sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cpu/x86/mp_init: remove adjust_cpu_apic_entry()

Browse Source 
The original purpose of adjust_cpu_apic_entry() was to set
up an APIC map. That map was effectively only used for mapping
*default* APIC id to CPU number in the SMM handler. The normal
AP startup path didn't need this mapping because it was whoever
won the race got the next cpu number. Instead of statically
calculating (and wrong) just initialize the default APIC id
map when the APs come online. Once the APs are online the SMM
handler is loaded and the mapping is utilized.

Change-Id: Idff3b8cfc17aef0729d3193b4499116a013b7930
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/21452
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
This commit is contained in:
Aaron Durbin
2017-09-07 21:17:33 -06:00
parent 0b80bd1cf4
commit 5a1f9a87cb
9 changed files with 19 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/cpu/intel/haswell/haswell_init.c
View File

@ -712,7 +712,6 @@ static void haswell_init(struct device *cpu)
/* MP initialization support. */
static const void *microcode_patch;
static int ht_disabled;
static void pre_mp_init(void)
{
@ -740,8 +739,6 @@ static int get_cpu_count(void)
printk(BIOS_DEBUG, "CPU has %u cores, %u threads enabled.\n",
num_cores, num_threads);
ht_disabled = num_threads == num_cores;
return num_threads;
}
@ -752,14 +749,6 @@ static void get_microcode_info(const void **microcode, int *parallel)
*parallel = 1;
}
static int adjust_apic_id(int index, int apic_id)
{
if (ht_disabled)
return 2 * index;
else
return index;
}
static void per_cpu_smm_trigger(void)
{
/* Relocate the SMM handler. */
@ -784,7 +773,6 @@ static const struct mp_ops mp_ops = {
.get_cpu_count = get_cpu_count,
.get_smm_info = smm_info,
.get_microcode_info = get_microcode_info,
.adjust_cpu_apic_entry = adjust_apic_id,
.pre_mp_smm_init = smm_initialize,
.per_cpu_smm_trigger = per_cpu_smm_trigger,
.relocation_handler = smm_relocation_handler,