From f793d432b9ef562c1a609261faf627d5936d9331 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Wed, 5 Nov 2014 10:23:33 -0600 Subject: arm64: secmon: wait for all CPUs to enter secmon There is state within the system that relies on having all CPUs present in order to proceed with initialization. The current expectation is that all CPUs are online and entering the secure monitor. Therefore, wait until all CONFIG_MAX_CPUs show up. BUG=chrome-os-partner:32112 BRANCH=None TEST=Can get all CPUs up in kernel using PSCI. Change-Id: I741a09128e99e0cb0c9f4046b1c0d27582fda963 Signed-off-by: Patrick Georgi Original-Commit-Id: 030535b7c9821b40bf4a51f88e289eab8af9aa13 Original-Change-Id: Ia0f744c93766efc694b522ab0af9aedf7329ac43 Original-Signed-off-by: Aaron Durbin Original-Reviewed-on: https://chromium-review.googlesource.com/227547 Original-Reviewed-by: Furquan Shaikh Reviewed-on: http://review.coreboot.org/9394 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/arch/arm64/armv8/secmon/secmon_init.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/arch/arm64') diff --git a/src/arch/arm64/armv8/secmon/secmon_init.c b/src/arch/arm64/armv8/secmon/secmon_init.c index 2ec2f136f7..fb3422f48b 100644 --- a/src/arch/arm64/armv8/secmon/secmon_init.c +++ b/src/arch/arm64/armv8/secmon/secmon_init.c @@ -53,6 +53,24 @@ static void cpu_init(int bsp) cpu_set_bsp(); } +static void wait_for_all_cpus(void) +{ + int all_online; + + while (1) { + int i; + + all_online = 1; + for (i = 0; i < CONFIG_MAX_CPUS; i++) { + if (!cpu_online(cpu_info_for_cpu(i))) + all_online = 0; + } + + if (all_online) + break; + } +} + static void secmon_init(struct secmon_params *params, int bsp) { struct cpu_action action = { @@ -67,6 +85,9 @@ static void secmon_init(struct secmon_params *params, int bsp) if (!cpu_is_bsp()) secmon_wait_for_action(); + /* Wait for all CPUs to enter secmon. */ + wait_for_all_cpus(); + smc_init(); psci_init(); -- cgit v1.2.3