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authorAaron Durbin <adurbin@chromium.org>2014-11-05 11:19:21 -0600
committerPatrick Georgi <pgeorgi@google.com>2015-04-10 11:57:19 +0200
commit931a218d685610d85b570b72889b341270e2d00a (patch)
tree446329b3db54620b5342f1eea1f398e28112743a /src/arch/arm64
parent9fd7b1c1a9ab42b428af2599f497a328a04dbe92 (diff)
downloadcoreboot-931a218d685610d85b570b72889b341270e2d00a.tar.xz
arm64: secmon: pass online CPUs to secmon
Instead of relying on CONFIG_MAX_CPUS to be the number of CPUs running a platform pass the number of online cpus from coreboot secmon. That allows for actually enabled CPUs < CONFIG_MAX_CPUS. BUG=chrome-os-partner:32112 BRANCH=None TEST=Booted SMP kernel. Change-Id: Iaf1591e77fcb5ccf5fe271b6c84ea8866e19c59d Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 3827af876c247fc42cd6be5dd67f8517457b36e7 Original-Change-Id: Ice10b8ab45bb1190a42678e67776846eec4eb79a Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/227529 Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: http://review.coreboot.org/9397 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch/arm64')
-rw-r--r--src/arch/arm64/armv8/secmon/secmon_init.c20
-rw-r--r--src/arch/arm64/armv8/secmon_loader.c2
-rw-r--r--src/arch/arm64/cpu.c13
-rw-r--r--src/arch/arm64/include/armv8/arch/cpu.h3
-rw-r--r--src/arch/arm64/include/armv8/arch/secmon.h1
5 files changed, 23 insertions, 16 deletions
diff --git a/src/arch/arm64/armv8/secmon/secmon_init.c b/src/arch/arm64/armv8/secmon/secmon_init.c
index 9e104c759b..3405027f2f 100644
--- a/src/arch/arm64/armv8/secmon/secmon_init.c
+++ b/src/arch/arm64/armv8/secmon/secmon_init.c
@@ -58,22 +58,10 @@ static void cpu_init(int bsp)
cpu_set_bsp();
}
-static void wait_for_all_cpus(void)
+static void wait_for_all_cpus(size_t expected)
{
- 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;
- }
+ while (cpus_online() != expected)
+ ;
}
static void secmon_init(struct secmon_params *params, int bsp)
@@ -90,7 +78,7 @@ static void secmon_init(struct secmon_params *params, int bsp)
secmon_wait_for_action();
/* Wait for all CPUs to enter secmon. */
- wait_for_all_cpus();
+ wait_for_all_cpus(params->online_cpus);
smc_init();
psci_init();
diff --git a/src/arch/arm64/armv8/secmon_loader.c b/src/arch/arm64/armv8/secmon_loader.c
index 59a6ba7e6d..7a6e3ee738 100644
--- a/src/arch/arm64/armv8/secmon_loader.c
+++ b/src/arch/arm64/armv8/secmon_loader.c
@@ -116,6 +116,8 @@ static void fill_secmon_params(struct secmon_params *p,
memset(p, 0, sizeof(*p));
+ p->online_cpus = cpus_online();
+
spin_attrs = spintable_get_attributes();
if (spin_attrs != NULL) {
diff --git a/src/arch/arm64/cpu.c b/src/arch/arm64/cpu.c
index eb08735292..cd8dd3820a 100644
--- a/src/arch/arm64/cpu.c
+++ b/src/arch/arm64/cpu.c
@@ -32,6 +32,19 @@ struct cpu_info *cpu_info(void)
return cpu_info_for_cpu(smp_processor_id());
}
+size_t cpus_online(void)
+{
+ int i;
+ size_t num = 0;
+
+ for (i = 0; i < ARRAY_SIZE(cpu_infos); i++) {
+ if (cpu_online(cpu_info_for_cpu(i)))
+ num++;
+ }
+
+ return num;
+}
+
static inline int action_queue_empty(struct cpu_action_queue *q)
{
return load_acquire_exclusive(&q->todo) == NULL;
diff --git a/src/arch/arm64/include/armv8/arch/cpu.h b/src/arch/arm64/include/armv8/arch/cpu.h
index d4ff907495..c6ca7d38c6 100644
--- a/src/arch/arm64/include/armv8/arch/cpu.h
+++ b/src/arch/arm64/include/armv8/arch/cpu.h
@@ -99,6 +99,9 @@ static inline void cpu_mark_online(struct cpu_info *ci)
store_release(&ci->online, 1);
}
+/* Provide number of CPUs online. */
+size_t cpus_online(void);
+
/* Control routines for starting CPUs. */
struct cpu_control_ops {
/* Return the maximum number of CPUs supported. */
diff --git a/src/arch/arm64/include/armv8/arch/secmon.h b/src/arch/arm64/include/armv8/arch/secmon.h
index dc4b2e06ce..3d368a70e5 100644
--- a/src/arch/arm64/include/armv8/arch/secmon.h
+++ b/src/arch/arm64/include/armv8/arch/secmon.h
@@ -25,6 +25,7 @@
#if IS_ENABLED(CONFIG_ARCH_USE_SECURE_MONITOR)
struct secmon_params {
+ size_t online_cpus;
struct cpu_action bsp;
struct cpu_action secondary;
};