[PATCH v2 15/16] Fix userspace IRQ chip migration.

Gleb Natapov
2009-04-21T14:45:17Z

Re-put pending IRQ vector into interrupt_bitmap before migration.
Otherwise it will be lost if migration happens in the wrong time.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
---
arch/x86/kvm/x86.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cae1985..7bea346 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3556,17 +3556,17 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
sregs->efer = vcpu->arch.shadow_efer;
sregs->apic_base = kvm_get_apic_base(vcpu);

- if (irqchip_in_kernel(vcpu->kvm)) {
+ if (irqchip_in_kernel(vcpu->kvm))
memset(sregs->interrupt_bitmap, 0,
sizeof sregs->interrupt_bitmap);
- pending_vec = kvm_x86_ops->get_irq(vcpu);
- if (pending_vec >= 0)
- set_bit(pending_vec,
- (unsigned long *)sregs->interrupt_bitmap);
- } else
+ else
memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending,
sizeof sregs->interrupt_bitmap);

+ pending_vec = kvm_x86_ops->get_irq(vcpu);
+ if (pending_vec >= 0)
+ set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
+
vcpu_put(vcpu);

return 0;
--
1.5.6.5