linux-kernel - Re: [Xen-devel] [PATCH] x86/amd: fix crash as Xen Dom0 on AMD Trinity systems

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Date:	Wed, 6 Jun 2012 11:27:13 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	Borislav Petkov <bp@...en8.de>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jacob Shin <jacob.shin@....com>,
	Andre Przywara <andre.przywara@....com>, jeremy@...p.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	Jan Beulich <JBeulich@...e.com>, mingo@...e.hu,
	tglx@...utronix.de
Subject: Re: [Xen-devel] [PATCH] x86/amd: fix crash as Xen Dom0 on AMD
 Trinity systems


* H. Peter Anvin <hpa@...or.com> wrote:

> On 05/30/2012 03:33 PM, Konrad Rzeszutek Wilk wrote:
> > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> > index 75f33b2..e74df95 100644
> > --- a/arch/x86/xen/enlighten.c
> > +++ b/arch/x86/xen/enlighten.c
> > @@ -1116,7 +1116,10 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
> >  	.wbinvd = native_wbinvd,
> >  
> >  	.read_msr = native_read_msr_safe,
> > +	.rdmsr_regs = native_rdmsr_safe_regs,
> >  	.write_msr = xen_write_msr_safe,
> > +	.wrmsr_regs = native_wrmsr_safe_regs,
> > +
> >  	.read_tsc = native_read_tsc,
> >  	.read_pmc = native_read_pmc,
> >  
> 
> Okay, tell me again:
> 
> why do we have these hooks again?  Can we please weed out 
> paravirt methods that have no users?

ping?

	Ingo
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