linux-kernel - Re: [PATCH -v3 1/6] x86, MCE: Add a HW injection flag

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Date:	Tue, 10 May 2011 07:14:22 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
Cc:	Borislav Petkov <bp@...64.org>,
	EDAC devel <linux-edac@...r.kernel.org>,
	X86-ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v3 1/6] x86, MCE: Add a HW injection flag

On Mon, May 09, 2011 at 11:29:27PM -0400, Hidetoshi Seto wrote:
> (2011/05/10 3:35), Borislav Petkov wrote:
> > From: Borislav Petkov <borislav.petkov@....com>
> > 
> > Add an mce->inject_flag to denote that we're doing HW injection.
> > 
> > Signed-off-by: Borislav Petkov <borislav.petkov@....com>
> > Acked-by: Ingo Molnar <mingo@...e.hu>
> > ---
> >  arch/x86/include/asm/mce.h |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
> > index eb16e94..a2e3dcf 100644
> > --- a/arch/x86/include/asm/mce.h
> > +++ b/arch/x86/include/asm/mce.h
> > @@ -49,6 +49,7 @@
> >  #define MCJ_CTX_IRQ		2    /* inject context: IRQ */
> >  #define MCJ_NMI_BROADCAST	4    /* do NMI broadcasting */
> >  #define MCJ_EXCEPTION		8    /* raise as exception */
> > +#define MCJ_HW_INJECT		16   /* do a HW MCE inject, i.e. INT18 */
> >  
> >  /* Fields are zero when not available */
> >  struct mce {
> 
> IMHO, we should have better name for this feature; using wrmsr + int$18 is not
> the only way to inject mce event to HW. I'd like to suggest MCJ_AMD_HW_INJECT,
> MCJ_USE_WRMSR or so instead. Then we can have MCJ_USE_APEI_EINJ and so on, for
> various way of MCE injection.

Fair enough, the name might be too generic. Maybe I should change it to
MCJ_HW_MSR_INJECT to denote injecting of hw errors through the MCA MSRs.

-- 
Regards/Gruss,
Boris.

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