Author: jhb
Date: Tue Jul 27 20:40:46 2010
New Revision: 210552
URL: http://svn.freebsd.org/changeset/base/210552
Log:
Add a parser for the ACPI SRAT table for amd64 and i386. It sets
PCPU(domain) for each CPU and populates a mem_affinity array suitable
for the NUMA support in the physical memory allocator.
Reviewed by: alc
Added:
head/sys/x86/acpica/
head/sys/x86/acpica/srat.c (contents, props changed)
Modified:
head/sys/conf/files.amd64
head/sys/conf/files.i386
Modified: head/sys/conf/files.amd64
==============================================================================
--- head/sys/conf/files.amd64 Tue Jul 27 20:34:37 2010 (r210551)
+++ head/sys/conf/files.amd64 Tue Jul 27 20:40:46 2010 (r210552)
@@ -302,6 +302,7 @@ contrib/x86emu/x86emu.c optional x86bio
#
# x86 shared code between IA32, AMD64 and PC98 architectures
#
+x86/acpica/srat.c optional acpi
x86/bios/smbios.c optional smbios
x86/bios/vpd.c optional vpd
x86/cpufreq/powernow.c optional cpufreq
@@ -320,4 +321,3 @@ x86/x86/io_apic.c standard
x86/x86/local_apic.c standard
x86/x86/mca.c standard
x86/x86/msi.c optional pci
-
Modified: head/sys/conf/files.i386
==============================================================================
--- head/sys/conf/files.i386 Tue Jul 27 20:34:37 2010 (r210551)
+++ head/sys/conf/files.i386 Tue Jul 27 20:40:46 2010 (r210552)
@@ -376,6 +376,7 @@ contrib/x86emu/x86emu.c optional x86bio
#
# x86 shared code between IA32, AMD64 and PC98 architectures
#
+x86/acpica/srat.c optional acpi
x86/bios/smbios.c optional smbios
x86/bios/vpd.c optional vpd
x86/cpufreq/est.c optional cpufreq
Added: head/sys/x86/acpica/srat.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/x86/acpica/srat.c Tue Jul 27 20:40:46 2010 (r210552)
@@ -0,0 +1,329 @@
+/*-
+ * Copyright (c) 2010 Advanced Computing Technologies LLC
+ * Written by: John H. Baldwin <j...@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/smp.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_param.h>
+#include <vm/vm_phys.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/actables.h>
+
+#include <machine/intr_machdep.h>
+#include <machine/apicvar.h>
+
+#include <dev/acpica/acpivar.h>
+
+struct cpu_info {
+ int enabled:1;
+ int has_memory:1;
+ int domain;
+} cpus[MAX_APIC_ID + 1];
+
+struct mem_affinity mem_info[VM_PHYSSEG_MAX + 1];
+int num_mem;
+
+static ACPI_TABLE_SRAT *srat;
+static vm_paddr_t srat_physaddr;
+
+static void srat_walk_table(acpi_subtable_handler *handler, void *arg);
+
+static void
+srat_parse_entry(ACPI_SUBTABLE_HEADER *entry, void *arg)
+{
+ ACPI_SRAT_CPU_AFFINITY *cpu;
+ ACPI_SRAT_X2APIC_CPU_AFFINITY *x2apic;
+ ACPI_SRAT_MEM_AFFINITY *mem;
+ int domain, i, slot;
+
+ switch (entry->Type) {
+ case ACPI_SRAT_TYPE_CPU_AFFINITY:
+ cpu = (ACPI_SRAT_CPU_AFFINITY *)entry;
+ domain = cpu->ProximityDomainLo |
+ cpu->ProximityDomainHi[0] << 8 |
+ cpu->ProximityDomainHi[1] << 16 |
+ cpu->ProximityDomainHi[2] << 24;
+ if (bootverbose)
+ printf("SRAT: Found CPU APIC ID %u domain %d: %s\n",
+ cpu->ApicId, domain,
+ (cpu->Flags & ACPI_SRAT_CPU_ENABLED) ?
+ "enabled" : "disabled");
+ if (!(cpu->Flags & ACPI_SRAT_CPU_ENABLED))
+ break;
+ KASSERT(!cpus[cpu->ApicId].enabled,
+ ("Duplicate local APIC ID %u", cpu->ApicId));
+ cpus[cpu->ApicId].domain = domain;
+ cpus[cpu->ApicId].enabled = 1;
+ break;
+ case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
+ x2apic = (ACPI_SRAT_X2APIC_CPU_AFFINITY *)entry;
+ if (bootverbose)
+ printf("SRAT: Found CPU APIC ID %u domain %d: %s\n",
+ x2apic->ApicId, x2apic->ProximityDomain,
+ (x2apic->Flags & ACPI_SRAT_CPU_ENABLED) ?
+ "enabled" : "disabled");
+ if (!(x2apic->Flags & ACPI_SRAT_CPU_ENABLED))
+ break;
+ KASSERT(!cpus[x2apic->ApicId].enabled,
+ ("Duplicate local APIC ID %u", x2apic->ApicId));
+ cpus[x2apic->ApicId].domain = x2apic->ProximityDomain;
+ cpus[x2apic->ApicId].enabled = 1;
+ break;
+ case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
+ mem = (ACPI_SRAT_MEM_AFFINITY *)entry;
+ if (bootverbose)
+ printf(
+ "SRAT: Found memory domain %d addr %jx len %jx: %s\n",
+ mem->ProximityDomain, (uintmax_t)mem->BaseAddress,
+ (uintmax_t)mem->Length,
+ (mem->Flags & ACPI_SRAT_MEM_ENABLED) ?
+ "enabled" : "disabled");
+ if (!(mem->Flags & ACPI_SRAT_MEM_ENABLED))
+ break;
+ if (num_mem == VM_PHYSSEG_MAX) {
+ printf("SRAT: Too many memory regions\n");
+ *(int *)arg = ENXIO;
+ break;
+ }
+ slot = num_mem;
+ for (i = 0; i < num_mem; i++) {
+ if (mem_info[i].end <= mem->BaseAddress)
+ continue;
+ if (mem_info[i].start <
+ (mem->BaseAddress + mem->Length)) {
+ printf("SRAT: Overlapping memory entries\n");
+ *(int *)arg = ENXIO;
+ return;
+ }
+ slot = i;
+ }
+ for (i = num_mem; i > slot; i--)
+ mem_info[i] = mem_info[i - 1];
+ mem_info[slot].start = mem->BaseAddress;
+ mem_info[slot].end = mem->BaseAddress + mem->Length;
+ mem_info[slot].domain = mem->ProximityDomain;
+ num_mem++;
+ break;
+ }
+}
+
+/*
+ * Ensure each memory domain has at least one CPU and that each CPU
+ * has at least one memory domain.
+ */
+static int
+check_domains(void)
+{
+ int found, i, j;
+
+ for (i = 0; i < num_mem; i++) {
+ found = 0;
+ for (j = 0; j <= MAX_APIC_ID; j++)
+ if (cpus[j].domain == mem_info[i].domain) {
+ cpus[j].has_memory = 1;
+ found++;
+ }
+ if (!found) {
+ printf("SRAT: No CPU found for memory domain %d\n",
+ mem_info[i].domain);
+ return (ENXIO);
+ }
+ }
+ for (i = 0; i <= MAX_APIC_ID; i++)
+ if (cpus[i].enabled && !cpus[i].has_memory) {
+ printf("SRAT: No memory found for CPU %d\n", i);
+ return (ENXIO);
+ }
+ return (0);
+}
+
+/*
+ * Check that the SRAT memory regions cover all of the regions in
+ * phys_avail[].
+ */
+static int
+check_phys_avail(void)
+{
+ vm_paddr_t address;
+ int i, j;
+
+ /* j is the current offset into phys_avail[]. */
+ address = phys_avail[0];
+ j = 0;
+ for (i = 0; i < num_mem; i++) {
+ /*
+ * Consume as many phys_avail[] entries as fit in this
+ * region.
+ */
+ while (address >= mem_info[i].start &&
+ address <= mem_info[i].end) {
+ /*
+ * If we cover the rest of this phys_avail[] entry,
+ * advance to the next entry.
+ */
+ if (phys_avail[j + 1] <= mem_info[i].end) {
+ j += 2;
+ if (phys_avail[j] == 0 &&
+ phys_avail[j + 1] == 0) {
+ return (0);
+ }
+ address = phys_avail[j];
+ } else
+ address = mem_info[i].end + 1;
+ }
+ }
+ printf("SRAT: No memory region found for %jx - %jx\n",
+ (uintmax_t)phys_avail[j], (uintmax_t)phys_avail[j + 1]);
+ return (ENXIO);
+}
+
+/*
+ * Renumber the memory domains to be compact and zero-based if not
+ * already.
+ */
+static void
+renumber_domains(void)
+{
+ int domains[VM_PHYSSEG_MAX];
+ int ndomain, i, j, slot;
+
+ /* Enumerate all the domains. */
+ ndomain = 0;
+ for (i = 0; i < num_mem; i++) {
+ /* See if this domain is already known. */
+ for (j = 0; j < ndomain; j++) {
+ if (domains[j] >= mem_info[i].domain)
+ break;
+ }
+ if (j < ndomain && domains[j] == mem_info[i].domain)
+ continue;
+
+ /* Insert the new domain at slot 'j'. */
+ slot = j;
+ for (j = ndomain; j > slot; j--)
+ domains[j] = domains[j - 1];
+ domains[slot] = mem_info[i].domain;
+ }
+
+ /* Renumber each domain to its index in the sorted 'domains' list. */
+ for (i = 0; i < ndomain; i++) {
+ /*
+ * If the domain is already the right value, no need
+ * to renumber.
+ */
+ if (domains[i] == i)
+ continue;
+
+ /* Walk the cpu[] and mem_info[] arrays to renumber. */
+ for (j = 0; j < num_mem; j++)
+ if (mem_info[j].domain == domains[i])
+ mem_info[j].domain = i;
+ for (j = 0; j <= MAX_APIC_ID; j++)
+ if (cpus[j].enabled && cpus[j].domain == domains[i])
+ cpus[j].domain = i;
+ }
+}
+
+/*
+ * Look for an ACPI System Resource Affinity Table ("SRAT")
+ */
+static void
+parse_srat(void *dummy)
+{
+ int error;
+
+ if (resource_disabled("srat", 0))
+ return;
+
+ srat_physaddr = acpi_find_table(ACPI_SIG_SRAT);
+ if (srat_physaddr == 0)
+ return;
+
+ /*
+ * Make a pass over the table to populate the cpus[] and
+ * mem_info[] tables.
+ */
+ srat = acpi_map_table(srat_physaddr, ACPI_SIG_SRAT);
+ error = 0;
+ srat_walk_table(srat_parse_entry, &error);
+ acpi_unmap_table(srat);
+ srat = NULL;
+ if (error || check_domains() != 0 || check_phys_avail() != 0) {
+ srat_physaddr = 0;
+ return;
+ }
+
+ renumber_domains();
+
+ /* Point vm_phys at our memory affinity table. */
+ mem_affinity = mem_info;
+}
+SYSINIT(parse_srat, SI_SUB_VM - 1, SI_ORDER_FIRST, parse_srat, NULL);
+
+static void
+srat_walk_table(acpi_subtable_handler *handler, void *arg)
+{
+
+ acpi_walk_subtables(srat + 1, (char *)srat + srat->Header.Length,
+ handler, arg);
+}
+
+/*
+ * Setup per-CPU ACPI IDs.
+ */
+static void
+srat_set_cpus(void *dummy)
+{
+ struct cpu_info *cpu;
+ struct pcpu *pc;
+ u_int i;
+
+ if (srat_physaddr == 0)
+ return;
+ for (i = 0; i < MAXCPU; i++) {
+ if (CPU_ABSENT(i))
+ continue;
+ pc = pcpu_find(i);
+ KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
+ cpu = &cpus[pc->pc_apic_id];
+ if (!cpu->enabled)
+ panic("SRAT: CPU with APIC ID %u is not known",
+ pc->pc_apic_id);
+ pc->pc_domain = cpu->domain;
+ if (bootverbose)
+ printf("SRAT: CPU %u has memory domain %d\n", i,
+ cpu->domain);
+ }
+}
+SYSINIT(srat_set_cpus, SI_SUB_CPU, SI_ORDER_ANY, srat_set_cpus, NULL);
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