Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752646AbbBWMqc (ORCPT ); Mon, 23 Feb 2015 07:46:32 -0500 Received: from mail-wi0-f169.google.com ([209.85.212.169]:51983 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752078AbbBWMqb (ORCPT ); Mon, 23 Feb 2015 07:46:31 -0500 Message-ID: <54EB2124.7040701@plexistor.com> Date: Mon, 23 Feb 2015 14:46:28 +0200 From: Boaz Harrosh User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Ingo Molnar , Ross Zwisler , x86@kernel.org, linux-kernel , "Roger C. Pao" , Dan Williams , Thomas Gleixner , Linus Torvalds , linux-nvdimm , "H. Peter Anvin" , Matthew Wilcox , Andy Lutomirski , Christoph Hellwig Subject: [PATCH 3A/3 good] e820: Add the unknown-12 Memory type (DDR3-NvDIMM) References: <54EB1D33.3050107@plexistor.com> In-Reply-To: <54EB1D33.3050107@plexistor.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2344 Lines: 72 There are multiple vendors of DDR3 NvDIMMs out in the market today. At various stages of development/production. It is estimated that there are already more the 100ds of thousands chips sold to testers and sites. All the BIOS vendors I know of, tagged these chips at e820 table as type-12 memory. Now the ACPI comity, as far as I know, did not yet define a standard type for NvDIMM. Also, as far as I know any NvDIMM standard will only be defined for DDR4. So DDR3 NvDIMM is probably stuck with this none STD type. I Wish and call the ACPI comity to Define that NvDIMM is type-12. Also for DDR4 In this patch I name type-12 "unknown-12". This is because of ACPI politics that refuse to reserve type-12 as DDR3-NvDIMM and members keep saying: "What if ACPI assigns type-12 for something else in future" [And I say: Then just don't. Please?] Signed-off-by: Boaz Harrosh --- arch/x86/kernel/e820.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 18a9850..023dd29 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -25,6 +25,11 @@ #include #include +/* These are nonstandard Memory types that we do not want in the exported + * header. + */ +#define E820_UNKNOWN_12 12 /* This is the unofficial DDR3-NVDIMM */ + /* * The e820 map is the map that gets modified e.g. with command line parameters * and that is also registered with modifications in the kernel resource tree @@ -169,6 +174,9 @@ static void __init e820_print_type(u32 type) case E820_UNUSABLE: printk(KERN_CONT "unusable"); break; + case E820_UNKNOWN_12: + printk(KERN_CONT "unknown-12"); + break; default: printk(KERN_CONT "type %u", type); break; @@ -928,6 +936,7 @@ static inline const char *e820_type_to_string(int e820_type) case E820_NVS: return "ACPI Non-volatile Storage"; case E820_UNUSABLE: return "Unusable memory"; case E820_RESERVED: return "reserved"; + case E820_UNKNOWN_12: return "unkown-12"; default: return "reserved-unkown"; } } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/