Re: kvm: "warning: host doesn't support requested feature: CPUID.01H:ECX.x2apic [bit 21]"

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----- Original Message -----
> From: "Jan Kiszka" <jan.kiszka@xxxxxx>
> To: "Eduardo Habkost" <ehabkost@xxxxxxxxxx>, "Paolo Bonzini" <pbonzini@xxxxxxxxxx>
> Cc: "qemu-devel" <qemu-devel@xxxxxxxxxx>, "kvm" <kvm@xxxxxxxxxxxxxxx>
> Sent: Saturday, February 20, 2016 9:09:32 AM
> Subject: kvm: "warning: host doesn't support requested feature: CPUID.01H:ECX.x2apic [bit 21]"
> 
> Hi all,
> 
> I suppose 5120901a37 introduced this: qemu with kernel_irqchip=off now
> generates these warnings, one per VCPU, during QEMU startup. Is the plan
> to live with them until we finally have x2APIC emulation in userspace
> (ie. also MSR vmexiting to there), or should we otherwise avoid it?

I think it's a bug, x2apic should be auto-suppressed with kernel_irqchip=off.

Paolo
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