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spapr-pci: enable irqfd for INTx 

This enables IRQFD for LSI (level triggered INTx interrupts) by adding
a spapr_route_intx_pin_to_irq() callback to the sPAPR PCI host bus. This
callback is called to know the global interrupt number to link resampling fd
with IRQFD's fd in KVM.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexey Kardashevskiy 2013-09-26 16:18:48 +10:00 committed by Alexander Graf
parent 9554233c9b
commit 5cc7a967e9
1 changed files with 13 additions and 0 deletions
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13
hw/ppc/spapr_pci.c
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@ -432,6 +432,17 @@ static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
}
static PCIINTxRoute spapr_route_intx_pin_to_irq(void *opaque, int pin)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(opaque);
PCIINTxRoute route;
route.mode = PCI_INTX_ENABLED;
route.irq = sphb->lsi_table[pin].irq;
return route;
}
/*
* MSI/MSIX memory region implementation.
* The handler handles both MSI and MSIX.
@ -610,6 +621,8 @@ static int spapr_phb_init(SysBusDevice *s)
pci_setup_iommu(bus, spapr_pci_dma_iommu, sphb);
pci_bus_set_route_irq_fn(bus, spapr_route_intx_pin_to_irq);
QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
/* Initialize the LSI table */