^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ACPI 5.1 based NUMA setup for ARM64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Lots of code was borrowed from arch/x86/mm/srat.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright 2004 Andi Kleen, SuSE Labs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2013-2016, Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Hanjun Guo <hanjun.guo@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Called from acpi_numa_init while reading the SRAT and SLIT tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Assumes all memory regions belonging to a single proximity domain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * are in one chunk. Holes between them will be included in the node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define pr_fmt(fmt) "ACPI: NUMA: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/bitmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/topology.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/numa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int acpi_early_node_map[NR_CPUS] __initdata = { NUMA_NO_NODE };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int __init acpi_numa_get_nid(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return acpi_early_node_map[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static inline int get_cpu_for_acpi_id(u32 uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) for (cpu = 0; cpu < nr_cpu_ids; cpu++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (uid == get_acpi_id_for_cpu(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int __init acpi_parse_gicc_pxm(union acpi_subtable_headers *header,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) const unsigned long end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct acpi_srat_gicc_affinity *pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int cpu, pxm, node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (srat_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) pa = (struct acpi_srat_gicc_affinity *)header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!pa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!(pa->flags & ACPI_SRAT_GICC_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pxm = pa->proximity_domain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) node = pxm_to_node(pxm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * If we can't map the UID to a logical cpu this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * means that the UID is not part of possible cpus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * so we do not need a NUMA mapping for it, skip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * the SRAT entry and keep parsing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) cpu = get_cpu_for_acpi_id(pa->acpi_processor_uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (cpu < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) acpi_early_node_map[cpu] = node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pr_info("SRAT: PXM %d -> MPIDR 0x%llx -> Node %d\n", pxm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) cpu_logical_map(cpu), node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void __init acpi_map_cpus_to_nodes(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) acpi_table_parse_entries(ACPI_SIG_SRAT, sizeof(struct acpi_table_srat),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ACPI_SRAT_TYPE_GICC_AFFINITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) acpi_parse_gicc_pxm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* Callback for Proximity Domain -> ACPI processor UID mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) void __init acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int pxm, node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (srat_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (pa->header.length < sizeof(struct acpi_srat_gicc_affinity)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pr_err("SRAT: Invalid SRAT header length: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pa->header.length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) bad_srat();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (!(pa->flags & ACPI_SRAT_GICC_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pxm = pa->proximity_domain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) node = acpi_map_pxm_to_node(pxm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) pr_err("SRAT: Too many proximity domains %d\n", pxm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) bad_srat();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) node_set(node, numa_nodes_parsed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int __init arm64_acpi_numa_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) ret = acpi_numa_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pr_info("Failed to initialise from firmware\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return srat_disabled() ? -EINVAL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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