* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
*
* This file contains the code used by various IRQ handling routines:
- * asking for different IRQ's should be done through these routines
+ * asking for different IRQs should be done through these routines
* instead of just grabbing them. Thus setups with different IRQ numbers
* shouldn't result in any weird surprises, and installing new handlers
* should be easier.
* Copyright (C) Ashok Raj<ashok.raj@intel.com>, Intel Corporation 2004
*
* 4/14/2004: Added code to handle cpu migration and do safe irq
- * migration without lossing interrupts for iosapic
+ * migration without losing interrupts for iosapic
* architecture.
*/
}
#ifdef CONFIG_IA64_GENERIC
+ia64_vector __ia64_irq_to_vector(int irq)
+{
+ return irq_cfg[irq].vector;
+}
+
unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
{
- return (unsigned int) vec;
+ return __get_cpu_var(vector_irq)[vec];
}
#endif
unsigned long flags;
if (i == 0) {
- seq_printf(p, " ");
+ char cpuname[16];
+ seq_printf(p, " ");
for_each_online_cpu(j) {
- seq_printf(p, "CPU%d ",j);
+ snprintf(cpuname, 10, "CPU%d", j);
+ seq_printf(p, "%10s ", cpuname);
}
seq_putc(p, '\n');
}
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j) {
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
}
#endif
- seq_printf(p, " %14s", irq_desc[i].handler->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
void set_irq_affinity_info (unsigned int irq, int hwid, int redir)
{
- cpumask_t mask = CPU_MASK_NONE;
-
- cpu_set(cpu_logical_id(hwid), mask);
-
if (irq < NR_IRQS) {
- irq_affinity[irq] = mask;
- set_irq_info(irq, mask);
+ cpumask_copy(irq_desc[irq].affinity,
+ cpumask_of(cpu_logical_id(hwid)));
irq_redir[irq] = (char) (redir & 0xff);
}
}
+
+bool is_affinity_mask_valid(const struct cpumask *cpumask)
+{
+ if (ia64_platform_is("sn2")) {
+ /* Only allow one CPU to be specified in the smp_affinity mask */
+ if (cpumask_weight(cpumask) != 1)
+ return false;
+ }
+ return true;
+}
+
#endif /* CONFIG_SMP */
#ifdef CONFIG_HOTPLUG_CPU
unsigned int vectors_in_migration[NR_IRQS];
/*
- * Since cpu_online_map is already updated, we just need to check for
+ * Since cpu_online_mask is already updated, we just need to check for
* affinity that has zeros
*/
static void migrate_irqs(void)
{
- cpumask_t mask;
irq_desc_t *desc;
int irq, new_cpu;
for (irq=0; irq < NR_IRQS; irq++) {
- desc = irq_descp(irq);
+ desc = irq_desc + irq;
+
+ if (desc->status == IRQ_DISABLED)
+ continue;
/*
* No handling for now.
if (desc->status == IRQ_PER_CPU)
continue;
- cpus_and(mask, irq_affinity[irq], cpu_online_map);
- if (any_online_cpu(mask) == NR_CPUS) {
+ if (cpumask_any_and(irq_desc[irq].affinity, cpu_online_mask)
+ >= nr_cpu_ids) {
/*
* Save it for phase 2 processing
*/
vectors_in_migration[irq] = irq;
- new_cpu = any_online_cpu(cpu_online_map);
- mask = cpumask_of_cpu(new_cpu);
+ new_cpu = cpumask_any(cpu_online_mask);
/*
* Al three are essential, currently WARN_ON.. maybe panic?
*/
- if (desc->handler && desc->handler->disable &&
- desc->handler->enable && desc->handler->set_affinity) {
- desc->handler->disable(irq);
- desc->handler->set_affinity(irq, mask);
- desc->handler->enable(irq);
+ if (desc->chip && desc->chip->disable &&
+ desc->chip->enable && desc->chip->set_affinity) {
+ desc->chip->disable(irq);
+ desc->chip->set_affinity(irq,
+ cpumask_of(new_cpu));
+ desc->chip->enable(irq);
} else {
- WARN_ON((!(desc->handler) || !(desc->handler->disable) ||
- !(desc->handler->enable) ||
- !(desc->handler->set_affinity)));
+ WARN_ON((!(desc->chip) || !(desc->chip->disable) ||
+ !(desc->chip->enable) ||
+ !(desc->chip->set_affinity)));
}
}
}
{
unsigned int irq;
extern void ia64_process_pending_intr(void);
+ extern volatile int time_keeper_id;
+
+ /* Mask ITV to disable timer */
+ ia64_set_itv(1 << 16);
- ia64_set_itv(1<<16);
/*
- * Phase 1: Locate irq's bound to this cpu and
+ * Find a new timesync master
+ */
+ if (smp_processor_id() == time_keeper_id) {
+ time_keeper_id = cpumask_first(cpu_online_mask);
+ printk ("CPU %d is now promoted to time-keeper master\n", time_keeper_id);
+ }
+
+ /*
+ * Phase 1: Locate IRQs bound to this cpu and
* relocate them for cpu removal.
*/
migrate_irqs();
*/
for (irq=0; irq < NR_IRQS; irq++) {
if (vectors_in_migration[irq]) {
+ struct pt_regs *old_regs = set_irq_regs(NULL);
+
vectors_in_migration[irq]=0;
- __do_IRQ(irq, NULL);
+ generic_handle_irq(irq);
+ set_irq_regs(old_regs);
}
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff