X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=kernel%2Firq%2Fproc.c;h=6c6d35d68ee9c9628d5e5b67f2e32fdd91553f52;hb=da6e88f4963385b1b649b043691d206fbb951913;hp=ddde0ef9ccdcbb4dbd8834accc5f0264deee8403;hpb=36f021b579d195cdc5fa6f3e2bab198b4bf70643;p=cascardo%2Flinux.git

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index ddde0ef9ccdc..6c6d35d68ee9 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -19,7 +19,15 @@ static struct proc_dir_entry *root_irq_dir;
 static int irq_affinity_read_proc(char *page, char **start, off_t off,
 				  int count, int *eof, void *data)
 {
-	int len = cpumask_scnprintf(page, count, irq_desc[(long)data].affinity);
+	struct irq_desc *desc = irq_desc + (long)data;
+	cpumask_t *mask = &desc->affinity;
+	int len;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+	if (desc->status & IRQ_MOVE_PENDING)
+		mask = &desc->pending_mask;
+#endif
+	len = cpumask_scnprintf(page, count, *mask);
 
 	if (count - len < 2)
 		return -EINVAL;
@@ -27,12 +35,16 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off,
 	return len;
 }
 
+#ifndef is_affinity_mask_valid
+#define is_affinity_mask_valid(val) 1
+#endif
+
 int no_irq_affinity;
 static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
 				   unsigned long count, void *data)
 {
 	unsigned int irq = (int)(long)data, full_count = count, err;
-	cpumask_t new_value, tmp;
+	cpumask_t new_value;
 
 	if (!irq_desc[irq].chip->set_affinity || no_irq_affinity ||
 	    irq_balancing_disabled(irq))
@@ -42,24 +54,73 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
 	if (err)
 		return err;
 
+	if (!is_affinity_mask_valid(new_value))
+		return -EINVAL;
+
 	/*
 	 * Do not allow disabling IRQs completely - it's a too easy
 	 * way to make the system unusable accidentally :-) At least
 	 * one online CPU still has to be targeted.
 	 */
-	cpus_and(tmp, new_value, cpu_online_map);
-	if (cpus_empty(tmp))
+	if (!cpus_intersects(new_value, cpu_online_map))
 		/* Special case for empty set - allow the architecture
 		   code to set default SMP affinity. */
-		return select_smp_affinity(irq) ? -EINVAL : full_count;
+		return irq_select_affinity(irq) ? -EINVAL : full_count;
 
 	irq_set_affinity(irq, new_value);
 
 	return full_count;
 }
 
+static int default_affinity_read(char *page, char **start, off_t off,
+				  int count, int *eof, void *data)
+{
+	int len = cpumask_scnprintf(page, count, irq_default_affinity);
+	if (count - len < 2)
+		return -EINVAL;
+	len += sprintf(page + len, "\n");
+	return len;
+}
+
+static int default_affinity_write(struct file *file, const char __user *buffer,
+				   unsigned long count, void *data)
+{
+	unsigned int full_count = count, err;
+	cpumask_t new_value;
+
+	err = cpumask_parse_user(buffer, count, new_value);
+	if (err)
+		return err;
+
+	if (!is_affinity_mask_valid(new_value))
+		return -EINVAL;
+
+	/*
+	 * Do not allow disabling IRQs completely - it's a too easy
+	 * way to make the system unusable accidentally :-) At least
+	 * one online CPU still has to be targeted.
+	 */
+	if (!cpus_intersects(new_value, cpu_online_map))
+		return -EINVAL;
+
+	irq_default_affinity = new_value;
+
+	return full_count;
+}
 #endif
 
+static int irq_spurious_read(char *page, char **start, off_t off,
+				  int count, int *eof, void *data)
+{
+	struct irq_desc *d = &irq_desc[(long) data];
+	return sprintf(page, "count %u\n"
+			     "unhandled %u\n"
+			     "last_unhandled %u ms\n",
+			d->irq_count,
+			d->irqs_unhandled,
+			jiffies_to_msecs(d->last_unhandled));
+}
+
 #define MAX_NAMELEN 128
 
 static int name_unique(unsigned int irq, struct irqaction *new_action)
@@ -103,6 +164,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 void register_irq_proc(unsigned int irq)
 {
 	char name [MAX_NAMELEN];
+	struct proc_dir_entry *entry;
 
 	if (!root_irq_dir ||
 		(irq_desc[irq].chip == &no_irq_chip) ||
@@ -117,8 +179,6 @@ void register_irq_proc(unsigned int irq)
 
 #ifdef CONFIG_SMP
 	{
-		struct proc_dir_entry *entry;
-
 		/* create /proc/irq/<irq>/smp_affinity */
 		entry = create_proc_entry("smp_affinity", 0600, irq_desc[irq].dir);
 
@@ -129,6 +189,12 @@ void register_irq_proc(unsigned int irq)
 		}
 	}
 #endif
+
+	entry = create_proc_entry("spurious", 0444, irq_desc[irq].dir);
+	if (entry) {
+		entry->data = (void *)(long)irq;
+		entry->read_proc = irq_spurious_read;
+	}
 }
 
 #undef MAX_NAMELEN
@@ -139,6 +205,21 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
 		remove_proc_entry(action->dir->name, irq_desc[irq].dir);
 }
 
+void register_default_affinity_proc(void)
+{
+#ifdef CONFIG_SMP
+	struct proc_dir_entry *entry;
+
+	/* create /proc/irq/default_smp_affinity */
+	entry = create_proc_entry("default_smp_affinity", 0600, root_irq_dir);
+	if (entry) {
+		entry->data = NULL;
+		entry->read_proc  = default_affinity_read;
+		entry->write_proc = default_affinity_write;
+	}
+#endif
+}
+
 void init_irq_proc(void)
 {
 	int i;
@@ -148,6 +229,8 @@ void init_irq_proc(void)
 	if (!root_irq_dir)
 		return;
 
+	register_default_affinity_proc();
+
 	/*
 	 * Create entries for all existing IRQs.
 	 */