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Commit fc82cf11 authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Alexander Graf
Browse files

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 avatarAlexander Graf <agraf@suse.de>
parent 95791988

arch/powerpc/include/asm/switch_to.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/kernel/process.c

+2 −1
Original line number Diff line number Diff line
@@ -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)