From patchwork Wed Sep 30 14:05:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809229 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4F3A618 for ; Wed, 30 Sep 2020 14:08:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 893C4208B8 for ; Wed, 30 Sep 2020 14:08:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 893C4208B8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 993AB6B006C; Wed, 30 Sep 2020 10:08:12 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 91D566B006E; Wed, 30 Sep 2020 10:08:12 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 76D8F6B0070; Wed, 30 Sep 2020 10:08:12 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0131.hostedemail.com [216.40.44.131]) by kanga.kvack.org (Postfix) with ESMTP id 5E1D76B006C for ; Wed, 30 Sep 2020 10:08:12 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 1E50BF96 for ; Wed, 30 Sep 2020 14:08:12 +0000 (UTC) X-FDA: 77319907224.28.aunt75_5312d0b27193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin28.hostedemail.com (Postfix) with ESMTP id D90E36C11 for ; Wed, 30 Sep 2020 14:08:11 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30009:30012:30054:30080:30090,0,RBL:45.249.212.190:@huawei.com:.lbl8.mailshell.net-64.95.201.95 62.18.2.100;04y8c5puf13jidsp6b61q61zb1eyqopdapy64zm4sqjnn6nyq3ausuckkmjcx6j.1pieubohbokz5f46zxca3oywxbm13ej3s9gqo3hzzgxcndups5y8cimhiikkbgd.w-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: aunt75_5312d0b27193 X-Filterd-Recvd-Size: 6775 Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by imf10.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:08:10 +0000 (UTC) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 0BB2863F511D05B675E9; Wed, 30 Sep 2020 22:08:08 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:07:59 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 1/6] ACPI: Support Generic Initiator only domains Date: Wed, 30 Sep 2020 22:05:42 +0800 Message-ID: <20200930140547.840251-2-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 | 69 +++++++++++++++++++++++++++++++++++++++- drivers/base/node.c | 3 ++ include/linux/nodemask.h | 1 + 3 files changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c index 15bbaab8500b..d27e8585132d 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 +362,41 @@ acpi_parse_gicc_affinity(union acpi_subtable_headers *header, return 0; } +#if defined(CONFIG_X86) || defined(CONFIG_ARM64) +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; +} +#else +static int __init +acpi_parse_gi_affinity(union acpi_subtable_headers *header, + const unsigned long end) +{ + return 0; +} +#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */ + static int __initdata parsed_numa_memblks; static int __init @@ -385,7 +450,7 @@ 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 +459,8 @@ 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 Wed Sep 30 14:05:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809237 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B2394618 for ; Wed, 30 Sep 2020 14:08:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 645A32085B for ; Wed, 30 Sep 2020 14:08:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 645A32085B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A04A16B006E; Wed, 30 Sep 2020 10:08:53 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 98FCE6B0070; Wed, 30 Sep 2020 10:08:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 87CD36B0071; Wed, 30 Sep 2020 10:08:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0162.hostedemail.com [216.40.44.162]) by kanga.kvack.org (Postfix) with ESMTP id 7135A6B006E for ; Wed, 30 Sep 2020 10:08:53 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 25C578249980 for ; Wed, 30 Sep 2020 14:08:53 +0000 (UTC) X-FDA: 77319908946.21.trail62_4413e8d27193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id F3A2D18081B01 for ; Wed, 30 Sep 2020 14:08:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30054:30070:30090,0,RBL:45.249.212.190:@huawei.com:.lbl8.mailshell.net-64.95.201.95 62.18.2.100;04y8dsscosk86ydza113brwg3n4ymyp6j7zftgcqz5b7qj78341njajwyi9gn7m.k9nriospoxefn4ntn5etqm6bxuo6sr8fe9aa7j6kg9ehm46s839txf8au88wxh9.q-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: trail62_4413e8d27193 X-Filterd-Recvd-Size: 4409 Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:08:51 +0000 (UTC) Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 6AC21DCE3A8566BEA7E3; Wed, 30 Sep 2020 22:08:44 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:08:35 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 2/6] x86: Support Generic Initiator only proximity domains Date: Wed, 30 Sep 2020 22:05:43 +0800 Message-ID: <20200930140547.840251-3-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In common with memoryless domains 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 Acked-by: Borislav Petkov --- v12: Update comment to adopt passive voice. arch/x86/include/asm/numa.h | 2 ++ arch/x86/kernel/setup.c | 1 + arch/x86/mm/numa.c | 21 +++++++++++++++++++++ 3 files changed, 24 insertions(+) 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..22d3e5ade3ae 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -747,6 +747,27 @@ static void __init init_memory_less_node(int nid) */ } +/* + * A node may exist which has one or more Generic Initiators but no CPUs and no + * memory. + * + * This function must be called after init_cpu_to_node(), to ensure that any + * memoryless CPU nodes have already been brought online, and before the + * node_data[nid] is needed for zone list setup in build_all_zonelists(). + * + * When this function is called, any nodes containing either memory and/or CPUs + * will already be online and there is no need to do anything extra, even if + * they also contain one or more Generic Initiators. + */ +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 Wed Sep 30 14:05:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809239 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 73394618 for ; Wed, 30 Sep 2020 14:09:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 08A37207C3 for ; Wed, 30 Sep 2020 14:09:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 08A37207C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4D5096B005C; Wed, 30 Sep 2020 10:09:26 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 484756B006C; Wed, 30 Sep 2020 10:09:26 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 39AD86B0070; Wed, 30 Sep 2020 10:09:26 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0182.hostedemail.com [216.40.44.182]) by kanga.kvack.org (Postfix) with ESMTP id 24C856B005C for ; Wed, 30 Sep 2020 10:09:26 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id C063D2C7C for ; Wed, 30 Sep 2020 14:09:25 +0000 (UTC) X-FDA: 77319910290.08.order54_461728527193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 7DCEC1819E764 for ; Wed, 30 Sep 2020 14:09:25 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30054,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-64.95.201.95 62.18.2.100;04y8xkypnjpnm3cuq1jzybdxtx4m7oci5ksq9y3cxwwzqrg7q99px79un16bbgd.fe13qzaim8hfo5pd7wfk53dmqqnwj1rxdkkezmpfaqkpjmjii8rqmyhy8hx7np9.w-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: order54_461728527193 X-Filterd-Recvd-Size: 3343 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:09:24 +0000 (UTC) Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 10B5B856939678306194; Wed, 30 Sep 2020 22:09:20 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:09:11 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 3/6] ACPI: Let ACPI know we support Generic Initiator Affinity Structures Date: Wed, 30 Sep 2020 22:05:44 +0800 Message-ID: <20200930140547.840251-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 | 4 ++++ include/linux/acpi.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 54002670cb7a..113c661eb848 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -303,7 +303,11 @@ static void acpi_bus_osc_support(void) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; +#ifdef CONFIG_ARM64 + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; +#endif #ifdef CONFIG_X86 + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; if (boot_cpu_has(X86_FEATURE_HWP)) { capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; 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 Wed Sep 30 14:05:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809249 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AD071618 for ; Wed, 30 Sep 2020 14:10:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7F383207C3 for ; Wed, 30 Sep 2020 14:10:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F383207C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C253C6B006C; Wed, 30 Sep 2020 10:10:05 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id BD5C18E0001; Wed, 30 Sep 2020 10:10:05 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B12B86B0071; Wed, 30 Sep 2020 10:10:05 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0155.hostedemail.com [216.40.44.155]) by kanga.kvack.org (Postfix) with ESMTP id 9B80C6B006C for ; Wed, 30 Sep 2020 10:10:05 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 3ACB912E6 for ; Wed, 30 Sep 2020 14:10:05 +0000 (UTC) X-FDA: 77319911970.16.help28_270b02f27193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin16.hostedemail.com (Postfix) with ESMTP id EB4EA100355DF for ; Wed, 30 Sep 2020 14:10:04 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30012:30054,0,RBL:45.249.212.190:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95;04yrrk6ywa7porcuz9gm7a5cxee1eycnhgrh7auk8sx6adzhib8apma5d4ogft5.5omnb3t51f6mqpbeaesh4xoh3zri9uh5h4o3hykgaeypnzs4b45oeo8w88zhqej.c-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: help28_270b02f27193 X-Filterd-Recvd-Size: 3019 Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by imf04.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:10:04 +0000 (UTC) Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 8B57B4ED18E9292FB188; Wed, 30 Sep 2020 22:09:55 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:09:47 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 4/6] ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3 Date: Wed, 30 Sep 2020 22:05:45 +0800 Message-ID: <20200930140547.840251-5-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index 2c32cfb72370..6a91a55229ae 100644 --- a/drivers/acpi/numa/hmat.c +++ b/drivers/acpi/numa/hmat.c @@ -424,7 +424,8 @@ 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 ((hmat_revision == 1 && p->flags & ACPI_HMAT_MEMORY_PD_VALID) || + hmat_revision > 1) { target = find_mem_target(p->memory_PD); if (!target) { pr_debug("HMAT: Memory Domain missing from SRAT\n"); From patchwork Wed Sep 30 14:05:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809255 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 13295618 for ; Wed, 30 Sep 2020 14:10:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C350E2076B for ; Wed, 30 Sep 2020 14:10:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C350E2076B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B39286B0072; Wed, 30 Sep 2020 10:10:40 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id AE9476B0073; Wed, 30 Sep 2020 10:10:40 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9FEBF6B0074; Wed, 30 Sep 2020 10:10:40 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0024.hostedemail.com [216.40.44.24]) by kanga.kvack.org (Postfix) with ESMTP id 81A9E6B0072 for ; Wed, 30 Sep 2020 10:10:40 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 2B9B08249980 for ; Wed, 30 Sep 2020 14:10:40 +0000 (UTC) X-FDA: 77319913440.19.air78_521364e27193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin19.hostedemail.com (Postfix) with ESMTP id 07B411AD1B5 for ; Wed, 30 Sep 2020 14:10:40 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30054:30064:30070:30090,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95;04yfo5ub1tmzitc4pbpss4j8e51zmopa7tt8np1ksyckt31cn7hsuopk5myo4mn.e3mua3bzkyoctfytybthgfw7bpobtp99f6ywu8af9b3h8xxw3wwthe69ksibsa1.6-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: air78_521364e27193 X-Filterd-Recvd-Size: 9295 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf05.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:10:38 +0000 (UTC) Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id B3A89220FF08AE0B5235; Wed, 30 Sep 2020 22:10:30 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:10:23 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 5/6] node: Add access1 class to represent CPU to memory characteristics Date: Wed, 30 Sep 2020 22:05:46 +0800 Message-ID: <20200930140547.840251-6-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 | 88 +++++++++++++++++++++++++++++++--------- 1 file changed, 69 insertions(+), 19 deletions(-) diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index 6a91a55229ae..3dc251264423 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); + } } } } @@ -567,6 +573,7 @@ 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); @@ -578,7 +585,11 @@ 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)) @@ -592,6 +603,41 @@ 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) @@ -601,6 +647,10 @@ 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; @@ -611,12 +661,11 @@ 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); } } @@ -629,10 +678,10 @@ 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, @@ -734,7 +783,8 @@ 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 Wed Sep 30 14:05:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11809259 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4E8E7112C for ; Wed, 30 Sep 2020 14:11:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 16C0220789 for ; Wed, 30 Sep 2020 14:11:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16C0220789 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5B91E6B0073; Wed, 30 Sep 2020 10:11:16 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 569576B0074; Wed, 30 Sep 2020 10:11:16 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4A6356B0075; Wed, 30 Sep 2020 10:11:16 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0033.hostedemail.com [216.40.44.33]) by kanga.kvack.org (Postfix) with ESMTP id 3718C6B0073 for ; Wed, 30 Sep 2020 10:11:16 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id F130D2DFC for ; Wed, 30 Sep 2020 14:11:15 +0000 (UTC) X-FDA: 77319914910.21.rings24_0c0cdfc27193 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id BC091180A5CE6 for ; Wed, 30 Sep 2020 14:11:15 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,,RULES_HIT:30054:30070,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95;04yg5op37jneb5tz5res3tbmbugaioc371jzh7z1wkqqd4s69z3q75yr4j56ii3.jkiis48d7kbr1o44qn8rqk3qxubzgbkw4ggn6x19gmgs91951oner4d46g8zh9t.k-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: rings24_0c0cdfc27193 X-Filterd-Recvd-Size: 3148 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf20.hostedemail.com (Postfix) with ESMTP for ; Wed, 30 Sep 2020 14:11:14 +0000 (UTC) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 2D5F0D5720AF5433024F; Wed, 30 Sep 2020 22:11:10 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Wed, 30 Sep 2020 22:10:59 +0800 From: Jonathan Cameron To: , , , , Lorenzo Pieralisi , , Ingo Molnar CC: Bjorn Helgaas , , Thomas Gleixner , , Dan Williams , Brice Goglin , "Sean V Kelley" , , "Borislav Petkov" , Hanjun Guo , Jonathan Cameron Subject: [PATCH v12 6/6] docs: mm: numaperf.rst Add brief description for access class 1. Date: Wed, 30 Sep 2020 22:05:47 +0800 Message-ID: <20200930140547.840251-7-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> References: <20200930140547.840251-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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(+) diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst index 4d69ef1de830..86f2a3c4b638 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 ==========