diff options
Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
-rw-r--r-- | arch/x86/kernel/apic/apic.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 770557110051..209c5052556d 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -101,6 +101,9 @@ static int apic_extnmi __ro_after_init = APIC_EXTNMI_BSP; */ static bool virt_ext_dest_id __ro_after_init; +/* For parallel bootup. */ +unsigned long apic_mmio_base __ro_after_init; + /* * Map cpu index to physical APIC ID */ @@ -2163,6 +2166,7 @@ void __init register_lapic_address(unsigned long address) if (!x2apic_mode) { set_fixmap_nocache(FIX_APIC_BASE, address); + apic_mmio_base = APIC_BASE; apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n", APIC_BASE, address); } @@ -2376,7 +2380,7 @@ static int nr_logical_cpuids = 1; /* * Used to store mapping between logical CPU IDs and APIC IDs. */ -static int cpuid_to_apicid[] = { +int cpuid_to_apicid[] = { [0 ... NR_CPUS - 1] = -1, }; @@ -2386,20 +2390,16 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id) } #ifdef CONFIG_SMP -/** - * apic_id_is_primary_thread - Check whether APIC ID belongs to a primary thread - * @apicid: APIC ID to check - */ -bool apic_id_is_primary_thread(unsigned int apicid) +static void cpu_mark_primary_thread(unsigned int cpu, unsigned int apicid) { - u32 mask; - - if (smp_num_siblings == 1) - return true; /* Isolate the SMT bit(s) in the APICID and check for 0 */ - mask = (1U << (fls(smp_num_siblings) - 1)) - 1; - return !(apicid & mask); + u32 mask = (1U << (fls(smp_num_siblings) - 1)) - 1; + + if (smp_num_siblings == 1 || !(apicid & mask)) + cpumask_set_cpu(cpu, &__cpu_primary_thread_mask); } +#else +static inline void cpu_mark_primary_thread(unsigned int cpu, unsigned int apicid) { } #endif /* @@ -2544,6 +2544,8 @@ int generic_processor_info(int apicid, int version) set_cpu_present(cpu, true); num_processors++; + cpu_mark_primary_thread(cpu, apicid); + return cpu; } |