Re: [PATCH] powerpc: export debug register save function for KVM

Alexander Graf
2013-05-10T09:15:29Z

On 07.05.2013, at 11:40, 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@freescale.com>
> ---
> arch/powerpc/include/asm/switch_to.h | 4 ++++
> arch/powerpc/kernel/process.c | 3 ++-
> 2 files changed, 6 insertions(+), 1 deletions(-)
>
> 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 ca89375..a938138 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(switch_booke_debug_regs);

EXPORT_SYMBOL_GPL

Alex