/* * This file is part of the Palacios Virtual Machine Monitor developed * by the V3VEE Project with funding from the United States National * Science Foundation and the Department of Energy. * * The V3VEE Project is a joint project between Northwestern University * and the University of New Mexico. You can find out more at * http://www.v3vee.org * * Copyright (c) 2008, Jack Lange * Copyright (c) 2008, The V3VEE Project * All rights reserved. * * Author: Jack Lange * * This is free software. You are permitted to use, * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef V3_CONFIG_DEBUG_VMX #undef PrintDebug #define PrintDebug(fmt, args...) #endif #ifdef V3_CONFIG_TELEMETRY #include #endif /* At this point the GPRs are already copied into the guest_info state */ int v3_handle_vmx_exit(struct guest_info * info, struct vmx_exit_info * exit_info) { struct vmx_basic_exit_info * basic_info = (struct vmx_basic_exit_info *)&(exit_info->exit_reason); /* PrintError(info->vm_info, info, "Handling VMX_EXIT: %s (%u), %lu (0x%lx)\n", v3_vmx_exit_code_to_str(exit_info->exit_reason), exit_info->exit_reason, exit_info->exit_qual, exit_info->exit_qual); v3_print_vmcs(); */ if (basic_info->entry_error == 1) { switch (basic_info->reason) { case VMX_EXIT_INVALID_GUEST_STATE: PrintError(info->vm_info, info, "VM Entry failed due to invalid guest state\n"); PrintError(info->vm_info, info, "Printing VMCS: (NOTE: This VMCS may not belong to the correct guest)\n"); v3_print_vmcs(); break; case VMX_EXIT_INVALID_MSR_LOAD: PrintError(info->vm_info, info, "VM Entry failed due to error loading MSRs\n"); break; default: PrintError(info->vm_info, info, "Entry failed for unknown reason (%d)\n", basic_info->reason); break; } return -1; } #ifdef V3_CONFIG_TELEMETRY if (info->vm_info->enable_telemetry) { v3_telemetry_start_exit(info); } #endif switch (basic_info->reason) { case VMX_EXIT_INFO_EXCEPTION_OR_NMI: { pf_error_t error_code = *(pf_error_t *)&(exit_info->int_err); // JRL: Change "0x0e" to a macro value if ((uint8_t)exit_info->int_info == 14) { #ifdef V3_CONFIG_DEBUG_SHADOW_PAGING PrintDebug(info->vm_info, info, "Page Fault at %p error_code=%x\n", (void *)exit_info->exit_qual, *(uint32_t *)&error_code); #endif if (info->shdw_pg_mode == SHADOW_PAGING) { if (v3_handle_shadow_pagefault(info, (addr_t)exit_info->exit_qual, error_code) == -1) { PrintError(info->vm_info, info, "Error handling shadow page fault\n"); return -1; } } else { PrintError(info->vm_info, info, "Page fault in unimplemented paging mode\n"); return -1; } } else if ((uint8_t)exit_info->int_info == 2) { // NMI. Don't do anything } else { PrintError(info->vm_info, info, "Unknown exception: 0x%x\n", (uint8_t)exit_info->int_info); v3_print_GPRs(info); return -1; } break; } case VMX_EXIT_EPT_VIOLATION: { struct ept_exit_qual * ept_qual = (struct ept_exit_qual *)&(exit_info->exit_qual); if (v3_handle_nested_pagefault(info, exit_info->ept_fault_addr, ept_qual,NULL,NULL) == -1) { PrintError(info->vm_info, info, "Error handling EPT fault\n"); return -1; } break; } case VMX_EXIT_INVLPG: if (info->shdw_pg_mode == SHADOW_PAGING) { if (v3_handle_shadow_invlpg(info) == -1) { PrintError(info->vm_info, info, "Error handling INVLPG\n"); return -1; } } break; case VMX_EXIT_RDTSC: #ifdef V3_CONFIG_DEBUG_TIME PrintDebug(info->vm_info, info, "RDTSC\n"); #endif if (v3_handle_rdtsc(info) == -1) { PrintError(info->vm_info, info, "Error Handling RDTSC instruction\n"); return -1; } break; case VMX_EXIT_CPUID: if (v3_handle_cpuid(info) == -1) { PrintError(info->vm_info, info, "Error Handling CPUID instruction\n"); return -1; } break; case VMX_EXIT_RDMSR: if (v3_handle_msr_read(info) == -1) { PrintError(info->vm_info, info, "Error handling MSR Read\n"); return -1; } break; case VMX_EXIT_WRMSR: if (v3_handle_msr_write(info) == -1) { PrintError(info->vm_info, info, "Error handling MSR Write\n"); return -1; } break; case VMX_EXIT_VMCALL: /* * Hypercall */ // VMCALL is a 3 byte op // We do this early because some hypercalls can change the rip... info->rip += 3; if (v3_handle_hypercall(info) == -1) { return -1; } break; case VMX_EXIT_IO_INSTR: { struct vmx_exit_io_qual * io_qual = (struct vmx_exit_io_qual *)&(exit_info->exit_qual); if (io_qual->dir == 0) { if (io_qual->string) { if (v3_handle_vmx_io_outs(info, exit_info) == -1) { PrintError(info->vm_info, info, "Error in outs IO handler\n"); return -1; } } else { if (v3_handle_vmx_io_out(info, exit_info) == -1) { PrintError(info->vm_info, info, "Error in out IO handler\n"); return -1; } } } else { if (io_qual->string) { if(v3_handle_vmx_io_ins(info, exit_info) == -1) { PrintError(info->vm_info, info, "Error in ins IO handler\n"); return -1; } } else { if (v3_handle_vmx_io_in(info, exit_info) == -1) { PrintError(info->vm_info, info, "Error in in IO handler\n"); return -1; } } } break; } case VMX_EXIT_CR_REG_ACCESSES: { struct vmx_exit_cr_qual * cr_qual = (struct vmx_exit_cr_qual *)&(exit_info->exit_qual); // PrintDebug(info->vm_info, info, "Control register: %d\n", cr_qual->access_type); switch(cr_qual->cr_id) { case 0: //PrintDebug(info->vm_info, info, "Handling CR0 Access\n"); if (v3_vmx_handle_cr0_access(info, cr_qual, exit_info) == -1) { PrintError(info->vm_info, info, "Error in CR0 access handler\n"); return -1; } break; case 3: //PrintDebug(info->vm_info, info, "Handling CR3 Access\n"); if (v3_vmx_handle_cr3_access(info, cr_qual) == -1) { PrintError(info->vm_info, info, "Error in CR3 access handler\n"); return -1; } break; case 4: //PrintDebug(info->vm_info, info, "Handling CR4 Access\n"); if (v3_vmx_handle_cr4_access(info, cr_qual) == -1) { PrintError(info->vm_info, info, "Error in CR4 access handler\n"); return -1; } break; case 8: if (v3_vmx_handle_cr8_access(info, cr_qual) == -1) { PrintError(info->vm_info, info, "Error in CR8 access handler\n"); return -1; } break; default: PrintError(info->vm_info, info, "Unhandled CR access: %d\n", cr_qual->cr_id); return -1; } // TODO: move RIP increment into all of the above individual CR // handlers, not just v3_vmx_handle_cr4_access() if (cr_qual->cr_id != 4) info->rip += exit_info->instr_len; break; } case VMX_EXIT_HLT: PrintDebug(info->vm_info, info, "Guest halted\n"); if (v3_handle_halt(info) == -1) { PrintError(info->vm_info, info, "Error handling halt instruction\n"); return -1; } break; case VMX_EXIT_MONITOR: PrintDebug(info->vm_info, info, "Guest Executing monitor\n"); if (v3_handle_monitor(info) == -1) { PrintError(info->vm_info, info, "Error handling monitor instruction\n"); return -1; } break; case VMX_EXIT_MWAIT: PrintDebug(info->vm_info, info, "Guest Executing mwait\n"); if (v3_handle_mwait(info) == -1) { PrintError(info->vm_info, info, "Error handling mwait instruction\n"); return -1; } break; case VMX_EXIT_PAUSE: // Handled as NOP info->rip += 2; break; case VMX_EXIT_EXTERNAL_INTR: // Interrupts are handled outside switch break; case VMX_EXIT_INTR_WINDOW: // This is handled in the atomic part of the vmx code, // not in the generic (interruptable) vmx handler break; case VMX_EXIT_EXPIRED_PREEMPT_TIMER: V3_Print(info->vm_info, info, "VMX Preempt Timer Expired.\n"); // This just forces an exit and is handled outside the switch break; default: PrintError(info->vm_info, info, "Unhandled VMX_EXIT: %s (%u), %lu (0x%lx)\n", v3_vmx_exit_code_to_str(basic_info->reason), basic_info->reason, exit_info->exit_qual, exit_info->exit_qual); return -1; } #ifdef V3_CONFIG_TELEMETRY if (info->vm_info->enable_telemetry) { v3_telemetry_end_exit(info, exit_info->exit_reason); } #endif return 0; } static const char VMX_EXIT_INFO_EXCEPTION_OR_NMI_STR[] = "VMX_EXIT_INFO_EXCEPTION_OR_NMI"; static const char VMX_EXIT_EXTERNAL_INTR_STR[] = "VMX_EXIT_EXTERNAL_INTR"; static const char VMX_EXIT_TRIPLE_FAULT_STR[] = "VMX_EXIT_TRIPLE_FAULT"; static const char VMX_EXIT_INIT_SIGNAL_STR[] = "VMX_EXIT_INIT_SIGNAL"; static const char VMX_EXIT_STARTUP_IPI_STR[] = "VMX_EXIT_STARTUP_IPI"; static const char VMX_EXIT_IO_SMI_STR[] = "VMX_EXIT_IO_SMI"; static const char VMX_EXIT_OTHER_SMI_STR[] = "VMX_EXIT_OTHER_SMI"; static const char VMX_EXIT_INTR_WINDOW_STR[] = "VMX_EXIT_INTR_WINDOW"; static const char VMX_EXIT_NMI_WINDOW_STR[] = "VMX_EXIT_NMI_WINDOW"; static const char VMX_EXIT_TASK_SWITCH_STR[] = "VMX_EXIT_TASK_SWITCH"; static const char VMX_EXIT_CPUID_STR[] = "VMX_EXIT_CPUID"; static const char VMX_EXIT_HLT_STR[] = "VMX_EXIT_HLT"; static const char VMX_EXIT_INVD_STR[] = "VMX_EXIT_INVD"; static const char VMX_EXIT_INVLPG_STR[] = "VMX_EXIT_INVLPG"; static const char VMX_EXIT_RDPMC_STR[] = "VMX_EXIT_RDPMC"; static const char VMX_EXIT_RDTSC_STR[] = "VMX_EXIT_RDTSC"; static const char VMX_EXIT_RSM_STR[] = "VMX_EXIT_RSM"; static const char VMX_EXIT_VMCALL_STR[] = "VMX_EXIT_VMCALL"; static const char VMX_EXIT_VMCLEAR_STR[] = "VMX_EXIT_VMCLEAR"; static const char VMX_EXIT_VMLAUNCH_STR[] = "VMX_EXIT_VMLAUNCH"; static const char VMX_EXIT_VMPTRLD_STR[] = "VMX_EXIT_VMPTRLD"; static const char VMX_EXIT_VMPTRST_STR[] = "VMX_EXIT_VMPTRST"; static const char VMX_EXIT_VMREAD_STR[] = "VMX_EXIT_VMREAD"; static const char VMX_EXIT_VMRESUME_STR[] = "VMX_EXIT_VMRESUME"; static const char VMX_EXIT_VMWRITE_STR[] = "VMX_EXIT_VMWRITE"; static const char VMX_EXIT_VMXOFF_STR[] = "VMX_EXIT_VMXOFF"; static const char VMX_EXIT_VMXON_STR[] = "VMX_EXIT_VMXON"; static const char VMX_EXIT_CR_REG_ACCESSES_STR[] = "VMX_EXIT_CR_REG_ACCESSES"; static const char VMX_EXIT_MOV_DR_STR[] = "VMX_EXIT_MOV_DR"; static const char VMX_EXIT_IO_INSTR_STR[] = "VMX_EXIT_IO_INSTR"; static const char VMX_EXIT_RDMSR_STR[] = "VMX_EXIT_RDMSR"; static const char VMX_EXIT_WRMSR_STR[] = "VMX_EXIT_WRMSR"; static const char VMX_EXIT_INVALID_GUEST_STATE_STR[] = "VMX_EXIT_INVALID_GUEST_STATE"; static const char VMX_EXIT_INVALID_MSR_LOAD_STR[] = "VMX_EXIT_INVALID_MSR_LOAD"; static const char VMX_EXIT_MWAIT_STR[] = "VMX_EXIT_MWAIT"; static const char VMX_EXIT_MONITOR_STR[] = "VMX_EXIT_MONITOR"; static const char VMX_EXIT_PAUSE_STR[] = "VMX_EXIT_PAUSE"; static const char VMX_EXIT_INVALID_MACHINE_CHECK_STR[] = "VMX_EXIT_INVALIDE_MACHINE_CHECK"; static const char VMX_EXIT_TPR_BELOW_THRESHOLD_STR[] = "VMX_EXIT_TPR_BELOW_THRESHOLD"; static const char VMX_EXIT_APIC_STR[] = "VMX_EXIT_APIC"; static const char VMX_EXIT_GDTR_IDTR_STR[] = "VMX_EXIT_GDTR_IDTR"; static const char VMX_EXIT_LDTR_TR_STR[] = "VMX_EXIT_LDTR_TR"; static const char VMX_EXIT_EPT_VIOLATION_STR[] = "VMX_EXIT_EPT_VIOLATION"; static const char VMX_EXIT_EPT_CONFIG_STR[] = "VMX_EXIT_EPT_CONFIG"; static const char VMX_EXIT_INVEPT_STR[] = "VMX_EXIT_INVEPT"; static const char VMX_EXIT_RDTSCP_STR[] = "VMX_EXIT_RDTSCP"; static const char VMX_EXIT_EXPIRED_PREEMPT_TIMER_STR[] = "VMX_EXIT_EXPIRED_PREEMPT_TIMER"; static const char VMX_EXIT_INVVPID_STR[] = "VMX_EXIT_INVVPID"; static const char VMX_EXIT_WBINVD_STR[] = "VMX_EXIT_WBINVD"; static const char VMX_EXIT_XSETBV_STR[] = "VMX_EXIT_XSETBV"; const char * v3_vmx_exit_code_to_str(vmx_exit_t exit) { switch (exit) { case VMX_EXIT_INFO_EXCEPTION_OR_NMI: return VMX_EXIT_INFO_EXCEPTION_OR_NMI_STR; case VMX_EXIT_EXTERNAL_INTR: return VMX_EXIT_EXTERNAL_INTR_STR; case VMX_EXIT_TRIPLE_FAULT: return VMX_EXIT_TRIPLE_FAULT_STR; case VMX_EXIT_INIT_SIGNAL: return VMX_EXIT_INIT_SIGNAL_STR; case VMX_EXIT_STARTUP_IPI: return VMX_EXIT_STARTUP_IPI_STR; case VMX_EXIT_IO_SMI: return VMX_EXIT_IO_SMI_STR; case VMX_EXIT_OTHER_SMI: return VMX_EXIT_OTHER_SMI_STR; case VMX_EXIT_INTR_WINDOW: return VMX_EXIT_INTR_WINDOW_STR; case VMX_EXIT_NMI_WINDOW: return VMX_EXIT_NMI_WINDOW_STR; case VMX_EXIT_TASK_SWITCH: return VMX_EXIT_TASK_SWITCH_STR; case VMX_EXIT_CPUID: return VMX_EXIT_CPUID_STR; case VMX_EXIT_HLT: return VMX_EXIT_HLT_STR; case VMX_EXIT_INVD: return VMX_EXIT_INVD_STR; case VMX_EXIT_INVLPG: return VMX_EXIT_INVLPG_STR; case VMX_EXIT_RDPMC: return VMX_EXIT_RDPMC_STR; case VMX_EXIT_RDTSC: return VMX_EXIT_RDTSC_STR; case VMX_EXIT_RSM: return VMX_EXIT_RSM_STR; case VMX_EXIT_VMCALL: return VMX_EXIT_VMCALL_STR; case VMX_EXIT_VMCLEAR: return VMX_EXIT_VMCLEAR_STR; case VMX_EXIT_VMLAUNCH: return VMX_EXIT_VMLAUNCH_STR; case VMX_EXIT_VMPTRLD: return VMX_EXIT_VMPTRLD_STR; case VMX_EXIT_VMPTRST: return VMX_EXIT_VMPTRST_STR; case VMX_EXIT_VMREAD: return VMX_EXIT_VMREAD_STR; case VMX_EXIT_VMRESUME: return VMX_EXIT_VMRESUME_STR; case VMX_EXIT_VMWRITE: return VMX_EXIT_VMWRITE_STR; case VMX_EXIT_VMXOFF: return VMX_EXIT_VMXOFF_STR; case VMX_EXIT_VMXON: return VMX_EXIT_VMXON_STR; case VMX_EXIT_CR_REG_ACCESSES: return VMX_EXIT_CR_REG_ACCESSES_STR; case VMX_EXIT_MOV_DR: return VMX_EXIT_MOV_DR_STR; case VMX_EXIT_IO_INSTR: return VMX_EXIT_IO_INSTR_STR; case VMX_EXIT_RDMSR: return VMX_EXIT_RDMSR_STR; case VMX_EXIT_WRMSR: return VMX_EXIT_WRMSR_STR; case VMX_EXIT_INVALID_GUEST_STATE: return VMX_EXIT_INVALID_GUEST_STATE_STR; case VMX_EXIT_INVALID_MSR_LOAD: return VMX_EXIT_INVALID_MSR_LOAD_STR; case VMX_EXIT_MWAIT: return VMX_EXIT_MWAIT_STR; case VMX_EXIT_MONITOR: return VMX_EXIT_MONITOR_STR; case VMX_EXIT_PAUSE: return VMX_EXIT_PAUSE_STR; case VMX_EXIT_INVALID_MACHINE_CHECK: return VMX_EXIT_INVALID_MACHINE_CHECK_STR; case VMX_EXIT_TPR_BELOW_THRESHOLD: return VMX_EXIT_TPR_BELOW_THRESHOLD_STR; case VMX_EXIT_APIC: return VMX_EXIT_APIC_STR; case VMX_EXIT_GDTR_IDTR: return VMX_EXIT_GDTR_IDTR_STR; case VMX_EXIT_LDTR_TR: return VMX_EXIT_LDTR_TR_STR; case VMX_EXIT_EPT_VIOLATION: return VMX_EXIT_EPT_VIOLATION_STR; case VMX_EXIT_EPT_CONFIG: return VMX_EXIT_EPT_CONFIG_STR; case VMX_EXIT_INVEPT: return VMX_EXIT_INVEPT_STR; case VMX_EXIT_RDTSCP: return VMX_EXIT_RDTSCP_STR; case VMX_EXIT_EXPIRED_PREEMPT_TIMER: return VMX_EXIT_EXPIRED_PREEMPT_TIMER_STR; case VMX_EXIT_INVVPID: return VMX_EXIT_INVVPID_STR; case VMX_EXIT_WBINVD: return VMX_EXIT_WBINVD_STR; case VMX_EXIT_XSETBV: return VMX_EXIT_XSETBV_STR; } return NULL; }