linux-kernel - Re: [PATCH 5/8] ACPI, APEI, CPER: Add UEFI 2.4 support for memory error

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Message-ID: <20131016013519.GA6898@gchen.bj.intel.com>
Date:	Tue, 15 Oct 2013 21:35:19 -0400
From:	Chen Gong <gong.chen@...ux.intel.com>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:	tony.luck@...el.com, bp@...en8.de, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 5/8] ACPI, APEI, CPER: Add UEFI 2.4 support for memory
 error

On Tue, Oct 15, 2013 at 10:56:25PM +0530, Naveen N. Rao wrote:
> Date: Tue, 15 Oct 2013 22:56:25 +0530
> From: "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
> To: "Chen, Gong" <gong.chen@...ux.intel.com>
> Cc: tony.luck@...el.com, bp@...en8.de, linux-kernel@...r.kernel.org,
>  linux-acpi@...r.kernel.org
> Subject: Re: [PATCH 5/8] ACPI, APEI, CPER: Add UEFI 2.4 support for memory
>  error
> User-Agent: Mutt/1.5.21 (2010-09-15)
> 
> On 2013/10/11 02:32AM, Chen Gong wrote:
> > In latest UEFI spec(by now it is 2.4) memory error definition
> > for CPER (UEFI 2.4 Appendix N Common Platform Error Record)
> > adds some new fields. These fields help people to locate
> > memory error on actual DIMM location.
> > 
> > Original-author: Tony Luck <tony.luck@...el.com>
> > Signed-off-by: Chen, Gong <gong.chen@...ux.intel.com>
> > ---
> >  drivers/acpi/apei/cper.c | 3 ++-
> >  include/linux/cper.h     | 7 +++++++
> >  2 files changed, 9 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
> > index b2e4134..680230c 100644
> > --- a/drivers/acpi/apei/cper.c
> > +++ b/drivers/acpi/apei/cper.c
> > @@ -8,7 +8,7 @@
> >   * various tables, such as ERST, BERT and HEST etc.
> >   *
> >   * For more information about CPER, please refer to Appendix N of UEFI
> > - * Specification version 2.3.
> > + * Specification version 2.4.
> >   *
> >   * This program is free software; you can redistribute it and/or
> >   * modify it under the terms of the GNU General Public License version
> > @@ -191,6 +191,7 @@ static const char *cper_mem_err_type_strs[] = {
> >  	"memory sparing",
> >  	"scrub corrected error",
> >  	"scrub uncorrected error",
> > +	"Physical Memory Map-out event",
> 
> All small letters to match the rest of the items:
> "physical memory map-out event"
> 

sure, of course.

> >  };
> >  
> >  static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
> > diff --git a/include/linux/cper.h b/include/linux/cper.h
> > index c230494..bd01c9a 100644
> > --- a/include/linux/cper.h
> > +++ b/include/linux/cper.h
> > @@ -232,6 +232,9 @@ enum {
> >  #define CPER_MEM_VALID_RESPONDER_ID		0x1000
> >  #define CPER_MEM_VALID_TARGET_ID		0x2000
> >  #define CPER_MEM_VALID_ERROR_TYPE		0x4000
> > +#define CPER_MEM_VALID_RANK_NUMBER		0x8000
> > +#define CPER_MEM_VALID_CARD_HANDLE		0x10000
> > +#define CPER_MEM_VALID_MODULE_HANDLE		0x20000
> >  
> >  #define CPER_PCIE_VALID_PORT_TYPE		0x0001
> >  #define CPER_PCIE_VALID_VERSION			0x0002
> > @@ -347,6 +350,10 @@ struct cper_sec_mem_err {
> >  	__u64	responder_id;
> >  	__u64	target_id;
> >  	__u8	error_type;
> > +	__u8	reserved;
> > +	__u16	rank;
> > +	__u16	mem_array_handle;
> > +	__u16	mem_dev_handle;
> 
> Nit: could you name those fields similar to what the spec has:
> card_handle and module_handle, with perhaps a comment to indicate
> relationship to SMBIOS type 16/17 tables?
> 
> 
On the contrary, what I'm thinking is reserve these names but
adding comments for what it is in the spec. I consider a
reasonable name is more meaningful than just following the
spec strictly.

> Regards,
> Naveen
> 
> >  };
> >  
> >  struct cper_sec_pcie {
> > -- 
> > 1.8.4.rc3
> > 
> 

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