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From: joeyli <jlee@suse.com>
To: Boaz Harrosh <boaz@plexistor.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
	Dan Williams <dan.j.williams@intel.com>,
	Ingo Molnar <mingo@redhat.com>, X86 ML <x86@kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"Roger C. Pao" <rcpao.enmotus@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-nvdimm <linux-nvdimm@ml01.01.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Matthew Wilcox <willy@linux.intel.com>,
	Christoph Hellwig <hch@infradead.org>,
	Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [PATCH 3/3] e820: Add the unknown-12 Memory type (DDR3-NvDIMM)
Date: Tue, 10 Mar 2015 13:11:37 +0800	[thread overview]
Message-ID: <20150310051137.GA18810@linux-rxt1.site> (raw)
In-Reply-To: <54FD8DBD.3070309@plexistor.com>

Hi, 

On Mon, Mar 09, 2015 at 02:10:37PM +0200, Boaz Harrosh wrote:
> On 03/06/2015 01:09 AM, Andy Lutomirski wrote:
> <>
> > 
> > I will be shocked if a standard of this form ever appears.  Modern
> > systems *don't have e820*.  The BIOSes that are using this type 12
> > hack are awful throwbacks.
> 
> So far the systems we have, with DDR4 NvDIMM(s) (Actual chips arriving soon)
> still have BIOS (On by default). The BIOS was yelled "Wolfe" for so long NOW ;-)
> Again these are working system in the field, who will switch them all to UEFI?
> 
> How will the UEFI present them to the system? can you point me to the relevant
> code? (Or did you mean BIOS but with a different communication path than e820?)
>

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.

> > 
> > --Andy
> > 
> 
> Thanks
> Boaz
> 

Thanks a lot!
Joey Lee

  reply	other threads:[~2015-03-10  5:12 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-05 10:16 [PATCH 0/3 v5] e820: Fix handling of NvDIMM chips Boaz Harrosh
2015-03-05 10:20 ` [PATCH 1/3] e820: Don't let unknown DIMM type come out BUSY Boaz Harrosh
2015-03-05 20:41   ` Dan Williams
2015-03-09 10:54     ` Boaz Harrosh
2015-03-05 10:21 ` [PATCH 2/3] resource: Add new flag IORESOURCE_MEM_WARN Boaz Harrosh
2015-03-05 10:24 ` [PATCH 3/3] e820: Add the unknown-12 Memory type (DDR3-NvDIMM) Boaz Harrosh
2015-03-05 20:56   ` Dan Williams
2015-03-05 23:09     ` Andy Lutomirski
2015-03-09 12:10       ` Boaz Harrosh
2015-03-10  5:11         ` joeyli [this message]
2015-03-10  8:56           ` Boaz Harrosh
2015-03-10 13:19           ` Andy Lutomirski
2015-03-09 11:19     ` Boaz Harrosh
2015-03-09 14:44       ` Dan Williams
2015-03-09 15:14         ` Andy Lutomirski
2015-03-09 15:17           ` Dan Williams
2015-03-10  8:47             ` Boaz Harrosh
2015-03-05 10:32 ` [RFC 0/8] pmem: Submission of the Persistent memory block device Boaz Harrosh
2015-03-05 11:55   ` [PATCH 1/8] pmem: Initial version of persistent memory driver Boaz Harrosh
2015-03-05 20:35     ` Paul Bolle
2015-03-05 23:03     ` Andy Lutomirski
2015-03-09 12:20       ` Boaz Harrosh
2015-03-18 18:06         ` Andy Lutomirski
2015-03-26  4:00           ` Elliott, Robert (Server Storage)
2015-03-26  7:51             ` Boaz Harrosh
2015-03-26 21:31             ` Dave Chinner
2015-03-18 17:43     ` Ross Zwisler
2015-03-19  9:24       ` Boaz Harrosh
2015-03-20  0:11         ` Dan Williams
2015-03-05 11:55   ` [PATCH 2/8] pmem: KISS, remove register_blkdev Boaz Harrosh
2015-03-05 11:56   ` [PATCH 3/8] pmem: Add support for rw_page() Boaz Harrosh
2015-03-05 11:57   ` [PATCH 4/8] pmem: Add support for direct_access() Boaz Harrosh
2015-03-05 11:58   ` [PATCH 5/8] mm: Let sparse_{add,remove}_one_section receive a node_id Boaz Harrosh
2015-03-06 18:43     ` Ross Zwisler
2015-03-05 11:59   ` [PATCH 6/8] mm: New add_persistent_memory/remove_persistent_memory Boaz Harrosh
2015-03-05 11:59   ` [PATCH 7/8] pmem: Add support for page structs Boaz Harrosh
2015-03-23 20:59     ` Dan Williams
2015-03-05 12:01   ` [PATCH 8/8] OUT-OF-TREE: pmem: Allow request_mem to fail (BLK_DEV_PMEM_IGNORE_REQUEST_MEM_RET) Boaz Harrosh
2015-03-06 18:37   ` [RFC 0/8] pmem: Submission of the Persistent memory block device Ross Zwisler
2015-03-07  1:39     ` Christoph Hellwig
2015-03-09 12:41     ` Boaz Harrosh
2015-03-05 22:48 ` [PATCH 0/3 v5] e820: Fix handling of NvDIMM chips H. Peter Anvin
2015-03-05 23:06   ` Andy Lutomirski

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