From 9f9f6b78776be3de02e0c7533924e6954b918123 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Sun, 11 Sep 2011 10:16:16 +0200 Subject: KVM: Clean up unneeded void pointer casts Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti --- virt/kvm/assigned-dev.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'virt/kvm/assigned-dev.c') diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index 4e9eaeb..ea1bf5d 100644 --- a/virt/kvm/assigned-dev.c +++ b/virt/kvm/assigned-dev.c @@ -143,7 +143,7 @@ static void deassign_host_irq(struct kvm *kvm, for (i = 0; i < assigned_dev->entries_nr; i++) free_irq(assigned_dev->host_msix_entries[i].vector, - (void *)assigned_dev); + assigned_dev); assigned_dev->entries_nr = 0; kfree(assigned_dev->host_msix_entries); @@ -153,7 +153,7 @@ static void deassign_host_irq(struct kvm *kvm, /* Deal with MSI and INTx */ disable_irq(assigned_dev->host_irq); - free_irq(assigned_dev->host_irq, (void *)assigned_dev); + free_irq(assigned_dev->host_irq, assigned_dev); if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI) pci_disable_msi(assigned_dev->dev); @@ -237,7 +237,7 @@ static int assigned_device_enable_host_intx(struct kvm *kvm, * are going to be long delays in accepting, acking, etc. */ if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread, - IRQF_ONESHOT, dev->irq_name, (void *)dev)) + IRQF_ONESHOT, dev->irq_name, dev)) return -EIO; return 0; } @@ -256,7 +256,7 @@ static int assigned_device_enable_host_msi(struct kvm *kvm, dev->host_irq = dev->dev->irq; if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread, - 0, dev->irq_name, (void *)dev)) { + 0, dev->irq_name, dev)) { pci_disable_msi(dev->dev); return -EIO; } @@ -283,7 +283,7 @@ 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, - 0, dev->irq_name, (void *)dev); + 0, dev->irq_name, dev); if (r) goto err; } @@ -291,7 +291,7 @@ static int assigned_device_enable_host_msix(struct kvm *kvm, return 0; err: for (i -= 1; i >= 0; i--) - free_irq(dev->host_msix_entries[i].vector, (void *)dev); + free_irq(dev->host_msix_entries[i].vector, dev); pci_disable_msix(dev->dev); return r; } -- cgit v1.1 From c61fa9d63b40b06522c5f1d940b084323a090688 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Sun, 11 Sep 2011 10:16:20 +0200 Subject: KVM: Avoid needless registrations of IRQ ack notifier for assigned devices We only perform work in kvm_assigned_dev_ack_irq if the guest IRQ is of INTx type. This completely avoids the callback invocation in non-INTx cases by registering the IRQ ack notifier only for INTx. Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti --- virt/kvm/assigned-dev.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'virt/kvm/assigned-dev.c') diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index ea1bf5d..84ead54 100644 --- a/virt/kvm/assigned-dev.c +++ b/virt/kvm/assigned-dev.c @@ -86,13 +86,9 @@ static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id) /* Ack the irq line for an assigned device */ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) { - struct kvm_assigned_dev_kernel *dev; - - if (kian->gsi == -1) - return; - - dev = container_of(kian, struct kvm_assigned_dev_kernel, - ack_notifier); + struct kvm_assigned_dev_kernel *dev = + container_of(kian, struct kvm_assigned_dev_kernel, + ack_notifier); kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); @@ -110,8 +106,9 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) static void deassign_guest_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { - kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); - assigned_dev->ack_notifier.gsi = -1; + if (assigned_dev->ack_notifier.gsi != -1) + kvm_unregister_irq_ack_notifier(kvm, + &assigned_dev->ack_notifier); kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, assigned_dev->guest_irq, 0); @@ -404,7 +401,8 @@ static int assign_guest_irq(struct kvm *kvm, if (!r) { dev->irq_requested_type |= guest_irq_type; - kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); + if (dev->ack_notifier.gsi != -1) + kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); } else kvm_free_irq_source_id(kvm, dev->irq_source_id); -- cgit v1.1 From cc0793968a602c9b40f7b99c401674750aa99e06 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Mon, 12 Sep 2011 18:57:56 +0200 Subject: 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 | 32 +++++++++++++++++++------------- 1 file changed, 19 insertions(+), 13 deletions(-) (limited to 'virt/kvm/assigned-dev.c') diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index 84ead54..7debe8c 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; -- cgit v1.1