POWERPC_PMC_KERNEL_ENABLE
config |= POWERPC_PMC_KERNEL_ENABLE;
if (config & POWERPC_PMC_KERNEL_ENABLE)
config |= POWERPC_PMC_KERNEL_ENABLE;
#define POWERPC_PMC_ENABLE (POWERPC_PMC_KERNEL_ENABLE | POWERPC_PMC_USER_ENABLE)