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genirq: Introduce IRQD_AFFINITY_MANAGED flag

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Interupts marked with this flag are excluded from user space interrupt
affinity changes. Contrary to the IRQ_NO_BALANCING flag, the kernel internal
affinity mechanism is not blocked.

This flag will be used for multi-queue device interrupts.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-3-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-07-04 17:39:23 +09:00
parent b6140914fd
commit 9c2555835b
4 changed files with 28 additions and 4 deletions
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7
include/linux/irq.h
View file

@ -197,6 +197,7 @@ struct irq_data {
* IRQD_IRQ_INPROGRESS - In progress state of the interrupt
* IRQD_WAKEUP_ARMED - Wakeup mode armed
* IRQD_FORWARDED_TO_VCPU - The interrupt is forwarded to a VCPU
* IRQD_AFFINITY_MANAGED - Affinity is auto-managed by the kernel
*/
enum {
IRQD_TRIGGER_MASK = 0xf,
@ -212,6 +213,7 @@ enum {
IRQD_IRQ_INPROGRESS = (1 << 18),
IRQD_WAKEUP_ARMED = (1 << 19),
IRQD_FORWARDED_TO_VCPU = (1 << 20),
IRQD_AFFINITY_MANAGED = (1 << 21),
};
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
@ -305,6 +307,11 @@ static inline void irqd_clr_forwarded_to_vcpu(struct irq_data *d)
__irqd_to_state(d) &= ~IRQD_FORWARDED_TO_VCPU;
}
static inline bool irqd_affinity_is_managed(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_AFFINITY_MANAGED;
}
#undef __irqd_to_state
static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)