diff options
| author | Andrew Morton <akpm@osdl.org> | 2003-09-21 01:40:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.osdl.org> | 2003-09-21 01:40:26 -0700 |
| commit | 3347917099cab2ab63cdb126af1b18c15df1d106 (patch) | |
| tree | ed42849aa1f8aea54c7b8127bf095d42b55098e9 /kernel | |
| parent | c5d9f06fd72704f560fe9b560ce51083cbcad20f (diff) | |
[PATCH] Summit sub-arch: Make logical IDs independent of BIOS numbering scheme
From: James Cleverdon <jamesclv@us.ibm.com>
In forthcoming IBM x445 systems, the physical APIC ID will not follow the
simple rule laid out by Intel and encoded into xapic_phys_to_log_apicid.
(The BIOS code that sets IDs doesn't work right above 16 CPUs if HT is turned
on, so for > 16-way the BIOS will disable HT and repack the physical CPUs
into APIC clusters.)
Anyway, it's a good idea to make the APIC code more independent of any
particular BIOS numbering scheme. This patch allocates logical IDs based on
how many CPUs have already been onlined in a particular APIC cluster.
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions