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https://github.com/projectacrn/acrn-hypervisor.git
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9e917057e9
This patch fixes incorrect vm_id captured when sampling PMU data. Currently, the vm_id gets attributed to ACRN hypervisor, rather than actual guest vm_id. The issue is identified that the existing code captures the guest vm info after vmexit_hander function is completed, in which the profiling module points its context to VMM. When the vmexit happens by PMI, the guest context should be captured so that the attribution to proper guest vm can happen. This change will also allow to capture more accurate TSC when vmexit happens. Tracked-On: #2043 Signed-off-by: Min Lim <min.yeol.lim@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
91 lines
2.0 KiB
C
91 lines
2.0 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 acrn_vcpu *vcpu)
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{
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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) != 0) {
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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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TRACE_2L(TRACE_VM_ENTER, 0UL, 0UL);
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profiling_vmenter_handler(vcpu);
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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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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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basic_exit_reason = vcpu->arch.exit_reason & 0xFFFFU;
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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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TRACE_2L(TRACE_VM_EXIT, basic_exit_reason, vcpu_get_rip(vcpu));
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profiling_post_vmexit_handler(vcpu);
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} while (1);
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}
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