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https://github.com/projectacrn/acrn-hypervisor.git
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11e67f1c4a
softirq shouldn't be bounded to vcpu thread. One issue for this is shell (based on timer) can't work if we don't start any guest. This change also is trying best to make softirq handler running with irq enabled. Also update the irq disable/enabel in vmexit handler to align with the usage in vcpu_thread. Tracked-On: #3387 Signed-off-by: Yin Fengwei <fengwei.yin@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
98 lines
2.1 KiB
C
98 lines
2.1 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 <vm.h>
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#include <vm_reset.h>
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#include <vmcs.h>
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#include <vmexit.h>
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#include <irq.h>
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#include <schedule.h>
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#include <softirq.h>
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#include <profiling.h>
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#include <trace.h>
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#include <logmsg.h>
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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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do {
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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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if (!is_lapic_pt_enabled(vcpu)) {
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CPU_IRQ_DISABLE();
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}
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/* Don't open interrupt window between here and vmentry */
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if (need_reschedule(vcpu->pcpu_id)) {
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schedule();
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continue;
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}
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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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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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if (!is_lapic_pt_enabled(vcpu)) {
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CPU_IRQ_ENABLE();
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}
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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_pcpu_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)) {
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cpu_dead();
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} else if (need_shutdown_vm(pcpu_id)) {
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shutdown_vm_from_idle(pcpu_id);
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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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