ); Sun, 23 Jan 2022 19:31:25 -0500 Received: from mga03.intel.com ([134.134.136.65]:62345 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231830AbiAXAbY (ORCPT ); Sun, 23 Jan 2022 19:31:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1642984284; x=1674520284; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2DqZACrxPiU5SVR8TgyzgrmTDRlGpisXtfWG0ZvZ/rc=; b=iJMBpveRdKEMHYu0QA7XzMFpTN1wH7kb+Tvw7MOWoZWQxDwl3l90zzAt ssAHUyTj3yLcktdfJGToOLspT7y+1ImfF8YYill9CX7DlPA/j79Im9dFv +kRamAVcG5vjhRnNH8zQo27LhYSREo+DRy+pAHnmK81PedJ4feohc1DXz ffyoW/V0Zhj23lWf7XwhGweJGFkAdsnCmV0nyr7DjdpM2isFDsnP1BezJ DsABO1NpT6CCjHQZ612u8K+E0/DKnaY+aPXsSmmIBojUTwm0wMOLP0amO aJ8JV7hHwRQknqH08e75abtA1MV819clY/bAZGF5sxN5iGRp2U+rGGv8C A==; X-IronPort-AV: E=McAfee;i="6200,9189,10236"; a="245879424" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="245879424" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jan 2022 16:31:24 -0800 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="494436553" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jan 2022 16:31:24 -0800 Subject: [PATCH v3 31/40] cxl/memdev: Add numa_node attribute From: Dan Williams To: linux-cxl@vger.kernel.org Cc: linux-pci@vger.kernel.org, nvdimm@lists.linux.dev Date: Sun, 23 Jan 2022 16:31:24 -0800 Message-ID: <164298428430.3018233.16409089892707993289.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <164298411792.3018233.7493009997525360044.stgit@dwillia2-desk3.amr.corp.intel.com> References: <164298411792.3018233.7493009997525360044.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-3-g996c MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org While CXL memory targets will have their own memory target node, individual memory devices may be affinitized like other PCI devices. Emit that attribute for memdevs. Signed-off-by: Dan Williams Reviewed-by: Jonathan Cameron --- Documentation/ABI/testing/sysfs-bus-cxl | 9 +++++++++ drivers/cxl/core/memdev.c | 17 +++++++++++++++++ tools/testing/cxl/test/cxl.c | 1 + 3 files changed, 27 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 87c0e5e65322..0b51cfec0c66 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -34,6 +34,15 @@ Description: capability. Mandatory for CXL devices, see CXL 2.0 8.1.12.2 Memory Device PCIe Capabilities and Extended Capabilities. +What: /sys/bus/cxl/devices/memX/numa_node +Date: January, 2022 +KernelVersion: v5.18 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) If NUMA is enabled and the platform has affinitized the + host PCI device for this memory device, emit the CPU node + affinity for this device. + What: /sys/bus/cxl/devices/*/devtype Date: June, 2021 KernelVersion: v5.14 diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c index 1e574b052583..b2773664e407 100644 --- a/drivers/cxl/core/memdev.c +++ b/drivers/cxl/core/memdev.c @@ -99,11 +99,19 @@ static ssize_t serial_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(serial); +static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", dev_to_node(dev)); +} +static DEVICE_ATTR_RO(numa_node); + static struct attribute *cxl_memdev_attributes[] = { &dev_attr_serial.attr, &dev_attr_firmware_version.attr, &dev_attr_payload_max.attr, &dev_attr_label_storage_size.attr, + &dev_attr_numa_node.attr, NULL, }; @@ -117,8 +125,17 @@ static struct attribute *cxl_memdev_ram_attributes[] = { NULL, }; +static umode_t cxl_memdev_visible(struct kobject *kobj, struct attribute *a, + int n) +{ + if (!IS_ENABLED(CONFIG_NUMA) && a == &dev_attr_numa_node.attr) + return 0; + return a->mode; +} + static struct attribute_group cxl_memdev_attribute_group = { .attrs = cxl_memdev_attributes, + .is_visible = cxl_memdev_visible, }; static struct attribute_group cxl_memdev_ram_attribute_group = { diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c index 40ed567952e6..cd2f20f2707f 100644 --- a/tools/testing/cxl/test/cxl.c +++ b/tools/testing/cxl/test/cxl.c @@ -583,6 +583,7 @@ static __init int cxl_test_init(void) if (!pdev) goto err_mem; pdev->dev.parent = &port->dev; + set_dev_node(&pdev->dev, i % 2); rc = platform_device_add(pdev); if (rc) {