On Fri, 2014-03-07 at 12:58 +0800, Chenhui Zhao wrote:
> diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
> index ac2621a..f3f4401 100644
> --- a/arch/powerpc/kernel/smp.c
> +++ b/arch/powerpc/kernel/smp.c
> @@ -405,8 +405,12 @@ void generic_cpu_die(unsigned int cpu)
>
> for (i = 0; i < 100; i++) {
> smp_rmb();
> - if (per_cpu(cpu_state, cpu) == CPU_DEAD)
> + if (per_cpu(cpu_state, cpu) == CPU_DEAD) {
> +#ifdef CONFIG_PPC64
> + paca[cpu].cpu_start = 0;
> +#endif
Why wasn't this needed by previous ppc64 machines?
> diff --git a/arch/powerpc/platforms/85xx/smp.c
> b/arch/powerpc/platforms/85xx/smp.c
> index 2e5911e..0047883 100644
> --- a/arch/powerpc/platforms/85xx/smp.c
> +++ b/arch/powerpc/platforms/85xx/smp.c
> @@ -19,6 +19,7 @@
> #include <linux/kexec.h>
> #include <linux/highmem.h>
> #include <linux/cpu.h>
> +#include <linux/smp.h>
>
> #include <asm/machdep.h>
> #include <asm/pgtable.h>
> @@ -46,6 +47,17 @@ static u64 timebase;
> static int tb_req;
> static int tb_valid;
>
> +#ifdef CONFIG_PPC_E500MC
> +/* specify the cpu PM state when cpu dies, PH15/NAP is the default */
> +int qoriq_cpu_die_state = E500_PM_PH15;
> +#endif
static? Is there any way to modify this other than modifying source
code?
BTW, QorIQ doesn't imply an e500mc derivative.
> @@ -125,6 +138,34 @@ static void mpc85xx_take_timebase(void)
> }
>
> #ifdef CONFIG_HOTPLUG_CPU
> +#ifdef CONFIG_PPC_E500MC
> +static void qoriq_cpu_die(void)
> +{
> + unsigned int cpu = smp_processor_id();
> +
> + local_irq_disable();
> +#ifdef CONFIG_PPC64
> + __hard_irq_disable();
> +#endif
Why this instead of one call to hard_irq_disable() (no leading
underscores)?
-Scott
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