xen/smp: Introduce a common structure to contain the IRQ name and interrupt line.
This patch adds a new structure to contain the common two things
that each of the per-cpu interrupts need:
- an interrupt number,
- and the name of the interrupt (to be added in 'xen/smp: Don't leak
interrupt name when offlining').
This allows us to carry the tuple of the per-cpu interrupt data structure
and expand it as we need in the future.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 19fc9f3..f5b29ec 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -39,11 +39,15 @@
cpumask_var_t xen_cpu_initialized_map;
-static DEFINE_PER_CPU(int, xen_resched_irq);
-static DEFINE_PER_CPU(int, xen_callfunc_irq);
-static DEFINE_PER_CPU(int, xen_callfuncsingle_irq);
-static DEFINE_PER_CPU(int, xen_irq_work);
-static DEFINE_PER_CPU(int, xen_debug_irq) = -1;
+struct xen_common_irq {
+ int irq;
+ char *name;
+};
+static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq);
+static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq);
+static DEFINE_PER_CPU(struct xen_common_irq, xen_callfuncsingle_irq);
+static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work);
+static DEFINE_PER_CPU(struct xen_common_irq, xen_debug_irq) = { .irq = -1 };
static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id);
static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
@@ -100,20 +104,20 @@
static void xen_smp_intr_free(unsigned int cpu)
{
- 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),
+ if (per_cpu(xen_resched_irq, cpu).irq >= 0)
+ unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu).irq, NULL);
+ if (per_cpu(xen_callfunc_irq, cpu).irq >= 0)
+ unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu).irq, NULL);
+ if (per_cpu(xen_debug_irq, cpu).irq >= 0)
+ unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu).irq, NULL);
+ if (per_cpu(xen_callfuncsingle_irq, cpu).irq >= 0)
+ unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu).irq,
NULL);
if (xen_hvm_domain())
return;
- if (per_cpu(xen_irq_work, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
+ if (per_cpu(xen_irq_work, cpu).irq >= 0)
+ unbind_from_irqhandler(per_cpu(xen_irq_work, cpu).irq, NULL);
};
static int xen_smp_intr_init(unsigned int cpu)
{
@@ -129,7 +133,7 @@
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_resched_irq, cpu) = rc;
+ per_cpu(xen_resched_irq, cpu).irq = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR,
@@ -140,7 +144,7 @@
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_callfunc_irq, cpu) = rc;
+ per_cpu(xen_callfunc_irq, cpu).irq = rc;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
@@ -148,7 +152,7 @@
debug_name, NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_debug_irq, cpu) = rc;
+ per_cpu(xen_debug_irq, cpu).irq = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
@@ -159,7 +163,7 @@
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_callfuncsingle_irq, cpu) = rc;
+ per_cpu(xen_callfuncsingle_irq, cpu).irq = rc;
/*
* The IRQ worker on PVHVM goes through the native path and uses the
@@ -177,7 +181,7 @@
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_irq_work, cpu) = rc;
+ per_cpu(xen_irq_work, cpu).irq = rc;
return 0;