Re: [Xen-devel] [PATCH v2 2/2] x86/hvm/viridian: Enable APIC assist enlightenment

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx]
> Sent: 16 March 2016 17:47
> To: Paul Durrant
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; Wei Liu; Stefano Stabellini; Andrew
> Cooper; Ian Jackson; Jan Beulich; Keir (Xen.org)
> Subject: Re: [Xen-devel] [PATCH v2 2/2] x86/hvm/viridian: Enable APIC assist
> enlightenment
> 
> On Wed, Mar 16, 2016 at 03:35:03PM +0000, Paul Durrant wrote:
> > This patch adds code to enable the APIC assist enlightenment which,
> > under certain conditions, means that the guest can avoid an EOI of
> > the local APIC and thereby avoid a VMEXIT.
> >
> > Use of the enlightenment by the hypervisor is under control of the
> > toolstack, and is added to the default set.
> >
> > Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> > Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> > Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> > Cc: Keir Fraser <keir@xxxxxxx>
> > Cc: Jan Beulich <jbeulich@xxxxxxxx>
> > Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> > ---
> >
> > v2:
> >  - Removed some code duplication and unnecessary read-modify-write
> >    operations on the APIC assist word.
> >  - Stated in the xl.cfg text that the enlightenment has no effect if
> >    posted interrupts are in use.
> >  - Added the enlightenment to the default set.
> 
> But you missed the sprinkling of spaces..

Did I? Damn, I thought I'd got them.

  Paul


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