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mp_init: Wait longer for APs to check in 

On IBM/SBP1 with 384 cores it takes a while for all APs
to check in. Use linear scaling instead of hardcoding an
arbitrary limit for the timeout.

Change-Id: If020a3fa985bfc7fd2f0aa836dc04e6647a1a450
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73369
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-by: TangYiwei
Reviewed-by: Naresh <naresh.solanki.2011@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Patrick Rudolph 2023-01-11 16:36:12 +01:00 committed by Felix Held
parent 559f9ed583
commit 7be147dfaa
1 changed files with 3 additions and 2 deletions
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5
src/cpu/x86/mp_init.c
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@ -432,7 +432,7 @@ static enum cb_err send_sipi_to_aps(int ap_count, atomic_t *num_aps, int sipi_ve
static enum cb_err start_aps(struct bus *cpu_bus, int ap_count, atomic_t *num_aps)
{
int sipi_vector;
int sipi_vector, total_delay;
/* Max location is 4KiB below 1MiB */
const int max_vector_loc = ((1 << 20) - (1 << 12)) >> 12;
@ -479,7 +479,8 @@ static enum cb_err start_aps(struct bus *cpu_bus, int ap_count, atomic_t *num_ap
return CB_ERR;
/* Wait for CPUs to check in. */
if (wait_for_aps(num_aps, ap_count, 400000 /* 400 ms */, 50 /* us */) != CB_SUCCESS) {
total_delay = 50000 * ap_count; /* 50 ms per AP */
if (wait_for_aps(num_aps, ap_count, total_delay, 50 /* us */) != CB_SUCCESS) {
printk(BIOS_ERR, "Not all APs checked in: %d/%d.\n",
atomic_read(num_aps), ap_count);
return CB_ERR;