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Interrupt handling in Xen 3.5 changed. There's no longer 

a hardcoded upper limit. So *our* upper limit of 200 may be different from machine to machine now.
So just retry if the hypercall failed.
This commit is contained in:
cegger 2009-06-03 12:43:22 +00:00
parent 677e91afbc
commit 84dc7c540d
1 changed files with 11 additions and 3 deletions
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14
sys/arch/xen/x86/intr.c
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@ -103,7 +103,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.23 2009/04/22 21:16:40 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.24 2009/06/03 12:43:22 cegger Exp $");
#include "opt_multiprocessor.h"
#include "opt_xen.h"
@ -257,6 +257,9 @@ xen_intr_map(int *pirq, int type)
* of the next device if this one used this IRQ. The easiest is
* to allocate IRQs top-down, starting with a high number.
* 250 and 230 have been tried, but got rejected by Xen.
*
* Xen 3.5 also rejects 200. Try out all values until Xen accepts
* or none is available.
*/
static int xen_next_irq = 200;
struct ioapic_softc *ioapic = ioapic_find(APIC_IRQ_APIC(*pirq));
@ -271,11 +274,16 @@ xen_intr_map(int *pirq, int type)
irq = APIC_IRQ_LEGACY_IRQ(*pirq);
if (irq <= 0 || irq > 15)
irq = xen_next_irq--;
retry:
/* allocate vector and route interrupt */
op.cmd = PHYSDEVOP_ASSIGN_VECTOR;
op.u.irq_op.irq = irq;
if (HYPERVISOR_physdev_op(&op) < 0)
panic("PHYSDEVOP_ASSIGN_VECTOR irq %d", irq);
if (HYPERVISOR_physdev_op(&op) < 0) {
irq = xen_next_irq--;
if (xen_next_irq == 15)
panic("PHYSDEVOP_ASSIGN_VECTOR irq %d", irq);
goto retry;
}
irq2vect[irq] = op.u.irq_op.vector;
vect2irq[op.u.irq_op.vector] = irq;
pic->pic_addroute(pic, &phycpu_info_primary, pin,