[PATCH v2 1/4] kvm tools: Use virt_queue__trigger_irq() to trigger IRQ for virtio console

[Asias He]

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 <asias.he...@gmail.com>
---
 tools/kvm/virtio/console.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/kvm/virtio/console.c b/tools/kvm/virtio/console.c
index 188227b..f5449ba 100644
--- a/tools/kvm/virtio/console.c
+++ b/tools/kvm/virtio/console.c
@@ -49,6 +49,7 @@ struct con_dev {
        u32                             guest_features;
        u16                             config_vector;
        u8                              status;
+       u8                              isr;
        u16                             queue_selector;
 
        void                            *jobs[VIRTIO_CONSOLE_NUM_QUEUES];
@@ -85,7 +86,7 @@ static void virtio_console__inject_interrupt_callback(struct 
kvm *self, void *pa
                head = virt_queue__get_iov(vq, iov, &out, &in, self);
                len = term_getc_iov(CONSOLE_VIRTIO, iov, in);
                virt_queue__set_used_elem(vq, head, len);
-               kvm__irq_line(self, virtio_console_pci_device.irq_line, 1);
+               virt_queue__trigger_irq(vq, virtio_console_pci_device.irq_line, 
&cdev.isr, self);
        }
 
        mutex_unlock(&cdev.mutex);
@@ -139,8 +140,9 @@ static bool virtio_console_pci_io_in(struct kvm *self, u16 
port, void *data, int
                ioport__write8(data, cdev.status);
                break;
        case VIRTIO_PCI_ISR:
-               ioport__write8(data, 0x1);
-               kvm__irq_line(self, virtio_console_pci_device.irq_line, 0);
+               ioport__write8(data, cdev.isr);
+               kvm__irq_line(self, virtio_console_pci_device.irq_line, 
VIRTIO_IRQ_LOW);
+               cdev.isr = VIRTIO_IRQ_LOW;
                break;
        case VIRTIO_MSI_CONFIG_VECTOR:
                ioport__write16(data, cdev.config_vector);
@@ -170,7 +172,7 @@ static void virtio_console_handle_callback(struct kvm 
*self, void *param)
                virt_queue__set_used_elem(vq, head, len);
        }
 
-       kvm__irq_line(self, virtio_console_pci_device.irq_line, 1);
+       virt_queue__trigger_irq(vq, virtio_console_pci_device.irq_line, 
&cdev.isr, self);
 }
 
 static bool virtio_console_pci_io_out(struct kvm *self, u16 port, void *data, 
int size, u32 count)
-- 
1.7.5.1

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