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: Bharat Bhushan <bharat.bhushan@freescale.com> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Scott Wood <scottwood@freescale.com>
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@ -35,6 +35,7 @@ extern void giveup_vsx(struct task_struct *);
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extern void enable_kernel_spe(void);
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extern void giveup_spe(struct task_struct *);
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extern void load_up_spe(struct task_struct *);
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extern void switch_booke_debug_regs(struct thread_struct *new_thread);
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#ifndef CONFIG_SMP
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extern void discard_lazy_cpu_state(void);
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@ -371,12 +371,13 @@ static void prime_debug_regs(struct thread_struct *thread)
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* debug registers, set the debug registers from the values
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* stored in the new thread.
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*/
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static void switch_booke_debug_regs(struct thread_struct *new_thread)
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void switch_booke_debug_regs(struct thread_struct *new_thread)
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{
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if ((current->thread.debug.dbcr0 & DBCR0_IDM)
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|| (new_thread->debug.dbcr0 & DBCR0_IDM))
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prime_debug_regs(new_thread);
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}
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EXPORT_SYMBOL_GPL(switch_booke_debug_regs);
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#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
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#ifndef CONFIG_HAVE_HW_BREAKPOINT
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static void set_debug_reg_defaults(struct thread_struct *thread)
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