125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <types.h>
|
|
#include <errno.h>
|
|
#include <asm/lib/bits.h>
|
|
#include <asm/lib/atomic.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/per_cpu.h>
|
|
#include <asm/lapic.h>
|
|
#include <asm/guest/vm.h>
|
|
|
|
static uint32_t notification_irq = IRQ_INVALID;
|
|
|
|
static uint64_t smp_call_mask = 0UL;
|
|
|
|
/* run in interrupt context */
|
|
static void kick_notification(__unused uint32_t irq, __unused void *data)
|
|
{
|
|
/* Notification vector is used to kick taget cpu out of non-root mode.
|
|
* And it also serves for smp call.
|
|
*/
|
|
uint16_t pcpu_id = get_pcpu_id();
|
|
|
|
if (bitmap_test(pcpu_id, &smp_call_mask)) {
|
|
struct smp_call_info_data *smp_call =
|
|
&per_cpu(smp_call_info, pcpu_id);
|
|
|
|
if (smp_call->func != NULL) {
|
|
smp_call->func(smp_call->data);
|
|
}
|
|
bitmap_clear_lock(pcpu_id, &smp_call_mask);
|
|
}
|
|
}
|
|
|
|
void smp_call_function(uint64_t mask, smp_call_func_t func, void *data)
|
|
{
|
|
uint16_t pcpu_id;
|
|
struct smp_call_info_data *smp_call;
|
|
|
|
/* wait for previous smp call complete, which may run on other cpus */
|
|
while (atomic_cmpxchg64(&smp_call_mask, 0UL, mask) != 0UL);
|
|
pcpu_id = ffs64(mask);
|
|
while (pcpu_id < MAX_PCPU_NUM) {
|
|
bitmap_clear_nolock(pcpu_id, &mask);
|
|
if (is_pcpu_active(pcpu_id)) {
|
|
smp_call = &per_cpu(smp_call_info, pcpu_id);
|
|
smp_call->func = func;
|
|
smp_call->data = data;
|
|
} else {
|
|
/* pcpu is not in active, print error */
|
|
pr_err("pcpu_id %d not in active!", pcpu_id);
|
|
bitmap_clear_nolock(pcpu_id, &smp_call_mask);
|
|
}
|
|
pcpu_id = ffs64(mask);
|
|
}
|
|
send_dest_ipi_mask((uint32_t)smp_call_mask, NOTIFY_VCPU_VECTOR);
|
|
/* wait for current smp call complete */
|
|
wait_sync_change(&smp_call_mask, 0UL);
|
|
}
|
|
|
|
static int32_t request_notification_irq(irq_action_t func, void *data)
|
|
{
|
|
int32_t retval;
|
|
|
|
if (notification_irq != IRQ_INVALID) {
|
|
pr_info("%s, Notification vector already allocated on this CPU", __func__);
|
|
retval = -EBUSY;
|
|
} else {
|
|
/* all cpu register the same notification vector */
|
|
retval = request_irq(NOTIFY_VCPU_IRQ, func, data, IRQF_NONE);
|
|
if (retval < 0) {
|
|
pr_err("Failed to add notify isr");
|
|
retval = -ENODEV;
|
|
} else {
|
|
notification_irq = (uint32_t)retval;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* @pre be called only by BSP initialization process
|
|
*/
|
|
void setup_notification(void)
|
|
{
|
|
/* support IPI notification, Service VM will register all CPU */
|
|
if (request_notification_irq(kick_notification, NULL) < 0) {
|
|
pr_err("Failed to setup notification");
|
|
}
|
|
|
|
dev_dbg(DBG_LEVEL_PTIRQ, "NOTIFY: irq[%d] setup vector %x",
|
|
notification_irq, irq_to_vector(notification_irq));
|
|
}
|
|
|
|
/*
|
|
* posted interrupt handler
|
|
* @pre (irq - POSTED_INTR_IRQ) < CONFIG_MAX_VM_NUM
|
|
*/
|
|
static void handle_pi_notification(uint32_t irq, __unused void *data)
|
|
{
|
|
uint32_t vcpu_index = irq - POSTED_INTR_IRQ;
|
|
|
|
ASSERT(vcpu_index < CONFIG_MAX_VM_NUM, "");
|
|
vcpu_handle_pi_notification(vcpu_index);
|
|
}
|
|
|
|
/*pre-condition: be called only by BSP initialization proccess*/
|
|
void setup_pi_notification(void)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0U; i < CONFIG_MAX_VM_NUM; i++) {
|
|
if (request_irq(POSTED_INTR_IRQ + i, handle_pi_notification, NULL, IRQF_NONE) < 0) {
|
|
pr_err("Failed to setup pi notification");
|
|
break;
|
|
}
|
|
}
|
|
}
|