Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
virt/kvm/kvm_main.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 68 insertions(+), 6 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index be0f943..0f851ef 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -149,9 +149,15 @@ static void kvm_assigned_dev_interrupt_work_handler(struct
work_struct *work)
* finer-grained lock, update this
*/
mutex_lock(&assigned_dev->kvm->lock);
- kvm_set_irq(assigned_dev->kvm,
- assigned_dev->irq_source_id,
- assigned_dev->guest_irq, 1);
+ if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_INTX)
+ kvm_set_irq(assigned_dev->kvm,
+ assigned_dev->irq_source_id,
+ assigned_dev->guest_irq, 1);
+ else if (assigned_dev->irq_requested_type &
+ KVM_ASSIGNED_DEV_GUEST_MSI) {
+ assigned_device_msi_dispatch(assigned_dev);
+ enable_irq(assigned_dev->host_irq);
+ }
mutex_unlock(&assigned_dev->kvm->lock);
kvm_put_kvm(assigned_dev->kvm);
}
@@ -187,6 +193,8 @@ static void kvm_free_assigned_device(struct kvm *kvm,
{
if (irqchip_in_kernel(kvm) && assigned_dev->irq_requested_type)
free_irq(assigned_dev->host_irq, (void *)assigned_dev);
+ if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
+ pci_disable_msi(assigned_dev->dev);
kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
@@ -232,6 +240,11 @@ static int assigned_device_update_intx(struct kvm *kvm,
return 0;
if (irqchip_in_kernel(kvm)) {
+ if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) {
+ free_irq(adev->host_irq, (void *)kvm);
+ pci_disable_msi(adev->dev);
+ }
+
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
@@ -255,6 +268,38 @@ static int assigned_device_update_intx(struct kvm *kvm,
return 0;
}
+static int assigned_device_update_msi(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *adev,
+ struct kvm_assigned_irq *airq)
+{
+ int r;
+
+ adev->guest_msi_addr = airq->guest_msi_addr;
+ adev->guest_msi_data = airq->guest_msi_data;
+ adev->ack_notifier.gsi = -1;
+
+ if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
+ return 0;
+
+ if (irqchip_in_kernel(kvm)) {
+ if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_INTX)
+ free_irq(adev->host_irq, (void *)adev);
+
+ r = pci_enable_msi(adev->dev);
+ if (r)
+ return r;
+
+ adev->host_irq = adev->dev->irq;
+ if (request_irq(adev->host_irq, kvm_assigned_dev_intr, 0,
+ "kvm_assigned_msi_device", (void *)adev))
+ return -EIO;
+ }
+
+ adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_MSI |
+ KVM_ASSIGNED_DEV_HOST_MSI;
+ return 0;
+}
+
static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
struct kvm_assigned_irq
*assigned_irq)
@@ -291,9 +336,26 @@ static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
}
}
- r = assigned_device_update_intx(kvm, match, assigned_irq);
- if (r)
- goto out_release;
+ if (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI) {
+ r = assigned_device_update_msi(kvm, match, assigned_irq);
+ if (r) {
+ printk(KERN_WARNING "kvm: failed to enable "
+ "MSI device!\n");
+ goto out_release;
+ }
+ } else if (assigned_irq->host_irq == 0 && match->dev->irq == 0) {
+ /* Host device IRQ 0 means don't support INTx */
+ printk(KERN_WARNING "kvm: wait device to enable MSI!\n");
+ r = 0;
+ } else {
+ /* Non-sharing INTx mode */
+ r = assigned_device_update_intx(kvm, match, assigned_irq);
+ if (r) {
+ printk(KERN_WARNING "kvm: failed to enable "
+ "INTx device!\n");
+ goto out_release;
+ }
+ }
mutex_unlock(&kvm->lock);
return r;
--
1.5.4.5
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