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From: Paul Durrant <Paul.Durrant@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Andrew Cooper <Andrew.Cooper3@citrix.com>,
	"Keir (Xen.org)" <keir@xen.org>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH v4 1/2] x86/hvm/viridian: keep APIC assist page mapped...
Date: Thu, 17 Mar 2016 12:00:35 +0000	[thread overview]
Message-ID: <e51eb5306e8c4d0ebf2420df719c7318@AMSPEX02CL03.citrite.net> (raw)
In-Reply-To: <56EAAA0B02000078000DDCEA@prv-mh.provo.novell.com>

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@suse.com]
> Sent: 17 March 2016 11:59
> To: Paul Durrant
> Cc: Andrew Cooper; xen-devel@lists.xenproject.org; Keir (Xen.org)
> Subject: Re: [PATCH v4 1/2] x86/hvm/viridian: keep APIC assist page
> mapped...
> 
> >>> On 17.03.16 at 09:37, <paul.durrant@citrix.com> wrote:
> > +static void teardown_apic_assist(struct vcpu *v)
> > +{
> > +    struct page_info *page = v->arch.hvm_vcpu.viridian.apic_assist.page;
> > +    void *va = v->arch.hvm_vcpu.viridian.apic_assist.va;
> >
> > +    if ( !va )
> > +        return;
> > +
> > +    v->arch.hvm_vcpu.viridian.apic_assist.va = NULL;
> > +    v->arch.hvm_vcpu.viridian.apic_assist.page = NULL;
> > +
> > +    unmap_domain_page_global(va);
> >      put_page_and_type(page);
> >  }
> 
> The apic_assist.page field is needed only here, and is redundant
> with the va being stored (from which it can be derived via
> domain_page_map_to_mfn()). Please let's avoid needlessly
> growing struct vcpu.
> 

Ok. I'll drop it then.

  Paul

> Jan


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  reply	other threads:[~2016-03-17 12:05 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-17  8:37 [PATCH v4 0/2] x86/hvm/viridian: APIC assist Paul Durrant
2016-03-17  8:37 ` [PATCH v4 1/2] x86/hvm/viridian: keep APIC assist page mapped Paul Durrant
2016-03-17 10:50   ` Andrew Cooper
2016-03-17 11:13     ` Paul Durrant
2016-03-17 11:58   ` Jan Beulich
2016-03-17 12:00     ` Paul Durrant [this message]
2016-03-17  8:37 ` [PATCH v4 2/2] x86/hvm/viridian: Enable APIC assist enlightenment Paul Durrant

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