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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2011-09-12 18:57:56 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-09-25 19:52:45 +0300 |
| commit | cc0793968a602c9b40f7b99c401674750aa99e06 (patch) | |
| tree | 9ffe6978abe91b4e8cc330e530204e08844e194c /virt | |
| parent | 9bc5791d4aa78b72abd76f506c0a391a54abc4d1 (diff) | |
| download | linux-cc0793968a602c9b40f7b99c401674750aa99e06.tar.gz linux-cc0793968a602c9b40f7b99c401674750aa99e06.tar.bz2 linux-cc0793968a602c9b40f7b99c401674750aa99e06.zip | |
KVM: Split up MSI-X assigned device IRQ handler
The threaded IRQ handler for MSI-X has almost nothing in common with the
INTx/MSI handler. Move its code into a dedicated handler.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/assigned-dev.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index 84ead5489650..7debe8c9e10e 100644 --- a/virt/kvm/assigned-dev.c +++ b/virt/kvm/assigned-dev.c @@ -58,8 +58,6 @@ static int find_index_from_host_irq(struct kvm_assigned_dev_kernel static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id) { struct kvm_assigned_dev_kernel *assigned_dev = dev_id; - u32 vector; - int index; if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) { spin_lock(&assigned_dev->intx_lock); @@ -68,20 +66,28 @@ static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id) spin_unlock(&assigned_dev->intx_lock); } - if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { - index = find_index_from_host_irq(assigned_dev, irq); - if (index >= 0) { - vector = assigned_dev-> - guest_msix_entries[index].vector; - kvm_set_irq(assigned_dev->kvm, - assigned_dev->irq_source_id, vector, 1); - } - } else + kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, + assigned_dev->guest_irq, 1); + + return IRQ_HANDLED; +} + +#ifdef __KVM_HAVE_MSIX +static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id) +{ + struct kvm_assigned_dev_kernel *assigned_dev = dev_id; + int index = find_index_from_host_irq(assigned_dev, irq); + u32 vector; + + if (index >= 0) { + vector = assigned_dev->guest_msix_entries[index].vector; kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, - assigned_dev->guest_irq, 1); + vector, 1); + } return IRQ_HANDLED; } +#endif /* Ack the irq line for an assigned device */ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) @@ -279,7 +285,7 @@ static int assigned_device_enable_host_msix(struct kvm *kvm, for (i = 0; i < dev->entries_nr; i++) { r = request_threaded_irq(dev->host_msix_entries[i].vector, - NULL, kvm_assigned_dev_thread, + NULL, kvm_assigned_dev_thread_msix, 0, dev->irq_name, dev); if (r) goto err; |