diff options
Diffstat (limited to 'include/asm-x86_64/ipi.h')
| -rw-r--r-- | include/asm-x86_64/ipi.h | 54 |
1 files changed, 32 insertions, 22 deletions
diff --git a/include/asm-x86_64/ipi.h b/include/asm-x86_64/ipi.h index ffa6f1517f1..26961e67194 100644 --- a/include/asm-x86_64/ipi.h +++ b/include/asm-x86_64/ipi.h @@ -74,10 +74,39 @@ static inline void __send_IPI_shortcut(unsigned int shortcut, int vector, unsign apic_write(APIC_ICR, cfg); } +/* + * This is used to send an IPI with no shorthand notation (the destination is + * specified in bits 56 to 63 of the ICR). + */ +static inline void __send_IPI_dest_field(unsigned int mask, int vector, unsigned int dest) +{ + unsigned long cfg; + + /* + * Wait for idle. + */ + apic_wait_icr_idle(); + + /* + * prepare target chip field + */ + cfg = __prepare_ICR2(mask); + apic_write(APIC_ICR2, cfg); + + /* + * program the ICR + */ + cfg = __prepare_ICR(0, vector, dest); + + /* + * Send the IPI. The write to APIC_ICR fires this off. + */ + apic_write(APIC_ICR, cfg); +} static inline void send_IPI_mask_sequence(cpumask_t mask, int vector) { - unsigned long cfg, flags; + unsigned long flags; unsigned long query_cpu; /* @@ -86,28 +115,9 @@ static inline void send_IPI_mask_sequence(cpumask_t mask, int vector) * - mbligh */ local_irq_save(flags); - for_each_cpu_mask(query_cpu, mask) { - /* - * Wait for idle. - */ - apic_wait_icr_idle(); - - /* - * prepare target chip field - */ - cfg = __prepare_ICR2(x86_cpu_to_apicid[query_cpu]); - apic_write(APIC_ICR2, cfg); - - /* - * program the ICR - */ - cfg = __prepare_ICR(0, vector, APIC_DEST_PHYSICAL); - - /* - * Send the IPI. The write to APIC_ICR fires this off. - */ - apic_write(APIC_ICR, cfg); + __send_IPI_dest_field(x86_cpu_to_apicid[query_cpu], + vector, APIC_DEST_PHYSICAL); } local_irq_restore(flags); } |