diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2013-12-06 11:16:29 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2013-12-06 11:16:29 -0700 |
| commit | b3ebc10c373ed5922d4bdb5076fd0e9fd7ff8056 (patch) | |
| tree | 7c7f285305b56197cf720724b6253347d26b0f22 /hw/misc | |
| parent | 96eeeba0db38b856eb2cae0e4a2a620d8d65771a (diff) | |
vfio-pci: Add debug config options to disable MSI/X KVM support
It's sometimes useful to be able to verify interrupts are passing
through correctly.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'hw/misc')
| -rw-r--r-- | hw/misc/vfio.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c index 09bdddf18a..f367537737 100644 --- a/hw/misc/vfio.c +++ b/hw/misc/vfio.c @@ -52,6 +52,8 @@ /* Extra debugging, trap acceleration paths for more logging */ #define VFIO_ALLOW_MMAP 1 #define VFIO_ALLOW_KVM_INTX 1 +#define VFIO_ALLOW_KVM_MSI 1 +#define VFIO_ALLOW_KVM_MSIX 1 struct VFIODevice; @@ -590,9 +592,21 @@ static void vfio_msi_interrupt(void *opaque) return; } - DPRINTF("%s(%04x:%02x:%02x.%x) vector %d\n", __func__, +#ifdef VFIO_DEBUG + MSIMessage msg; + + if (vdev->interrupt == VFIO_INT_MSIX) { + msg = msi_get_message(&vdev->pdev, nr); + } else if (vdev->interrupt == VFIO_INT_MSI) { + msg = msix_get_message(&vdev->pdev, nr); + } else { + abort(); + } + + DPRINTF("%s(%04x:%02x:%02x.%x) vector %d 0x%"PRIx64"/0x%x\n", __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot, - vdev->host.function, nr); + vdev->host.function, nr, msg.address, msg.data); +#endif if (vdev->interrupt == VFIO_INT_MSIX) { msix_notify(&vdev->pdev, nr); @@ -660,7 +674,8 @@ static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr, * Attempt to enable route through KVM irqchip, * default to userspace handling if unavailable. */ - vector->virq = msg ? kvm_irqchip_add_msi_route(kvm_state, *msg) : -1; + vector->virq = msg && VFIO_ALLOW_KVM_MSIX ? + kvm_irqchip_add_msi_route(kvm_state, *msg) : -1; if (vector->virq < 0 || kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, NULL, vector->virq) < 0) { @@ -827,7 +842,8 @@ retry: * Attempt to enable route through KVM irqchip, * default to userspace handling if unavailable. */ - vector->virq = kvm_irqchip_add_msi_route(kvm_state, vector->msg); + vector->virq = VFIO_ALLOW_KVM_MSI ? + kvm_irqchip_add_msi_route(kvm_state, vector->msg) : -1; if (vector->virq < 0 || kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, NULL, vector->virq) < 0) { |