diff options
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 1d33e817ab2d..3d7a50a08f5e 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -195,6 +195,18 @@ static void fixup_boot_paca(void) get_paca()->data_offset = 0; } +static void cpu_ready_for_interrupts(void) +{ + /* Set IR and DR in PACA MSR */ + get_paca()->kernel_msr = MSR_KERNEL; + + /* Enable AIL if supported */ + if (cpu_has_feature(CPU_FTR_ARCH_207S)) { + unsigned long lpcr = mfspr(SPRN_LPCR); + mtspr(SPRN_LPCR, lpcr | LPCR_AIL_3); + } +} + /* * Early initialization entry point. This is called by head.S * with MMU translation disabled. We rely on the "feature" of @@ -264,9 +276,9 @@ void __init early_setup(unsigned long dt_ptr) /* * At this point, we can let interrupts switch to virtual mode * (the MMU has been setup), so adjust the MSR in the PACA to - * have IR and DR set. + * have IR and DR set and enable AIL if it exists */ - get_paca()->kernel_msr = MSR_KERNEL; + cpu_ready_for_interrupts(); /* Reserve large chunks of memory for use by CMA for KVM */ kvm_cma_reserve(); @@ -307,7 +319,7 @@ void early_setup_secondary(void) * (the MMU has been setup), so adjust the MSR in the PACA to * have IR and DR set. */ - get_paca()->kernel_msr = MSR_KERNEL; + cpu_ready_for_interrupts(); } #endif /* CONFIG_SMP */ |