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arm64: enable processor debug state for secondary cpus

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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>
(cherry picked from commit d8ed442a00)
Signed-off-by: Mark Brown <broonie@linaro.org>

Conflicts:
	arch/arm64/kernel/smp.c
This commit is contained in:
Vijaya Kumar K
2014-02-21 05:13:49 +00:00
committed by Mark Brown
parent 7b1f792f1f
commit dabf5d44b1
2 changed files with 4 additions and 4 deletions
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7
arch/arm64/kernel/debug-monitors.c
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@@ -138,8 +138,6 @@ 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 __cpuinit os_lock_notify(struct notifier_block *self,
@@ -158,8 +156,9 @@ static struct notifier_block __cpuinitdata os_lock_nb = {
static int __cpuinit 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);

1
arch/arm64/kernel/smp.c
View File

@@ -159,6 +159,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
*/
notify_cpu_starting(cpu);
local_dbg_enable();
local_irq_enable();
local_fiq_enable();