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xen/irq: Add support to check if IRQ line is shared with other domains.

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We do this via the PHYSDEVOP_irq_status_query support hypervisor call.
We will get a positive value if another domain has binded its
PIRQ to the specified GSI (IRQ line).

[v2: Deal with v2.6.37-rc1 rebase fallout]
[v3: Deal with stable/irq.cleanup fallout]
[v4: xen_ignore_irq->xen_test_irq_shared]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2010-11-08 14:26:36 -05:00
parent beafbdc1df
commit c7c2c3a286
2 changed files with 15 additions and 0 deletions
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3
include/xen/events.h
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@ -95,4 +95,7 @@ int xen_destroy_irq(int irq);
/* Return irq from pirq */
int xen_irq_from_pirq(unsigned pirq);
/* Determine whether to ignore this IRQ if it is passed to a guest. */
int xen_test_irq_shared(int irq);
#endif /* _XEN_EVENTS_H */