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-rw-r--r--src/cpu/x86/mp_init.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c
index 45776f8186..b093be7003 100644
--- a/src/cpu/x86/mp_init.c
+++ b/src/cpu/x86/mp_init.c
@@ -13,6 +13,7 @@
*/
#include <console/console.h>
+#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <rmodule.h>
@@ -518,11 +519,12 @@ static int bsp_do_flight_plan(struct mp_params *mp_params)
int i;
int ret = 0;
/*
- * Set time-out to wait for APs to a huge value (=1 second) since it
- * could take a longer time for APs to check-in as the number of APs
- * increases (contention for resources like UART also increases).
+ * Set time out for flight plan to a huge minimum value (>=1 second).
+ * CPUs with many APs may take longer if there is contention for
+ * resources such as UART, so scale the time out up by increments of
+ * 100ms if needed.
*/
- const int timeout_us = 1000000;
+ const int timeout_us = MAX(1000000, 100000 * mp_params->num_cpus);
const int step_us = 100;
int num_aps = mp_params->num_cpus - 1;
struct stopwatch sw;