I apologize if this was already reported,
I just noticed that with the latest updates QEMU doesn't start with the
following configuration:
qemu-system-x86_64 -name guest=win10 -machine pc,accel=kvm -cpu
host,hv_vpindex,hv_synic ...
qemu-system-x86_64: failed to turn on HyperV SynIC in KVM: Invalid argument
qemu-system-x86_64: kvm_init_vcpu failed: Invalid argument
If I add 'kernel-irqchip=split' or ',kernel-irqchip=on' it starts as
usual. I bisected this to the following commit:
commit 11bc4a13d1f4b07dafbd1dda4d4bf0fdd7ad65f2 (HEAD, refs/bisect/bad)
Author: Paolo Bonzini <pbonz...@redhat.com>
Date: Wed Nov 13 10:56:53 2019 +0100
kvm: convert "-machine kernel_irqchip" to an accelerator property
so aparently we now default to 'kernel_irqchip=off'. Is this the desired
behavior?
--
Vitaly
