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| author |   Siddha, Suresh B <suresh.b.siddha@intel.com> | 2006-12-07 02:14:10 +0100 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:10 +0100 |
| commit | b0d0a4ba45760b10ecee9035ed45b442c1a6cc84 (patch) | |
| tree | 9fbdab9d6cc010b415d38ffccc89ccf03398a89c /arch/x86_64/kernel/smpboot.c | |
| parent | [PATCH] x86-64: add genapic_force (diff) | |
| download | linux-dev-b0d0a4ba45760b10ecee9035ed45b442c1a6cc84.tar.xz linux-dev-b0d0a4ba45760b10ecee9035ed45b442c1a6cc84.zip | |
[PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525
Move the irqbalance quirks for E7320/E7520/E7525(Errata 23 in
http://download.intel.com/design/chipsets/specupdt/30304203.pdf) to early
quirks.
And add a PCI quirk for these platforms to check(which happens very late
during the boot) if the APIC routing is indeed set to default flat mode.
This fixes the breakage(in x86_64) of this quirk due to cpu hotplug which
selects physical mode instead of the logical flat(as needed for this errata
workaround).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/smpboot.c')
| -rw-r--r-- | arch/x86_64/kernel/smpboot.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c index 62c2e747af58..4c161c208d5b 100644 --- a/arch/x86_64/kernel/smpboot.c +++ b/arch/x86_64/kernel/smpboot.c @@ -60,6 +60,7 @@ #include <asm/irq.h> #include <asm/hw_irq.h> #include <asm/numa.h> +#include <asm/genapic.h> /* Number of siblings per CPU package */ int smp_num_siblings = 1; @@ -1167,6 +1168,13 @@ int __cpuinit __cpu_up(unsigned int cpu) while (!cpu_isset(cpu, cpu_online_map)) cpu_relax(); + + if (num_online_cpus() > 8 && genapic == &apic_flat) { + printk(KERN_WARNING + "flat APIC routing can't be used with > 8 cpus\n"); + BUG(); + } + err = 0; return err; |