830a0d1294
This per CPU log is becoming longer with more and more CPUs in system, which slows down the boot process due to the serializing nature of printk(). The value of this information is dubious and it can be retrieved by lscpu from user space if required.. Downgrade the printk() to pr_debug() so it is still accessible for debug purposes. [ tglx: Massaged changelog ] Signed-off-by: Li RongQing <lirongqing@baidu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20240806120823.17111-1-lirongqing@baidu.com
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ACPI 3.0 based NUMA setup
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* Copyright 2004 Andi Kleen, SuSE Labs.
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*
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* Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
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*
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* Called from acpi_numa_init while reading the SRAT and SLIT tables.
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* Assumes all memory regions belonging to a single proximity domain
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* are in one chunk. Holes between them will be included in the node.
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*/
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/mmzone.h>
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#include <linux/bitmap.h>
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#include <linux/init.h>
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#include <linux/topology.h>
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#include <linux/mm.h>
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#include <asm/proto.h>
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#include <asm/numa.h>
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#include <asm/e820/api.h>
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#include <asm/apic.h>
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#include <asm/uv/uv.h>
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/* Callback for Proximity Domain -> x2APIC mapping */
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void __init
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acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
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{
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int pxm, node;
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int apic_id;
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if (srat_disabled())
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return;
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if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
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bad_srat();
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return;
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}
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
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return;
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pxm = pa->proximity_domain;
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apic_id = pa->apic_id;
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if (!apic_id_valid(apic_id)) {
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pr_info("SRAT: PXM %u -> X2APIC 0x%04x ignored\n", pxm, apic_id);
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return;
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}
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node = acpi_map_pxm_to_node(pxm);
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if (node < 0) {
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
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bad_srat();
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return;
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}
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if (apic_id >= MAX_LOCAL_APIC) {
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
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return;
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}
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set_apicid_to_node(apic_id, node);
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node_set(node, numa_nodes_parsed);
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pr_debug("SRAT: PXM %u -> APIC 0x%04x -> Node %u\n", pxm, apic_id, node);
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}
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/* Callback for Proximity Domain -> LAPIC mapping */
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void __init
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
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{
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int pxm, node;
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int apic_id;
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if (srat_disabled())
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return;
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if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
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bad_srat();
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return;
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}
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
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return;
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pxm = pa->proximity_domain_lo;
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if (acpi_srat_revision >= 2)
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pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
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node = acpi_map_pxm_to_node(pxm);
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if (node < 0) {
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
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bad_srat();
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return;
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}
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if (get_uv_system_type() >= UV_X2APIC)
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apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
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else
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apic_id = pa->apic_id;
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if (apic_id >= MAX_LOCAL_APIC) {
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
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return;
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}
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set_apicid_to_node(apic_id, node);
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node_set(node, numa_nodes_parsed);
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pr_debug("SRAT: PXM %u -> APIC 0x%02x -> Node %u\n", pxm, apic_id, node);
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}
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int __init x86_acpi_numa_init(void)
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{
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int ret;
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ret = acpi_numa_init();
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if (ret < 0)
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return ret;
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return srat_disabled() ? -EINVAL : 0;
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}
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