static int xen_smp_intr_init(unsigned int cpu)
{
int rc;
const char *resched_name, *callfunc_name, *debug_name;
resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR,
cpu,
xen_reschedule_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
resched_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(resched_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR,
cpu,
xen_call_function_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(callfunc_irq, cpu) = rc;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
IRQF_DISABLED | IRQF_PERCPU | IRQF_NOBALANCING,
debug_name, NULL);
if (rc < 0)
goto fail;
per_cpu(debug_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
cpu,
xen_call_function_single_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(callfuncsingle_irq, cpu) = rc;
return 0;
fail:
if (per_cpu(resched_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
if (per_cpu(callfunc_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
if (per_cpu(debug_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
if (per_cpu(callfuncsingle_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
return rc;
}
int xen_smp_intr_init_pv(unsigned int cpu)
{
int rc;
char *callfunc_name, *pmu_name;
callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,
cpu,
xen_irq_work_interrupt,
IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(xen_irq_work, cpu).irq = rc;
per_cpu(xen_irq_work, cpu).name = callfunc_name;
if (is_xen_pmu(cpu)) {
pmu_name = kasprintf(GFP_KERNEL, "pmu%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_XENPMU, cpu,
xen_pmu_irq_handler,
IRQF_PERCPU|IRQF_NOBALANCING,
pmu_name, NULL);
if (rc < 0)
goto fail;
per_cpu(xen_pmu_irq, cpu).irq = rc;
per_cpu(xen_pmu_irq, cpu).name = pmu_name;
}
return 0;
fail:
xen_smp_intr_free_pv(cpu);
return rc;
}
void xen_init_lock_cpu(int cpu)
{
int irq;
char *name;
if (!xen_pvspin)
return;
WARN(per_cpu(lock_kicker_irq, cpu) >= 0, "spinlock on CPU%d exists on IRQ%d!\n",
cpu, per_cpu(lock_kicker_irq, cpu));
name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
cpu,
dummy_handler,
IRQF_PERCPU|IRQF_NOBALANCING,
name,
NULL);
if (irq >= 0) {
disable_irq(irq); /* make sure it's never delivered */
per_cpu(lock_kicker_irq, cpu) = irq;
per_cpu(irq_name, cpu) = name;
}
printk("cpu %d spinlock event irq %d\n", cpu, irq);
}
static int
xen_smp_intr_init(unsigned int cpu)
{
int rc;
unsigned int irq;
per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) = -1;
sprintf(resched_name[cpu], "resched%u", cpu);
rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
cpu,
resched_name[cpu],
smp_reschedule_interrupt,
INTR_TYPE_TTY, &irq);
printf("[XEN] IPI cpu=%d irq=%d vector=RESCHEDULE_VECTOR (%d)\n",
cpu, irq, RESCHEDULE_VECTOR);
per_cpu(resched_irq, cpu) = irq;
sprintf(callfunc_name[cpu], "callfunc%u", cpu);
rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR,
cpu,
callfunc_name[cpu],
smp_call_function_interrupt,
INTR_TYPE_TTY, &irq);
if (rc < 0)
goto fail;
per_cpu(callfunc_irq, cpu) = irq;
printf("[XEN] IPI cpu=%d irq=%d vector=CALL_FUNCTION_VECTOR (%d)\n",
cpu, irq, CALL_FUNCTION_VECTOR);
if ((cpu != 0) && ((rc = ap_cpu_initclocks(cpu)) != 0))
goto fail;
return 0;
fail:
if (per_cpu(resched_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(resched_irq, cpu));
if (per_cpu(callfunc_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(callfunc_irq, cpu));
return rc;
}
/*
* This is xen version percpu irq registration, which needs bind
* to xen specific evtchn sub-system. One trick here is that xen
* evtchn binding interface depends on kmalloc because related
* port needs to be freed at device/cpu down. So we cache the
* registration on BSP before slab is ready and then deal them
* at later point. For rest instances happening after slab ready,
* we hook them to xen evtchn immediately.
*
* FIXME: MCA is not supported by far, and thus "nomca" boot param is
* required.
*/
static void
__xen_register_percpu_irq(unsigned int cpu, unsigned int vec,
struct irqaction *action, int save)
{
struct irq_desc *desc;
int irq = 0;
if (xen_slab_ready) {
switch (vec) {
case IA64_TIMER_VECTOR:
snprintf(per_cpu(xen_timer_name, cpu),
sizeof(per_cpu(xen_timer_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_ITC, cpu,
action->handler, action->flags,
per_cpu(xen_timer_name, cpu), action->dev_id);
per_cpu(xen_timer_irq, cpu) = irq;
break;
case IA64_IPI_RESCHEDULE:
snprintf(per_cpu(xen_resched_name, cpu),
sizeof(per_cpu(xen_resched_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR, cpu,
action->handler, action->flags,
per_cpu(xen_resched_name, cpu), action->dev_id);
per_cpu(xen_resched_irq, cpu) = irq;
break;
case IA64_IPI_VECTOR:
snprintf(per_cpu(xen_ipi_name, cpu),
sizeof(per_cpu(xen_ipi_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_IPI_VECTOR, cpu,
action->handler, action->flags,
per_cpu(xen_ipi_name, cpu), action->dev_id);
per_cpu(xen_ipi_irq, cpu) = irq;
break;
case IA64_CMC_VECTOR:
snprintf(per_cpu(xen_cmc_name, cpu),
sizeof(per_cpu(xen_cmc_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_MCA_CMC, cpu,
action->handler,
action->flags,
per_cpu(xen_cmc_name, cpu),
action->dev_id);
per_cpu(xen_cmc_irq, cpu) = irq;
break;
case IA64_CMCP_VECTOR:
snprintf(per_cpu(xen_cmcp_name, cpu),
sizeof(per_cpu(xen_cmcp_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CMCP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(xen_cmcp_name, cpu),
action->dev_id);
per_cpu(xen_cmcp_irq, cpu) = irq;
break;
case IA64_CPEP_VECTOR:
snprintf(per_cpu(xen_cpep_name, cpu),
sizeof(per_cpu(xen_cpep_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CPEP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(xen_cpep_name, cpu),
action->dev_id);
per_cpu(xen_cpep_irq, cpu) = irq;
break;
case IA64_CPE_VECTOR:
case IA64_MCA_RENDEZ_VECTOR:
case IA64_PERFMON_VECTOR:
case IA64_MCA_WAKEUP_VECTOR:
case IA64_SPURIOUS_INT_VECTOR:
/* No need to complain, these aren't supported. */
break;
default:
printk(KERN_WARNING "Percpu irq %d is unsupported "
"by xen!\n", vec);
break;
}
BUG_ON(irq < 0);
if (irq > 0) {
/*
* Mark percpu. Without this, migrate_irqs() will
* mark the interrupt for migrations and trigger it
* on cpu hotplug.
*/
desc = irq_desc + irq;
desc->status |= IRQ_PER_CPU;
}
}
/* For BSP, we cache registered percpu irqs, and then re-walk
* them when initializing APs
*/
if (!cpu && save) {
BUG_ON(saved_irq_cnt == MAX_LATE_IRQ);
saved_percpu_irqs[saved_irq_cnt].irq = vec;
saved_percpu_irqs[saved_irq_cnt].action = action;
saved_irq_cnt++;
if (!xen_slab_ready)
late_irq_cnt++;
}
}
static void
__xen_register_percpu_irq(unsigned int cpu, unsigned int vec,
struct irqaction *action, int save)
{
int irq = 0;
if (xen_slab_ready) {
switch (vec) {
case IA64_TIMER_VECTOR:
snprintf(per_cpu(xen_timer_name, cpu),
sizeof(per_cpu(xen_timer_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_ITC, cpu,
action->handler, action->flags,
per_cpu(xen_timer_name, cpu), action->dev_id);
per_cpu(xen_timer_irq, cpu) = irq;
break;
case IA64_IPI_RESCHEDULE:
snprintf(per_cpu(xen_resched_name, cpu),
sizeof(per_cpu(xen_resched_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR, cpu,
action->handler, action->flags,
per_cpu(xen_resched_name, cpu), action->dev_id);
per_cpu(xen_resched_irq, cpu) = irq;
break;
case IA64_IPI_VECTOR:
snprintf(per_cpu(xen_ipi_name, cpu),
sizeof(per_cpu(xen_ipi_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_IPI_VECTOR, cpu,
action->handler, action->flags,
per_cpu(xen_ipi_name, cpu), action->dev_id);
per_cpu(xen_ipi_irq, cpu) = irq;
break;
case IA64_CMC_VECTOR:
snprintf(per_cpu(xen_cmc_name, cpu),
sizeof(per_cpu(xen_cmc_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_MCA_CMC, cpu,
action->handler,
action->flags,
per_cpu(xen_cmc_name, cpu),
action->dev_id);
per_cpu(xen_cmc_irq, cpu) = irq;
break;
case IA64_CMCP_VECTOR:
snprintf(per_cpu(xen_cmcp_name, cpu),
sizeof(per_cpu(xen_cmcp_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CMCP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(xen_cmcp_name, cpu),
action->dev_id);
per_cpu(xen_cmcp_irq, cpu) = irq;
break;
case IA64_CPEP_VECTOR:
snprintf(per_cpu(xen_cpep_name, cpu),
sizeof(per_cpu(xen_cpep_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CPEP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(xen_cpep_name, cpu),
action->dev_id);
per_cpu(xen_cpep_irq, cpu) = irq;
break;
case IA64_CPE_VECTOR:
case IA64_MCA_RENDEZ_VECTOR:
case IA64_PERFMON_VECTOR:
case IA64_MCA_WAKEUP_VECTOR:
case IA64_SPURIOUS_INT_VECTOR:
/* */
break;
default:
printk(KERN_WARNING "Percpu irq %d is unsupported "
"by xen!\n", vec);
break;
}
BUG_ON(irq < 0);
if (irq > 0) {
/*
*/
irq_set_status_flags(irq, IRQ_PER_CPU);
}
}
/*
*/
if (!cpu && save) {
BUG_ON(saved_irq_cnt == MAX_LATE_IRQ);
saved_percpu_irqs[saved_irq_cnt].irq = vec;
saved_percpu_irqs[saved_irq_cnt].action = action;
saved_irq_cnt++;
if (!xen_slab_ready)
late_irq_cnt++;
}
}
static int xen_smp_intr_init(unsigned int cpu)
{
int rc;
const char *resched_name, *callfunc_name, *debug_name;
resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR,
cpu,
xen_reschedule_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
resched_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(xen_resched_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR,
cpu,
xen_call_function_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(xen_callfunc_irq, cpu) = rc;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
IRQF_DISABLED | IRQF_PERCPU | IRQF_NOBALANCING,
debug_name, NULL);
if (rc < 0)
goto fail;
per_cpu(xen_debug_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
cpu,
xen_call_function_single_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(xen_callfuncsingle_irq, cpu) = rc;
/*
* The IRQ worker on PVHVM goes through the native path and uses the
* IPI mechanism.
*/
if (xen_hvm_domain())
return 0;
callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,
cpu,
xen_irq_work_interrupt,
IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
callfunc_name,
NULL);
if (rc < 0)
goto fail;
per_cpu(xen_irq_work, cpu) = rc;
return 0;
fail:
if (per_cpu(xen_resched_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu), NULL);
if (per_cpu(xen_callfunc_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
if (per_cpu(xen_debug_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu),
NULL);
if (xen_hvm_domain())
return rc;
if (per_cpu(xen_irq_work, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
return rc;
}
