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

[Juergen Gross]

On 07/09/17 20:38, Andy Lutomirski wrote:
> On Thu, Sep 7, 2017 at 2:34 AM, Juergen Gross <jgross@xxxxxxxx> 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