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| author | Yinghai Lu <yinghai@kernel.org> | 2011-12-21 17:45:16 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-12-23 11:00:50 -0800 |
| commit | a35fd28256e7736cc84af8931a16224f0bfaaf6c (patch) | |
| tree | 637b536f651b756ce3a83478ef5a42c15b67709f /arch/x86/mm/srat.c | |
| parent | e8524b2f43ab6747518aef81c709d104c478b1cd (diff) | |
| download | linux-a35fd28256e7736cc84af8931a16224f0bfaaf6c.tar.gz linux-a35fd28256e7736cc84af8931a16224f0bfaaf6c.tar.bz2 linux-a35fd28256e7736cc84af8931a16224f0bfaaf6c.zip | |
x86, acpi: Skip acpi x2apic entries if the x2apic feature is not present
If the x2apic feature is not present (either the cpu is not capable of it
or the user has disabled the feature using boot-parameter etc), ignore the
x2apic MADT and SRAT entries provided by the ACPI tables.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20111222014632.540896503@sbsiddha-desk.sc.intel.com
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/srat.c')
| -rw-r--r-- | arch/x86/mm/srat.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c index 81dbfdeb080d..fd61b3fb7341 100644 --- a/arch/x86/mm/srat.c +++ b/arch/x86/mm/srat.c @@ -69,6 +69,12 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) return; pxm = pa->proximity_domain; + apic_id = pa->apic_id; + if (!cpu_has_x2apic && (apic_id >= 0xff)) { + printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n", + pxm, apic_id); + return; + } node = setup_node(pxm); if (node < 0) { printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); @@ -76,7 +82,6 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) return; } - apic_id = pa->apic_id; if (apic_id >= MAX_LOCAL_APIC) { printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); return; |