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authorVijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>2014-02-21 05:13:49 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2014-02-26 11:16:27 +0000
commitd8ed442a009ecfe155b57d58f231db3d6084633d (patch)
tree44cc671e1c1893218bb1823ab7c13b8f4bbf7379 /arch/arm64
parent9529247db9ecfc5a723e17093614e7437ab0d5bd (diff)
downloadop-kernel-dev-d8ed442a009ecfe155b57d58f231db3d6084633d.zip
op-kernel-dev-d8ed442a009ecfe155b57d58f231db3d6084633d.tar.gz
arm64: enable processor debug state for secondary cpus
processor debug state PSTATE.D is unmasked in smp call clear_os_lock for secondary cpus. So debug state is still masked in normal kernel context. With this patch, unmask debug state on secondary boot for the cpus in normal kernel context. Now kgdb tests passed with multicore. Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/debug-monitors.c7
-rw-r--r--arch/arm64/kernel/smp.c1
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 1a8127d..13f87de 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -137,8 +137,6 @@ void disable_debug_monitors(enum debug_el el)
static void clear_os_lock(void *unused)
{
asm volatile("msr oslar_el1, %0" : : "r" (0));
- isb();
- local_dbg_enable();
}
static int os_lock_notify(struct notifier_block *self,
@@ -157,8 +155,9 @@ static struct notifier_block os_lock_nb = {
static int debug_monitors_init(void)
{
/* Clear the OS lock. */
- smp_call_function(clear_os_lock, NULL, 1);
- clear_os_lock(NULL);
+ on_each_cpu(clear_os_lock, NULL, 1);
+ isb();
+ local_dbg_enable();
/* Register hotplug handler. */
register_cpu_notifier(&os_lock_nb);
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 7cfb92a..5070dc3 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -160,6 +160,7 @@ asmlinkage void secondary_start_kernel(void)
set_cpu_online(cpu, true);
complete(&cpu_running);
+ local_dbg_enable();
local_irq_enable();
local_async_enable();
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