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https://github.com/projectacrn/acrn-hypervisor.git
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3cb32bb6e3
After changing init_vmcs to smp call approach and do it before
launch_vcpu, it could work with noop scheduler. On real sharing
scheudler, it has problem.
pcpu0 pcpu1 pcpu1
vmBvcpu0 vmAvcpu1 vmBvcpu1
vmentry
init_vmcs(vmBvcpu1) vmexit->do_init_vmcs
corrupt current vmcs
vmentry fail
launch_vcpu(vmBvcpu1)
This patch mark a event flag when request vmcs init for specific vcpu. When
it is running and checking pending events, will do init_vmcs firstly.
Tracked-On: #4178
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
113 lines
2.5 KiB
C
113 lines
2.5 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 <profiling.h>
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#include <sprintf.h>
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#include <trace.h>
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#include <logmsg.h>
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void vcpu_thread(struct thread_object *obj)
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{
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struct acrn_vcpu *vcpu = list_entry(obj, struct acrn_vcpu, thread_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 (!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(pcpuid_from_vcpu(vcpu))) {
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schedule();
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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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/* Fatal error happened (triple fault). Stop the vcpu running. */
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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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/* Fatal error happened (resume vcpu failed). Stop the vcpu running. */
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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 thread_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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void run_idle_thread(void)
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{
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uint16_t pcpu_id = get_pcpu_id();
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struct thread_object *idle = &per_cpu(idle, pcpu_id);
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char idle_name[16];
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snprintf(idle_name, 16U, "idle%hu", pcpu_id);
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(void)strncpy_s(idle->name, 16U, idle_name, 16U);
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idle->pcpu_id = pcpu_id;
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idle->thread_entry = default_idle;
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idle->switch_out = NULL;
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idle->switch_in = NULL;
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run_thread(idle);
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/* Control should not come here */
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cpu_dead();
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}
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