From cc0793968a602c9b40f7b99c401674750aa99e06 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Mon, 12 Sep 2011 18:57:56 +0200 Subject: [PATCH] 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 Signed-off-by: Marcelo Tosatti --- virt/kvm/assigned-dev.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 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); @@ -68,21 +66,29 @@ 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); + 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, + 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;