![Igor Mammedov](/assets/img/avatar_default.png)
max_possible_pfn will be used for tracking max possible PFN for memory that isn't present in E820 table and could be hotplugged later. By default max_possible_pfn is initialized with max_pfn, but later it could be updated with highest PFN of hotpluggable memory ranges declared in ACPI SRAT table if any present. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: fujita.tomonori@lab.ntt.co.jp Cc: konrad.wilk@oracle.com Cc: pbonzini@redhat.com Cc: revers@redhat.com Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1449234426-273049-2-git-send-email-imammedo@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
226 lines
5.4 KiB
C
226 lines
5.4 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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int acpi_numa __initdata;
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static __init int setup_node(int pxm)
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{
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return acpi_map_pxm_to_node(pxm);
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}
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static __init void bad_srat(void)
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{
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printk(KERN_ERR "SRAT: SRAT not used.\n");
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acpi_numa = -1;
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}
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static __init inline int srat_disabled(void)
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{
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return acpi_numa < 0;
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}
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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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/* 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 = setup_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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acpi_numa = 1;
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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 = setup_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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acpi_numa = 1;
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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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#ifdef CONFIG_MEMORY_HOTPLUG
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static inline int save_add_info(void) {return 1;}
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#else
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static inline int save_add_info(void) {return 0;}
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#endif
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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 && !save_add_info())
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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 = setup_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 -1;
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}
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void __init acpi_numa_arch_fixup(void) {}
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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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