mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-04-29 20:24:00 +00:00
a0154223f6
Now, need_reschedule will test_and_clear the bit NEED_RESCHEDULE in schedule context, then call schedule. It is not a exact match with the name. This patch move the flag clearing into scheudle, and need_reschedule just check and return. Tracked-On: #1821 Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com> Reviewed-by: Yin Fengwei <fengwei.yin@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <hypervisor.h>
|
|
#include <schedule.h>
|
|
#include <softirq.h>
|
|
|
|
static void run_vcpu_pre_work(struct acrn_vcpu *vcpu)
|
|
{
|
|
uint64_t *pending_pre_work = &vcpu->pending_pre_work;
|
|
|
|
if (bitmap_test_and_clear_lock(ACRN_VCPU_MMIO_COMPLETE, pending_pre_work)) {
|
|
dm_emulate_mmio_post(vcpu);
|
|
}
|
|
}
|
|
|
|
void vcpu_thread(struct sched_object *obj)
|
|
{
|
|
struct acrn_vcpu *vcpu = list_entry(obj, struct acrn_vcpu, sched_obj);
|
|
uint32_t basic_exit_reason = 0U;
|
|
int32_t ret = 0;
|
|
|
|
/* If vcpu is not launched, we need to do init_vmcs first */
|
|
if (!vcpu->launched) {
|
|
init_vmcs(vcpu);
|
|
}
|
|
|
|
run_vcpu_pre_work(vcpu);
|
|
|
|
do {
|
|
/* handle pending softirq when irq enable*/
|
|
do_softirq();
|
|
CPU_IRQ_DISABLE();
|
|
/* handle risk softirq when disabling irq*/
|
|
do_softirq();
|
|
|
|
/* Check and process pending requests(including interrupt) */
|
|
ret = acrn_handle_pending_request(vcpu);
|
|
if (ret < 0) {
|
|
pr_fatal("vcpu handling pending request fail");
|
|
pause_vcpu(vcpu, VCPU_ZOMBIE);
|
|
continue;
|
|
}
|
|
|
|
if (need_reschedule(vcpu->pcpu_id)) {
|
|
/*
|
|
* In extrem case, schedule() could return. Which
|
|
* means the vcpu resume happens before schedule()
|
|
* triggered by vcpu suspend. In this case, we need
|
|
* to do pre work and continue vcpu loop after
|
|
* schedule() is return.
|
|
*/
|
|
schedule();
|
|
run_vcpu_pre_work(vcpu);
|
|
continue;
|
|
}
|
|
|
|
TRACE_2L(TRACE_VM_ENTER, 0UL, 0UL);
|
|
|
|
profiling_vmenter_handler(vcpu);
|
|
|
|
ret = run_vcpu(vcpu);
|
|
if (ret != 0) {
|
|
pr_fatal("vcpu resume failed");
|
|
pause_vcpu(vcpu, VCPU_ZOMBIE);
|
|
continue;
|
|
}
|
|
|
|
vcpu->arch.nrexits++;
|
|
|
|
profiling_pre_vmexit_handler(vcpu);
|
|
|
|
CPU_IRQ_ENABLE();
|
|
/* Dispatch handler */
|
|
ret = vmexit_handler(vcpu);
|
|
basic_exit_reason = vcpu->arch.exit_reason & 0xFFFFU;
|
|
if (ret < 0) {
|
|
pr_fatal("dispatch VM exit handler failed for reason"
|
|
" %d, ret = %d!", basic_exit_reason, ret);
|
|
vcpu_inject_gp(vcpu, 0U);
|
|
continue;
|
|
}
|
|
|
|
TRACE_2L(TRACE_VM_EXIT, basic_exit_reason, vcpu_get_rip(vcpu));
|
|
|
|
profiling_post_vmexit_handler(vcpu);
|
|
} while (1);
|
|
}
|
|
|
|
void default_idle(__unused struct sched_object *obj)
|
|
{
|
|
uint16_t pcpu_id = get_cpu_id();
|
|
|
|
while (1) {
|
|
if (need_reschedule(pcpu_id)) {
|
|
schedule();
|
|
} else if (need_offline(pcpu_id) != 0) {
|
|
cpu_dead();
|
|
} else {
|
|
CPU_IRQ_ENABLE();
|
|
handle_complete_ioreq(pcpu_id);
|
|
cpu_do_idle();
|
|
CPU_IRQ_DISABLE();
|
|
}
|
|
}
|
|
}
|