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| author |   Gleb Natapov <gleb@redhat.com> | 2009-02-04 17:28:14 +0200 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2009-03-24 11:03:11 +0200 |
| commit | 4925663a079c77d95d8685228ad6675fc5639c8e (patch) | |
| tree | 52e93df78b23a44ed21d015f835688f673dd351a /arch/ia64/kvm | |
| parent | KVM: MMU: remove assertion in kvm_mmu_alloc_page (diff) | |
| download | linux-dev-4925663a079c77d95d8685228ad6675fc5639c8e.tar.xz linux-dev-4925663a079c77d95d8685228ad6675fc5639c8e.zip | |
KVM: Report IRQ injection status to userspace.
IRQ injection status is either -1 (if there was no CPU found
that should except the interrupt because IRQ was masked or
ioapic was misconfigured or ...) or >= 0 in that case the
number indicates to how many CPUs interrupt was injected.
If the value is 0 it means that the interrupt was coalesced
and probably should be reinjected.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/ia64/kvm')
| -rw-r--r-- | arch/ia64/kvm/kvm-ia64.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 9c77e3939e97..076b00d1dbff 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -182,7 +182,7 @@ int kvm_dev_ioctl_check_extension(long ext) switch (ext) { case KVM_CAP_IRQCHIP: case KVM_CAP_MP_STATE: - + case KVM_CAP_IRQ_INJECT_STATUS: r = 1; break; case KVM_CAP_COALESCED_MMIO: @@ -927,6 +927,7 @@ long kvm_arch_vm_ioctl(struct file *filp, goto out; } break; + case KVM_IRQ_LINE_STATUS: case KVM_IRQ_LINE: { struct kvm_irq_level irq_event; @@ -934,10 +935,17 @@ long kvm_arch_vm_ioctl(struct file *filp, if (copy_from_user(&irq_event, argp, sizeof irq_event)) goto out; if (irqchip_in_kernel(kvm)) { + __s32 status; mutex_lock(&kvm->lock); - kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, + status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irq_event.irq, irq_event.level); mutex_unlock(&kvm->lock); + if (ioctl == KVM_IRQ_LINE_STATUS) { + irq_event.status = status; + if (copy_to_user(argp, &irq_event, + sizeof irq_event)) + goto out; + } r = 0; } break; |