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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-06-05 00:37:44 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-06-10 16:43:30 +0400
commit9547689fcdf0b223967edcbbe588d9f0489ee5aa (patch)
tree6c793824fb12a92d1dc9763e2e1d6932a600009f /arch/x86/xen
parent53b94fdc8fa0ccd88f97b72a6149672d7ddc0c50 (diff)
downloadlinux-9547689fcdf0b223967edcbbe588d9f0489ee5aa.tar.xz
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>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/smp.c44
1 files changed, 24 insertions, 20 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 19fc9f39e9cc..f5b29ecdf18d 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 __cpuinit cpu_bringup_and_idle(void)
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 @@ static int xen_smp_intr_init(unsigned int cpu)
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 @@ static int xen_smp_intr_init(unsigned int cpu)
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 @@ static int xen_smp_intr_init(unsigned int cpu)
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 @@ static int xen_smp_intr_init(unsigned int cpu)
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 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_irq_work, cpu) = rc;
+ per_cpu(xen_irq_work, cpu).irq = rc;
return 0;