151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/dmar.h>
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#include <asm/smp.h>
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#include <asm/x2apic.h>
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int x2apic_phys;
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static struct apic apic_x2apic_phys;
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static int set_x2apic_phys_mode(char *arg)
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{
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x2apic_phys = 1;
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return 0;
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}
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early_param("x2apic_phys", set_x2apic_phys_mode);
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static bool x2apic_fadt_phys(void)
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{
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#ifdef CONFIG_ACPI
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if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
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(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
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printk(KERN_DEBUG "System requires x2apic physical mode\n");
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return true;
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}
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#endif
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return false;
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}
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static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys());
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}
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static void x2apic_send_IPI(int cpu, int vector)
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{
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u32 dest = per_cpu(x86_cpu_to_apicid, cpu);
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x2apic_wrmsr_fence();
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__x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL);
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}
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static void
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__x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
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{
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unsigned long query_cpu;
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unsigned long this_cpu;
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unsigned long flags;
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x2apic_wrmsr_fence();
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local_irq_save(flags);
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this_cpu = smp_processor_id();
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for_each_cpu(query_cpu, mask) {
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if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu)
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continue;
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__x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu),
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vector, APIC_DEST_PHYSICAL);
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}
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local_irq_restore(flags);
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}
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static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector)
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{
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__x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC);
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}
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static void
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x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
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{
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__x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT);
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}
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static void x2apic_send_IPI_allbutself(int vector)
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{
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__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT);
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}
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static void x2apic_send_IPI_all(int vector)
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{
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__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
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}
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static void init_x2apic_ldr(void)
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{
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}
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static int x2apic_phys_probe(void)
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{
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if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
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return 1;
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return apic == &apic_x2apic_phys;
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}
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static struct apic apic_x2apic_phys __ro_after_init = {
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.name = "physical x2apic",
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.probe = x2apic_phys_probe,
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.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
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.apic_id_valid = x2apic_apic_id_valid,
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.apic_id_registered = x2apic_apic_id_registered,
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.irq_delivery_mode = dest_Fixed,
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.irq_dest_mode = 0, /* physical */
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.target_cpus = online_target_cpus,
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.disable_esr = 0,
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.dest_logical = 0,
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.check_apicid_used = NULL,
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.vector_allocation_domain = default_vector_allocation_domain,
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.init_apic_ldr = init_x2apic_ldr,
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.ioapic_phys_id_map = NULL,
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.setup_apic_routing = NULL,
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.cpu_present_to_apicid = default_cpu_present_to_apicid,
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.apicid_to_cpu_present = NULL,
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.check_phys_apicid_present = default_check_phys_apicid_present,
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.phys_pkg_id = x2apic_phys_pkg_id,
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.get_apic_id = x2apic_get_apic_id,
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.set_apic_id = x2apic_set_apic_id,
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.cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
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.send_IPI = x2apic_send_IPI,
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.send_IPI_mask = x2apic_send_IPI_mask,
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.send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself,
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.send_IPI_allbutself = x2apic_send_IPI_allbutself,
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.send_IPI_all = x2apic_send_IPI_all,
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.send_IPI_self = x2apic_send_IPI_self,
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.inquire_remote_apic = NULL,
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.read = native_apic_msr_read,
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.write = native_apic_msr_write,
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.eoi_write = native_apic_msr_eoi_write,
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.icr_read = native_x2apic_icr_read,
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.icr_write = native_x2apic_icr_write,
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.wait_icr_idle = native_x2apic_wait_icr_idle,
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.safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
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};
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apic_driver(apic_x2apic_phys);
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