linux-kernel - Re: [RFC PATCH 0/4] KVM: Emulate UMIP (or almost do so)

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Date:   Fri, 10 Mar 2017 09:36:04 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yu Zhang <yu.c.zhang@...ux.intel.com>
Cc:     qian.ouyang@...el.com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [RFC PATCH 0/4] KVM: Emulate UMIP (or almost do so)



On 10/03/2017 09:02, Yu Zhang wrote:
>>   Besides, is this all the test for UMIP unit test? I.e. do we need to
>> construct a scenario in the test to trigger vm exit and let hypervisor
>> inject a GP fault? - I did not see this scenario in this patch. Or any
>> other suggestions? :-)
> 
> Hi Paolo, any suggestions?
> Sorry for the disturb. :)

Hi, you get the scenario where a vmexit is triggered by the hypervisor
if you run the unit test on a machine that lacks UMIP support.

We can also add a module parameter to force emulation, so that it will
be possible to test UMIP emulation on newer processors too.

Paolo