571 lines
14 KiB
C
571 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* acpi_numa.c - ACPI NUMA support
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*
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* Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
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*/
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/acpi.h>
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#include <linux/memblock.h>
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#include <linux/numa.h>
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#include <linux/nodemask.h>
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#include <linux/topology.h>
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static nodemask_t nodes_found_map = NODE_MASK_NONE;
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/* maps to convert between proximity domain and logical node ID */
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static int pxm_to_node_map[MAX_PXM_DOMAINS]
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= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
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static int node_to_pxm_map[MAX_NUMNODES]
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= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
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unsigned char acpi_srat_revision __initdata;
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static int acpi_numa __initdata;
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void __init disable_srat(void)
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{
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acpi_numa = -1;
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}
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int pxm_to_node(int pxm)
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{
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if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
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return NUMA_NO_NODE;
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return pxm_to_node_map[pxm];
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}
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EXPORT_SYMBOL(pxm_to_node);
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int node_to_pxm(int node)
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{
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if (node < 0)
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return PXM_INVAL;
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return node_to_pxm_map[node];
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}
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static void __acpi_map_pxm_to_node(int pxm, int node)
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{
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if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
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pxm_to_node_map[pxm] = node;
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if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
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node_to_pxm_map[node] = pxm;
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}
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int acpi_map_pxm_to_node(int pxm)
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{
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int node;
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if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
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return NUMA_NO_NODE;
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node = pxm_to_node_map[pxm];
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if (node == NUMA_NO_NODE) {
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if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
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return NUMA_NO_NODE;
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node = first_unset_node(nodes_found_map);
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__acpi_map_pxm_to_node(pxm, node);
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node_set(node, nodes_found_map);
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}
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return node;
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}
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EXPORT_SYMBOL(acpi_map_pxm_to_node);
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static void __init
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acpi_table_print_srat_entry(struct acpi_subtable_header *header)
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{
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switch (header->type) {
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case ACPI_SRAT_TYPE_CPU_AFFINITY:
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{
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struct acpi_srat_cpu_affinity *p =
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(struct acpi_srat_cpu_affinity *)header;
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pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
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p->apic_id, p->local_sapic_eid,
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p->proximity_domain_lo,
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(p->flags & ACPI_SRAT_CPU_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
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{
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struct acpi_srat_mem_affinity *p =
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(struct acpi_srat_mem_affinity *)header;
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pr_debug("SRAT Memory (0x%llx length 0x%llx) in proximity domain %d %s%s%s\n",
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(unsigned long long)p->base_address,
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(unsigned long long)p->length,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_MEM_ENABLED) ?
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"enabled" : "disabled",
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(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
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" hot-pluggable" : "",
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(p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
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" non-volatile" : "");
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}
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break;
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case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
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{
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struct acpi_srat_x2apic_cpu_affinity *p =
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(struct acpi_srat_x2apic_cpu_affinity *)header;
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pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
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p->apic_id,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_CPU_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_GICC_AFFINITY:
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{
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struct acpi_srat_gicc_affinity *p =
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(struct acpi_srat_gicc_affinity *)header;
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pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
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p->acpi_processor_uid,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GICC_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_GENERIC_AFFINITY:
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{
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struct acpi_srat_generic_affinity *p =
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(struct acpi_srat_generic_affinity *)header;
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if (p->device_handle_type == 0) {
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/*
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* For pci devices this may be the only place they
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* are assigned a proximity domain
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*/
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pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n",
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*(u16 *)(&p->device_handle[0]),
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*(u16 *)(&p->device_handle[2]),
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
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"enabled" : "disabled");
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} else {
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/*
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* In this case we can rely on the device having a
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* proximity domain reference
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*/
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pr_debug("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n",
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(char *)(&p->device_handle[0]),
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(char *)(&p->device_handle[8]),
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
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"enabled" : "disabled");
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}
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}
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break;
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default:
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pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
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header->type);
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break;
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}
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}
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/*
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* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
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* up the NUMA heuristics which wants the local node to have a smaller
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* distance than the others.
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* Do some quick checks here and only use the SLIT if it passes.
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*/
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static int __init slit_valid(struct acpi_table_slit *slit)
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{
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int i, j;
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int d = slit->locality_count;
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for (i = 0; i < d; i++) {
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for (j = 0; j < d; j++) {
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u8 val = slit->entry[d*i + j];
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if (i == j) {
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if (val != LOCAL_DISTANCE)
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return 0;
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} else if (val <= LOCAL_DISTANCE)
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return 0;
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}
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}
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return 1;
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}
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void __init bad_srat(void)
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{
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pr_err("SRAT: SRAT not used.\n");
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disable_srat();
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}
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int __init srat_disabled(void)
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{
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return acpi_numa < 0;
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}
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#if defined(CONFIG_X86) || defined(CONFIG_ARM64) || defined(CONFIG_LOONGARCH)
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/*
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* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
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* I/O localities since SRAT does not list them. I/O localities are
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* not supported at this point.
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*/
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void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
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{
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int i, j;
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for (i = 0; i < slit->locality_count; i++) {
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const int from_node = pxm_to_node(i);
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if (from_node == NUMA_NO_NODE)
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continue;
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for (j = 0; j < slit->locality_count; j++) {
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const int to_node = pxm_to_node(j);
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if (to_node == NUMA_NO_NODE)
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continue;
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numa_set_distance(from_node, to_node,
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slit->entry[slit->locality_count * i + j]);
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}
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}
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}
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/*
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* Default callback for parsing of the Proximity Domain <-> Memory
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* Area mappings
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*/
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int __init
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acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
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{
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u64 start, end;
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u32 hotpluggable;
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int node, pxm;
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if (srat_disabled())
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goto out_err;
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if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
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pr_err("SRAT: Unexpected header length: %d\n",
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ma->header.length);
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goto out_err_bad_srat;
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}
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if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
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goto out_err;
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hotpluggable = IS_ENABLED(CONFIG_MEMORY_HOTPLUG) &&
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(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE);
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start = ma->base_address;
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end = start + ma->length;
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pxm = ma->proximity_domain;
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if (acpi_srat_revision <= 1)
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pxm &= 0xff;
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node = acpi_map_pxm_to_node(pxm);
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if (node == NUMA_NO_NODE) {
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pr_err("SRAT: Too many proximity domains.\n");
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goto out_err_bad_srat;
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}
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if (numa_add_memblk(node, start, end) < 0) {
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pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
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node, (unsigned long long) start,
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(unsigned long long) end - 1);
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goto out_err_bad_srat;
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}
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node_set(node, numa_nodes_parsed);
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pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
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node, pxm,
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(unsigned long long) start, (unsigned long long) end - 1,
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hotpluggable ? " hotplug" : "",
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ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
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/* Mark hotplug range in memblock. */
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if (hotpluggable && memblock_mark_hotplug(start, ma->length))
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pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
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(unsigned long long)start, (unsigned long long)end - 1);
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max_possible_pfn = max(max_possible_pfn, PFN_UP(end - 1));
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return 0;
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out_err_bad_srat:
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bad_srat();
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out_err:
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return -EINVAL;
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}
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static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
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void *arg, const unsigned long table_end)
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{
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struct acpi_cedt_cfmws *cfmws;
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int *fake_pxm = arg;
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u64 start, end;
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int node;
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cfmws = (struct acpi_cedt_cfmws *)header;
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start = cfmws->base_hpa;
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end = cfmws->base_hpa + cfmws->window_size;
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/* Skip if the SRAT already described the NUMA details for this HPA */
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node = phys_to_target_node(start);
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if (node != NUMA_NO_NODE)
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return 0;
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node = acpi_map_pxm_to_node(*fake_pxm);
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if (node == NUMA_NO_NODE) {
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pr_err("ACPI NUMA: Too many proximity domains while processing CFMWS.\n");
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return -EINVAL;
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}
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if (numa_add_memblk(node, start, end) < 0) {
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/* CXL driver must handle the NUMA_NO_NODE case */
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pr_warn("ACPI NUMA: Failed to add memblk for CFMWS node %d [mem %#llx-%#llx]\n",
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node, start, end);
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}
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node_set(node, numa_nodes_parsed);
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/* Set the next available fake_pxm value */
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(*fake_pxm)++;
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return 0;
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}
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#else
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static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
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void *arg, const unsigned long table_end)
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{
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return 0;
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}
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#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
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static int __init acpi_parse_slit(struct acpi_table_header *table)
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{
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struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
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if (!slit_valid(slit)) {
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pr_info("SLIT table looks invalid. Not used.\n");
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return -EINVAL;
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}
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acpi_numa_slit_init(slit);
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return 0;
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}
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void __init __weak
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acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
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{
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pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
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}
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static int __init
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acpi_parse_x2apic_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
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processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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acpi_numa_x2apic_affinity_init(processor_affinity);
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return 0;
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}
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static int __init
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acpi_parse_processor_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_cpu_affinity *processor_affinity;
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processor_affinity = (struct acpi_srat_cpu_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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acpi_numa_processor_affinity_init(processor_affinity);
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return 0;
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}
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static int __init
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acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_gicc_affinity *processor_affinity;
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processor_affinity = (struct acpi_srat_gicc_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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acpi_numa_gicc_affinity_init(processor_affinity);
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return 0;
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}
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#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
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static int __init
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acpi_parse_gi_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_generic_affinity *gi_affinity;
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int node;
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gi_affinity = (struct acpi_srat_generic_affinity *)header;
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if (!gi_affinity)
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return -EINVAL;
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acpi_table_print_srat_entry(&header->common);
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if (!(gi_affinity->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED))
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return -EINVAL;
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node = acpi_map_pxm_to_node(gi_affinity->proximity_domain);
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if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
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pr_err("SRAT: Too many proximity domains.\n");
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return -EINVAL;
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}
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node_set(node, numa_nodes_parsed);
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node_set_state(node, N_GENERIC_INITIATOR);
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return 0;
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}
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#else
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static int __init
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acpi_parse_gi_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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return 0;
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}
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#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
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static int __initdata parsed_numa_memblks;
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static int __init
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acpi_parse_memory_affinity(union acpi_subtable_headers * header,
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const unsigned long end)
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{
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struct acpi_srat_mem_affinity *memory_affinity;
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memory_affinity = (struct acpi_srat_mem_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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if (!acpi_numa_memory_affinity_init(memory_affinity))
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parsed_numa_memblks++;
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return 0;
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}
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static int __init acpi_parse_srat(struct acpi_table_header *table)
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{
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struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
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acpi_srat_revision = srat->header.revision;
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/* Real work done in acpi_table_parse_srat below. */
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return 0;
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}
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static int __init
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acpi_table_parse_srat(enum acpi_srat_type id,
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acpi_tbl_entry_handler handler, unsigned int max_entries)
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{
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return acpi_table_parse_entries(ACPI_SIG_SRAT,
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sizeof(struct acpi_table_srat), id,
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handler, max_entries);
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}
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int __init acpi_numa_init(void)
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{
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int i, fake_pxm, cnt = 0;
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if (acpi_disabled)
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return -EINVAL;
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/*
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* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
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* SRAT cpu entries could have different order with that in MADT.
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* So go over all cpu entries in SRAT to get apicid to node mapping.
|
|
*/
|
|
|
|
/* SRAT: System Resource Affinity Table */
|
|
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
|
|
struct acpi_subtable_proc srat_proc[4];
|
|
|
|
memset(srat_proc, 0, sizeof(srat_proc));
|
|
srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
|
|
srat_proc[0].handler = acpi_parse_processor_affinity;
|
|
srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
|
|
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),
|
|
srat_proc, ARRAY_SIZE(srat_proc), 0);
|
|
|
|
cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
|
|
acpi_parse_memory_affinity, 0);
|
|
}
|
|
|
|
/* SLIT: System Locality Information Table */
|
|
acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
|
|
|
|
/*
|
|
* CXL Fixed Memory Window Structures (CFMWS) must be parsed
|
|
* after the SRAT. Create NUMA Nodes for CXL memory ranges that
|
|
* are defined in the CFMWS and not already defined in the SRAT.
|
|
* Initialize a fake_pxm as the first available PXM to emulate.
|
|
*/
|
|
|
|
/* fake_pxm is the next unused PXM value after SRAT parsing */
|
|
for (i = 0, fake_pxm = -1; i < MAX_NUMNODES - 1; i++) {
|
|
if (node_to_pxm_map[i] > fake_pxm)
|
|
fake_pxm = node_to_pxm_map[i];
|
|
}
|
|
fake_pxm++;
|
|
acpi_table_parse_cedt(ACPI_CEDT_TYPE_CFMWS, acpi_parse_cfmws,
|
|
&fake_pxm);
|
|
|
|
if (cnt < 0)
|
|
return cnt;
|
|
else if (!parsed_numa_memblks)
|
|
return -ENOENT;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_get_pxm(acpi_handle h)
|
|
{
|
|
unsigned long long pxm;
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
acpi_handle phandle = h;
|
|
|
|
do {
|
|
handle = phandle;
|
|
status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
|
|
if (ACPI_SUCCESS(status))
|
|
return pxm;
|
|
status = acpi_get_parent(handle, &phandle);
|
|
} while (ACPI_SUCCESS(status));
|
|
return -1;
|
|
}
|
|
|
|
int acpi_get_node(acpi_handle handle)
|
|
{
|
|
int pxm;
|
|
|
|
pxm = acpi_get_pxm(handle);
|
|
|
|
return pxm_to_node(pxm);
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_node);
|