From: Paolo Bonzini <pbonzini@redhat.com>
To: Xuekun Hu <xuekun.hu@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: Does KVM support Intel FlexMigration feature?
Date: Tue, 03 Dec 2013 13:55:11 +0100 [thread overview]
Message-ID: <529DD4AF.9070209@redhat.com> (raw)
In-Reply-To: <CACLBhCR5qEqXD55o4FT7UY0U=_xcvXG2xA=CsZvJH0QqrB1bGg@mail.gmail.com>
Il 03/12/2013 06:50, Xuekun Hu ha scritto:
> Hi, All
>
> Does KVM support Intel FlexMigration feature? If yes, is there a doc
> to describe how to do use it (set cpu features mask)?
> Many thanks.
KVM uses Intel's virtualization extensions (VT-x) for CPUID exits, and
not the masking/faulting MSRs. CPUID support is controlled by userspace
(i.e. outside KVM), using the KVM_GET_SUPPORTED_CPUID and KVM_SET_CPUID2
ioctl.
The ioctls are documented in Documentation/virtual/kvm/api.txt.
The KVM_SET_CPUID2 ioctl is not documented but it is the same as
KVM_SET_CPUID, except that is uses "struct kvm_cpuid2" instead of
"struct kvm_cpuid".
Paolo
prev parent reply other threads:[~2013-12-03 12:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-03 5:50 Does KVM support Intel FlexMigration feature? Xuekun Hu
2013-12-03 12:55 ` Paolo Bonzini [this message]
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