On 03/03/09 15:34, Cynthia McGuire wrote:
Tom Pothier wrote:
Hi Cindi,
This is using the SMBIOS and/or ACPI for fru topology information.
The "PRI like structure" only becomes intermediate data that then can
be walked by a common back end walker. All FRU information (serial
number, part number, etc...) is retrieved from (mostly) SMBIOS and
then placed into a PRI like structure for the topology to be generated.
There is no "firmware" generated PRI like entity, and we're not
proposing one. We're generating the x86 PRI only so we could reuse
the sun4pi walker (to generate the FMA topology). Otherwise we'd have
to come up with an entirely x86 specific data format and walker...
Does this make more sense?
No. libtopo should be getting its SMBIOS information directly from
libsmbios. I see no motivation in your spec for an intermediate
layer. What limitations in libsmbios or libtopo are forcing you to
model this information using the PRI.
Using the PRI intermediate layer allows us to enumerate a topology that
contains multiple base boards, chassis', or both. With the use of
contained object handles within the SMBIOS we can derive the parent <->
child relationship correctly within the PRI structure. We'll also be
matching ereport generation with the topology even before a topology
proper can be generated (ie: during boot).
Currently we plan to use the PRI to only enumerate to the base board
level; then call chip.so to enumerate chip/core/strand and memory topology.
-t
Cindi
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While I'm happy to see some convergence between x86 and SPARC, this
project moves in the wrong direction. If I understand correctly,
you are adopting the SPARC PRI for modeling the FMA topology on
x86. This has been discussed before and it was decided that a
better approach for all Sun platforms is to move toward adopting
SMBIOS. SMBIOS (plus whatever you glean from ACPI) then becomes the
source of FRU and other FMA topology information for things like
libtopo and fmd(1M). Further, Sun needs to draft a SMBIOS standard
for platform vendors wishing to participate in fault management and
diagnosis for their platforms. Included in the standard should be
the required records for the Sun FMA. If a vendor conforms
(including Sun SPARC), diagnosis and FRU location and replacement is
then guaranteed.
Cindi
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