mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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69627ad7b6
renamed: arch/x86/guest/io_emul.c -> arch/x86/guest/vmx_io.c renamed: include/arch/x86/guest/io_emul.h -> include/arch/x86/guest/vmx_io.h Tracked-On: #1842 Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com> Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
365 lines
11 KiB
C
365 lines
11 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 <types.h>
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#include <errno.h>
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#include <vmx.h>
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#include <irq.h>
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#include <mmu.h>
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#include <vcpu.h>
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#include <vm.h>
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#include <vmexit.h>
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#include <vmx_io.h>
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#include <ept.h>
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#include <vtd.h>
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#include <vcpuid.h>
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#include <trace.h>
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/*
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* According to "SDM APPENDIX C VMX BASIC EXIT REASONS",
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* there are 65 Basic Exit Reasons.
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*/
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#define NR_VMX_EXIT_REASONS 65U
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static int32_t unhandled_vmexit_handler(struct acrn_vcpu *vcpu);
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static int32_t xsetbv_vmexit_handler(struct acrn_vcpu *vcpu);
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static int32_t wbinvd_vmexit_handler(struct acrn_vcpu *vcpu);
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static int32_t undefined_vmexit_handler(struct acrn_vcpu *vcpu);
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static int32_t init_signal_vmexit_handler(__unused struct acrn_vcpu *vcpu);
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/* VM Dispatch table for Exit condition handling */
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static const struct vm_exit_dispatch dispatch_table[NR_VMX_EXIT_REASONS] = {
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[VMX_EXIT_REASON_EXCEPTION_OR_NMI] = {
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.handler = exception_vmexit_handler},
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[VMX_EXIT_REASON_EXTERNAL_INTERRUPT] = {
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.handler = external_interrupt_vmexit_handler},
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[VMX_EXIT_REASON_TRIPLE_FAULT] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INIT_SIGNAL] = {
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.handler = init_signal_vmexit_handler},
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[VMX_EXIT_REASON_STARTUP_IPI] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_IO_SMI] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_OTHER_SMI] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INTERRUPT_WINDOW] = {
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.handler = interrupt_window_vmexit_handler},
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[VMX_EXIT_REASON_NMI_WINDOW] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_TASK_SWITCH] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_CPUID] = {
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.handler = cpuid_vmexit_handler},
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[VMX_EXIT_REASON_GETSEC] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_HLT] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INVD] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INVLPG] = {
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.handler = unhandled_vmexit_handler,},
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[VMX_EXIT_REASON_RDPMC] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_RDTSC] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_RSM] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_VMCALL] = {
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.handler = vmcall_vmexit_handler},
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[VMX_EXIT_REASON_VMCLEAR] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMLAUNCH] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMPTRLD] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMPTRST] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMREAD] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMRESUME] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMWRITE] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMXOFF] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_VMXON] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_CR_ACCESS] = {
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.handler = cr_access_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_DR_ACCESS] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_IO_INSTRUCTION] = {
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.handler = pio_instr_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_RDMSR] = {
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.handler = rdmsr_vmexit_handler},
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[VMX_EXIT_REASON_WRMSR] = {
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.handler = wrmsr_vmexit_handler},
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[VMX_EXIT_REASON_ENTRY_FAILURE_INVALID_GUEST_STATE] = {
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.handler = unhandled_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_ENTRY_FAILURE_MSR_LOADING] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_MWAIT] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_MONITOR_TRAP] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_MONITOR] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_PAUSE] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_ENTRY_FAILURE_MACHINE_CHECK] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_TPR_BELOW_THRESHOLD] = {
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.handler = tpr_below_threshold_vmexit_handler},
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[VMX_EXIT_REASON_APIC_ACCESS] = {
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.handler = apic_access_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_VIRTUALIZED_EOI] = {
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.handler = veoi_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_GDTR_IDTR_ACCESS] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_LDTR_TR_ACCESS] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_EPT_VIOLATION] = {
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.handler = ept_violation_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_EPT_MISCONFIGURATION] = {
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.handler = ept_misconfig_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_INVEPT] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_RDTSCP] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_VMX_PREEMPTION_TIMER_EXPIRED] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INVVPID] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_WBINVD] = {
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.handler = wbinvd_vmexit_handler},
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[VMX_EXIT_REASON_XSETBV] = {
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.handler = xsetbv_vmexit_handler},
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[VMX_EXIT_REASON_APIC_WRITE] = {
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.handler = apic_write_vmexit_handler,
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.need_exit_qualification = 1},
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[VMX_EXIT_REASON_RDRAND] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_INVPCID] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_VMFUNC] = {
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.handler = undefined_vmexit_handler},
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[VMX_EXIT_REASON_ENCLS] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_RDSEED] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_PAGE_MODIFICATION_LOG_FULL] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_XSAVES] = {
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.handler = unhandled_vmexit_handler},
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[VMX_EXIT_REASON_XRSTORS] = {
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.handler = unhandled_vmexit_handler}
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};
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int32_t vmexit_handler(struct acrn_vcpu *vcpu)
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{
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struct vm_exit_dispatch *dispatch = NULL;
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uint16_t basic_exit_reason;
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int32_t ret;
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if (get_cpu_id() != vcpu->pcpu_id) {
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pr_fatal("vcpu is not running on its pcpu!");
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ret = -EINVAL;
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} else {
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/* Obtain interrupt info */
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vcpu->arch.idt_vectoring_info = exec_vmread32(VMX_IDT_VEC_INFO_FIELD);
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/* Filter out HW exception & NMI */
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if ((vcpu->arch.idt_vectoring_info & VMX_INT_INFO_VALID) != 0U) {
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uint32_t vector_info = vcpu->arch.idt_vectoring_info;
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uint32_t vector = vector_info & 0xffU;
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uint32_t type = (vector_info & VMX_INT_TYPE_MASK) >> 8U;
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uint32_t err_code = 0U;
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if (type == VMX_INT_TYPE_HW_EXP) {
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if ((vector_info & VMX_INT_INFO_ERR_CODE_VALID) != 0U) {
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err_code = exec_vmread32(VMX_IDT_VEC_ERROR_CODE);
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}
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(void)vcpu_queue_exception(vcpu, vector, err_code);
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vcpu->arch.idt_vectoring_info = 0U;
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} else if (type == VMX_INT_TYPE_NMI) {
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vcpu_make_request(vcpu, ACRN_REQUEST_NMI);
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vcpu->arch.idt_vectoring_info = 0U;
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} else {
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/* No action on EXT_INT or SW exception. */
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}
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}
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/* Calculate basic exit reason (low 16-bits) */
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basic_exit_reason = (uint16_t)(vcpu->arch.exit_reason & 0xFFFFU);
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/* Log details for exit */
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pr_dbg("Exit Reason: 0x%016llx ", vcpu->arch.exit_reason);
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/* Ensure exit reason is within dispatch table */
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if (basic_exit_reason >= ARRAY_SIZE(dispatch_table)) {
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pr_err("Invalid Exit Reason: 0x%016llx ", vcpu->arch.exit_reason);
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ret = -EINVAL;
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} else {
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/* Calculate dispatch table entry */
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dispatch = (struct vm_exit_dispatch *)(dispatch_table + basic_exit_reason);
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/* See if an exit qualification is necessary for this exit handler */
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if (dispatch->need_exit_qualification != 0U) {
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/* Get exit qualification */
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vcpu->arch.exit_qualification = exec_vmread(VMX_EXIT_QUALIFICATION);
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}
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/* exit dispatch handling */
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if (basic_exit_reason == VMX_EXIT_REASON_EXTERNAL_INTERRUPT) {
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/* Handling external_interrupt should disable intr */
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CPU_IRQ_DISABLE();
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ret = dispatch->handler(vcpu);
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CPU_IRQ_ENABLE();
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} else {
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ret = dispatch->handler(vcpu);
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}
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}
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}
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return ret;
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}
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static int32_t unhandled_vmexit_handler(struct acrn_vcpu *vcpu)
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{
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pr_fatal("Error: Unhandled VM exit condition from guest at 0x%016llx ",
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exec_vmread(VMX_GUEST_RIP));
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pr_fatal("Exit Reason: 0x%016llx ", vcpu->arch.exit_reason);
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pr_err("Exit qualification: 0x%016llx ",
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exec_vmread(VMX_EXIT_QUALIFICATION));
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TRACE_2L(TRACE_VMEXIT_UNHANDLED, vcpu->arch.exit_reason, 0UL);
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return 0;
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}
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int32_t cpuid_vmexit_handler(struct acrn_vcpu *vcpu)
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{
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uint64_t rax, rbx, rcx, rdx;
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rax = vcpu_get_gpreg(vcpu, CPU_REG_RAX);
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rbx = vcpu_get_gpreg(vcpu, CPU_REG_RBX);
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rcx = vcpu_get_gpreg(vcpu, CPU_REG_RCX);
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rdx = vcpu_get_gpreg(vcpu, CPU_REG_RDX);
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guest_cpuid(vcpu, (uint32_t *)&rax, (uint32_t *)&rbx,
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(uint32_t *)&rcx, (uint32_t *)&rdx);
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vcpu_set_gpreg(vcpu, CPU_REG_RAX, rax);
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vcpu_set_gpreg(vcpu, CPU_REG_RBX, rbx);
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vcpu_set_gpreg(vcpu, CPU_REG_RCX, rcx);
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vcpu_set_gpreg(vcpu, CPU_REG_RDX, rdx);
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TRACE_2L(TRACE_VMEXIT_CPUID, (uint64_t)vcpu->vcpu_id, 0UL);
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return 0;
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}
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/*
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* XSETBV instruction set's the XCR0 that is used to tell for which
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* components states can be saved on a context switch using xsave.
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*/
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static int32_t xsetbv_vmexit_handler(struct acrn_vcpu *vcpu)
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{
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int32_t idx;
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uint64_t val64;
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int32_t ret = 0;
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val64 = exec_vmread(VMX_GUEST_CR4);
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if ((val64 & CR4_OSXSAVE) == 0UL) {
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vcpu_inject_gp(vcpu, 0U);
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} else {
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idx = vcpu->arch.cur_context;
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if (idx >= NR_WORLD) {
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ret = -1;
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} else {
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/* to access XCR0,'rcx' should be 0 */
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if (vcpu_get_gpreg(vcpu, CPU_REG_RCX) != 0UL) {
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vcpu_inject_gp(vcpu, 0U);
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} else {
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val64 = (vcpu_get_gpreg(vcpu, CPU_REG_RAX) & 0xffffffffUL) |
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(vcpu_get_gpreg(vcpu, CPU_REG_RDX) << 32U);
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/* bit 0(x87 state) of XCR0 can't be cleared */
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if ((val64 & 0x01UL) == 0UL) {
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vcpu_inject_gp(vcpu, 0U);
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} else {
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/*
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* XCR0[2:1] (SSE state & AVX state) can't not be
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* set to 10b as it is necessary to set both bits
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* to use AVX instructions.
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*/
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if ((val64 & (XCR0_SSE | XCR0_AVX)) == XCR0_AVX) {
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vcpu_inject_gp(vcpu, 0U);
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} else {
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/*
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* SDM Vol.1 13-4, XCR0[4:3] are associated with MPX state,
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* Guest should not set these two bits without MPX support.
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*/
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if ((val64 & (XCR0_BNDREGS | XCR0_BNDCSR)) != 0UL) {
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vcpu_inject_gp(vcpu, 0U);
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} else {
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write_xcr(0, val64);
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}
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}
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}
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}
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}
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}
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return ret;
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}
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static int32_t wbinvd_vmexit_handler(struct acrn_vcpu *vcpu)
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{
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if (!iommu_snoop_supported(vcpu->vm->iommu)) {
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cache_flush_invalidate_all();
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}
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return 0;
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}
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/* vmexit handler for just injecting a #UD exception
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*
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* ACRN doesn't support nested virtualization, the following VMExit will inject #UD
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* VMCLEAR/VMLAUNCH/VMPTRST/VMREAD/VMRESUME/VMWRITE/VMXOFF/VMXON.
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* ACRN doesn't enable VMFUNC, VMFUNC treated as undefined.
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*/
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static int32_t undefined_vmexit_handler(struct acrn_vcpu *vcpu)
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{
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vcpu_inject_ud(vcpu);
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return 0;
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}
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/*
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* This handler is only triggered by INIT signal when poweroff from inside of RTVM
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*/
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static int32_t init_signal_vmexit_handler(__unused struct acrn_vcpu *vcpu)
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{
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/*
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* Intel SDM Volume 3, 25.2:
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* INIT signals. INIT signals cause VM exits. A logical processer performs none
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* of the operations normally associated with these events. Such exits do not modify
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* register state or clear pending events as they would outside of VMX operation (If
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* a logical processor is the wait-for-SIPI state, INIT signals are blocked. They do
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* not cause VM exits in this case).
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*
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* So, it is safe to ignore the signal and reture here.
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*/
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return 0;
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}
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