diff options
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-12-01 14:51:44 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-12-02 14:40:50 +0000 |
| commit | 9a069c33c53c2e72ec1b76106be73df044af0195 (patch) | |
| tree | 765e44e4425da42f988e1fcf07e9b85cce708e40 | |
| parent | 6411fe69b8c4fd7811339c88c1843d562099fa2b (diff) | |
| download | linux-9a069c33c53c2e72ec1b76106be73df044af0195.tar.bz2 | |
xen: fix save/restore for PV on HVM guests with pirq remapping
Re-map and re-bind all the pirqs at resume time.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| -rw-r--r-- | drivers/xen/events.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index f78945ce8aeb..f34288a5400c 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -1293,6 +1293,42 @@ static int retrigger_dynirq(unsigned int irq) return ret; } +static void restore_cpu_pirqs(void) +{ + int pirq, rc, irq, gsi; + struct physdev_map_pirq map_irq; + + for (pirq = 0; pirq < nr_irqs; pirq++) { + irq = pirq_to_irq[pirq]; + if (irq == -1) + continue; + + /* save/restore of PT devices doesn't work, so at this point the + * only devices present are GSI based emulated devices */ + gsi = gsi_from_irq(irq); + if (!gsi) + continue; + + map_irq.domid = DOMID_SELF; + map_irq.type = MAP_PIRQ_TYPE_GSI; + map_irq.index = gsi; + map_irq.pirq = pirq; + + rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); + if (rc) { + printk(KERN_WARNING "xen map irq failed gsi=%d irq=%d pirq=%d rc=%d\n", + gsi, irq, pirq, rc); + irq_info[irq] = mk_unbound_info(); + pirq_to_irq[pirq] = -1; + continue; + } + + printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq); + + startup_pirq(irq); + } +} + static void restore_cpu_virqs(unsigned int cpu) { struct evtchn_bind_virq bind_virq; @@ -1436,6 +1472,8 @@ void xen_irq_resume(void) unmask_evtchn(evtchn); } + + restore_cpu_pirqs(); } static struct irq_chip xen_dynamic_chip __read_mostly = { |