90 lines
1.5 KiB
C
90 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <hypervisor.h>
|
|
|
|
void disable_softirq(int cpu_id)
|
|
{
|
|
bitmap_clear(SOFTIRQ_ATOMIC, &per_cpu(softirq_pending, cpu_id));
|
|
}
|
|
|
|
void enable_softirq(int cpu_id)
|
|
{
|
|
bitmap_set(SOFTIRQ_ATOMIC, &per_cpu(softirq_pending, cpu_id));
|
|
}
|
|
|
|
void init_softirq(void)
|
|
{
|
|
int cpu_id;
|
|
|
|
for (cpu_id = 0; cpu_id < phy_cpu_num; cpu_id++) {
|
|
per_cpu(softirq_pending, cpu_id) = 0;
|
|
bitmap_set(SOFTIRQ_ATOMIC, &per_cpu(softirq_pending, cpu_id));
|
|
}
|
|
}
|
|
|
|
void raise_softirq(int softirq_id)
|
|
{
|
|
int cpu_id = get_cpu_id();
|
|
uint64_t *bitmap = &per_cpu(softirq_pending, cpu_id);
|
|
|
|
if (cpu_id >= phy_cpu_num)
|
|
return;
|
|
|
|
bitmap_set(softirq_id, bitmap);
|
|
}
|
|
|
|
void exec_softirq(void)
|
|
{
|
|
int cpu_id = get_cpu_id();
|
|
volatile uint64_t *bitmap = &per_cpu(softirq_pending, cpu_id);
|
|
|
|
int softirq_id;
|
|
|
|
if (cpu_id >= phy_cpu_num)
|
|
return;
|
|
|
|
if (((*bitmap) & SOFTIRQ_MASK) == 0UL)
|
|
return;
|
|
|
|
/* Disable softirq
|
|
* SOFTIRQ_ATOMIC bit = 0 means softirq already in execution
|
|
*/
|
|
if (!bitmap_test_and_clear(SOFTIRQ_ATOMIC, bitmap))
|
|
return;
|
|
|
|
again:
|
|
CPU_IRQ_ENABLE();
|
|
|
|
while (1) {
|
|
softirq_id = ffs64(*bitmap);
|
|
if ((softirq_id < 0) || (softirq_id >= SOFTIRQ_MAX))
|
|
break;
|
|
|
|
bitmap_clear(softirq_id, bitmap);
|
|
|
|
switch (softirq_id) {
|
|
case SOFTIRQ_TIMER:
|
|
timer_softirq(cpu_id);
|
|
break;
|
|
case SOFTIRQ_DEV_ASSIGN:
|
|
ptdev_softirq(cpu_id);
|
|
break;
|
|
default:
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
CPU_IRQ_DISABLE();
|
|
|
|
if (((*bitmap) & SOFTIRQ_MASK) != 0U)
|
|
goto again;
|
|
|
|
enable_softirq(cpu_id);
|
|
}
|
|
|