diff options
Diffstat (limited to 'arch/x86/kernel/genx2apic_cluster.c')
| -rw-r--r-- | arch/x86/kernel/genx2apic_cluster.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/arch/x86/kernel/genx2apic_cluster.c b/arch/x86/kernel/genx2apic_cluster.c deleted file mode 100644 index 6ce497cc372d..000000000000 --- a/arch/x86/kernel/genx2apic_cluster.c +++ /dev/null @@ -1,198 +0,0 @@ -#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/ipi.h> -#include <asm/genapic.h> - -DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid); - -static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) -{ - if (cpu_has_x2apic) - return 1; - - return 0; -} - -/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ - -static const struct cpumask *x2apic_target_cpus(void) -{ - return cpumask_of(0); -} - -/* - * for now each logical cpu is in its own vector allocation domain. - */ -static void x2apic_vector_allocation_domain(int cpu, struct cpumask *retmask) -{ - cpumask_clear(retmask); - cpumask_set_cpu(cpu, retmask); -} - -static void __x2apic_send_IPI_dest(unsigned int apicid, int vector, - unsigned int dest) -{ - unsigned long cfg; - - cfg = __prepare_ICR(0, vector, dest); - - /* - * send the IPI. - */ - x2apic_icr_write(cfg, apicid); -} - -/* - * for now, we send the IPI's one by one in the cpumask. - * TBD: Based on the cpu mask, we can send the IPI's to the cluster group - * at once. We have 16 cpu's in a cluster. This will minimize IPI register - * writes. - */ -static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector) -{ - unsigned long flags; - unsigned long query_cpu; - - local_irq_save(flags); - for_each_cpu(query_cpu, mask) - __x2apic_send_IPI_dest( - per_cpu(x86_cpu_to_logical_apicid, query_cpu), - vector, APIC_DEST_LOGICAL); - local_irq_restore(flags); -} - -static void x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, - int vector) -{ - unsigned long flags; - unsigned long query_cpu; - unsigned long this_cpu = smp_processor_id(); - - local_irq_save(flags); - for_each_cpu(query_cpu, mask) - if (query_cpu != this_cpu) - __x2apic_send_IPI_dest( - per_cpu(x86_cpu_to_logical_apicid, query_cpu), - vector, APIC_DEST_LOGICAL); - local_irq_restore(flags); -} - -static void x2apic_send_IPI_allbutself(int vector) -{ - unsigned long flags; - unsigned long query_cpu; - unsigned long this_cpu = smp_processor_id(); - - local_irq_save(flags); - for_each_online_cpu(query_cpu) - if (query_cpu != this_cpu) - __x2apic_send_IPI_dest( - per_cpu(x86_cpu_to_logical_apicid, query_cpu), - vector, APIC_DEST_LOGICAL); - local_irq_restore(flags); -} - -static void x2apic_send_IPI_all(int vector) -{ - x2apic_send_IPI_mask(cpu_online_mask, vector); -} - -static int x2apic_apic_id_registered(void) -{ - return 1; -} - -static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask *cpumask) -{ - int cpu; - - /* - * We're using fixed IRQ delivery, can only return one logical APIC ID. - * May as well be the first. - */ - cpu = cpumask_first(cpumask); - if ((unsigned)cpu < nr_cpu_ids) - return per_cpu(x86_cpu_to_logical_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 logical APIC ID. - * May as well be the first. - */ - for_each_cpu_and(cpu, cpumask, andmask) - if (cpumask_test_cpu(cpu, cpu_online_mask)) - break; - if (cpu < nr_cpu_ids) - return per_cpu(x86_cpu_to_logical_apicid, cpu); - return BAD_APICID; -} - -static unsigned int get_apic_id(unsigned long x) -{ - unsigned int id; - - id = x; - return id; -} - -static unsigned long set_apic_id(unsigned int id) -{ - unsigned long x; - - x = id; - return x; -} - -static unsigned int phys_pkg_id(int index_msb) -{ - return current_cpu_data.initial_apicid >> index_msb; -} - -static void x2apic_send_IPI_self(int vector) -{ - apic_write(APIC_SELF_IPI, vector); -} - -static void init_x2apic_ldr(void) -{ - int cpu = smp_processor_id(); - - per_cpu(x86_cpu_to_logical_apicid, cpu) = apic_read(APIC_LDR); - return; -} - -struct genapic apic_x2apic_cluster = { - .name = "cluster x2apic", - .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, - .int_delivery_mode = dest_LowestPrio, - .int_dest_mode = (APIC_DEST_LOGICAL != 0), - .target_cpus = x2apic_target_cpus, - .vector_allocation_domain = x2apic_vector_allocation_domain, - .apic_id_registered = x2apic_apic_id_registered, - .init_apic_ldr = init_x2apic_ldr, - .send_IPI_all = x2apic_send_IPI_all, - .send_IPI_allbutself = x2apic_send_IPI_allbutself, - .send_IPI_mask = x2apic_send_IPI_mask, - .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself, - .send_IPI_self = x2apic_send_IPI_self, - .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid, - .cpu_mask_to_apicid_and = x2apic_cpu_mask_to_apicid_and, - .phys_pkg_id = phys_pkg_id, - .get_apic_id = get_apic_id, - .set_apic_id = set_apic_id, - .apic_id_mask = (0xFFFFFFFFu), -}; |