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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-30 15:36:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-30 15:36:45 -0700
commit1bc87b00556e8f7ba30a1010471951c5b8f71114 (patch)
treee73c2d187e2dff0df97ed82e32b45e362b923117 /virt/kvm/assigned-dev.c
parentacff987d94cbdb4049f3706bed1f1792f8ef6837 (diff)
parentf1c1da2bde712812a3e0f9a7a7ebe7a916a4b5f4 (diff)
downloadlinux-linaro-stable-1bc87b00556e8f7ba30a1010471951c5b8f71114.tar.gz
Merge branch 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (75 commits) KVM: SVM: Keep intercepting task switching with NPT enabled KVM: s390: implement sigp external call KVM: s390: fix register setting KVM: s390: fix return value of kvm_arch_init_vm KVM: s390: check cpu_id prior to using it KVM: emulate lapic tsc deadline timer for guest x86: TSC deadline definitions KVM: Fix simultaneous NMIs KVM: x86 emulator: convert push %sreg/pop %sreg to direct decode KVM: x86 emulator: switch lds/les/lss/lfs/lgs to direct decode KVM: x86 emulator: streamline decode of segment registers KVM: x86 emulator: simplify OpMem64 decode KVM: x86 emulator: switch src decode to decode_operand() KVM: x86 emulator: qualify OpReg inhibit_byte_regs hack KVM: x86 emulator: switch OpImmUByte decode to decode_imm() KVM: x86 emulator: free up some flag bits near src, dst KVM: x86 emulator: switch src2 to generic decode_operand() KVM: x86 emulator: expand decode flags to 64 bits KVM: x86 emulator: split dst decode to a generic decode_operand() KVM: x86 emulator: move memop, memopp into emulation context ...
Diffstat (limited to 'virt/kvm/assigned-dev.c')
-rw-r--r--virt/kvm/assigned-dev.c62
1 files changed, 33 insertions, 29 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index eaf3a50f9769..3ad0925d23a9 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);
@@ -68,31 +66,35 @@ 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)
{
- 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 +112,9 @@ 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);
@@ -143,7 +146,7 @@ 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 +156,7 @@ 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);
@@ -239,7 +242,7 @@ 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;
}
@@ -258,7 +261,7 @@ 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;
}
@@ -284,8 +287,8 @@ 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);
+ NULL, kvm_assigned_dev_thread_msix,
+ 0, dev->irq_name, dev);
if (r)
goto err;
}
@@ -293,7 +296,7 @@ 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;
}
@@ -406,7 +409,8 @@ 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);