diff options
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index c8b39870f33e..c9176bae7fd8 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -168,6 +168,24 @@ static int __init x86_mpx_setup(char *s) } __setup("nompx", x86_mpx_setup); +#ifdef CONFIG_X86_64 +static int __init x86_nopcid_setup(char *s) +{ + /* nopcid doesn't accept parameters */ + if (s) + return -EINVAL; + + /* do not emit a message if the feature is not present */ + if (!boot_cpu_has(X86_FEATURE_PCID)) + return 0; + + setup_clear_cpu_cap(X86_FEATURE_PCID); + pr_info("nopcid: PCID feature disabled\n"); + return 0; +} +early_param("nopcid", x86_nopcid_setup); +#endif + static int __init x86_noinvpcid_setup(char *s) { /* noinvpcid doesn't accept parameters */ @@ -886,6 +904,14 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c) setup_force_cpu_cap(X86_FEATURE_ALWAYS); fpu__init_system(c); + +#ifdef CONFIG_X86_32 + /* + * Regardless of whether PCID is enumerated, the SDM says + * that it can't be enabled in 32-bit mode. + */ + setup_clear_cpu_cap(X86_FEATURE_PCID); +#endif } void __init early_cpu_init(void) @@ -1289,15 +1315,6 @@ static __init int setup_disablecpuid(char *arg) __setup("clearcpuid=", setup_disablecpuid); #ifdef CONFIG_X86_64 -struct desc_ptr idt_descr __ro_after_init = { - .size = NR_VECTORS * 16 - 1, - .address = (unsigned long) idt_table, -}; -const struct desc_ptr debug_idt_descr = { - .size = NR_VECTORS * 16 - 1, - .address = (unsigned long) debug_idt_table, -}; - DEFINE_PER_CPU_FIRST(union irq_stack_union, irq_stack_union) __aligned(PAGE_SIZE) __visible; @@ -1552,6 +1569,7 @@ void cpu_init(void) mmgrab(&init_mm); me->active_mm = &init_mm; BUG_ON(me->mm); + initialize_tlbstate_and_flush(); enter_lazy_tlb(&init_mm, me); load_sp0(t, ¤t->thread); @@ -1606,6 +1624,7 @@ void cpu_init(void) mmgrab(&init_mm); curr->active_mm = &init_mm; BUG_ON(curr->mm); + initialize_tlbstate_and_flush(); enter_lazy_tlb(&init_mm, curr); load_sp0(t, thread); |
