From: Bharat Bhushan Date: Thu, 4 Jul 2013 06:57:44 +0000 (+0530) Subject: powerpc: export debug registers save function for KVM X-Git-Tag: v3.13-rc1~20^2~54^2~27 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3743c9b8ceb638b6e4b78b42f2262e22aa6359f0;p=platform%2Fkernel%2Flinux-stable.git 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 Acked-by: Michael Neuling Signed-off-by: Scott Wood --- diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index 2be5618..9ee1261 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -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); diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 3db9d7e..4d42c4d 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -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)