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From: Toshi Kani <toshi.kani@hp.com>
To: Baoquan He <bhe@redhat.com>
Cc: linux-nvdimm@ml01.01.org, kexec@lists.infradead.org
Subject: Re: kexec, x86: Need a new e820 type support for kexec
Date: Fri, 24 Jul 2015 08:37:19 -0600	[thread overview]
Message-ID: <1437748639.3214.379.camel@hp.com> (raw)
In-Reply-To: <20150724053145.GA19975@dhcp-128-28.nay.redhat.com>

On Fri, 2015-07-24 at 13:31 +0800, Baoquan He wrote:
> On 07/23/15 at 06:26pm, Toshi Kani wrote:
> > Hello,
> > 
> > ACPI 6.0 defines a new type in e820, AddressRangePersistentMemory (7), 
> > for
> > NVDIMM.  On a system with NVDIMM, kexec displays the following error
> > message and sets it to RANGE_RESERVED as the fallback type.
> > 
> > Unknown type (Persistent Memory) while parsing
> > /sys/firmware/memmap/34/type. Please report this as bug. Using
> > RANGE_RESERVED now.
> > 
> > This new type is defined in "arch/x86/include/uapi/asm/e820.h" in 4.2
> > -rc1
> > as follows. 
> > 
> >   #define E820_PMEM       7
> 
> It need be added in struct e820entry:include/x86/x86-linux.h and
> memory_range:kexec/kexec.h and their related handling. Could you give
> more details about this memory type? I downloaded a ACPI 6.0 spec but
> am not familiar with this.

Oh, I see.  It has a locally defined header.  The e820 types are defined in
Table 15-312, page 683, of ACPI 6.0.

Thanks,
-Toshi


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  parent reply	other threads:[~2015-07-24 14:38 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-24  0:26 kexec, x86: Need a new e820 type support for kexec Toshi Kani
2015-07-24  5:31 ` Baoquan He
2015-07-24  5:50   ` Baoquan He
2015-07-24 14:27     ` Toshi Kani
2015-07-24 14:37   ` Toshi Kani [this message]
2015-08-06  8:12 ` Baoquan He
2015-08-06  8:12   ` Baoquan He
2015-08-07  1:13   ` Toshi Kani
2015-08-07  1:13     ` Toshi Kani
2015-08-18  8:34     ` Baoquan He
2015-08-18  8:34       ` Baoquan He
2015-08-18 14:55       ` Toshi Kani
2015-08-18 14:55         ` Toshi Kani
2015-08-18  8:53     ` Baoquan He
2015-08-18  8:53       ` Baoquan He
2015-08-18 15:01       ` Toshi Kani
2015-08-18 15:01         ` Toshi Kani
2015-08-19  2:53         ` Baoquan He
2015-08-19  2:53           ` Baoquan He
2015-08-19  5:36           ` Toshi Kani
2015-08-19  5:36             ` Toshi Kani
2015-08-19  5:59             ` Baoquan He
2015-08-19  5:59               ` Baoquan He

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