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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next prev parent reply other threads:[~2015-07-24 14:38 UTC|newest]
Thread overview: 14+ 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
2015-08-07 1:13 ` Toshi Kani
2015-08-18 8:34 ` Baoquan He
2015-08-18 14:55 ` Toshi Kani
2015-08-18 8:53 ` Baoquan He
2015-08-18 15:01 ` Toshi Kani
2015-08-19 2:53 ` Baoquan He
2015-08-19 5:36 ` Toshi Kani
2015-08-19 5:59 ` Baoquan He
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