linux-kernel - Re: [PATCH 3/3] e820: Add the unknown-12 Memory type (DDR3-NvDIMM)

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Message-ID: <54FEB1CA.5090902@plexistor.com>
Date:	Tue, 10 Mar 2015 10:56:42 +0200
From:	Boaz Harrosh <boaz@...xistor.com>
To:	joeyli <jlee@...e.com>
CC:	Andy Lutomirski <luto@...capital.net>,
	Dan Williams <dan.j.williams@...el.com>,
	Ingo Molnar <mingo@...hat.com>, X86 ML <x86@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Roger C. Pao" <rcpao.enmotus@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-nvdimm <linux-nvdimm@...ts.01.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: Re: [PATCH 3/3] e820: Add the unknown-12 Memory type (DDR3-NvDIMM)

On 03/10/2015 07:11 AM, joeyli wrote:
<>
> 
> Per my understand...
> 
> With EFI Boot Stub, there have setup_e820() codes in arch/x86/boot/compressed/eboot.c
> that used to transfer EFI memmap to e820 entries. Currently doesn't have any
> EFI_MEMORY_TYPE reflects to NvDIMM that will map to e820_type. 
> 
> I wonder what kind of EFI_MEMORY_TYPE reported by UEFI BIOS on those "shipped
> NvDIMMs motherboards", like supermicro X9DRH-iF-NV. Then we may need add code
> to setup_e820() for mapping the efi memory type to e820 type 12 region.
> 

Thanks Joey. This is tremendous help. (Just saved me days of research)

Our DDR4 NvDIMM chips arrive this week I will try and debug all this, also
booting EFI.

If you have any chance to experiments in your lab, and compare notes it
would be great.

<>
> 
> Thanks a lot!
> Joey Lee
> 

Thanks
Boaz

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