Commit 3743c9b8 authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Scott Wood

powerpc: export debug registers save function for KVM

KVM need this function when switching from vcpu to user-space
thread. My subsequent patch will use this function.
Signed-off-by: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent 51ae8d4a
......@@ -35,6 +35,7 @@ extern void giveup_vsx(struct task_struct *);
extern void enable_kernel_spe(void);
extern void giveup_spe(struct task_struct *);
extern void load_up_spe(struct task_struct *);
extern void switch_booke_debug_regs(struct thread_struct *new_thread);
#ifndef CONFIG_SMP
extern void discard_lazy_cpu_state(void);
......
......@@ -371,12 +371,13 @@ static void prime_debug_regs(struct thread_struct *thread)
* debug registers, set the debug registers from the values
* stored in the new thread.
*/
static void switch_booke_debug_regs(struct thread_struct *new_thread)
void switch_booke_debug_regs(struct thread_struct *new_thread)
{
if ((current->thread.debug.dbcr0 & DBCR0_IDM)
|| (new_thread->debug.dbcr0 & DBCR0_IDM))
prime_debug_regs(new_thread);
}
EXPORT_SYMBOL_GPL(switch_booke_debug_regs);
#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
#ifndef CONFIG_HAVE_HW_BREAKPOINT
static void set_debug_reg_defaults(struct thread_struct *thread)
......
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