| Message ID | 1415102525-9898-7-git-send-email-jiang.liu@linux.intel.com |
|---|---|
| State | Not Applicable |
| Headers | show |
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 7624fffc2822..3d51d74d6c01 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -116,6 +116,7 @@ struct irq_data; struct irq_cfg { cpumask_var_t domain; cpumask_var_t old_domain; + unsigned int dest_apicid; u8 vector; u8 move_in_progress : 1; #ifdef CONFIG_IRQ_REMAP diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 5ac840a4cc53..02cb5d386985 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -188,6 +188,12 @@ next: } free_cpumask_var(tmp_mask); + if (!err) { + /* cache destination APIC IDs into cfg->dest_apicid */ + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, + &cfg->dest_apicid); + } + return err; }
Cache destination CPU APIC ID into struct irq_cfg when assigning vector for interrupt. Upper layer just needs to read the cached APIC ID instead of calling apic->cpu_mask_to_apicid_and(), it helps to hide APIC driver details from IOAPIC/HPET/MSI drivers.. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> --- arch/x86/include/asm/hw_irq.h | 1 + arch/x86/kernel/apic/vector.c | 6 ++++++ 2 files changed, 7 insertions(+)