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https://github.com/projectacrn/acrn-hypervisor.git
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7c56243225
When we use script to analyze the latency between vm_exit and vm_entry, it does not include the duration of vm_exit handler. The patch moves the vm_exit trace before vmexit_handler. v2: move vm_exit trace right after run_vcpu. Tracked-On: #2341 Signed-off-by: Zhipeng Gong <zhipeng.gong@intel.com> Reviewed-by: Yan, Like <like.yan@intel.com>
107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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#include <schedule.h>
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#include <softirq.h>
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static void run_vcpu_pre_work(struct acrn_vcpu *vcpu)
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{
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uint64_t *pending_pre_work = &vcpu->pending_pre_work;
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if (bitmap_test_and_clear_lock(ACRN_VCPU_MMIO_COMPLETE, pending_pre_work)) {
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dm_emulate_mmio_post(vcpu);
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}
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}
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void vcpu_thread(struct sched_object *obj)
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{
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struct acrn_vcpu *vcpu = list_entry(obj, struct acrn_vcpu, sched_obj);
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uint32_t basic_exit_reason = 0U;
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int32_t ret = 0;
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/* If vcpu is not launched, we need to do init_vmcs first */
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if (!vcpu->launched) {
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init_vmcs(vcpu);
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}
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run_vcpu_pre_work(vcpu);
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do {
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/* handle pending softirq when irq enable*/
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do_softirq();
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CPU_IRQ_DISABLE();
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/* handle risk softirq when disabling irq*/
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do_softirq();
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/* Check and process pending requests(including interrupt) */
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ret = acrn_handle_pending_request(vcpu);
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if (ret < 0) {
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pr_fatal("vcpu handling pending request fail");
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pause_vcpu(vcpu, VCPU_ZOMBIE);
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continue;
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}
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if (need_reschedule(vcpu->pcpu_id)) {
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/*
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* In extrem case, schedule() could return. Which
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* means the vcpu resume happens before schedule()
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* triggered by vcpu suspend. In this case, we need
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* to do pre work and continue vcpu loop after
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* schedule() is return.
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*/
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schedule();
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run_vcpu_pre_work(vcpu);
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continue;
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}
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profiling_vmenter_handler(vcpu);
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TRACE_2L(TRACE_VM_ENTER, 0UL, 0UL);
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ret = run_vcpu(vcpu);
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if (ret != 0) {
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pr_fatal("vcpu resume failed");
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pause_vcpu(vcpu, VCPU_ZOMBIE);
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continue;
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}
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basic_exit_reason = vcpu->arch.exit_reason & 0xFFFFU;
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TRACE_2L(TRACE_VM_EXIT, basic_exit_reason, vcpu_get_rip(vcpu));
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vcpu->arch.nrexits++;
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profiling_pre_vmexit_handler(vcpu);
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CPU_IRQ_ENABLE();
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/* Dispatch handler */
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ret = vmexit_handler(vcpu);
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if (ret < 0) {
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pr_fatal("dispatch VM exit handler failed for reason"
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" %d, ret = %d!", basic_exit_reason, ret);
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vcpu_inject_gp(vcpu, 0U);
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continue;
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}
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profiling_post_vmexit_handler(vcpu);
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} while (1);
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}
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void default_idle(__unused struct sched_object *obj)
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{
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uint16_t pcpu_id = get_cpu_id();
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while (1) {
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if (need_reschedule(pcpu_id)) {
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schedule();
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} else if (need_offline(pcpu_id) != 0) {
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cpu_dead();
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} else {
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CPU_IRQ_ENABLE();
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cpu_do_idle();
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CPU_IRQ_DISABLE();
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}
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}
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}
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