mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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7d44cd5c28
This patch introduces check_vm_vlapic_state API instead of is_lapic_pt_enabled to check if all the vCPUs of a VM are using x2APIC mode and LAPIC pass-through is enabled on all of them. When the VM is in VM_VLAPIC_TRANSITION or VM_VLAPIC_DISABLED state, following conditions apply. 1) For pass-thru MSI interrupts, interrupt source is not programmed. 2) For DM emulated device MSI interrupts, interrupt is not delivered. 3) For IPIs, it will work only if the sender and destination are both in x2APIC mode. Tracked-On: #3253 Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
101 lines
2.1 KiB
C
101 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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/* 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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}
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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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schedule();
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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) != 0) {
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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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