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Commit 9547689f authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

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: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 53b94fdc

arch/x86/xen/smp.c

+24 −20
Original line number Diff line number Diff line
@@ -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;