[coreboot-gerrit] Change in coreboot[master]: Make MP init timeout configurable

[Jonathan Zhang (Code Review)]

Jonathan Zhang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38546 )

Change subject: Make MP init timeout configurable
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Make MP init timeout configurable

The current MP init timeout is hardcoded as 1s. To support Intel
Xeon scalable processor, the timeout needs to be adjusted.

This patch makes MP init timeout configurable.

Signed-off-by: Jonathan Zhang 
Signed-off-by: Reddy Chagam 
Change-Id: Ibc079fc6aa8641d4ac8d8e726899b6c8d055052e
---
M src/cpu/x86/Kconfig
M src/cpu/x86/mp_init.c
2 files changed, 7 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/38546/1

diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig
index 76446a0..eedd2e6 100644
--- a/src/cpu/x86/Kconfig
+++ b/src/cpu/x86/Kconfig
@@ -184,3 +184,9 @@
    help
      The SoC requires different access methods for reading and writing
      the MSRs.  Use SoC specific routines to handle the MSR access.
+
+config FLIGHT_PLAN_TIMEOUT_US
+	int
+	default 1000000
+	help
+		Time-out (in micro seconds) to wait for APs to check-in
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c
index 45776f8..e874931 100644
--- a/src/cpu/x86/mp_init.c
+++ b/src/cpu/x86/mp_init.c
@@ -522,7 +522,7 @@
     * could take a longer time for APs to check-in as the number of APs
     * increases (contention for resources like UART also increases).
     */
-	const int timeout_us = 1000000;
+	const int timeout_us = CONFIG_FLIGHT_PLAN_TIMEOUT_US;
    const int step_us = 100;
    int num_aps = mp_params->num_cpus - 1;
    struct stopwatch sw;