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    SubjectRE: [PATCH 4/4] x86: properly handle kvm emulation of hyperv
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    > -----Original Message-----
    > From: Jason Wang [mailto:jasowang@redhat.com]
    > Sent: Tuesday, July 23, 2013 5:41 AM
    > To: tglx@linutronix.de; mingo@redhat.com; hpa@zytor.com; x86@kernel.org;
    > gleb@redhat.com; pbonzini@redhat.com; kvm@vger.kernel.org; linux-
    > kernel@vger.kernel.org
    > Cc: Jason Wang; KY Srinivasan
    > Subject: [PATCH 4/4] x86: properly handle kvm emulation of hyperv
    >
    > Recent kvm has some basic support of hyperv, this will cause the guest to
    > identify itself as running on top of hyperv instead of kvm which will disable
    > kvm pv functionality. This is because we try to detect hyperv before kvm. Solve
    > this by simply checking kvm in detect_hypervisor() first.
    >

    This strategy of hypervisor detection based on some detection order IMHO is not
    a robust detection strategy. The current scheme works since the only hypervisor emulated
    (by other hypervisors happens to be Hyper-V). What if this were to change.

    Regards,

    K. Y





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