From: Andrii Tseglytskyi <andrii.tseglyts...@globallogic.com>
Patch allows reassigning of hardware interrupts from dom0 to
other guest domain.
Signed-off-by: Andrii Tseglytskyi <andrii.tseglyts...@globallogic.com>
Signed-off-by: Iurii Konovalenko <iurii.konovale...@globallogic.com>
---
xen/arch/arm/irq.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index 1f38605..c470613 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -481,12 +481,23 @@ int route_irq_to_guest(struct domain *d, unsigned int
virq,
}
if ( test_bit(_IRQ_GUEST, &desc->status) )
- printk(XENLOG_G_ERR "IRQ %u is already used by domain %u\n",
- irq, ad->domain_id);
+ {
+ printk(XENLOG_G_DEBUG "IRQ %u is reassigned from domain %u to
domain %u\n",
+ irq, ad->domain_id, d->domain_id);
+
+ retval = gic_remove_irq_from_guest(ad, irq, desc);
+ if ( retval )
+ printk(XENLOG_G_ERR "failed to remove IRQ %u from domain %u
(%d)\n",
+ irq, ad->domain_id, retval);
+ xfree(desc->action);
+ desc->action = NULL;
+ }
else
+ {
printk(XENLOG_G_ERR "IRQ %u is already used by Xen\n", irq);
- retval = -EBUSY;
- goto out;
+ retval = -EBUSY;
+ goto out;
+ }
}
retval = __setup_irq(desc, 0, action);
--
2.8.2
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