bianbu-repo-mirror/bianbu-linux-6.6
1
0
Fork 0
mirror of https://gitee.com/bianbu-linux/linux-6.6 synced 2025-04-24 14:07:52 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

genirq: Make irq_set_vcpu_affinity available for CONFIG_SMP=n

Browse source 
irq_set_vcpu_affinity() is needed when CONFIG_SMP=n, so move the
definition out of "#ifdef CONFIG_SMP"

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Feng Wu <feng.wu@intel.com>
Cc: jiang.liu@linux.intel.com
Cc: pbonzini@redhat.com
Link: http://lkml.kernel.org/r/1443860438-144926-1-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Feng Wu 2015-10-03 16:20:38 +08:00 • committed by Thomas Gleixner
parent e509bd7da1
commit fcf1ae2f7a
1 changed files with 31 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

62
kernel/irq/manage.c
View file

@ -258,37 +258,6 @@ int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
} }
EXPORT_SYMBOL_GPL(irq_set_affinity_hint); EXPORT_SYMBOL_GPL(irq_set_affinity_hint);
/**
* irq_set_vcpu_affinity - Set vcpu affinity for the interrupt
* @irq: interrupt number to set affinity
* @vcpu_info: vCPU specific data
*
* This function uses the vCPU specific data to set the vCPU
* affinity for an irq. The vCPU specific data is passed from
* outside, such as KVM. One example code path is as below:
* KVM -> IOMMU -> irq_set_vcpu_affinity().
*/
int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info)
{
unsigned long flags;
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
struct irq_data *data;
struct irq_chip *chip;
int ret = -ENOSYS;
if (!desc)
return -EINVAL;
data = irq_desc_get_irq_data(desc);
chip = irq_data_get_irq_chip(data);
if (chip && chip->irq_set_vcpu_affinity)
ret = chip->irq_set_vcpu_affinity(data, vcpu_info);
irq_put_desc_unlock(desc, flags);
return ret;
}
EXPORT_SYMBOL_GPL(irq_set_vcpu_affinity);
static void irq_affinity_notify(struct work_struct *work) static void irq_affinity_notify(struct work_struct *work)
{ {
struct irq_affinity_notify *notify = struct irq_affinity_notify *notify =
@ -424,6 +393,37 @@ setup_affinity(struct irq_desc *desc, struct cpumask *mask)
} }
#endif #endif
/**
* irq_set_vcpu_affinity - Set vcpu affinity for the interrupt
* @irq: interrupt number to set affinity
* @vcpu_info: vCPU specific data
*
* This function uses the vCPU specific data to set the vCPU
* affinity for an irq. The vCPU specific data is passed from
* outside, such as KVM. One example code path is as below:
* KVM -> IOMMU -> irq_set_vcpu_affinity().
*/
int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info)
{
unsigned long flags;
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
struct irq_data *data;
struct irq_chip *chip;
int ret = -ENOSYS;
if (!desc)
return -EINVAL;
data = irq_desc_get_irq_data(desc);
chip = irq_data_get_irq_chip(data);
if (chip && chip->irq_set_vcpu_affinity)
ret = chip->irq_set_vcpu_affinity(data, vcpu_info);
irq_put_desc_unlock(desc, flags);
return ret;
}
EXPORT_SYMBOL_GPL(irq_set_vcpu_affinity);
void __disable_irq(struct irq_desc *desc) void __disable_irq(struct irq_desc *desc)
{ {
if (!desc->depth++) if (!desc->depth++)