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xen: implement apic ipi interface

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

Tested-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Ben Guthro <ben@guthro.net>
Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ben Guthro 2012-04-21 00:11:04 +08:00 committed by Konrad Rzeszutek Wilk
parent 569ca5b3f9
commit f447d56d36
3 changed files with 98 additions and 4 deletions
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9
arch/x86/xen/enlighten.c
View file

@ -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

81
arch/x86/xen/smp.c
View file

@ -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();

12
arch/x86/xen/smp.h Normal file
View file

@ -0,0 +1,12 @@
#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