From: Paolo Bonzini <pbonzini@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>, kvm-devel <kvm@vger.kernel.org>
Cc: Gleb Natapov <gleb@kernel.org>, Bandan Das <bsd@redhat.com>,
Nadav Amit <namit@cs.technion.ac.il>
Subject: Re: KVM: nested VMX: disable perf cpuid reporting
Date: Mon, 22 Sep 2014 21:16:16 +0200 [thread overview]
Message-ID: <54207580.2060303@redhat.com> (raw)
In-Reply-To: <20140922190103.GA2349@amt.cnet>
Il 22/09/2014 21:01, Marcelo Tosatti ha scritto:
> On Thu, Sep 18, 2014 at 06:24:57PM -0300, Marcelo Tosatti wrote:
>>
>> Initilization of L2 guest with -cpu host, on L1 guest with -cpu host
>> triggers:
>>
>> (qemu) KVM: entry failed, hardware error 0x7
>> ...
>> nested_vmx_run: VMCS MSR_{LOAD,STORE} unsupported
>>
>> Nested VMX MSR load/store support is not sufficient to
>> allow perf for L2 guest.
>>
>> Until properly fixed, trap CPUID and disable function 0xA.
>>
>> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
>
> Ping, Paolo?
>
Sorry, didn't push to kvm/queue but I've already applied the patch
locally. I will do it first thing tomorrow (my workstation is off right
now so I cannot send you a SHA).
Paolo
prev parent reply other threads:[~2014-09-22 19:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 21:24 KVM: nested VMX: disable perf cpuid reporting Marcelo Tosatti
2014-09-19 13:28 ` Paolo Bonzini
2014-09-22 19:01 ` Marcelo Tosatti
2014-09-22 19:16 ` Paolo Bonzini [this message]
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