linux-kernel - Re: [PATCH -v5 05/14] ACPI, APEI, Document for APEI

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Date:	Wed, 19 May 2010 11:06:42 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	"lenb@...nel.org" <lenb@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH -v5 05/14] ACPI, APEI, Document for APEI

Hi, Randy,

On Wed, 2010-05-19 at 05:51 +0800, Randy Dunlap wrote:
> Huang Ying wrote:
> > Add document for APEI, including kernel parameters and EINJ debug file
> > sytem interface.
> > 
> > Signed-off-by: Huang Ying <ying.huang@...el.com>
> > Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> > ---
> >  Documentation/acpi/apei/einj.txt    |   49 ++++++++++++++++++++++++++++++++++++
> >  Documentation/kernel-parameters.txt |    5 +++
> >  2 files changed, 54 insertions(+)
> >  create mode 100644 Documentation/acpi/apei/einj.txt
> > 
> > --- /dev/null
> > +++ b/Documentation/acpi/apei/einj.txt
> > @@ -0,0 +1,49 @@
> > +			APEI Error INJection
> > +			~~~~~~~~~~~~~~~~~~~~
> > +
> > +EINJ provides a hardware error injection mechanism, it is very useful
> 
>                                                      ; [or . + new sentence]
> 
> > +for debugging and testing of other APEI and RAS features.
> > +
> > +To use EINJ, make the following is enabled in your kernel
> 
>                 make sure the following are enabled
> 
> > +configuration:
> > +
> > +CONFIG_DEBUG_FS
> > +CONFIG_ACPI_APEI
> > +CONFIG_ACPI_APEI_EINJ
> > +
> > +The user interface of EINJ is in debug file system, under the
> 
>                               is the debug file system,
> [or "is in the debug file system"]
> 
> > +directory apei/einj. The following files are provided.
> > +
> > +- available_error_type
> > +  Read this file will return the error injection capability of the
> 
>      Reading this file returns ...
> 
> > +  platform, that is, which error types are supported. The error type
> > +  definition is as follow, the left field is the error type value, the
> > +  right field is error description.
> > +
> > +    0x00000001	Processor Correctable
> > +    0x00000002	Processor Uncorrectable non-fatal
> > +    0x00000004	Processor Uncorrectable fatal
> > +    0x00000008  Memory Correctable
> > +    0x00000010  Memory Uncorrectable non-fatal
> > +    0x00000020  Memory Uncorrectable fatal
> > +    0x00000040	PCI Express Correctable
> > +    0x00000080	PCI Express Uncorrectable fatal
> > +    0x00000100	PCI Express Uncorrectable non-fatal
> > +    0x00000200	Platform Correctable
> > +    0x00000400	Platform Uncorrectable non-fatal
> > +    0x00000800	Platform Uncorrectable fatal
> > +
> > +  The format of file contents are as above, except there are only the
> > +  available error type lines.
> > +
> > +- error_type
> > +  This file is used to set the error type value. The error type value
> > +  is defined in "available_error_type" description.
> > +
> > +- error_inject
> > +  Write any integer to this file to trigger the error
> > +  injection. Before this, please specify all necessary error
> > +  parameters.
> > +
> > +For more information about EINJ, please refer to ACPI specification
> > +version 4.0, section 17.5.
> > --- a/Documentation/kernel-parameters.txt
> > +++ b/Documentation/kernel-parameters.txt
> > @@ -843,6 +843,11 @@ and is between 256 and 4096 characters.
> >  	hd=		[EIDE] (E)IDE hard drive subsystem geometry
> >  			Format: <cyl>,<head>,<sect>
> >  
> > +	hest_disable	[ACPI]
> > +			Disable Hardware Error Source Table (HEST) support,
> 
> s/,/;/
> 
> > +			corresponding firmware-first mode error processing
> > +			logic will be disabled.
> > +
> >  	highmem=nn[KMG]	[KNL,BOOT] forces the highmem zone to have an exact
> >  			size of <nn>. This works even on boxes that have no
> >  			highmem otherwise. This also works to reduce highmem

Thanks, will fix theses. Sorry for my poor English.

Best Regards,
Huang Ying

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