forked from Minki/linux
fb1f4181ce
acpi_numa is default to 0, it's set to -1 when disable acpi numa or when a bad SRAT is parsed, and it's only consumed in srat_disabled() (compare it with 0) to continue parse the SRAT or not, so we don't need to set acpi_numa to 1 when we get a valid SRAT entry. Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
171 lines
4.4 KiB
C
171 lines
4.4 KiB
C
/*
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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/module.h>
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#include <linux/topology.h>
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#include <linux/bootmem.h>
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#include <linux/memblock.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.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->apic_id_valid(apic_id)) {
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printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
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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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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
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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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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
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pxm, apic_id, node);
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}
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/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
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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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goto out_err_bad_srat;
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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 < 0) {
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printk(KERN_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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goto out_err_bad_srat;
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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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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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