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Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index cd6622c3204e..0854ff169274 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -226,10 +226,12 @@ static int enable_start_cpu0; static void notrace start_secondary(void *unused) { /* - * Don't put *anything* before cpu_init(), SMP booting is too - * fragile that we want to limit the things done here to the - * most necessary things. + * Don't put *anything* except direct CPU state initialization + * before cpu_init(), SMP booting is too fragile that we want to + * limit the things done here to the most necessary things. */ + if (boot_cpu_has(X86_FEATURE_PCID)) + __write_cr4(__read_cr4() | X86_CR4_PCIDE); cpu_init(); x86_cpuinit.early_percpu_clock_init(); preempt_disable(); |