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kvm tools: Use virt_queue__trigger_irq() to trigger IRQ for virtio blk

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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.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Asias He
2015-06-01 16:39:43 +01:00
committed by Will Deacon
parent 0ba84a57a0
commit ebfc732738
1 changed files with 5 additions and 3 deletions
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virtio/blk.c
+5 -3
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@@ -38,6 +38,7 @@ struct blk_dev {
u32 guest_features;
u16 config_vector;
u8 status;
u8 isr;
u8 idx;
/* virtio queue */
@@ -102,8 +103,9 @@ static bool virtio_blk_pci_io_in(struct kvm *self, u16 port, void *data, int siz
ioport__write8(data, bdev->status);
break;
case VIRTIO_PCI_ISR:
ioport__write8(data, 0x1);
kvm__irq_line(self, bdev->pci_hdr.irq_line, 0);
ioport__write8(data, bdev->isr);
kvm__irq_line(self, bdev->pci_hdr.irq_line, VIRTIO_IRQ_LOW);
bdev->isr = VIRTIO_IRQ_LOW;
break;
case VIRTIO_MSI_CONFIG_VECTOR:
ioport__write16(data, bdev->config_vector);
@@ -167,7 +169,7 @@ static void virtio_blk_do_io(struct kvm *kvm, void *param)
while (virt_queue__available(vq))
virtio_blk_do_io_request(kvm, bdev, vq);
kvm__irq_line(kvm, bdev->pci_hdr.irq_line, 1);
virt_queue__trigger_irq(vq, bdev->pci_hdr.irq_line, &bdev->isr, kvm);
}
static bool virtio_blk_pci_io_out(struct kvm *self, u16 port, void *data, int size, u32 count)