This patch uses IRQ injection mechanism introduced by virt_queue__trigger_irq() which respect virtio IRQ status and VRING_AVAIL_F_NO_INTERRUPT.
Signed-off-by: Asias He <[email protected]> --- tools/kvm/virtio/rng.c | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/kvm/virtio/rng.c b/tools/kvm/virtio/rng.c index d355cf8..f692dfd 100644 --- a/tools/kvm/virtio/rng.c +++ b/tools/kvm/virtio/rng.c @@ -37,6 +37,7 @@ static struct pci_device_header virtio_rng_pci_device = { struct rng_dev { u8 status; + u8 isr; u16 config_vector; int fd; @@ -72,8 +73,9 @@ static bool virtio_rng_pci_io_in(struct kvm *kvm, u16 port, void *data, int size ioport__write8(data, rdev.status); break; case VIRTIO_PCI_ISR: - ioport__write8(data, 0x1); - kvm__irq_line(kvm, virtio_rng_pci_device.irq_line, 0); + ioport__write8(data, rdev.isr); + kvm__irq_line(kvm, virtio_rng_pci_device.irq_line, VIRTIO_IRQ_LOW); + rdev.isr = VIRTIO_IRQ_LOW; break; case VIRTIO_MSI_CONFIG_VECTOR: ioport__write16(data, rdev.config_vector); @@ -106,7 +108,7 @@ static void virtio_rng_do_io(struct kvm *kvm, void *param) while (virt_queue__available(vq)) { virtio_rng_do_io_request(kvm, vq); - kvm__irq_line(kvm, virtio_rng_pci_device.irq_line, 1); + virt_queue__trigger_irq(vq, virtio_rng_pci_device.irq_line, &rdev.isr, kvm); } } -- 1.7.5.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
