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>
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c
index 8c48f90..8301e80 100644
--- a/src/cpu/x86/mp_init.c
+++ b/src/cpu/x86/mp_init.c
@@ -432,7 +432,7 @@
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 @@
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;