From: Yinghai Lu Date: Wed, 30 Jan 2008 12:30:39 +0000 (+0100) Subject: x86: clear IO_APIC before enabing apic error vector. X-Git-Tag: v2.6.25-rc1~1143^2~751 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=1c69524c2e5b83e52a098ebdeb4a8b52169f6a03;p=linux-2.6-omap-h63xx.git x86: clear IO_APIC before enabing apic error vector. 4 socket quad core, 8 socket quad core will do apic ID lifting for BSP. But io-apic regs for ExtINT still use 0 as dest. so when we enable apic error vector in BSP, we will get one APIC error. CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) CPU: L2 Cache: 512K (64 bytes/line) CPU 0/4 -> Node 0 CPU: Physical Processor ID: 1 CPU: Processor Core ID: 0 SMP alternatives: switching to UP code ACPI: Core revision 20070126 enabled ExtINT on CPU#0 ESR value after enabling vector: 00000000, after 0000000c APIC error on CPU0: 0c(08) ENABLING IO-APIC IRQs Synchronizing Arb IDs. So move enable_IO_APIC from setup_IO_APIC into setup_local_APIC and call it before enabling the ACPI error vector. [ tglx: arch/x86 adaptation ] Signed-off-by: Yinghai Lu Signed-off-by: Andi Kleen Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index 915808bd8a2..994298bf492 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -774,6 +774,13 @@ void __cpuinit setup_local_APIC(void) value = APIC_DM_NMI | APIC_LVT_MASKED; apic_write(APIC_LVT1, value); + /* + * Now enable IO-APICs, actually call clear_IO_APIC + * We need clear_IO_APIC before enabling vector on BP + */ + if (!smp_processor_id() && !skip_ioapic_setup && nr_ioapics) + enable_IO_APIC(); + { unsigned oldvalue; maxlvt = lapic_get_maxlvt(); diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c index 3e471d0fb15..4ef85a3b3f9 100644 --- a/arch/x86/kernel/io_apic_64.c +++ b/arch/x86/kernel/io_apic_64.c @@ -1172,7 +1172,7 @@ void __apicdebuginit print_PIC(void) #endif /* 0 */ -static void __init enable_IO_APIC(void) +void __init enable_IO_APIC(void) { union IO_APIC_reg_01 reg_01; int i8259_apic, i8259_pin; @@ -1789,7 +1789,10 @@ __setup("no_timer_check", notimercheck); void __init setup_IO_APIC(void) { - enable_IO_APIC(); + + /* + * calling enable_IO_APIC() is moved to setup_local_APIC for BP + */ if (acpi_ioapic) io_apic_irqs = ~0; /* all IRQs go through IOAPIC */ diff --git a/include/asm-x86/hw_irq_64.h b/include/asm-x86/hw_irq_64.h index a470d59da67..a346159b6ac 100644 --- a/include/asm-x86/hw_irq_64.h +++ b/include/asm-x86/hw_irq_64.h @@ -135,6 +135,7 @@ extern void init_8259A(int aeoi); extern void send_IPI_self(int vector); extern void init_VISWS_APIC_irqs(void); extern void setup_IO_APIC(void); +extern void enable_IO_APIC(void); extern void disable_IO_APIC(void); extern void print_IO_APIC(void); extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);