[Qemu-devel] Lost interrupts with upstream KVM

[Jan Kiszka]

Hi Gleb,

with latest kernel modules, namely beginning with 6bc0a1a235 (Remove
irq_pending bitmap), I'm loosing interrupts with upstream's KVM support.
After some bisecting, hair-pulling and a bit meditation I added a
WARN_ON(kvm_cpu_has_interrupt(vcpu)) to kvm_vcpu_ioctl_interrupt, and it
actually triggered right before the guest got stuck.

This didn't trigger with qemu-kvm (and -no-kvm-irqchip) yet but, on the
other hand, I currently do not see a potential bug in upstream's
kvm_arch_pre_run. Could you have a look if you can reproduce,
specifically if this isn't a KVM kernel issue in the end?

TiA,
Jan

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