Re: [RFC] KVM: SVM: ignore type when setting segment registers

From	Gi-Oh Kim <gi-oh.kim@profitbricks.com>
Newsgroups	linux.kernel
Subject	Re: [RFC] KVM: SVM: ignore type when setting segment registers
Date	2017-05-31 08:50 +0200
Message-ID	<tN5C9-1gO-9@gated-at.bofh.it> (permalink)
References	<tMsU9-s2-11@gated-at.bofh.it> <tMOUF-7tv-7@gated-at.bofh.it> <tMTUm-2jI-25@gated-at.bofh.it>
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On Tue, May 30, 2017 at 8:03 PM, Matt Mullins <mmullins@mmlx.us> wrote:
> On Tue, May 30, 2017 at 02:54:21PM +0200, Radim Krčmář wrote:
>> 2017-05-29 15:24+0200, Gioh Kim:
>> > If so, why type is checked when setting segment registers?
>>
>> No idea.  19bca6ab75d8 ("KVM: SVM: Fix cross vendor migration issue with
>> unusable bit") also moved the assigment up to initialize it before use
>> and I think that is enough.
>
> Was this perhaps intended to instead check for a zero selector, which is also
> an unusable segment?

I think that is what present value is for.


-- 
Best regards,
Gi-Oh Kim
TEL: 0176 2697 8962

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[RFC] KVM: SVM: ignore type when setting segment registers Gioh Kim <gi-oh.kim@profitbricks.com> - 2017-05-29 15:30 +0200
  Re: [RFC] KVM: SVM: ignore type when setting segment registers Radim Krčmář <rkrcmar@redhat.com> - 2017-05-30 15:00 +0200
    Re: [RFC] KVM: SVM: ignore type when setting segment registers Gioh Kim <gi-oh.kim@profitbricks.com> - 2017-05-30 15:40 +0200
    Re: [RFC] KVM: SVM: ignore type when setting segment registers Matt Mullins <mmullins@mmlx.us> - 2017-05-30 20:20 +0200
      Re: [RFC] KVM: SVM: ignore type when setting segment registers Gi-Oh Kim <gi-oh.kim@profitbricks.com> - 2017-05-31 08:50 +0200

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