[PATCH 1/4 v6] powerpc: export debug registers save function for KVM

[Alexander Graf]

On 04.07.2013, at 08:57, Bharat Bhushan wrote:

> 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 at freescale.com>

Ben / Michael, please ack.


Alex

> ---
> v5->v6
> - switch_booke_debug_regs() not guarded by the compiler switch
> 
> arch/powerpc/include/asm/switch_to.h |    1 +
> arch/powerpc/kernel/process.c        |    3 ++-
> 2 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
> index 200d763..db68f1d 100644
> --- a/arch/powerpc/include/asm/switch_to.h
> +++ b/arch/powerpc/include/asm/switch_to.h
> @@ -29,6 +29,7 @@ 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 01ff496..da586aa 100644
> --- a/arch/powerpc/kernel/process.c
> +++ b/arch/powerpc/kernel/process.c
> @@ -362,12 +362,13 @@ 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)
> -- 
> 1.7.0.4
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html