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Re: [dmidecode] [PATCH] dmidecode: Add option to filter output based upo
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From: |
Elliott, Robert (Persistent Memory) |
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Subject: |
Re: [dmidecode] [PATCH] dmidecode: Add option to filter output based upon handle |
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Date: |
Fri, 29 Jun 2018 13:59:20 +0000 |
> -----Original Message-----
> From: Jean Delvare <address@hidden>
> Sent: Friday, June 29, 2018 4:09 AM
> To: Hoemann, Jerry <address@hidden>
> Cc: address@hidden; Elliott, Robert (Persistent Memory)
> <address@hidden>
> Subject: Re: [PATCH] dmidecode: Add option to filter output based
> upon handle
>
> Hi Jerry,
>
> On Thu, 28 Jun 2018 14:08:06 -0600, Jerry Hoemann wrote:
> > Add option "--handle HANDLE" to dmiopt to allow user to filter
> > ouput to only those entrie(s) that match HANDLE.
>
> I am curious what you need this feature for? Handle numbers are
> arbitrary and not portable, so it never occurred to me that someone
> could need to query for a specific handle.
The ACPI NFIT (NVDIMM Firmware Interface Table) reports the SMBIOS
handle of each NVDIMM (in a field called Physical ID). So, this
helps follow that to find the rest of the information about the
NVDIMM that is being provided by system firmware.
See https://patchwork.kernel.org/patch/9835987/.
Similarly, the ACPI PMTT (Platform Memory Topology Table) and HMAT
(Heterogeneous Memory Attribute Table) include SMBIOS handles for
the DIMMs whose attributes they are describing.
---
Robert Elliott, HPE Persistent Memory