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haswell: allow for disabled hyperthreading

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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>
This commit is contained in:
Aaron Durbin
2013-05-28 14:26:29 -05:00
committed by Ronald G. Minnich
parent 27435d3bcd
commit 66da043e48
3 changed files with 51 additions and 6 deletions
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3
src/cpu/intel/haswell/haswell.h
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@@ -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