From 168df2dea701bbf3118bdfea7794369dfa694d3d Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Tue, 31 Oct 2017 11:50:52 +0000 Subject: hw/pci-host/gpex: Improve INTX to gsi routing error checking We exposed gpex_set_irq_num() for machines to set the INTx to GSI routing. However if the machine forgets to call that function we currently do not check the association was properly done. Let's initialize gsi values to -1 and if this value is found in gpex_route_intx_pin_to_irq, set the routing mode as disabled. Signed-off-by: Eric Auger Message-id: 1508776211-22175-1-git-send-email-eric.auger@redhat.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/pci-host/gpex.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/hw/pci-host/gpex.c b/hw/pci-host/gpex.c index 4090793cf0..edf305b1fd 100644 --- a/hw/pci-host/gpex.c +++ b/hw/pci-host/gpex.c @@ -57,9 +57,14 @@ static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin) { PCIINTxRoute route; GPEXHost *s = opaque; + int gsi = s->irq_num[pin]; - route.mode = PCI_INTX_ENABLED; - route.irq = s->irq_num[pin]; + route.irq = gsi; + if (gsi < 0) { + route.mode = PCI_INTX_DISABLED; + } else { + route.mode = PCI_INTX_ENABLED; + } return route; } @@ -81,6 +86,7 @@ static void gpex_host_realize(DeviceState *dev, Error **errp) sysbus_init_mmio(sbd, &s->io_ioport); for (i = 0; i < GPEX_NUM_IRQS; i++) { sysbus_init_irq(sbd, &s->irq[i]); + s->irq_num[i] = -1; } pci->bus = pci_register_bus(dev, "pcie.0", gpex_set_irq, -- cgit v1.2.1