From c86b102243a0b000bb7fef6373216e305b470947 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Mon, 8 Apr 2013 00:32:17 +0000 Subject: powerpc: export debug register 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 Signed-off-by: Stuart Yoder diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index 200d763..50b357f 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -30,6 +30,10 @@ extern void enable_kernel_spe(void); extern void giveup_spe(struct task_struct *); extern void load_up_spe(struct task_struct *); +#ifdef CONFIG_PPC_ADV_DEBUG_REGS +extern void switch_booke_debug_regs(struct thread_struct *new_thread); +#endif + #ifndef CONFIG_SMP extern void discard_lazy_cpu_state(void); #else diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 8143067..5f3d9db 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -354,12 +354,13 @@ 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.dbcr0 & DBCR0_IDM) || (new_thread->dbcr0 & DBCR0_IDM)) prime_debug_regs(new_thread); } +EXPORT_SYMBOL(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) -- cgit v0.10.2