From 702b07fcc9b264c9afd372676bbdd50a762dcde0 Mon Sep 17 00:00:00 2001 From: Lukasz Anaczkowski Date: Thu, 21 Apr 2016 11:29:00 +0200 Subject: [PATCH] ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present SRAT maps APIC ID to proximity domains ids (PXM). Mapping from PXM to NUMA node ids is based on order of entries in SRAT table. SRAT table has just LAPIC entires or mix of LAPIC and X2APIC entries. As long as there are only LAPIC entires, mapping from proximity domain id to NUMA node id is as assumed by BIOS. However, once APIC entries are mixed, X2APIC entries would be first mapped which causes unexpected NUMA node mapping. To fix that, change parsing to check each entry against both LAPIC and X2APIC so mapping is in the SRAT/PXM order. This is supplemental change to the fix made by commit d81056b5278 (Handle apic/x2apic entries in MADT in correct order) and using the mechanism introduced by 9b3fedd (ACPI / tables: Add acpi_subtable_proc to ACPI table parsers). Fixes: d81056b5278 (Handle apic/x2apic entries in MADT in correct order) Signed-off-by: Lukasz Anaczkowski [ rjw : Subject & changelog ] Signed-off-by: Rafael J. Wysocki --- drivers/acpi/numa.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index 72b6e9ef0ae9..d176e0ece470 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -327,10 +327,18 @@ int __init acpi_numa_init(void) /* SRAT: Static Resource Affinity Table */ if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { - acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY, - acpi_parse_x2apic_affinity, 0); - acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, - acpi_parse_processor_affinity, 0); + struct acpi_subtable_proc srat_proc[2]; + + memset(srat_proc, 0, sizeof(srat_proc)); + srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY; + srat_proc[0].handler = acpi_parse_processor_affinity; + srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY; + srat_proc[1].handler = acpi_parse_x2apic_affinity; + + acpi_table_parse_entries_array(ACPI_SIG_SRAT, + sizeof(struct acpi_table_srat), + srat_proc, ARRAY_SIZE(srat_proc), 0); + cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); -- 2.34.1