KVM: x86: export paravirtual cpuid flags in KVM_GET_SUPPORTED_CPUID

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Right now, we were using individual KVM_CAP entities to communicate
userspace about which cpuids we support. This is suboptimal, since it
generates a delay between the feature arriving in the host, and
being available at the guest.

A much better mechanism is to list para features in KVM_GET_SUPPORTED_CPUID.
This makes userspace automatically aware of what we provide. And if we
ever add a new cpuid bit in the future, we have to do that again,
which create some complexity and delay in feature adoption.

Signed-off-by: Glauber Costa <glommer@redhat.com>
Acked-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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Glauber Costa 2010-05-11 12:17:43 -04:00 • committed by Avi Kivity

parent 0e6ac58acb

commit 84478c829d

1 changed files with 34 additions and 0 deletions

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arch/x86/kvm/x86.c

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