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-rw-r--r--kernel/irq/ipi.c45
-rw-r--r--kernel/irq/irqdesc.c26
-rw-r--r--kernel/irq/irqdomain.c19
-rw-r--r--kernel/irq/manage.c2
4 files changed, 65 insertions, 27 deletions
diff --git a/kernel/irq/ipi.c b/kernel/irq/ipi.c
index 14777af8e097..c42742208e5e 100644
--- a/kernel/irq/ipi.c
+++ b/kernel/irq/ipi.c
@@ -19,9 +19,9 @@
*
* Allocate a virq that can be used to send IPI to any CPU in dest mask.
*
- * On success it'll return linux irq number and 0 on failure
+ * On success it'll return linux irq number and error code on failure
*/
-unsigned int irq_reserve_ipi(struct irq_domain *domain,
+int irq_reserve_ipi(struct irq_domain *domain,
const struct cpumask *dest)
{
unsigned int nr_irqs, offset;
@@ -30,18 +30,18 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain,
if (!domain ||!irq_domain_is_ipi(domain)) {
pr_warn("Reservation on a non IPI domain\n");
- return 0;
+ return -EINVAL;
}
if (!cpumask_subset(dest, cpu_possible_mask)) {
pr_warn("Reservation is not in possible_cpu_mask\n");
- return 0;
+ return -EINVAL;
}
nr_irqs = cpumask_weight(dest);
if (!nr_irqs) {
pr_warn("Reservation for empty destination mask\n");
- return 0;
+ return -EINVAL;
}
if (irq_domain_is_ipi_single(domain)) {
@@ -72,14 +72,14 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain,
next = cpumask_next(next, dest);
if (next < nr_cpu_ids) {
pr_warn("Destination mask has holes\n");
- return 0;
+ return -EINVAL;
}
}
virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE);
if (virq <= 0) {
pr_warn("Can't reserve IPI, failed to alloc descs\n");
- return 0;
+ return -ENOMEM;
}
virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE,
@@ -100,17 +100,20 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain,
free_descs:
irq_free_descs(virq, nr_irqs);
- return 0;
+ return -EBUSY;
}
/**
* irq_destroy_ipi() - unreserve an IPI that was previously allocated
* @irq: linux irq number to be destroyed
+ * @dest: cpumask of cpus which should have the IPI removed
*
- * Return the IPIs allocated with irq_reserve_ipi() to the system destroying
- * all virqs associated with them.
+ * The IPIs allocated with irq_reserve_ipi() are retuerned to the system
+ * destroying all virqs associated with them.
+ *
+ * Return 0 on success or error code on failure.
*/
-void irq_destroy_ipi(unsigned int irq)
+int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest)
{
struct irq_data *data = irq_get_irq_data(irq);
struct cpumask *ipimask = data ? irq_data_get_affinity_mask(data) : NULL;
@@ -118,7 +121,7 @@ void irq_destroy_ipi(unsigned int irq)
unsigned int nr_irqs;
if (!irq || !data || !ipimask)
- return;
+ return -EINVAL;
domain = data->domain;
if (WARN_ON(domain == NULL))
@@ -126,15 +129,25 @@ void irq_destroy_ipi(unsigned int irq)
if (!irq_domain_is_ipi(domain)) {
pr_warn("Trying to destroy a non IPI domain!\n");
- return;
+ return -EINVAL;
}
- if (irq_domain_is_ipi_per_cpu(domain))
- nr_irqs = cpumask_weight(ipimask);
- else
+ if (WARN_ON(!cpumask_subset(dest, ipimask)))
+ /*
+ * Must be destroying a subset of CPUs to which this IPI
+ * was set up to target
+ */
+ return -EINVAL;
+
+ if (irq_domain_is_ipi_per_cpu(domain)) {
+ irq = irq + cpumask_first(dest) - data->common->ipi_offset;
+ nr_irqs = cpumask_weight(dest);
+ } else {
nr_irqs = 1;
+ }
irq_domain_free_irqs(irq, nr_irqs);
+ return 0;
}
/**
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 0ccd028817d7..8731e1c5d1e7 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -595,7 +595,8 @@ void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus)
chip_bus_sync_unlock(desc);
}
-int irq_set_percpu_devid(unsigned int irq)
+int irq_set_percpu_devid_partition(unsigned int irq,
+ const struct cpumask *affinity)
{
struct irq_desc *desc = irq_to_desc(irq);
@@ -610,10 +611,33 @@ int irq_set_percpu_devid(unsigned int irq)
if (!desc->percpu_enabled)
return -ENOMEM;
+ if (affinity)
+ desc->percpu_affinity = affinity;
+ else
+ desc->percpu_affinity = cpu_possible_mask;
+
irq_set_percpu_devid_flags(irq);
return 0;
}
+int irq_set_percpu_devid(unsigned int irq)
+{
+ return irq_set_percpu_devid_partition(irq, NULL);
+}
+
+int irq_get_percpu_devid_partition(unsigned int irq, struct cpumask *affinity)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (!desc || !desc->percpu_enabled)
+ return -EINVAL;
+
+ if (affinity)
+ cpumask_copy(affinity, desc->percpu_affinity);
+
+ return 0;
+}
+
void kstat_incr_irq_this_cpu(unsigned int irq)
{
kstat_incr_irqs_this_cpu(irq_to_desc(irq));
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 3a519a01118b..503c5b9dd030 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -243,14 +243,15 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
/**
- * irq_find_matching_fwnode() - Locates a domain for a given fwnode
- * @fwnode: FW descriptor of the interrupt controller
+ * irq_find_matching_fwspec() - Locates a domain for a given fwspec
+ * @fwspec: FW specifier for an interrupt
* @bus_token: domain-specific data
*/
-struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
+struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
enum irq_domain_bus_token bus_token)
{
struct irq_domain *h, *found = NULL;
+ struct fwnode_handle *fwnode = fwspec->fwnode;
int rc;
/* We might want to match the legacy controller last since
@@ -264,7 +265,9 @@ struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
*/
mutex_lock(&irq_domain_mutex);
list_for_each_entry(h, &irq_domain_list, link) {
- if (h->ops->match)
+ if (h->ops->select && fwspec->param_count)
+ rc = h->ops->select(h, fwspec, bus_token);
+ else if (h->ops->match)
rc = h->ops->match(h, to_of_node(fwnode), bus_token);
else
rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
@@ -279,7 +282,7 @@ struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
mutex_unlock(&irq_domain_mutex);
return found;
}
-EXPORT_SYMBOL_GPL(irq_find_matching_fwnode);
+EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
/**
* irq_set_default_host() - Set a "default" irq domain
@@ -574,11 +577,9 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
int virq;
if (fwspec->fwnode) {
- domain = irq_find_matching_fwnode(fwspec->fwnode,
- DOMAIN_BUS_WIRED);
+ domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
if (!domain)
- domain = irq_find_matching_fwnode(fwspec->fwnode,
- DOMAIN_BUS_ANY);
+ domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
} else {
domain = irq_default_domain;
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index cc1cc641d653..ef0bc02c3a70 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1407,7 +1407,7 @@ int setup_irq(unsigned int irq, struct irqaction *act)
int retval;
struct irq_desc *desc = irq_to_desc(irq);
- if (WARN_ON(irq_settings_is_per_cpu_devid(desc)))
+ if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
return -EINVAL;
chip_bus_lock(desc);
retval = __setup_irq(irq, desc, act);