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 11:45:18 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	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


* Borislav Petkov <bp@...en8.de> wrote:

> On Wed, Jun 06, 2012 at 11:27:13AM +0200, Ingo Molnar wrote:
> > 
> > * 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?
> 
> I think we solved all that and hpa wanted to queue them up shortly:
> 
> http://marc.info/?l=linux-kernel&m=133856342618027&w=2

Great, will wait for hpa then.

Thanks,

	Ingo
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