Re: [RFC 08/17] x86/asm/64: De-Xen-ify our NMI code

From	Juergen Gross <jgross@suse.com>
Newsgroups	linux.kernel
Subject	Re: [RFC 08/17] x86/asm/64: De-Xen-ify our NMI code
Date	2017-09-08 06:30 +0200
Message-ID	<unj5v-1O4-1@gated-at.bofh.it> (permalink)
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On 07/09/17 20:38, Andy Lutomirski wrote:
> On Thu, Sep 7, 2017 at 2:34 AM, Juergen Gross <jgross@suse.com> wrote:
>> On 06/09/17 23:36, Andy Lutomirski wrote:
>>> Xen PV is fundamentally incompatible with our fancy NMI code: it
>>> doesn't use IST at all, and Xen entries clobber two stack slots
>>> below the hardware frame.
>>>
>>> Drop Xen PV support from our NMI code entirely.
>>>
>>> XXX: Juergen: could you write and test the tiny patch needed to
>>> make Xen PV have a xen_nmi entry that handles NMIs?  I don't know
>>> how to test it.
>>
>> You mean something like the attached one?
> 
> Yes.  Mind if I add it to my series?

Go ahead!


Juergen

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[RFC 08/17] x86/asm/64: De-Xen-ify our NMI code Andy Lutomirski <luto@kernel.org> - 2017-09-06 23:40 +0200
  Re: [RFC 08/17] x86/asm/64: De-Xen-ify our NMI code Juergen Gross <jgross@suse.com> - 2017-09-07 11:40 +0200
    Re: [RFC 08/17] x86/asm/64: De-Xen-ify our NMI code Andy Lutomirski <luto@kernel.org> - 2017-09-07 20:40 +0200
      Re: [RFC 08/17] x86/asm/64: De-Xen-ify our NMI code Juergen Gross <jgross@suse.com> - 2017-09-08 06:30 +0200

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