diff options
| author | Wanpeng Li <[email protected]> | 2016-08-23 20:07:19 +0800 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2016-08-24 09:45:40 +0200 |
| commit | 2e63ad4bd5dd583871e6602f9d398b9322d358d9 (patch) | |
| tree | 744e9bc09310b68f0204c1a6bd8714f336b7b615 | |
| parent | fa8410b355251fd30341662a40ac6b22d3e38468 (diff) | |
x86/apic: Do not init irq remapping if ioapic is disabled
native_smp_prepare_cpus
-> default_setup_apic_routing
-> enable_IR_x2apic
-> irq_remapping_prepare
-> intel_prepare_irq_remapping
-> intel_setup_irq_remapping
So IR table is setup even if "noapic" boot parameter is added. As a result we
crash later when the interrupt affinity is set due to a half initialized
remapping infrastructure.
Prevent remap initialization when IOAPIC is disabled.
Signed-off-by: Wanpeng Li <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Joerg Roedel <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Cc: [email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index cea4fc19e844..50c95af0f017 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1623,6 +1623,9 @@ void __init enable_IR_x2apic(void) unsigned long flags; int ret, ir_stat; + if (skip_ioapic_setup) + return; + ir_stat = irq_remapping_prepare(); if (ir_stat < 0 && !x2apic_supported()) return; |