diff options
Diffstat (limited to 'arch/ppc64/kernel/pSeries_setup.c')
| -rw-r--r-- | arch/ppc64/kernel/pSeries_setup.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/pSeries_setup.c b/arch/ppc64/kernel/pSeries_setup.c index 849ed9ba785..3f3be8ae935 100644 --- a/arch/ppc64/kernel/pSeries_setup.c +++ b/arch/ppc64/kernel/pSeries_setup.c @@ -19,6 +19,7 @@ #undef DEBUG #include <linux/config.h> +#include <linux/cpu.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> @@ -82,6 +83,9 @@ int fwnmi_active; /* TRUE if an FWNMI handler is present */ extern void pSeries_system_reset_exception(struct pt_regs *regs); extern int pSeries_machine_check_exception(struct pt_regs *regs); +static int shared_idle(void); +static int dedicated_idle(void); + static volatile void __iomem * chrp_int_ack_special; struct mpic *pSeries_mpic; @@ -229,6 +233,20 @@ static void __init pSeries_setup_arch(void) if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) vpa_init(boot_cpuid); + + /* Choose an idle loop */ + if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) { + if (get_paca()->lppaca.shared_proc) { + printk(KERN_INFO "Using shared processor idle loop\n"); + ppc_md.idle_loop = shared_idle; + } else { + printk(KERN_INFO "Using dedicated idle loop\n"); + ppc_md.idle_loop = dedicated_idle; + } + } else { + printk(KERN_INFO "Using default idle loop\n"); + ppc_md.idle_loop = default_idle; + } } static int __init pSeries_init_panel(void) |