X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmx.c;h=0395b6ef53d0272177630f9b4e737225700ad51e;hp=19f831291a99b000b3ad14650514de683f132548;hb=1316eb77b6d89245583446dab3345f749c415764;hpb=7b22bd6ad6a5bb413fd38e9ed7df668e34c052bb diff --git a/palacios/src/palacios/vmx.c b/palacios/src/palacios/vmx.c index 19f8312..0395b6e 100644 --- a/palacios/src/palacios/vmx.c +++ b/palacios/src/palacios/vmx.c @@ -20,24 +20,24 @@ */ -/* Eventually we want to get rid of these */ - -#include -#include -#include -/* ** */ - #include #include #include + + +// +// +// CRUFT +// +// + + + #include #include -extern void Get_MSR(unsigned int msr, uint_t * high, uint_t * low); -extern void Set_MSR(unsigned int msr, uint_t high, uint_t low); -extern int Enable_VMX(ullong_t regionPtr); -extern int cpuid_ecx(unsigned int op); + extern int Launch_VM(ullong_t vmcsPtr, uint_t eip); #define NUMPORTS 65536 @@ -52,9 +52,8 @@ extern int Launch_VM(ullong_t vmcsPtr, uint_t eip); static struct VM theVM; -static uint_t GetLinearIP(struct VM *vm) -{ - if (vm->state==VM_VMXASSIST_V8086_BIOS || vm->state==VM_VMXASSIST_V8086) { +static uint_t GetLinearIP(struct VM * vm) { + if (vm->state == VM_VMXASSIST_V8086_BIOS || vm->state == VM_VMXASSIST_V8086) { return vm->vmcs.guestStateArea.cs.baseAddr + vm->vmcs.guestStateArea.rip; } else { return vm->vmcs.guestStateArea.rip; @@ -62,10 +61,6 @@ static uint_t GetLinearIP(struct VM *vm) } -static void VMXPanic() -{ - while (1) {} -} #define MAX_CODE 512 @@ -77,120 +72,10 @@ static void VMXPanic() uint_t oldesp=0; uint_t myregs=0; -// simply execute the instruction that is faulting and return -static int ExecFaultingInstructionInVMM(struct VM *vm) -{ - uint_t address = GetLinearIP(vm); - myregs = (uint_t)&(vm->registers); - - PrintTrace("About the execute faulting instruction!\n"); - PrintTrace("Instruction is:\n"); - PrintTraceMemDump((void*)(address),vm->vmcs.exitInfoFields.instrLength); - - PrintTrace("The template code is:\n"); - PrintTraceMemDump(&&template_code,TEMPLATE_CODE_LEN); - // clone the template code - //memcpy(&&template_code,code,MAX_CODE); - - // clean up the nop field - memset(&&template_code+INSTR_OFFSET_START,*((uchar_t *)(&&template_code+0)),NOP_SEQ_LEN); - // overwrite the nops with the faulting instruction - memcpy(&&template_code+INSTR_OFFSET_START, (void*)(address),vm->vmcs.exitInfoFields.instrLength); - - PrintTrace("Finished modifying the template code, which now is:\n"); - PrintTraceMemDump(&&template_code,TEMPLATE_CODE_LEN); - - PrintTrace("Now entering modified template code\n"); - - - template_code: - // Template code stores current registers, - // restores registers, has a landing pad of noops - // that will be modified, restores current regs, and then returns - // - // Note that this currently ignores cr0, cr3, cr4, dr7, rsp, rip, and rflags - // it also blythly assumes it can exec the instruction in protected mode - // - __asm__ __volatile__ ("nop\n" // for cloning purposes (1 byte) - "pusha\n" // push our current regs onto the current stack (1 byte) - "movl %0, %%eax\n" // Get oldesp location (5 bytes) - "movl %%esp, (%%eax)\n" // store the current stack pointer in oldesp (2 bytes) - "movl %1, %%eax\n" // Get regs location (5 bytes) - "movl (%%eax), %%esp\n" // point esp at regs (2 bytes) - "popa\n" // now we have the VM registers restored (1 byte) - "nop\n" // now we execute the actual instruction (1 byte x 10) - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - "nop\n" // now we execute the actual instruction - // need to copy back to the VM registers! - "movl %0, %%eax\n" // recapture oldesp location (5 bytes) - "movl (%%eax), %%esp\n" // now we'll get our esp back from oldesp (2 bytes) - "popa\n" // and restore our GP regs and we're done (1 byte) - : "=m"(oldesp) - : "m"(myregs) - ); - - PrintTrace("Survived executing the faulting instruction and returning.\n"); - - vm->vmcs.guestStateArea.rip += vm->vmcs.exitInfoFields.instrLength; - return 0; - -} - - -int is_vmx_capable() { - uint_t ret; - union VMX_MSR featureMSR; - - ret = cpuid_ecx(1); - if (ret & CPUID_1_ECX_VTXFLAG) { - Get_MSR(IA32_FEATURE_CONTROL_MSR, &featureMSR.regs.high, &featureMSR.regs.low); - - PrintTrace("MSRREGlow: 0x%.8x\n", featureMSR.regs.low); - - if ((featureMSR.regs.low & FEATURE_CONTROL_VALID) != FEATURE_CONTROL_VALID) { - PrintDebug("VMX is locked -- enable in the BIOS\n"); - return 0; - } - } else { - PrintDebug("VMX not supported on this cpu\n"); - return 0; - } - - return 1; - -} - - -VmxOnRegion * Init_VMX() { - uint_t ret; - VmxOnRegion * region = NULL; - - - region = CreateVmxOnRegion(); - - - ret = Enable_VMX((ullong_t)((uint_t)region)); - if (ret == 0) { - PrintDebug("VMX Enabled\n"); - } else { - PrintDebug("VMX failure (ret = %d)\n", ret); - } - - theVM.vmxonregion = region; - - return region; -} extern uint_t VMCS_CLEAR(); extern uint_t VMCS_LOAD(); @@ -200,206 +85,13 @@ extern uint_t VMCS_RESUME(); extern uint_t Init_VMCS_HostState(); extern uint_t Init_VMCS_GuestState(); -void SetCtrlBitsCorrectly(int msrno, int vmcsno) -{ - uint_t reserved =0; - union VMX_MSR msr; - - PrintTrace("SetCtrlBitsCorrectly(%x,%x)\n", msrno, vmcsno); - Get_MSR(msrno, &msr.regs.high, &msr.regs.low); - PrintTrace("MSR %x = %x : %x \n", msrno, msr.regs.high, msr.regs.low); - reserved = msr.regs.low; - reserved &= msr.regs.high; - VMCS_WRITE(vmcsno, &reserved); -} - -void SetCRBitsCorrectly(int msr0no, int msr1no, int vmcsno) -{ - uint_t reserved =0; - union VMX_MSR msr0, msr1; - - PrintTrace("SetCRBitsCorrectly(%x,%x,%x)\n",msr0no,msr1no,vmcsno); - Get_MSR(msr0no, &msr0.regs.high, &msr0.regs.low); - Get_MSR(msr1no, &msr1.regs.high, &msr1.regs.low); - PrintTrace("MSR %x = %x, %x = %x \n", msr0no, msr0.regs.low, msr1no, msr1.regs.low); - reserved = msr0.regs.low; - reserved &= msr1.regs.low; - VMCS_WRITE(vmcsno, &reserved); -} extern int Get_CR2(); extern int vmRunning; -static int PanicUnhandledVMExit(struct VM *vm) -{ - PrintInfo("Panicking due to VMExit with reason %u\n", vm->vmcs.exitInfoFields.reason); - PrintTrace("Panicking due to VMExit with reason %u\n", vm->vmcs.exitInfoFields.reason); - PrintTrace_VMCS_ALL(); - PrintTrace_VMX_Regs(&(vm->registers)); - VMXPanic(); - return 0; -} - - -static int HandleVMPrintsAndPanics(struct VM *vm, uint_t port, uint_t data) -{ - if (port==VMXASSIST_INFO_PORT && - (vm->state == VM_VMXASSIST_STARTUP || - vm->state == VM_VMXASSIST_V8086_BIOS || - vm->state == VM_VMXASSIST_V8086)) { - // Communication channel from VMXAssist - PrintTrace("VMXASSIST Output Port\n"); - PrintDebug("%c",data&0xff); - return 1; - } - - if ((port==ROMBIOS_PANIC_PORT || - port==ROMBIOS_PANIC_PORT2 || - port==ROMBIOS_DEBUG_PORT || - port==ROMBIOS_INFO_PORT) && - (vm->state==VM_VMXASSIST_V8086_BIOS)) { - // rombios is communicating - PrintTrace("ROMBIOS Output Port\n"); - // PrintDebug("%c",data&0xff); - return 1; - } - - if (port==BOOT_STATE_CARD_PORT && vm->state==VM_VMXASSIST_V8086_BIOS) { - // rombios is sending something to the display card - PrintTrace("Hex Display: 0x%x\n",data&0xff); - return 1; - } - return 0; -} - -static int HandleInOutExit(struct VM *vm) -{ - uint_t address; - - struct VMCSExitInfoFields *exitinfo = &(vm->vmcs.exitInfoFields); - struct VMExitIOQual * qual = (struct VMExitIOQual *)&(vm->vmcs.exitInfoFields.qualification); - struct VMXRegs *regs = &(vm->registers); - - address=GetLinearIP(vm); - - PrintTrace("Handling Input/Output Instruction Exit\n"); - - PrintTrace_VMX_Regs(regs); - - PrintTrace("Qualifications=0x%x\n", exitinfo->qualification); - PrintTrace("Reason=0x%x\n", exitinfo->reason); - PrintTrace("IO Port: 0x%x (%d)\n", qual->port, qual->port); - PrintTrace("Instruction Info=%x\n", exitinfo->instrInfo); - PrintTrace("%x : %s %s %s instruction of length %d for %d bytes from/to port 0x%x\n", - address, - qual->dir == 0 ? "output" : "input", - qual->string ==0 ? "nonstring" : "STRING", - qual->REP == 0 ? "with no rep" : "WITH REP", - exitinfo->instrLength, - qual->accessSize==0 ? 1 : qual->accessSize==1 ? 2 : 4, - qual->port); - - if ((qual->port == PIC_MASTER_CMD_ISR_PORT) || - (qual->port == PIC_MASTER_IMR_PORT) || - (qual->port == PIC_SLAVE_CMD_ISR_PORT) || - (qual->port == PIC_SLAVE_IMR_PORT)) { - PrintTrace( "PIC Access\n"); - } - - - if ((qual->dir == 1) && (qual->REP == 0) && (qual->string == 0)) { - char byte = In_Byte(qual->port); - - vm->vmcs.guestStateArea.rip += exitinfo->instrLength; - regs->eax = (regs->eax & 0xffffff00) | byte; - PrintTrace("Returning 0x%x in eax\n", (regs->eax)); - } - - if (qual->dir==0 && qual->REP==0 && qual->string==0) { - // See if we need to handle the outb as a signal or - // print from the VM - if (HandleVMPrintsAndPanics(vm,qual->port,regs->eax)) { - } else { - // If not, just go ahead and do the outb - Out_Byte(qual->port,regs->eax); - PrintTrace("Wrote 0x%x to port\n",(regs->eax)); - } - vm->vmcs.guestStateArea.rip += exitinfo->instrLength; - } - - return 0; -} - - -static int HandleExternalIRQExit(struct VM *vm) -{ - struct VMCSExitInfoFields * exitinfo = &(vm->vmcs.exitInfoFields); - struct VMExitIntInfo * intInfo = (struct VMExitIntInfo *)&(vm->vmcs.exitInfoFields.intInfo); - - PrintTrace("External Interrupt captured\n"); - PrintTrace("IntInfo: %x\n", exitinfo->intInfo); - - - if (!intInfo->valid) { - // interrupts are off, but this interrupt is not acknoledged (still pending) - // so we turn on interrupts to deliver appropriately in the - // host - PrintTrace("External Interrupt is invald. Turning Interrupts back on\n"); - asm("sti"); - return 0; - } - - // At this point, interrupts are off and the interrupt has been - // acknowledged. We will now handle the interrupt ourselves - // and turn interrupts back on in the host - - PrintTrace("type: %d\n", intInfo->type); - PrintTrace("number: %d\n", intInfo->nr); - - PrintTrace("Interrupt %d occuring now and handled by HandleExternalIRQExit\n",intInfo->nr); - - switch (intInfo->type) { - case 0: { // ext. IRQ - // In the following, we construct an "int x" instruction - // where x is the specific interrupt number that is raised - // then we execute that instruciton - // because we are in host context, that means it is delivered as normal - // through the host IDT - - ((char*)(&&ext_int_seq_start))[1] = intInfo->nr; - - PrintTrace("Interrupt instruction setup done %x\n", *((ushort_t *)(&&ext_int_seq_start))); - -ext_int_seq_start: - asm("int $0"); - } - - break; - case 2: // NMI - PrintTrace("Type: NMI\n"); - break; - case 3: // hw exception - PrintTrace("Type: HW Exception\n"); - break; - case 4: // sw exception - PrintTrace("Type: SW Exception\n"); - break; - default: - PrintTrace("Invalid Interrupt Type\n"); - return -1; - } - - if (intInfo->valid && intInfo->errorCode) { - PrintTrace("IntError: %x\n", exitinfo->intErrorCode); - } - - - return 0; - -} @@ -433,12 +125,12 @@ void DecodeCurrentInstruction(struct VM *vm, struct Instruction *inst) static void V8086ModeSegmentRegisterFixup(struct VM *vm) { - vm->vmcs.guestStateArea.cs.baseAddr=vm->vmcs.guestStateArea.cs.selector<<4; - vm->vmcs.guestStateArea.es.baseAddr=vm->vmcs.guestStateArea.es.selector<<4; - vm->vmcs.guestStateArea.ss.baseAddr=vm->vmcs.guestStateArea.ss.selector<<4; - vm->vmcs.guestStateArea.ds.baseAddr=vm->vmcs.guestStateArea.ds.selector<<4; - vm->vmcs.guestStateArea.fs.baseAddr=vm->vmcs.guestStateArea.fs.selector<<4; - vm->vmcs.guestStateArea.gs.baseAddr=vm->vmcs.guestStateArea.gs.selector<<4; + vm->vmcs.guestStateArea.cs.baseAddr = vm->vmcs.guestStateArea.cs.selector << 4; + vm->vmcs.guestStateArea.es.baseAddr = vm->vmcs.guestStateArea.es.selector << 4; + vm->vmcs.guestStateArea.ss.baseAddr = vm->vmcs.guestStateArea.ss.selector << 4; + vm->vmcs.guestStateArea.ds.baseAddr = vm->vmcs.guestStateArea.ds.selector << 4; + vm->vmcs.guestStateArea.fs.baseAddr = vm->vmcs.guestStateArea.fs.selector << 4; + vm->vmcs.guestStateArea.gs.baseAddr = vm->vmcs.guestStateArea.gs.selector << 4; } static void SetupV8086ModeForBoot(struct VM *vm) @@ -454,27 +146,27 @@ static void SetupV8086ModeForBoot(struct VM *vm) // reset vm->vmcs.guestStateArea.rip = 0xfff0; // note, 16 bit rip vm->vmcs.guestStateArea.cs.selector = 0xf000; - vm->vmcs.guestStateArea.cs.limit=0xffff; + vm->vmcs.guestStateArea.cs.limit = 0xffff; vm->vmcs.guestStateArea.cs.access.as_dword = 0xf3; vm->vmcs.guestStateArea.ss.selector = 0x0000; - vm->vmcs.guestStateArea.ss.limit=0xffff; + vm->vmcs.guestStateArea.ss.limit = 0xffff; vm->vmcs.guestStateArea.ss.access.as_dword = 0xf3; vm->vmcs.guestStateArea.ds.selector = 0x0000; - vm->vmcs.guestStateArea.ds.limit=0xffff; + vm->vmcs.guestStateArea.ds.limit = 0xffff; vm->vmcs.guestStateArea.ds.access.as_dword = 0xf3; vm->vmcs.guestStateArea.es.selector = 0x0000; - vm->vmcs.guestStateArea.es.limit=0xffff; + vm->vmcs.guestStateArea.es.limit = 0xffff; vm->vmcs.guestStateArea.es.access.as_dword = 0xf3; vm->vmcs.guestStateArea.fs.selector = 0x0000; - vm->vmcs.guestStateArea.fs.limit=0xffff; + vm->vmcs.guestStateArea.fs.limit = 0xffff; vm->vmcs.guestStateArea.fs.access.as_dword = 0xf3; vm->vmcs.guestStateArea.gs.selector = 0x0000; - vm->vmcs.guestStateArea.gs.limit=0xffff; + vm->vmcs.guestStateArea.gs.limit = 0xffff; vm->vmcs.guestStateArea.gs.access.as_dword = 0xf3; V8086ModeSegmentRegisterFixup(vm); @@ -485,265 +177,6 @@ static void SetupV8086ModeForBoot(struct VM *vm) -static int HandleExceptionOrNMI(struct VM *vm) -{ - struct Instruction inst; - uint_t num; - uint_t type; - uint_t errorvalid; - uint_t error; - uint_t ext=0; - uint_t idt=0; - uint_t ti=0; - uint_t selectorindex=0; - - PrintTrace("Exception or NMI occurred\n"); - - num=vm->vmcs.exitInfoFields.intInfo & 0xff; - type=(vm->vmcs.exitInfoFields.intInfo & 0x700)>>8; - errorvalid=(vm->vmcs.exitInfoFields.intInfo & 0x800)>>11; - if (errorvalid) { - error=vm->vmcs.exitInfoFields.intErrorCode; - ext=error&0x1; - idt=(error&0x2)>>1; - ti=(error&0x4)>>2; - selectorindex=(error>>3)&0xffff; - } - - PrintTrace("Exception %d now - handled by HandleExceptionOrNMI\n",num); - - PrintTrace("Exception Number %u : %s\n", num, exception_names[num]); - PrintTrace("Exception Type %u : %s\n", type, exception_type_names[type]); - if (errorvalid) { - if (ext) { - PrintTrace("External\n"); - } else { - PrintTrace("%s - Selector Index is %u\n", idt ? "IDT" : ti ? "LDT" : "GDT", selectorindex); - } - } - - DecodeCurrentInstruction(vm,&inst); - - if (inst.type==VM_MOV_TO_CR0) { - PrintTrace("MOV TO CR0, oldvalue=0x%x, newvalue=0x%x\n",inst.input2, inst.input1); - if ((inst.input2 & CR0_PE) && !(inst.input1 & CR0_PE) && vm->state==VM_VMXASSIST_STARTUP) { - // This is VMXAssist signalling for us to turn on V8086 mode and - // jump into the bios - PrintTrace("VMXAssist is signaling us for switch to V8086 mode and jump to 0xf000:fff0\n"); - SetupV8086ModeForBoot(vm); - goto leave; - } else { - PrintTrace("Instruction is a write to CR0, but we don't understand it so we'll just exec it\n"); - } - } - - - PrintTrace("Trying to execute the faulting instruction in VMM context now\n"); - ExecFaultingInstructionInVMM(vm); - - leave: - // - //PanicUnhandledVMExit(vmcs,regs); - //VMXPanic(); - return 0; -} - - -static struct VM *FindVM() -{ - return &theVM; -} - - -int Do_VMM(struct VMXRegs regs) -{ - - ullong_t vmcs_ptr = 0; - uint_t vmcs_ptr_low = 0; - int ret = 0; - uint_t vmx_abort = 0; - - - - PrintTrace("Vm Exit\n"); - ret = VMCS_STORE(&vmcs_ptr); - vmcs_ptr &= 0xffffffff; - vmcs_ptr_low += vmcs_ptr; - - - - - PrintTrace("ret=%d\n", ret); - PrintTrace("Revision: %x\n", *(uint_t *)(vmcs_ptr_low)); - vmx_abort = *(uint_t*)(((char *)vmcs_ptr_low)+4); - - struct VM *vm = FindVM(); - - if (vmx_abort != 0) { - PrintTrace("VM ABORTED w/ code: %x\n", vmx_abort); - return -1; - } - - vm->registers = regs; - - if (CopyOutVMCSData(&(vm->vmcs)) != 0) { - PrintTrace("Could not copy out VMCS\n"); - return -1; - } - - - PrintTrace("Guest esp: 0x%x (%u)\n", vm->vmcs.guestStateArea.rsp, vm->vmcs.guestStateArea.rsp); - - PrintTrace("VM Exit for reason: %d (%x)\n", - vm->vmcs.exitInfoFields.reason & 0x00000fff, - vm->vmcs.exitInfoFields.reason); - - if (vm->vmcs.exitInfoFields.reason & (0x1<<29) ) { - PrintTrace("VM Exit is from VMX root operation. Panicking\n"); - VMXPanic(); - } - - if (vm->vmcs.exitInfoFields.reason & (0x1<<31) ) { - PrintTrace("VM Exit is due to a VM entry failure. Shouldn't happen here. Panicking\n"); - PrintTrace_VMCSData(&(vm->vmcs)); - VMXPanic(); - } - - switch (vm->vmcs.exitInfoFields.reason) { - case VM_EXIT_REASON_INFO_EXCEPTION_OR_NMI: - ret = HandleExceptionOrNMI(vm); - break; - case VM_EXIT_REASON_EXTERNAL_INTR: - ret = HandleExternalIRQExit(vm); - break; - case VM_EXIT_REASON_TRIPLE_FAULT: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_INIT_SIGNAL: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_STARTUP_IPI: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_IO_SMI: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_OTHER_SMI: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_INTR_WINDOW: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_NMI_WINDOW: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_TASK_SWITCH: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_CPUID: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_INVD: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_INVLPG: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_RDPMC: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_RDTSC: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_RSM: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMCALL: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMCLEAR: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMLAUNCH: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMPTRLD: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMPTRST: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMREAD: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMRESUME: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMWRITE: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMXOFF: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_VMXON: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_CR_REG_ACCESSES: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_MOV_DR: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_IO_INSTR: - ret = HandleInOutExit(vm); - break; - case VM_EXIT_REASON_RDMSR: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_WRMSR: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_ENTRY_FAIL_INVALID_GUEST_STATE: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_ENTRY_FAIL_MSR_LOAD: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_MWAIT: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_MONITOR: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_PAUSE: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_ENTRY_FAILURE_MACHINE_CHECK: - ret = PanicUnhandledVMExit(vm); - break; - case VM_EXIT_REASON_TPR_BELOW_THRESHOLD: - ret = PanicUnhandledVMExit(vm); - break; - default: - ret = PanicUnhandledVMExit(vm); - break; - } - - - regs = vm->registers; - CopyInVMCSData(&(vm->vmcs)); - - /* - { - VMCS_CLEAR(vmcs_ptr); - } - */ - - PrintTrace("Returning from Do_VMM: %d\n", ret); - - return ret; -} - static void ConfigureExits(struct VM *vm) { @@ -753,17 +186,17 @@ static void ConfigureExits(struct VM *vm) // EXTERNAL_INTERRUPT_EXITING | NMI_EXITING; vm->vmcs.execCtrlFields.procCtrls |= 0 - // INTERRUPT_WINDOWS_EXIT - | USE_TSC_OFFSETTING - | HLT_EXITING - |INVLPG_EXITING - |MWAIT_EXITING - |RDPMC_EXITING - |RDTSC_EXITING - |MOVDR_EXITING - |UNCONDITION_IO_EXITING - |MONITOR_EXITING - |PAUSE_EXITING ; + // INTERRUPT_WINDOWS_EXIT + | USE_TSC_OFFSETTING + | HLT_EXITING + | INVLPG_EXITING + | MWAIT_EXITING + | RDPMC_EXITING + | RDTSC_EXITING + | MOVDR_EXITING + | UNCONDITION_IO_EXITING + | MONITOR_EXITING + | PAUSE_EXITING ; CopyInVMCSExecCtrlFields(&(vm->vmcs.execCtrlFields)); @@ -888,43 +321,212 @@ int VMLaunch(struct VMDescriptor *vm) int rc; ullong_t vmcs_ptr = (ullong_t)((uint_t)vmcs); - uint_t top = (vmcs_ptr>>32)&0xffffffff; - uint_t bottom = (vmcs_ptr)&0xffffffff; + uint_t top = (vmcs_ptr >> 32) & 0xffffffff; + uint_t bottom = (vmcs_ptr) & 0xffffffff; theVM.vmcsregion = vmcs; theVM.descriptor = *vm; PrintTrace("vmcs_ptr_top=%x vmcs_ptr_bottom=%x, eip=%x\n", top, bottom, vm->entry_ip); - rc=MyLaunch(&theVM); // vmcs_ptr, vm->entry_ip, vm->exit_eip, vm->guest_esp); + rc = MyLaunch(&theVM); // vmcs_ptr, vm->entry_ip, vm->exit_eip, vm->guest_esp); PrintTrace("Returned from MyLaunch();\n"); return rc; } -VmxOnRegion * CreateVmxOnRegion() { - union VMX_MSR basicMSR; - VmxOnRegion * region = (VmxOnRegion *)(os_hooks)->allocate_pages(1); - Get_MSR(IA32_VMX_BASIC_MSR, &basicMSR.regs.high, &basicMSR.regs.low); - // memcpy(region, &basicMSR.vmxBasic.revision, sizeof(uint_t)); - *(ulong_t*)region = basicMSR.vmxBasic.revision; +// +// +// END CRUFT +// +// + + +// For the 32 bit reserved bit fields +// MB1s are in the low 32 bits, MBZs are in the high 32 bits of the MSR +static uint32_t sanitize_bits1(uint32_t msr_num, uint32_t val) { + v3_msr_t mask_msr; + + PrintDebug("sanitize_bits1 (MSR:%x)\n", msr_num); + + v3_get_msr(msr_num, &mask_msr.hi, &mask_msr.lo); + + PrintDebug("MSR %x = %x : %x \n", msr_num, msr.hi, msr.lo); + + val &= mask_msr.lo; + val &= mask_msr.hi; + + return val; +} + + +static addr_t sanitize_bits2(uint32_t msr_num0, uint32_t msr_num1, addr_t val) { + v3_msr_t msr0, msr1; + addr_t msr0_val, msr1_val; + + PrintDebug("sanitize_bits2 (MSR0=%x, MSR1=%x)\n", msr_num0, msr_num1); + + v3_get_msr(msr_num0, &msr0.hi, &msr0.lo); + v3_get_msr(msr_num1, &msr1.hi, &msr1.lo); + + // This generates a mask that is the natural bit width of the CPU + msr0_val = msr0.value; + msr1_val = msr1.value; + + PrintDebug("MSR %x = %p, %x = %p \n", msr_num0, msr0_val, msr_num1, msr1_val); + + val &= msr0_val; + val &= msr1_val; + + return val; +} + + + +static vmcs_t * allocate_vmcs() { + reg_ex_t msr; + vmcs_t * vmcs_page = (vmcs_t *)V3_VAddr(V3_AllocPages(1)); + + memset(vmcb_page, 0, 4096); + + v3_get_msr(VMX_BASIC_MSR, &(msr.e_reg.high), &(msr.e_reg.low)); + + *(uint32_t *)vmcs_page = ((struct vmx_basic_msr *)msr.val)->revision; + + return vmcs_page; +} + + + +static void init_vmcs_bios(vmcs_t * vmcs, struct guest_info * vm_info) { + +} + + + +static int init_vmx_guest(struct guest_info * info, struct v3_vm_config * config_ptr) { + v3_pre_config_guest(info, config_ptr); + + PrintDebug("Allocating VMCS\n"); + info->vmm_data = (void *)allocate_vmcs(); + + PrintDebug("Initializing VMCS (addr=%p)\n", (void *)info->vmm_data); + init_vmcs_bios((vmcs_t *)(info->vmm_data), info); + + v3_post_config_guest(info, config_ptr); + + return 0; +} + + + + +static int start_svm_guest(struct guest_info *info) { + return -1; +} + + + + + + +int v3_is_vmx_capable() { + uint_t ret; + v3_msr_t feature_msr; + addr_t eax = 0, ebx = 0, ecx = 0, edx = 0; + + v3_cpuid(CPUID_FEATURE_IDS, &eax, &ebx, &ecx, &edx); + + if (ecx & CPUID_1_ECX_VTXFLAG) { + v3_get_msr(IA32_FEATURE_CONTROL_MSR, &(feature_msr.hi), &(feature_msr.lo)); + + PrintTrace("MSRREGlow: 0x%.8x\n", feature_msr.lo); + + if ((feature_msr.lo & FEATURE_CONTROL_VALID) != FEATURE_CONTROL_VALID) { + PrintDebug("VMX is locked -- enable in the BIOS\n"); + return 0; + } + + } else { + PrintDebug("VMX not supported on this cpu\n"); + return 0; + } + + return 1; + +} + +static int has_vmx_nested_paging() { + return 0; +} + + + +// We set up the global host state that is unlikely to change across processes here +// Segment Descriptors mainly + +struct seg_descriptor { + +}; + + +static int setup_base_host_state() { + uint8_t gdt[10]; + + + + vmwrite(HOST_IDTR_BASE, - PrintInfo("VMX revision: 0x%lu\n", *(ulong_t *)region); - return region; } -VMCS * CreateVMCS() { - union VMX_MSR basicMSR; - VMCS * vmcs = (VMCS *)(os_hooks)->allocate_pages(1); - Get_MSR(IA32_VMX_BASIC_MSR, &basicMSR.regs.high, &basicMSR.regs.low); - *(ulong_t *)vmcs = basicMSR.vmxBasic.revision; - *(ulong_t *)((char*)vmcs + 4) = 0; - PrintTrace("VMCS Region size: %u\n", basicMSR.vmxBasic.regionSize); - PrintTrace("VMCS Abort: %x\n",*(uint_t *)(((char*)vmcs)+4)); +void v3_init_vmx(struct v3_ctrl_ops * vm_ops) { + v3_msr_t basic_msr; + + // Setup the host state save area + void * host_state = V3_AllocPages(1); + + v3_get_msr(VMX_BASIC_MSR, &(basic_msr.hi), &(basic_msr.lo)); + + *(uint32_t *)host_state = ((struct vmx_basic_msr *)basic_msr.value)->revision; + + PrintDebug("VMX revision: 0x%p\n", host_state); + + __asm__ __volatile__ ( + "movl %%cr4, %%ebx; " + "orl %%ebx, 0x00002000; " + "movl %%ebx, %%cr4" + ); + + + + // Should check and return Error here.... + __asm__ __volatile__ ( + "movl %%cr0, %%ebx; " + "orl %%ebx, 0x00000020; " + "movl %%ebx, %%cr0" + ); + + + if (v3_enable_vmx(host_state) == 0) { + PrintDebug("VMX Enabled\n"); + } else { + PrintDebug("VMX initialization failure\n"); + } + + + if (has_vmx_nested_paging() == 1) { + v3_cpu_type = V3_VMX_EPT_CPU; + } else { + v3_cpu_type = V3_VMX_CPU; + } + + // Setup the VMX specific vmm operations + vmm_ops->init_guest = &init_vmx_guest; + vmm_ops->start_guest = &start_vmx_guest; + vmm_ops->has_nested_paging = &has_vmx_nested_paging; - return vmcs; }