diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2013-05-28 14:26:29 -0500 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-06-03 17:30:48 +0200 |
| commit | 66da043e48c65e6d89b385d840e5f7c53e482db9 (patch) | |
| tree | 08a1e3acfa427d8c8d71b417a6cd15554248a25a /src/cpu/intel/haswell/haswell.h | |
| parent | 27435d3bcdd4c7bccb326f77ca64a54d3fb1170a (diff) | |
haswell: allow for disabled hyperthreading
There were assumptions being made in the haswell
MP and SMM code which assumed the APIC id space
was 1:1 w.r.t. cpu number. When hyperthreading is
disabled the APIC ids of the logical processors
are all even. That means the APIC id space is sparse.
Handle this situation.
Change-Id: Ibe79ab156c0a171208a77db8a252aa5b73205d6c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/3353
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu/intel/haswell/haswell.h')
| -rw-r--r-- | src/cpu/intel/haswell/haswell.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cpu/intel/haswell/haswell.h b/src/cpu/intel/haswell/haswell.h index c550cfa1a6..4a739a9e30 100644 --- a/src/cpu/intel/haswell/haswell.h +++ b/src/cpu/intel/haswell/haswell.h @@ -175,6 +175,9 @@ int setup_ap_init(struct bus *cpu_bus, int *max_cpus, /* Returns 0 on success, < 0 on failure. */ int start_aps(struct bus *cpu_bus, int max_cpus); void release_aps_for_smm_relocation(int do_parallel_relocation); +/* Determine if HyperThreading is disabled. The variable is not valid until + * setup_ap_init() has been called. */ +extern int ht_disabled; #endif /* This structure is saved along with the relocated ramstage program in SMM |