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Re: [Qemu-devel] kvm: "warning: host doesn't support requested feature:
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] kvm: "warning: host doesn't support requested feature: CPUID.01H:ECX.x2apic [bit 21]" |
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Date: |
Sat, 20 Feb 2016 04:00:30 -0500 (EST) |
----- Original Message -----
> From: "Jan Kiszka" <address@hidden>
> To: "Eduardo Habkost" <address@hidden>, "Paolo Bonzini" <address@hidden>
> Cc: "qemu-devel" <address@hidden>, "kvm" <address@hidden>
> 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