diff options
Diffstat (limited to 'arch/x86/kernel/apic/x2apic_phys.c')
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_phys.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c new file mode 100644 index 00000000..991e315f --- /dev/null +++ b/arch/x86/kernel/apic/x2apic_phys.c @@ -0,0 +1,181 @@ +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/dmar.h> + +#include <asm/smp.h> +#include <asm/x2apic.h> + +int x2apic_phys; + +static struct apic apic_x2apic_phys; + +static int set_x2apic_phys_mode(char *arg) +{ + x2apic_phys = 1; + return 0; +} +early_param("x2apic_phys", set_x2apic_phys_mode); + +static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +{ + if (x2apic_phys) + return x2apic_enabled(); + else if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) && + (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL) && + x2apic_enabled()) { + printk(KERN_DEBUG "System requires x2apic physical mode\n"); + return 1; + } + else + return 0; +} + +static void +__x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest) +{ + unsigned long query_cpu; + unsigned long this_cpu; + unsigned long flags; + + x2apic_wrmsr_fence(); + + local_irq_save(flags); + + this_cpu = smp_processor_id(); + for_each_cpu(query_cpu, mask) { + if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu) + continue; + __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu), + vector, APIC_DEST_PHYSICAL); + } + local_irq_restore(flags); +} + +static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector) +{ + __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC); +} + +static void + x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector) +{ + __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT); +} + +static void x2apic_send_IPI_allbutself(int vector) +{ + __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT); +} + +static void x2apic_send_IPI_all(int vector) +{ + __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC); +} + +static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask *cpumask) +{ + /* + * We're using fixed IRQ delivery, can only return one phys APIC ID. + * May as well be the first. + */ + int cpu = cpumask_first(cpumask); + + if ((unsigned)cpu < nr_cpu_ids) + return per_cpu(x86_cpu_to_apicid, cpu); + else + return BAD_APICID; +} + +static unsigned int +x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask, + const struct cpumask *andmask) +{ + int cpu; + + /* + * We're using fixed IRQ delivery, can only return one phys APIC ID. + * May as well be the first. + */ + for_each_cpu_and(cpu, cpumask, andmask) { + if (cpumask_test_cpu(cpu, cpu_online_mask)) + break; + } + + return per_cpu(x86_cpu_to_apicid, cpu); +} + +static void init_x2apic_ldr(void) +{ +} + +static int x2apic_phys_probe(void) +{ + if (x2apic_mode && x2apic_phys) + return 1; + + return apic == &apic_x2apic_phys; +} + +static struct apic apic_x2apic_phys = { + + .name = "physical x2apic", + .probe = x2apic_phys_probe, + .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, + .apic_id_valid = x2apic_apic_id_valid, + .apic_id_registered = x2apic_apic_id_registered, + + .irq_delivery_mode = dest_Fixed, + .irq_dest_mode = 0, /* physical */ + + .target_cpus = x2apic_target_cpus, + .disable_esr = 0, + .dest_logical = 0, + .check_apicid_used = NULL, + .check_apicid_present = NULL, + + .vector_allocation_domain = x2apic_vector_allocation_domain, + .init_apic_ldr = init_x2apic_ldr, + + .ioapic_phys_id_map = NULL, + .setup_apic_routing = NULL, + .multi_timer_check = NULL, + .cpu_present_to_apicid = default_cpu_present_to_apicid, + .apicid_to_cpu_present = NULL, + .setup_portio_remap = NULL, + .check_phys_apicid_present = default_check_phys_apicid_present, + .enable_apic_mode = NULL, + .phys_pkg_id = x2apic_phys_pkg_id, + .mps_oem_check = NULL, + + .get_apic_id = x2apic_get_apic_id, + .set_apic_id = x2apic_set_apic_id, + .apic_id_mask = 0xFFFFFFFFu, + + .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid, + .cpu_mask_to_apicid_and = x2apic_cpu_mask_to_apicid_and, + + .send_IPI_mask = x2apic_send_IPI_mask, + .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself, + .send_IPI_allbutself = x2apic_send_IPI_allbutself, + .send_IPI_all = x2apic_send_IPI_all, + .send_IPI_self = x2apic_send_IPI_self, + + .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW, + .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH, + .wait_for_init_deassert = NULL, + .smp_callin_clear_local_apic = NULL, + .inquire_remote_apic = NULL, + + .read = native_apic_msr_read, + .write = native_apic_msr_write, + .icr_read = native_x2apic_icr_read, + .icr_write = native_x2apic_icr_write, + .wait_icr_idle = native_x2apic_wait_icr_idle, + .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle, +}; + +apic_driver(apic_x2apic_phys); |