From patchwork Tue Aug 18 17:04:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247903 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3284551ect; Tue, 18 Aug 2020 10:05:38 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzfouvzUC6qdn9I4Pv5fYMBcSbs67cAbkblqm3x3Z+jHGjlQQhNAqAd+UQOKM/tZ5wqL+3Q X-Received: by 2002:a05:6402:1d93:: with SMTP id dk19mr20587331edb.382.1597770338160; Tue, 18 Aug 2020 10:05:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770338; cv=none; d=google.com; s=arc-20160816; b=Alr79ZfGe6BO99MJ56KXuRqm3UaHMZd4VF0XRMcqFGSMvU/xShe6FgW17xnJDkLDr+ bwejAQYB3GdBOzEE0bp3dmzGrzT5hQJcDjW4oP5lffYZ40AQbGWCH0OrhayEuNms6hx9 tFPngNZ1kbng76DyI6hAArkcgaP7pvSAHLh9JDRPrV3vuP9w6+L28BJQLeBUB2xboz1M dy1KY55OH5fikBTUpeb7xZck8mxbGQAGJBvWq2yXUfQZGvsNETSpXUgp7SylviHenPaf dIdvzWvOusevU1/vtqRHREgPJe2Skm38/ExjcfkQ0ecJpsyTdhZso7VXdinygvQMKXLY hRTQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=IH0AK1BFTD8kOefMqxOfhgJmlSb4MyGebuuGU85w/Zo=; b=IqXJ+8bxtN7FCi0ZLcnWHUDAic9TkDsMW3e+m1x5UpABPMSJgQUBEut5R6oNZFAIuc QwKqmzMjw4OslilQScxDSidLhTZOCD4g5c++AHD7cSSvYnsxXyHldbyZxR6nnSDb/ffi 8xKaCTfd8/mpuBDn/YfS97T5a3ExXq6TQGD0yHTynnUPp/pIVYn7DjyiGPA5hdYJzUOE ZoNeYFNeiDZCOClCUG1XMjI+RpPbIWeiuQJas1ogLGqIW2d4ZCLKVUesHh7W/3rU4PUG clvhZzwQQwxQ50ckdtcfWazoUhBNxx+ptXv84Pw+ZGA/nNT0u7zSQGirrrp6rPuK+6NB Howg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w22si14486473ejk.590.2020.08.18.10.05.37; Tue, 18 Aug 2020 10:05:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728335AbgHRRFe (ORCPT + 7 others); Tue, 18 Aug 2020 13:05:34 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2655 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727106AbgHRRFI (ORCPT ); Tue, 18 Aug 2020 13:05:08 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id AE21EAED85E53B89686C; Tue, 18 Aug 2020 18:05:06 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:05:06 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 1/6] ACPI: Support Generic Initiator only domains Date: Wed, 19 Aug 2020 01:04:12 +0800 Message-ID: <20200818170417.1515975-2-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Generic Initiators are a new ACPI concept that allows for the description of proximity domains that contain a device which performs memory access (such as a network card) but neither host CPU nor Memory. This patch has the parsing code and provides the infrastructure for an architecture to associate these new domains with their nearest memory processing node. Signed-off-by: Jonathan Cameron --- drivers/acpi/numa/srat.c | 60 +++++++++++++++++++++++++++++++++++++++- drivers/base/node.c | 3 ++ include/linux/nodemask.h | 1 + 3 files changed, 63 insertions(+), 1 deletion(-) -- 2.19.1 Reported-by: kernel test robot diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c index 15bbaab8500b..d44bcda41202 100644 --- a/drivers/acpi/numa/srat.c +++ b/drivers/acpi/numa/srat.c @@ -130,6 +130,36 @@ acpi_table_print_srat_entry(struct acpi_subtable_header *header) } break; + case ACPI_SRAT_TYPE_GENERIC_AFFINITY: + { + struct acpi_srat_generic_affinity *p = + (struct acpi_srat_generic_affinity *)header; + + if (p->device_handle_type == 0) { + /* + * For pci devices this may be the only place they + * are assigned a proximity domain + */ + pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n", + *(u16 *)(&p->device_handle[0]), + *(u16 *)(&p->device_handle[2]), + p->proximity_domain, + (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ? + "enabled" : "disabled"); + } else { + /* + * In this case we can rely on the device having a + * proximity domain reference + */ + pr_debug("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n", + (char *)(&p->device_handle[0]), + (char *)(&p->device_handle[8]), + p->proximity_domain, + (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ? + "enabled" : "disabled"); + } + } + break; default: pr_warn("Found unsupported SRAT entry (type = 0x%x)\n", header->type); @@ -332,6 +362,32 @@ acpi_parse_gicc_affinity(union acpi_subtable_headers *header, return 0; } +static int __init +acpi_parse_gi_affinity(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_srat_generic_affinity *gi_affinity; + int node; + + gi_affinity = (struct acpi_srat_generic_affinity *)header; + if (!gi_affinity) + return -EINVAL; + acpi_table_print_srat_entry(&header->common); + + if (!(gi_affinity->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED)) + return -EINVAL; + + node = acpi_map_pxm_to_node(gi_affinity->proximity_domain); + if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { + pr_err("SRAT: Too many proximity domains.\n"); + return -EINVAL; + } + node_set(node, numa_nodes_parsed); + node_set_state(node, N_GENERIC_INITIATOR); + + return 0; +} + static int __initdata parsed_numa_memblks; static int __init @@ -385,7 +441,7 @@ int __init acpi_numa_init(void) /* SRAT: System Resource Affinity Table */ if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { - struct acpi_subtable_proc srat_proc[3]; + struct acpi_subtable_proc srat_proc[4]; memset(srat_proc, 0, sizeof(srat_proc)); srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY; @@ -394,6 +450,8 @@ int __init acpi_numa_init(void) srat_proc[1].handler = acpi_parse_x2apic_affinity; srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY; srat_proc[2].handler = acpi_parse_gicc_affinity; + srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY; + srat_proc[3].handler = acpi_parse_gi_affinity; acpi_table_parse_entries_array(ACPI_SIG_SRAT, sizeof(struct acpi_table_srat), diff --git a/drivers/base/node.c b/drivers/base/node.c index 508b80f6329b..53383f1f683c 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -980,6 +980,8 @@ static struct node_attr node_state_attr[] = { #endif [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), + [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator, + N_GENERIC_INITIATOR), }; static struct attribute *node_state_attrs[] = { @@ -991,6 +993,7 @@ static struct attribute *node_state_attrs[] = { #endif &node_state_attr[N_MEMORY].attr.attr, &node_state_attr[N_CPU].attr.attr, + &node_state_attr[N_GENERIC_INITIATOR].attr.attr, NULL }; diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index 27e7fa36f707..3334ce056335 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -399,6 +399,7 @@ enum node_states { #endif N_MEMORY, /* The node has memory(regular, high, movable) */ N_CPU, /* The node has one or more cpus */ + N_GENERIC_INITIATOR, /* The node has one or more Generic Initiators */ NR_NODE_STATES }; From patchwork Tue Aug 18 17:04:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247904 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3284856ect; Tue, 18 Aug 2020 10:06:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxh/lVRyrPFrCNY7L/QrUIV1ol6Xwje8/qQWrJy79KFxjhDIdqSOhtMMniZTAIQhKfp2Ky2 X-Received: by 2002:a50:e70e:: with SMTP id a14mr20177650edn.93.1597770361132; Tue, 18 Aug 2020 10:06:01 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770361; cv=none; d=google.com; s=arc-20160816; b=qo8W7ydiQd9VocviF7q89LWl/And58bnVPPiV82VuliwON1sWzbSzxz1+zVjpOmq9L emPlXxv+TBBQBWYI4e7WnmOlTMmhcj+NhHA8KxJPcELppSN439fpLUThJItbHbffH7zk 5xLXmo4hAUlbwT8IK4ag1tH5C2nUWdX4GminKmzdspUNTKgVvdfqQ875PCTo5drKxXo5 jhd+xfoPwE+RBfR5uE/UpjN88DoJk5CQIvaajggPRh3ftwnW5Q5NrQyusgBuGyutqQky Hdj1JEMrH7OizKrw3m0TE7wzW15KQfg1bkhv+SNzhVUUq0GVlIYbIGi3wDPkDLqGZWtr 0IAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=zQvcCDTuChWqKdR57McVWcECXFBhExGQLCMNAFrLOv0=; b=P1yreSWmLJ7YUzj4/3eVijc1yhoQ9l+ZrQZWzbHTP7fLlzLjUUr+PBsXn50TqTvJSU NK7HMnXI3rRyxlZ5IiBk+MiidabPJGdq/4wryExlewxIOqCvhoMIUS/MZULIvpZFwSon +QiGBkoyyOnPzEXBKsBt9y4/7vSvgOlnk0Plsb/7kEsB1pLXLxx0cHqKdOzA7esKn+P1 bxVJJEFa5VmIBfdBla2H6CAU24B2SaPBUgOpPneMo9Z1TAQDkeOJWaaFOD67w7cg4spO fe+ZH/cGC2/XcfXBrOhIPrx40cVktvZ5CwOcl7z74KZ4Nlc4tIqqO29JjRGmtTxmMwzL 4t/g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id f13si13730001ejq.631.2020.08.18.10.06.00; Tue, 18 Aug 2020 10:06:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728440AbgHRRFx (ORCPT + 7 others); Tue, 18 Aug 2020 13:05:53 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2656 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728417AbgHRRFi (ORCPT ); Tue, 18 Aug 2020 13:05:38 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 5B581144BE759295DF3A; Tue, 18 Aug 2020 18:05:37 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:05:36 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 2/6] x86: Support Generic Initiator only proximity domains Date: Wed, 19 Aug 2020 01:04:13 +0800 Message-ID: <20200818170417.1515975-3-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org In common with memoryless domains we only register GI domains if the proximity node is not online. If a domain is already a memory containing domain, or a memoryless domain there is nothing to do just because it also contains a Generic Initiator. Signed-off-by: Jonathan Cameron --- arch/x86/include/asm/numa.h | 2 ++ arch/x86/kernel/setup.c | 1 + arch/x86/mm/numa.c | 14 ++++++++++++++ 3 files changed, 17 insertions(+) -- 2.19.1 diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h index bbfde3d2662f..f631467272a3 100644 --- a/arch/x86/include/asm/numa.h +++ b/arch/x86/include/asm/numa.h @@ -62,12 +62,14 @@ extern void numa_clear_node(int cpu); extern void __init init_cpu_to_node(void); extern void numa_add_cpu(int cpu); extern void numa_remove_cpu(int cpu); +extern void init_gi_nodes(void); #else /* CONFIG_NUMA */ static inline void numa_set_node(int cpu, int node) { } static inline void numa_clear_node(int cpu) { } static inline void init_cpu_to_node(void) { } static inline void numa_add_cpu(int cpu) { } static inline void numa_remove_cpu(int cpu) { } +static inline void init_gi_nodes(void) { } #endif /* CONFIG_NUMA */ #ifdef CONFIG_DEBUG_PER_CPU_MAPS diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 3511736fbc74..9062c146f03a 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1218,6 +1218,7 @@ void __init setup_arch(char **cmdline_p) prefill_possible_map(); init_cpu_to_node(); + init_gi_nodes(); io_apic_init_mappings(); diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index aa76ec2d359b..fc630dc6764e 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -747,6 +747,20 @@ static void __init init_memory_less_node(int nid) */ } +/* + * Generic Initiator Nodes may have neither CPU nor Memory. + * At this stage if either of the others were present we would + * already be online. + */ +void __init init_gi_nodes(void) +{ + int nid; + + for_each_node_state(nid, N_GENERIC_INITIATOR) + if (!node_online(nid)) + init_memory_less_node(nid); +} + /* * Setup early cpu_to_node. * From patchwork Tue Aug 18 17:04:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247905 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3285008ect; Tue, 18 Aug 2020 10:06:15 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzlLHYiywNKuZCWHE6SuQlCT34YR3nna6BoPdysizJpDaLlJyPCnLaELRTJOt1A3I/TTDJH X-Received: by 2002:aa7:d293:: with SMTP id w19mr20163599edq.119.1597770375504; Tue, 18 Aug 2020 10:06:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770375; cv=none; d=google.com; s=arc-20160816; b=ahd2GdCoXpouwZ3qf43H6NiANYmF16SUiM4xWBPn7YPD+DEeblckvQLLL/RORyMmO2 Qol3S6dMHcVBsc7Oy12VyuFfTp3EIFLyBvK5apm3+N2WuhTwc/leXlMEfekpeCp8HbSx xaepyZBsT2N8NN2e7YZ5XKiay1nAOdkNkUK596T/x0LBTLaoyi4sSU6gM2dkthYBV5xZ I5KAR/JAVrUO2ceX/iTIXc+owFEI0oydxMVK4hASu4SbnQxdK96SM4z9vqqORIFntv1q 0fG3245Y8r/Wd9RFU4dT1V3bP01/MD6WTu4Az6nkMWRGkPmZtp8Zew5vNofoOwEcxdSm eRUg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=pN6PwSVplNWT3x2XxWu6Ts7O8rVeCxruJcHUMqzHgh0=; b=atX3HVhDy2/5grir2dTn3BWnNi1/ckdOdoNAdqgDtA047rKEvaFFcWPWe2s/j/SM+t BLTW+TFhCdNvjFgtbXma1LAOIkXXR506cua1AuYHnuTzuxd2hmt7vtKXl8SeXNaDTXjG cFvYJ/vWa5BnhoLhGMl23w4CDr+6exHT4WFtm4YzGx1Mw4wjZEqKvcXmCJUMl07N4pMp RLbRW4/9YuTXRk2PBhwGk0cZlcMok2sfjbhbf+0Dj6lWBEmLEIEOiCE4J3jpv75L+OXq BxIL23EvPjNwO29Sa8E1UC4D5xBmNh6S8cNfNXDZm1pfyfBZM/72lBWD6BzAMTQHqxoO 2B8A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id x16si13836657ejy.527.2020.08.18.10.06.15; Tue, 18 Aug 2020 10:06:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728122AbgHRRGL (ORCPT + 7 others); Tue, 18 Aug 2020 13:06:11 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2657 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728480AbgHRRGI (ORCPT ); Tue, 18 Aug 2020 13:06:08 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 95F6C2CBE99186A757D0; Tue, 18 Aug 2020 18:06:07 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:06:07 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 3/6] ACPI: Let ACPI know we support Generic Initiator Affinity Structures Date: Wed, 19 Aug 2020 01:04:14 +0800 Message-ID: <20200818170417.1515975-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Until we tell ACPI that we support generic initiators, it will have to operate in fall back domain mode and all _PXM entries should be on existing non GI domains. This patch sets the relevant OSC bit to make that happen. Signed-off-by: Jonathan Cameron --- drivers/acpi/bus.c | 1 + include/linux/acpi.h | 1 + 2 files changed, 2 insertions(+) -- 2.19.1 diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 54002670cb7a..0ac96fb67515 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -302,6 +302,7 @@ static void acpi_bus_osc_support(void) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; #ifdef CONFIG_X86 if (boot_cpu_has(X86_FEATURE_HWP)) { diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 1e4cdc6c7ae2..1321518a53d2 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -546,6 +546,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); #define OSC_SB_PCLPI_SUPPORT 0x00000080 #define OSC_SB_OSLPI_SUPPORT 0x00000100 #define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000 +#define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000 extern bool osc_sb_apei_support_acked; extern bool osc_pc_lpi_support_confirmed; From patchwork Tue Aug 18 17:04:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247906 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3285367ect; Tue, 18 Aug 2020 10:06:48 -0700 (PDT) X-Google-Smtp-Source: ABdhPJytoQyNpZXgwsEk7bzsxvoa56MW1KPAOXp2VnLHqzz17yJR7Q/A4GB7oDmcQ1T+WstO0NW+ X-Received: by 2002:aa7:cdd0:: with SMTP id h16mr20877348edw.116.1597770408222; Tue, 18 Aug 2020 10:06:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770408; cv=none; d=google.com; s=arc-20160816; b=WgMQS0yoGjkSUvNzv9us1I9Iav98EYN5coV8k+Ma6w/HTrwK25gya2031F/u0SjVut XCQhwj4aGVUL5gFanoRPDERiMJk6/qhbkoPVo3eASUJhFoT6CTqw55KbAG/JVHb+Gzor BAPZUd27TS68NHCfysgq/Arv2qysAvBibh1qRq7may5L86BTXJtzAEvh0oksXublVyiC 9JKlXoY8H3Ykbn98cQFWezCDt7YMMjdn/IKOaq5ysnNpZ69FySaPr0lLB0nycpa0IZp6 TWYb02HXt6ta8WHuhek+F7KKLUeJniy5MljuXq/uZU6S/9Doi4sfqLa5zO815uklXb/Y Xd0w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=mbxLlEWIUQzEcWeGGGAuTvzr4aHzAeYjxzFInWevZGM=; b=SnsPxuE6tty0JMBKsxc58i9k3om01tIT/YedS2gJqwDejIfmIuC6uebysLppA8KUHD aCQz8TYhR+3PfYHYDiMSanDafUzufHNmCR45BBH4oHoAyH7TmNHmn4M0q3qr0fTJrwMc Bw2Iv95aN+kg1+P554lNvlh5yVHBc8PWT2Dayolez0QbGSCIdYZJp7GHa6us8NNml9BS ACtTgVE52oS3aKrlgei5lQMK09gMC2N34oA3Z159Rq1CzGc2Y/TFq7LGLeLPM0FRIlR3 xIPfAR99UvDBy6n5Izrf/FwGC4DIqGRdmADlVXz+3k8/1dBEhjlK0d0vJSIOzWWa7TbA mqMw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id mm19si14913477ejb.501.2020.08.18.10.06.48; Tue, 18 Aug 2020 10:06:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726721AbgHRRGj (ORCPT + 7 others); Tue, 18 Aug 2020 13:06:39 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2658 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728532AbgHRRGj (ORCPT ); Tue, 18 Aug 2020 13:06:39 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id CFA31B454DC57785B1B3; Tue, 18 Aug 2020 18:06:37 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:06:37 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 4/6] ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3 Date: Wed, 19 Aug 2020 01:04:15 +0800 Message-ID: <20200818170417.1515975-5-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org In ACPI 6.3, the Memory Proximity Domain Attributes Structure changed substantially. One of those changes was that the flag for "Memory Proximity Domain field is valid" was deprecated. This was because the field "Proximity Domain for the Memory" became a required field and hence having a validity flag makes no sense. So the correct logic is to always assume the field is there. Current code assumes it never is. Signed-off-by: Jonathan Cameron --- drivers/acpi/numa/hmat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.19.1 diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index 2c32cfb72370..07cfe50136e0 100644 --- a/drivers/acpi/numa/hmat.c +++ b/drivers/acpi/numa/hmat.c @@ -424,7 +424,7 @@ static int __init hmat_parse_proximity_domain(union acpi_subtable_headers *heade pr_info("HMAT: Memory Flags:%04x Processor Domain:%u Memory Domain:%u\n", p->flags, p->processor_PD, p->memory_PD); - if (p->flags & ACPI_HMAT_MEMORY_PD_VALID && hmat_revision == 1) { + if ((p->flags & ACPI_HMAT_MEMORY_PD_VALID && hmat_revision == 1) || hmat_revision == 2) { target = find_mem_target(p->memory_PD); if (!target) { pr_debug("HMAT: Memory Domain missing from SRAT\n"); From patchwork Tue Aug 18 17:04:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247907 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3285675ect; Tue, 18 Aug 2020 10:07:17 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzA3os6G+0RKuwcddre5T7pJJmaoGoE8L+UtFCTmJSKGM7NFw5kHV+G1w+w9EaFcSV3/UmT X-Received: by 2002:a17:906:551:: with SMTP id k17mr246063eja.322.1597770437027; Tue, 18 Aug 2020 10:07:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770437; cv=none; d=google.com; s=arc-20160816; b=RPtLuXbJFFsGADB7cND18klzszAgPrQPUbVKccNg8GeZ83y6VQ+DHUB1Cj1aQaPIO2 OIfxyOam3uR7Cs5yHI1PB/KBkai9eLcGq8ulHTou2MXip2F2+Mu4/zwI7KGiTA8gkp/y R5g3c7IulgxWGrml2dqa4+uHN/nOlD6qngknbXYRvpS7LBtk4+vh50+LzLZaBlkK5VBq IbPrsmcyeT1hAPJkHbgyRhN9F7I2dM8Z59GSJp9oqVq6EIIGEJPfe3lzEwTJ1kAhD/dl qMhbsh662QYxmm9Pk4u1CdTTgrIqftl+gHqFD/mbxayJcd2MBZp5TY9yQ3fCLlucLvRT 4WvA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=076+0+pjiNWJ1Q53e4lcVQ37wOcPFC5qK7tEeJEaaNA=; b=wHCgC2j4CN+Pva2mVhC2u9osU7jN9GAGMoNCDt7VlSJobqWuelOfipPkCnVQTKn3lz bZHtsLI6lhtSVLhKciWmQuKpuFAvLLUKaRIOGJy8Edn2GzPp0QEV9JwNyLZ2qw5r0dRZ HhGkuemPmQ14EOFeHaWApGHbWV16TT9b4IB/iScnMMnBmMgU600WVC8mSK53qbYZc3wg NALBiWycAYLGUBYM8x+JivK/ouJN4vNCxs9aVbe1rXPj7DQsDw4+Wm5oI6IE9Oet50Z6 JoakeC8D6CRB8b/Y+LAXQlkk8JRKMrIbIMwd+xZ/3nw9Ix6Z1sIXl76xIQWGcuioGpGd B0WA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id r17si13784976eji.277.2020.08.18.10.07.16; Tue, 18 Aug 2020 10:07:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728555AbgHRRHL (ORCPT + 7 others); Tue, 18 Aug 2020 13:07:11 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2659 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728553AbgHRRHJ (ORCPT ); Tue, 18 Aug 2020 13:07:09 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id 175EE3FB0546F7BFA5F9; Tue, 18 Aug 2020 18:07:08 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:07:07 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 5/6] node: Add access1 class to represent CPU to memory characteristics Date: Wed, 19 Aug 2020 01:04:16 +0800 Message-ID: <20200818170417.1515975-6-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org New access1 class is nearly the same as access0, but always provides characteristics for CPUs to memory. The existing access0 class provides characteristics to nearest or direct connnect initiator which may be a Generic Initiator such as a GPU or network adapter. This new class allows thread placement on CPUs to be performed so as to give optimal access characteristics to memory, even if that memory is for example attached to a GPU or similar and only accessible to the CPU via an appropriate bus. Suggested-by: Dan Willaims Signed-off-by: Jonathan Cameron --- drivers/acpi/numa/hmat.c | 87 +++++++++++++++++++++++++++++++--------- 1 file changed, 68 insertions(+), 19 deletions(-) -- 2.19.1 diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index 07cfe50136e0..00b4cdbefb5e 100644 --- a/drivers/acpi/numa/hmat.c +++ b/drivers/acpi/numa/hmat.c @@ -56,7 +56,7 @@ struct memory_target { unsigned int memory_pxm; unsigned int processor_pxm; struct resource memregions; - struct node_hmem_attrs hmem_attrs; + struct node_hmem_attrs hmem_attrs[2]; struct list_head caches; struct node_cache_attrs cache_attrs; bool registered; @@ -65,6 +65,7 @@ struct memory_target { struct memory_initiator { struct list_head node; unsigned int processor_pxm; + bool has_cpu; }; struct memory_locality { @@ -108,6 +109,7 @@ static __init void alloc_memory_initiator(unsigned int cpu_pxm) return; initiator->processor_pxm = cpu_pxm; + initiator->has_cpu = node_state(pxm_to_node(cpu_pxm), N_CPU); list_add_tail(&initiator->node, &initiators); } @@ -215,28 +217,28 @@ static u32 hmat_normalize(u16 entry, u64 base, u8 type) } static void hmat_update_target_access(struct memory_target *target, - u8 type, u32 value) + u8 type, u32 value, int access) { switch (type) { case ACPI_HMAT_ACCESS_LATENCY: - target->hmem_attrs.read_latency = value; - target->hmem_attrs.write_latency = value; + target->hmem_attrs[access].read_latency = value; + target->hmem_attrs[access].write_latency = value; break; case ACPI_HMAT_READ_LATENCY: - target->hmem_attrs.read_latency = value; + target->hmem_attrs[access].read_latency = value; break; case ACPI_HMAT_WRITE_LATENCY: - target->hmem_attrs.write_latency = value; + target->hmem_attrs[access].write_latency = value; break; case ACPI_HMAT_ACCESS_BANDWIDTH: - target->hmem_attrs.read_bandwidth = value; - target->hmem_attrs.write_bandwidth = value; + target->hmem_attrs[access].read_bandwidth = value; + target->hmem_attrs[access].write_bandwidth = value; break; case ACPI_HMAT_READ_BANDWIDTH: - target->hmem_attrs.read_bandwidth = value; + target->hmem_attrs[access].read_bandwidth = value; break; case ACPI_HMAT_WRITE_BANDWIDTH: - target->hmem_attrs.write_bandwidth = value; + target->hmem_attrs[access].write_bandwidth = value; break; default: break; @@ -329,8 +331,12 @@ static __init int hmat_parse_locality(union acpi_subtable_headers *header, if (mem_hier == ACPI_HMAT_MEMORY) { target = find_mem_target(targs[targ]); - if (target && target->processor_pxm == inits[init]) - hmat_update_target_access(target, type, value); + if (target && target->processor_pxm == inits[init]) { + hmat_update_target_access(target, type, value, 0); + /* If the node has a CPU, update access 1*/ + if (node_state(pxm_to_node(inits[init]), N_CPU)) + hmat_update_target_access(target, type, value, 1); + } } } } @@ -566,6 +572,7 @@ static void hmat_register_target_initiators(struct memory_target *target) unsigned int mem_nid, cpu_nid; struct memory_locality *loc = NULL; u32 best = 0; + bool access0done = false; int i; mem_nid = pxm_to_node(target->memory_pxm); @@ -577,7 +584,11 @@ static void hmat_register_target_initiators(struct memory_target *target) if (target->processor_pxm != PXM_INVAL) { cpu_nid = pxm_to_node(target->processor_pxm); register_memory_node_under_compute_node(mem_nid, cpu_nid, 0); - return; + access0done = true; + if (node_state(cpu_nid, N_CPU)) { + register_memory_node_under_compute_node(mem_nid, cpu_nid, 1); + return; + } } if (list_empty(&localities)) @@ -591,6 +602,40 @@ static void hmat_register_target_initiators(struct memory_target *target) */ bitmap_zero(p_nodes, MAX_NUMNODES); list_sort(p_nodes, &initiators, initiator_cmp); + if (!access0done) { + for (i = WRITE_LATENCY; i <= READ_BANDWIDTH; i++) { + loc = localities_types[i]; + if (!loc) + continue; + + best = 0; + list_for_each_entry(initiator, &initiators, node) { + u32 value; + + if (!test_bit(initiator->processor_pxm, p_nodes)) + continue; + + value = hmat_initiator_perf(target, initiator, + loc->hmat_loc); + if (hmat_update_best(loc->hmat_loc->data_type, value, &best)) + bitmap_clear(p_nodes, 0, initiator->processor_pxm); + if (value != best) + clear_bit(initiator->processor_pxm, p_nodes); + } + if (best) + hmat_update_target_access(target, loc->hmat_loc->data_type, best, 0); + } + + for_each_set_bit(i, p_nodes, MAX_NUMNODES) { + cpu_nid = pxm_to_node(i); + register_memory_node_under_compute_node(mem_nid, cpu_nid, 0); + } + } + + /* Access 1 ignores Generic Initiators */ + bitmap_zero(p_nodes, MAX_NUMNODES); + list_sort(p_nodes, &initiators, initiator_cmp); + best = 0; for (i = WRITE_LATENCY; i <= READ_BANDWIDTH; i++) { loc = localities_types[i]; if (!loc) @@ -600,6 +645,10 @@ static void hmat_register_target_initiators(struct memory_target *target) list_for_each_entry(initiator, &initiators, node) { u32 value; + if (!initiator->has_cpu) { + clear_bit(initiator->processor_pxm, p_nodes); + continue; + } if (!test_bit(initiator->processor_pxm, p_nodes)) continue; @@ -610,12 +659,11 @@ static void hmat_register_target_initiators(struct memory_target *target) clear_bit(initiator->processor_pxm, p_nodes); } if (best) - hmat_update_target_access(target, loc->hmat_loc->data_type, best); + hmat_update_target_access(target, loc->hmat_loc->data_type, best, 1); } - for_each_set_bit(i, p_nodes, MAX_NUMNODES) { cpu_nid = pxm_to_node(i); - register_memory_node_under_compute_node(mem_nid, cpu_nid, 0); + register_memory_node_under_compute_node(mem_nid, cpu_nid, 1); } } @@ -628,10 +676,10 @@ static void hmat_register_target_cache(struct memory_target *target) node_add_cache(mem_nid, &tcache->cache_attrs); } -static void hmat_register_target_perf(struct memory_target *target) +static void hmat_register_target_perf(struct memory_target *target, int access) { unsigned mem_nid = pxm_to_node(target->memory_pxm); - node_set_perf_attrs(mem_nid, &target->hmem_attrs, 0); + node_set_perf_attrs(mem_nid, &target->hmem_attrs[access], access); } static void hmat_register_target_device(struct memory_target *target, @@ -733,7 +781,8 @@ static void hmat_register_target(struct memory_target *target) if (!target->registered) { hmat_register_target_initiators(target); hmat_register_target_cache(target); - hmat_register_target_perf(target); + hmat_register_target_perf(target, 0); + hmat_register_target_perf(target, 1); target->registered = true; } mutex_unlock(&target_lock); From patchwork Tue Aug 18 17:04:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 247908 Delivered-To: patch@linaro.org Received: by 2002:a54:3b12:0:0:0:0:0 with SMTP id j18csp3285949ect; Tue, 18 Aug 2020 10:07:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxqCqs+qTwws6e1nnqGtZ5Y9LBp2TTdQUp1AveDkayc+74qsRQR3oci6zD1zeyJ8o81lQe5 X-Received: by 2002:a05:6402:44e:: with SMTP id p14mr21269683edw.1.1597770460706; Tue, 18 Aug 2020 10:07:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597770460; cv=none; d=google.com; s=arc-20160816; b=vpBtXWU0lcCyVMet1yR82FE1uFw4xtNZzd/dy+3KSMXH9gC79pJdyQEmnOUYRslDeZ nlbCnI5Z2RTP1WbP/RwWULLMuB15Mu7DaP6dkM/KA9EG6Erf1TAPgTF+zW/TS21YC5to W86lw0HgLbxfhGSvkHwISCK/hhCeFqupfWoI3dvj54nu6PlZNDu+Pp+RodUZKulO1jbc gu2Hy/ZqN2lPvk6IkXX/j0M2jJ/4qYX75vrnwbbgO7v0sVRN0B8iQgT2hkggqRI5x8+/ FZzsl1snw6fFnoXQTJqC3bOvCy77Yrbzv084cLGYP2PdZXJEMlzJqRq/yXorAuPSWaGZ /PQw== ARC-Message-Signature: i=1; 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[23.128.96.18]) by mx.google.com with ESMTP id t15si13441583edy.289.2020.08.18.10.07.40; Tue, 18 Aug 2020 10:07:40 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728284AbgHRRHj (ORCPT + 7 others); Tue, 18 Aug 2020 13:07:39 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2660 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727773AbgHRRHj (ORCPT ); Tue, 18 Aug 2020 13:07:39 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 4A8738797439592A58F3; Tue, 18 Aug 2020 18:07:38 +0100 (IST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1913.5; Tue, 18 Aug 2020 18:07:38 +0100 From: Jonathan Cameron To: , , , CC: Lorenzo Pieralisi , Bjorn Helgaas , , , Ingo Molnar , Thomas Gleixner , , Dan Williams , Brice Goglin , Sean V Kelley , Jonathan Cameron Subject: [PATCH v8 6/6] docs: mm: numaperf.rst Add brief description for access class 1. Date: Wed, 19 Aug 2020 01:04:17 +0800 Message-ID: <20200818170417.1515975-7-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> References: <20200818170417.1515975-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml702-chm.china.huawei.com (10.201.108.51) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Try to make minimal changes to the document which already describes access class 0 in a generic fashion (including IO initiatiors that are not CPUs). Signed-off-by: Jonathan Cameron --- Documentation/admin-guide/mm/numaperf.rst | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.19.1 diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst index 4d69ef1de830..b89bb85eac75 100644 --- a/Documentation/admin-guide/mm/numaperf.rst +++ b/Documentation/admin-guide/mm/numaperf.rst @@ -56,6 +56,11 @@ nodes' access characteristics share the same performance relative to other linked initiator nodes. Each target within an initiator's access class, though, do not necessarily perform the same as each other. +The access class "1" is used to allow differentiation between initiators +that are CPUs and hence suitable for generic task scheduling, and +IO initiators such as GPUs and NICs. Unlike access class 0, only +nodes containing CPUs are considered. + ================ NUMA Performance ================ @@ -88,6 +93,9 @@ The latency attributes are provided in nanoseconds. The values reported here correspond to the rated latency and bandwidth for the platform. +Access class 1, takes the same form, but only includes values for CPU to +memory activity. + ========== NUMA Cache ==========