diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-10 11:16:45 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-12 08:44:55 +0200 |
| commit | 72b1e22dfcad1daca6906148fd956ffe404bb0bc (patch) | |
| tree | 9ca9c198c7bd592528c322002bada84bc3e9d84d | |
| parent | b6fcb33ad6c05f152a672f7c96c1fab006527b80 (diff) | |
x64, x2apic/intr-remap: generic irq migration support from process context
Generic infrastructure for migrating the irq from the process context in the
presence of CONFIG_GENERIC_PENDING_IRQ.
This will be used later for migrating irq in the presence of
interrupt-remapping.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/irq.h | 1 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 9 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index 552e0ec269c..c211984b55e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -62,6 +62,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ +#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #ifdef CONFIG_IRQ_PER_CPU # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 46d6611a33b..628b5572a7c 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -87,7 +87,14 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask) set_balance_irq_affinity(irq, cpumask); #ifdef CONFIG_GENERIC_PENDING_IRQ - set_pending_irq(irq, cpumask); + if (desc->status & IRQ_MOVE_PCNTXT) { + unsigned long flags; + + spin_lock_irqsave(&desc->lock, flags); + desc->chip->set_affinity(irq, cpumask); + spin_unlock_irqrestore(&desc->lock, flags); + } else + set_pending_irq(irq, cpumask); #else desc->affinity = cpumask; desc->chip->set_affinity(irq, cpumask); |