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513 lines
13 KiB
513 lines
13 KiB
// 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 <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) "ACPI: " fmt |
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|
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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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|
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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) |
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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 = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE; |
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if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG)) |
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goto out_err; |
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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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#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 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. |
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*/ |
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/* SRAT: System Resource Affinity Table */ |
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if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
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struct acpi_subtable_proc srat_proc[4]; |
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memset(srat_proc, 0, sizeof(srat_proc)); |
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srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY; |
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srat_proc[0].handler = acpi_parse_processor_affinity; |
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srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY; |
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srat_proc[1].handler = acpi_parse_x2apic_affinity; |
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srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY; |
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srat_proc[2].handler = acpi_parse_gicc_affinity; |
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srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY; |
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srat_proc[3].handler = acpi_parse_gi_affinity; |
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acpi_table_parse_entries_array(ACPI_SIG_SRAT, |
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sizeof(struct acpi_table_srat), |
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srat_proc, ARRAY_SIZE(srat_proc), 0); |
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cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, |
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acpi_parse_memory_affinity, 0); |
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} |
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/* SLIT: System Locality Information Table */ |
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acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
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if (cnt < 0) |
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return cnt; |
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else if (!parsed_numa_memblks) |
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return -ENOENT; |
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return 0; |
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} |
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static int acpi_get_pxm(acpi_handle h) |
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{ |
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unsigned long long pxm; |
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acpi_status status; |
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acpi_handle handle; |
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acpi_handle phandle = h; |
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do { |
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handle = phandle; |
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status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); |
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if (ACPI_SUCCESS(status)) |
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return pxm; |
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status = acpi_get_parent(handle, &phandle); |
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} while (ACPI_SUCCESS(status)); |
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return -1; |
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} |
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int acpi_get_node(acpi_handle handle) |
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{ |
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int pxm; |
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pxm = acpi_get_pxm(handle); |
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return pxm_to_node(pxm); |
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} |
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EXPORT_SYMBOL(acpi_get_node);
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