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xen: map MSIs into pirqs

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Map MSIs into pirqs, writing 0 in the MSI vector data field and the pirq
number in the MSI destination id field.

Signed-off-by: Stefano Stabellini <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
This commit is contained in:
Stefano Stabellini 2010-07-01 17:10:39 +01:00
commit 809f9267bb
3 changed files with 81 additions and 0 deletions
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22
drivers/xen/events.c
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@ -656,6 +656,28 @@ out:
return irq;
}
void xen_allocate_pirq_msi(char *name, int *irq, int *pirq)
{
spin_lock(&irq_mapping_update_lock);
*irq = find_unbound_irq();
if (*irq == -1)
goto out;
*pirq = find_unbound_pirq();
if (*pirq == -1)
goto out;
set_irq_chip_and_handler_name(*irq, &xen_pirq_chip,
handle_level_irq, name);
irq_info[*irq] = mk_pirq_info(0, *pirq, 0, 0);
pirq_to_irq[*pirq] = *irq;
out:
spin_unlock(&irq_mapping_update_lock);
}
int xen_destroy_irq(int irq)
{
struct irq_desc *desc;