tree fc2a2c0652a61d9b0f582c33cfa4c75b3bd8a654
parent beafbdc1df02877612dc9039c1de0639921fddec
author Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1289244396 -0500
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1302794274 -0400

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

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>