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Commit f447d56d authored by Ben Guthro's avatar Ben Guthro Committed by Konrad Rzeszutek Wilk
Browse files

xen: implement apic ipi interface 



Map native ipi vector to xen vector.
Implement apic ipi interface with xen_send_IPI_one.

Tested-by: default avatarSteven Noonan <steven@uplinklabs.net>
Signed-off-by: default avatarBen Guthro <ben@guthro.net>
Signed-off-by: default avatarLin Ming <mlin@ss.pku.edu.cn>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 569ca5b3

arch/x86/xen/enlighten.c

+9 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ 


#include "xen-ops.h"

#include "mmu.h"

#include "smp.h"

#include "multicalls.h"



EXPORT_SYMBOL_GPL(hypercall_page);
@@ -849,6 +850,14 @@ static void set_xen_basic_apic_ops(void) 
	apic->icr_write = xen_apic_icr_write;

	apic->wait_icr_idle = xen_apic_wait_icr_idle;

	apic->safe_wait_icr_idle = xen_safe_apic_wait_icr_idle;



#ifdef CONFIG_SMP

	apic->send_IPI_allbutself = xen_send_IPI_allbutself;

	apic->send_IPI_mask_allbutself = xen_send_IPI_mask_allbutself;

	apic->send_IPI_mask = xen_send_IPI_mask;

	apic->send_IPI_all = xen_send_IPI_all;

	apic->send_IPI_self = xen_send_IPI_self;

#endif

}



#endif

arch/x86/xen/smp.c

+77 −4
Original line number Diff line number Diff line
@@ -465,8 +465,8 @@ static void xen_smp_send_reschedule(int cpu) 
	xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);

}



static void xen_send_IPI_mask(const struct cpumask *mask,

			      enum ipi_vector vector)

static void __xen_send_IPI_mask(const struct cpumask *mask,

			      int vector)

{

	unsigned cpu;
@@ -478,7 +478,7 @@ static void xen_smp_send_call_function_ipi(const struct cpumask *mask) 
{

	int cpu;



	xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);

	__xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);



	/* Make sure other vcpus get a chance to run if they need to. */

	for_each_cpu(cpu, mask) {
@@ -491,10 +491,83 @@ static void xen_smp_send_call_function_ipi(const struct cpumask *mask) 


static void xen_smp_send_call_function_single_ipi(int cpu)

{

	xen_send_IPI_mask(cpumask_of(cpu),

	__xen_send_IPI_mask(cpumask_of(cpu),

			  XEN_CALL_FUNCTION_SINGLE_VECTOR);

}



static inline int xen_map_vector(int vector)

{

	int xen_vector;



	switch (vector) {

	case RESCHEDULE_VECTOR:

		xen_vector = XEN_RESCHEDULE_VECTOR;

		break;

	case CALL_FUNCTION_VECTOR:

		xen_vector = XEN_CALL_FUNCTION_VECTOR;

		break;

	case CALL_FUNCTION_SINGLE_VECTOR:

		xen_vector = XEN_CALL_FUNCTION_SINGLE_VECTOR;

		break;

	default:

		xen_vector = -1;

		printk(KERN_ERR "xen: vector 0x%x is not implemented\n",

			vector);

	}



	return xen_vector;

}



void xen_send_IPI_mask(const struct cpumask *mask,

			      int vector)

{

	int xen_vector = xen_map_vector(vector);



	if (xen_vector >= 0)

		__xen_send_IPI_mask(mask, xen_vector);

}



void xen_send_IPI_all(int vector)

{

	int xen_vector = xen_map_vector(vector);



	if (xen_vector >= 0)

		__xen_send_IPI_mask(cpu_online_mask, xen_vector);

}



void xen_send_IPI_self(int vector)

{

	int xen_vector = xen_map_vector(vector);



	if (xen_vector >= 0)

		xen_send_IPI_one(smp_processor_id(), xen_vector);

}



void xen_send_IPI_mask_allbutself(const struct cpumask *mask,

				int vector)

{

	unsigned cpu;

	unsigned int this_cpu = smp_processor_id();



	if (!(num_online_cpus() > 1))

		return;



	for_each_cpu_and(cpu, mask, cpu_online_mask) {

		if (this_cpu == cpu)

			continue;



		xen_smp_send_call_function_single_ipi(cpu);

	}

}



void xen_send_IPI_allbutself(int vector)

{

	int xen_vector = xen_map_vector(vector);



	if (xen_vector >= 0)

		xen_send_IPI_mask_allbutself(cpu_online_mask, xen_vector);

}



static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)

{

	irq_enter();

arch/x86/xen/smp.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 
#ifndef _XEN_SMP_H



extern void xen_send_IPI_mask(const struct cpumask *mask,

			      int vector);

extern void xen_send_IPI_mask_allbutself(const struct cpumask *mask,

				int vector);

extern void xen_send_IPI_allbutself(int vector);

extern void physflat_send_IPI_allbutself(int vector);

extern void xen_send_IPI_all(int vector);

extern void xen_send_IPI_self(int vector);



#endif