diff options
| author | Ingo Molnar <mingo@elte.hu> | 2007-05-02 19:27:04 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:04 +0200 |
| commit | 3c43f03908de98fa8f7a9e8fc9411ebf4c2de298 (patch) | |
| tree | 3e2c78fc91f29dfdfd29970e70982f0386863d17 /arch/x86_64 | |
| parent | 424df390101f9dfe015f0633aaec696c159b37a8 (diff) | |
| download | blackbird-op-linux-3c43f03908de98fa8f7a9e8fc9411ebf4c2de298.tar.gz blackbird-op-linux-3c43f03908de98fa8f7a9e8fc9411ebf4c2de298.zip | |
[PATCH] x86: default to physical mode on hotplug CPU kernels
Default to physical mode on hotplug CPU kernels. Furher simplify and clean up
the APIC initialization code.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/genapic.c | 16 | ||||
| -rw-r--r-- | arch/x86_64/kernel/mpparse.c | 2 |
2 files changed, 4 insertions, 14 deletions
diff --git a/arch/x86_64/kernel/genapic.c b/arch/x86_64/kernel/genapic.c index 025f26ebb8d7..c08650a427e2 100644 --- a/arch/x86_64/kernel/genapic.c +++ b/arch/x86_64/kernel/genapic.c @@ -35,11 +35,8 @@ struct genapic __read_mostly *genapic = &apic_flat; /* * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. */ -void __init clustered_apic_check(void) +void __init setup_apic_routing(void) { - unsigned int i, max_apic = 0; - u8 id; - #ifdef CONFIG_ACPI /* * Quirk: some x86_64 machines can only use physical APIC mode @@ -49,17 +46,10 @@ void __init clustered_apic_check(void) if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID && (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) genapic = &apic_physflat; + else #endif - for (i = 0; i < NR_CPUS; i++) { - id = bios_cpu_apicid[i]; - if (id == BAD_APICID) - continue; - if (id > max_apic) - max_apic = id; - } - - if (max_apic < 8) + if (cpus_weight(cpu_possible_map) <= 8) genapic = &apic_flat; else genapic = &apic_physflat; diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c index 455aa0b932f0..d0dc4891599b 100644 --- a/arch/x86_64/kernel/mpparse.c +++ b/arch/x86_64/kernel/mpparse.c @@ -300,7 +300,7 @@ static int __init smp_read_mpc(struct mp_config_table *mpc) } } } - clustered_apic_check(); + setup_apic_routing(); if (!num_processors) printk(KERN_ERR "MPTABLE: no processors registered!\n"); return num_processors; |
