X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmx.c;h=93b3c1602385f32cf017dfd261ac0516e76c08bd;hb=f1d8183ae8c4390dfc74cb2780dd2058c569fc57;hp=df610fa759752916e894e2329f3f2a9414a4c9b4;hpb=0ab69a6bdddef0ae09d8beb82b9c6c051e1a564d;p=palacios.git diff --git a/palacios/src/palacios/vmx.c b/palacios/src/palacios/vmx.c index df610fa..93b3c16 100644 --- a/palacios/src/palacios/vmx.c +++ b/palacios/src/palacios/vmx.c @@ -27,337 +27,67 @@ #include #include #include +#include +static addr_t vmxon_ptr_phys; +extern int v3_vmx_exit_handler(); +extern int v3_vmx_vmlaunch(struct v3_gprs * vm_regs); -// -// -// CRUFT -// -// - -#if 0 - -#include -#include -#include - - - -extern int Launch_VM(ullong_t vmcsPtr, uint_t eip); - -#define NUMPORTS 65536 - - -#define VMXASSIST_INFO_PORT 0x0e9 -#define ROMBIOS_PANIC_PORT 0x400 -#define ROMBIOS_PANIC_PORT2 0x401 -#define ROMBIOS_INFO_PORT 0x402 -#define ROMBIOS_DEBUG_PORT 0x403 - - - -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; - } -} - - - - -#define MAX_CODE 512 -#define INSTR_OFFSET_START 17 -#define NOP_SEQ_LEN 10 -#define INSTR_OFFSET_END (INSTR_OFFSET_START + NOP_SEQ_LEN - 1) -#define TEMPLATE_CODE_LEN 35 - -uint_t oldesp = 0; -uint_t myregs = 0; - - - - - -extern uint_t VMCS_LAUNCH(); -extern uint_t Init_VMCS_HostState(); -extern uint_t Init_VMCS_GuestState(); - - - - -extern int Get_CR2(); -extern int vmRunning; - - - - - -void DecodeCurrentInstruction(struct VM *vm, struct Instruction *inst) -{ - // this is a gruesome hack - uint_t address = GetLinearIP(vm); - uint_t length = vm->vmcs.exitInfoFields.instrLength; - unsigned char *t = (unsigned char *) address; - - - - PrintTrace("DecodeCurrentInstruction: instruction is\n"); - PrintTraceMemDump(t,length); - - if (length==3 && t[0]==0x0f && t[1]==0x22 && t[2]==0xc0) { - // mov from eax to cr0 - // usually used to signal - inst->type=VM_MOV_TO_CR0; - inst->address=address; - inst->size=length; - inst->input1=vm->registers.eax; - inst->input2=vm->vmcs.guestStateArea.cr0; - inst->output=vm->registers.eax; - PrintTrace("MOV FROM EAX TO CR0\n"); - } else { - inst->type=VM_UNKNOWN_INST; - } -} - - - -static void ConfigureExits(struct VM *vm) +static int inline check_vmcs_write(vmcs_field_t field, addr_t val) { - CopyOutVMCSExecCtrlFields(&(vm->vmcs.execCtrlFields)); - - vm->vmcs.execCtrlFields.pinCtrls |= 0 - // 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 ; - - CopyInVMCSExecCtrlFields(&(vm->vmcs.execCtrlFields)); - - CopyOutVMCSExitCtrlFields(&(vm->vmcs.exitCtrlFields)); - - vm->vmcs.exitCtrlFields.exitCtrls |= ACK_IRQ_ON_EXIT; - - CopyInVMCSExitCtrlFields(&(vm->vmcs.exitCtrlFields)); - + int ret = 0; + ret = vmcs_write(field,val); -/* VMCS_READ(VM_EXIT_CTRLS, &flags); */ -/* flags |= ACK_IRQ_ON_EXIT; */ -/* VMCS_WRITE(VM_EXIT_CTRLS, &flags); */ -} - - -extern int RunVMM(); -extern int SAFE_VM_LAUNCH(); - -int MyLaunch(struct VM *vm) -{ - ullong_t vmcs = (ullong_t)((uint_t) (vm->vmcsregion)); - uint_t entry_eip = vm->descriptor.entry_ip; - uint_t exit_eip = vm->descriptor.exit_eip; - uint_t guest_esp = vm->descriptor.guest_esp; - uint_t f = 0xffffffff; - uint_t tmpReg = 0; - int ret; - int vmm_ret = 0; - - PrintTrace("Guest ESP: 0x%x (%u)\n", guest_esp, guest_esp); - - exit_eip = (uint_t)RunVMM; - - PrintTrace("Clear\n"); - VMCS_CLEAR(vmcs); - PrintTrace("Load\n"); - VMCS_LOAD(vmcs); - - - PrintTrace("VMCS_LINK_PTR\n"); - VMCS_WRITE(VMCS_LINK_PTR, &f); - PrintTrace("VMCS_LINK_PTR_HIGH\n"); - VMCS_WRITE(VMCS_LINK_PTR_HIGH, &f); - - - SetCtrlBitsCorrectly(IA32_VMX_PINBASED_CTLS_MSR, PIN_VM_EXEC_CTRLS); - SetCtrlBitsCorrectly(IA32_VMX_PROCBASED_CTLS_MSR, PROC_VM_EXEC_CTRLS); - SetCtrlBitsCorrectly(IA32_VMX_EXIT_CTLS_MSR, VM_EXIT_CTRLS); - SetCtrlBitsCorrectly(IA32_VMX_ENTRY_CTLS_MSR, VM_ENTRY_CTRLS); - - // - // - //SetCtrlBitsCorrectly(IA32_something,GUEST_IA32_DEBUGCTL); - //SetCtrlBitsCorrectly(IA32_something,GUEST_IA32_DEBUGCTL_HIGH); - - - /* Host state */ - PrintTrace("Setting up host state\n"); - SetCRBitsCorrectly(IA32_VMX_CR0_FIXED0_MSR, IA32_VMX_CR0_FIXED1_MSR, HOST_CR0); - SetCRBitsCorrectly(IA32_VMX_CR4_FIXED0_MSR, IA32_VMX_CR4_FIXED1_MSR, HOST_CR4); - ret = Init_VMCS_HostState(); - - if (ret != VMX_SUCCESS) { - if (ret == VMX_FAIL_VALID) { - PrintTrace("Init Host state: VMCS FAILED WITH ERROR\n"); - } else { - PrintTrace("Init Host state: Invalid VMCS\n"); + if (ret != VMX_SUCCESS) { + PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret); + return 1; } - return ret; - } - - // PrintTrace("HOST_RIP: %x (%u)\n", exit_eip, exit_eip); - VMCS_WRITE(HOST_RIP, &exit_eip); - - /* Guest state */ - PrintTrace("Setting up guest state\n"); - PrintTrace("GUEST_RIP: %x (%u)\n", entry_eip, entry_eip); - VMCS_WRITE(GUEST_RIP, &entry_eip); - - SetCRBitsCorrectly(IA32_VMX_CR0_FIXED0_MSR, IA32_VMX_CR0_FIXED1_MSR, GUEST_CR0); - SetCRBitsCorrectly(IA32_VMX_CR4_FIXED0_MSR, IA32_VMX_CR4_FIXED1_MSR, GUEST_CR4); - ret = Init_VMCS_GuestState(); - - PrintTrace("InitGuestState returned\n"); - - if (ret != VMX_SUCCESS) { - if (ret == VMX_FAIL_VALID) { - PrintTrace("Init Guest state: VMCS FAILED WITH ERROR\n"); - } else { - PrintTrace("Init Guest state: Invalid VMCS\n"); - } - return ret; - } - PrintTrace("GUEST_RSP: %x (%u)\n", guest_esp, (uint_t)guest_esp); - VMCS_WRITE(GUEST_RSP, &guest_esp); - - // tmpReg = 0x4100; - tmpReg = 0xffffffff; - if (VMCS_WRITE(EXCEPTION_BITMAP, &tmpReg) != VMX_SUCCESS) { - PrintInfo("Bitmap error\n"); - } - - ConfigureExits(vm); - - PrintTrace("VMCS_LAUNCH\n"); - - vm->state=VM_VMXASSIST_STARTUP; - vmm_ret = SAFE_VM_LAUNCH(); - - PrintTrace("VMM error %d\n", vmm_ret); - - return vmm_ret; -} - - - - -int VMLaunch(struct VMDescriptor *vm) -{ - VMCS * vmcs = CreateVMCS(); - int rc; - - ullong_t vmcs_ptr = (ullong_t)((uint_t)vmcs); - 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); - PrintTrace("Returned from MyLaunch();\n"); - return rc; + return 0; } - - - -// -// -// END CRUFT -// -// - -#endif - static int update_vmcs_host_state(struct guest_info * info) { + int vmx_ret = 0; addr_t tmp; - - struct { - uint16_t limit; - addr_t base; - } __attribute__((packed)) tmp_seg; - - + struct vmx_data * arch_data = (struct vmx_data *)(info->vmm_data); struct v3_msr tmp_msr; __asm__ __volatile__ ( "movq %%cr0, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_CR0, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_CR0, tmp); __asm__ __volatile__ ( "movq %%cr3, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_CR3, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_CR3, tmp); __asm__ __volatile__ ( "movq %%cr4, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_CR4, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_CR4, tmp); - - __asm__ __volatile__ ("sgdt (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_GDTR_BASE, tmp_seg.base); - - - __asm__ __volatile__ ("sidt (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_IDTR_BASE, tmp_seg.base); - - /* How do we handle this...? - __asm__ __volatile__ ("str (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_TR_BASE, tmp_seg.base); - */ + vmx_ret |= check_vmcs_write(VMCS_HOST_GDTR_BASE, arch_data->host_state.gdtr.base); + vmx_ret |= check_vmcs_write(VMCS_HOST_IDTR_BASE, arch_data->host_state.idtr.base); + vmx_ret |= check_vmcs_write(VMCS_HOST_TR_BASE, arch_data->host_state.tr.base); #define FS_BASE_MSR 0xc0000100 #define GS_BASE_MSR 0xc0000101 // FS.BASE MSR v3_get_msr(FS_BASE_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_FS_BASE, tmp_msr.value); + vmx_ret |= check_vmcs_write(VMCS_HOST_FS_BASE, tmp_msr.value); // GS.BASE MSR v3_get_msr(GS_BASE_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_GS_BASE, tmp_msr.value); + vmx_ret |= check_vmcs_write(VMCS_HOST_GS_BASE, tmp_msr.value); @@ -365,43 +95,39 @@ static int update_vmcs_host_state(struct guest_info * info) { : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_CS_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_CS_SELECTOR, tmp); __asm__ __volatile__ ( "movq %%ss, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_SS_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_SS_SELECTOR, tmp); __asm__ __volatile__ ( "movq %%ds, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_DS_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_DS_SELECTOR, tmp); __asm__ __volatile__ ( "movq %%es, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_ES_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_ES_SELECTOR, tmp); __asm__ __volatile__ ( "movq %%fs, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_FS_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_FS_SELECTOR, tmp); __asm__ __volatile__ ( "movq %%gs, %0; " : "=q"(tmp) : ); - vmcs_write(VMCS_HOST_GS_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_GS_SELECTOR, tmp); - __asm__ __volatile__ ( "str %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_TR_SELECTOR, tmp); + vmx_ret |= check_vmcs_write(VMCS_HOST_TR_SELECTOR, arch_data->host_state.tr.selector); #define SYSENTER_CS_MSR 0x00000174 @@ -410,29 +136,23 @@ static int update_vmcs_host_state(struct guest_info * info) { // SYSENTER CS MSR v3_get_msr(SYSENTER_CS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_CS, tmp_msr.value); + vmx_ret |= check_vmcs_write(VMCS_HOST_SYSENTER_CS, tmp_msr.lo); // SYSENTER_ESP MSR v3_get_msr(SYSENTER_ESP_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_ESP, tmp_msr.value); + vmx_ret |= check_vmcs_write(VMCS_HOST_SYSENTER_ESP, tmp_msr.value); // SYSENTER_EIP MSR v3_get_msr(SYSENTER_EIP_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_EIP, tmp_msr.value); + vmx_ret |= check_vmcs_write(VMCS_HOST_SYSENTER_EIP, tmp_msr.value); - - // RIP - // RSP - - return 0; + return vmx_ret; } -static struct vmcs_data* vmxon_ptr; - #if 0 // For the 32 bit reserved bit fields @@ -446,8 +166,8 @@ static uint32_t sanitize_bits1(uint32_t msr_num, uint32_t val) { PrintDebug("MSR %x = %x : %x \n", msr_num, mask_msr.hi, mask_msr.lo); - val &= mask_msr.lo; - val &= mask_msr.hi; + val |= mask_msr.lo; + val |= mask_msr.hi; return val; } @@ -469,8 +189,8 @@ static addr_t sanitize_bits2(uint32_t msr_num0, uint32_t msr_num1, addr_t val) { PrintDebug("MSR %x = %p, %x = %p \n", msr_num0, (void*)msr0_val, msr_num1, (void*)msr1_val); - val &= msr0_val; - val &= msr1_val; + val |= msr0_val; + val |= msr1_val; return val; } @@ -485,19 +205,119 @@ static int setup_base_host_state() { } +#endif + + +static void inline translate_segment_access(struct v3_segment * v3_seg, + struct vmcs_segment_access * access) +{ + access->type = v3_seg->type; + access->desc_type = v3_seg->system; + access->dpl = v3_seg->dpl; + access->present = v3_seg->present; + access->avail = v3_seg->avail; + access->long_mode = v3_seg->long_mode; + access->db = v3_seg->db; + access->granularity = v3_seg->granularity; +} -static void setup_v8086_mode_for_boot(struct guest_info* vm_info) +static int inline vmcs_write_guest_segments(struct guest_info* info) { + int ret = 0; + struct vmcs_segment_access access; + + memset(&access, 0, sizeof(access)); + + /* CS Segment */ + translate_segment_access(&(info->segments.cs), &access); + + ret |= check_vmcs_write(VMCS_GUEST_CS_BASE, info->segments.cs.base); + ret |= check_vmcs_write(VMCS_GUEST_CS_SELECTOR, info->segments.cs.selector); + ret |= check_vmcs_write(VMCS_GUEST_CS_LIMIT, info->segments.cs.limit); + ret |= check_vmcs_write(VMCS_GUEST_CS_ACCESS, access.value); + + /* SS Segment */ + translate_segment_access(&(info->segments.ss), &access); + + ret |= check_vmcs_write(VMCS_GUEST_SS_BASE, info->segments.ss.base); + ret |= check_vmcs_write(VMCS_GUEST_SS_SELECTOR, info->segments.ss.selector); + ret |= check_vmcs_write(VMCS_GUEST_SS_LIMIT, info->segments.ss.limit); + ret |= check_vmcs_write(VMCS_GUEST_SS_ACCESS, access.value); + + /* DS Segment */ + translate_segment_access(&(info->segments.ds), &access); + + ret |= check_vmcs_write(VMCS_GUEST_DS_BASE, info->segments.ds.base); + ret |= check_vmcs_write(VMCS_GUEST_DS_SELECTOR, info->segments.ds.selector); + ret |= check_vmcs_write(VMCS_GUEST_DS_LIMIT, info->segments.ds.limit); + ret |= check_vmcs_write(VMCS_GUEST_DS_ACCESS, access.value); + + + /* ES Segment */ + translate_segment_access(&(info->segments.es), &access); + + ret |= check_vmcs_write(VMCS_GUEST_ES_BASE, info->segments.es.base); + ret |= check_vmcs_write(VMCS_GUEST_ES_SELECTOR, info->segments.es.selector); + ret |= check_vmcs_write(VMCS_GUEST_ES_LIMIT, info->segments.es.limit); + ret |= check_vmcs_write(VMCS_GUEST_ES_ACCESS, access.value); + + /* FS Segment */ + translate_segment_access(&(info->segments.fs), &access); + + ret |= check_vmcs_write(VMCS_GUEST_FS_BASE, info->segments.fs.base); + ret |= check_vmcs_write(VMCS_GUEST_FS_SELECTOR, info->segments.fs.selector); + ret |= check_vmcs_write(VMCS_GUEST_FS_LIMIT, info->segments.fs.limit); + ret |= check_vmcs_write(VMCS_GUEST_FS_ACCESS, access.value); + + /* GS Segment */ + translate_segment_access(&(info->segments.gs), &access); + + ret |= check_vmcs_write(VMCS_GUEST_GS_BASE, info->segments.gs.base); + ret |= check_vmcs_write(VMCS_GUEST_GS_SELECTOR, info->segments.gs.selector); + ret |= check_vmcs_write(VMCS_GUEST_GS_LIMIT, info->segments.gs.limit); + ret |= check_vmcs_write(VMCS_GUEST_GS_ACCESS, access.value); + + /* LDTR segment */ + translate_segment_access(&(info->segments.ldtr), &access); + + ret |= check_vmcs_write(VMCS_GUEST_LDTR_BASE, info->segments.ldtr.base); + ret |= check_vmcs_write(VMCS_GUEST_LDTR_SELECTOR, info->segments.ldtr.selector); + ret |= check_vmcs_write(VMCS_GUEST_LDTR_LIMIT, info->segments.ldtr.limit); + ret |= check_vmcs_write(VMCS_GUEST_LDTR_ACCESS, access.value); + + /* TR Segment */ + translate_segment_access(&(info->segments.tr), &access); + + ret |= check_vmcs_write(VMCS_GUEST_TR_BASE, info->segments.tr.base); + ret |= check_vmcs_write(VMCS_GUEST_TR_SELECTOR, info->segments.ldtr.selector); + ret |= check_vmcs_write(VMCS_GUEST_TR_LIMIT, info->segments.tr.limit); + ret |= check_vmcs_write(VMCS_GUEST_TR_ACCESS, access.value); + + /* GDTR Segment */ + + ret |= check_vmcs_write(VMCS_GUEST_GDTR_BASE, info->segments.gdtr.base); + ret |= check_vmcs_write(VMCS_GUEST_GDTR_LIMIT, info->segments.gdtr.limit); + + /* IDTR Segment*/ + ret |= check_vmcs_write(VMCS_GUEST_IDTR_BASE, info->segments.idtr.base); + ret |= check_vmcs_write(VMCS_GUEST_IDTR_LIMIT, info->segments.idtr.limit); + + return ret; +} - ((struct vmx_data*)vm_info->vmm_data)->state = VMXASSIST_V8086_BIOS; - ((struct rflags*)&(vm_info->ctrl_regs.rflags))->vm = 1; - ((struct rflags*)&(vm_info->ctrl_regs.rflags))->iopl = 3; +static void setup_v8086_mode_for_boot(struct guest_info * vm_info) +{ + ((struct vmx_data *)vm_info->vmm_data)->state = VMXASSIST_V8086_BIOS; + ((struct rflags *)&(vm_info->ctrl_regs.rflags))->vm = 1; + ((struct rflags *)&(vm_info->ctrl_regs.rflags))->iopl = 3; - vm_info->rip = 0xfff0; + + vm_info->rip = 0xd0000; + vm_info->vm_regs.rsp = 0x80000; vm_info->segments.cs.selector = 0xf000; - vm_info->segments.cs.base = 0xf000<<4; + vm_info->segments.cs.base = 0xf000 << 4; vm_info->segments.cs.limit = 0xffff; vm_info->segments.cs.type = 3; vm_info->segments.cs.system = 1; @@ -505,50 +325,45 @@ static void setup_v8086_mode_for_boot(struct guest_info* vm_info) vm_info->segments.cs.present = 1; vm_info->segments.cs.granularity = 0; - vm_info->segments.ss.selector = 0x0000; - vm_info->segments.ss.base = 0x0000<<4; - vm_info->segments.ss.limit = 0xffff; - vm_info->segments.ss.type = 3; - vm_info->segments.ss.system = 1; - vm_info->segments.ss.dpl = 3; - vm_info->segments.ss.present = 1; - vm_info->segments.ss.granularity = 0; - - vm_info->segments.es.selector = 0x0000; - vm_info->segments.es.base = 0x0000<<4; - vm_info->segments.es.limit = 0xffff; - vm_info->segments.es.type = 3; - vm_info->segments.es.system = 1; - vm_info->segments.es.dpl = 3; - vm_info->segments.es.present = 1; - vm_info->segments.es.granularity = 0; - - vm_info->segments.fs.selector = 0x0000; - vm_info->segments.fs.base = 0x0000<<4; - vm_info->segments.fs.limit = 0xffff; - vm_info->segments.fs.type = 3; - vm_info->segments.fs.system = 1; - vm_info->segments.fs.dpl = 3; - vm_info->segments.fs.present = 1; - vm_info->segments.fs.granularity = 0; - - vm_info->segments.gs.selector = 0x0000; - vm_info->segments.gs.base = 0x0000<<4; - vm_info->segments.gs.limit = 0xffff; - vm_info->segments.gs.type = 3; - vm_info->segments.gs.system = 1; - vm_info->segments.gs.dpl = 3; - vm_info->segments.gs.present = 1; - vm_info->segments.gs.granularity = 0; + int i = 0; + struct v3_segment * seg_ptr = (struct v3_segment *)&(vm_info->segments); + + /* Set values for selectors ds through ss */ + for(i = 1; i < 6 ; i++) { + seg_ptr[i].selector = 0x0000; + seg_ptr[i].base = 0x00000; + seg_ptr[i].type = 3; + seg_ptr[i].system = 1; + seg_ptr[i].dpl = 3; + seg_ptr[i].present = 1; + seg_ptr[i].granularity = 0; + } + + for(i = 6; i < 10; i++) { + seg_ptr[i].base = 0x0; + seg_ptr[i].limit = 0xffff; + } + + vm_info->segments.ldtr.selector = 0x0; + vm_info->segments.ldtr.type = 2; + vm_info->segments.ldtr.system = 0; + vm_info->segments.ldtr.present = 1; + vm_info->segments.ldtr.granularity = 0; + + vm_info->segments.tr.selector = 0x0; + vm_info->segments.tr.type = 3; + vm_info->segments.tr.system = 0; + vm_info->segments.tr.present = 1; + vm_info->segments.tr.granularity = 0; } -#endif -static struct vmcs_data* allocate_vmcs() +static addr_t allocate_vmcs() { reg_ex_t msr; PrintDebug("Allocating page\n"); - struct vmcs_data* vmcs_page = (struct vmcs_data*)V3_VAddr(V3_AllocPages(1)); + struct vmcs_data * vmcs_page = (struct vmcs_data *)V3_VAddr(V3_AllocPages(1)); + memset(vmcs_page, 0, 4096); @@ -557,65 +372,191 @@ static struct vmcs_data* allocate_vmcs() vmcs_page->revision = ((struct vmx_basic_msr*)&msr)->revision; PrintDebug("VMX Revision: 0x%x\n",vmcs_page->revision); - return (struct vmcs_data*)V3_PAddr((void*)vmcs_page); + return (addr_t)V3_PAddr((void *)vmcs_page); } - -static void init_vmcs_bios(struct guest_info * vm_info) +static int init_vmcs_bios(struct guest_info * vm_info) { + setup_v8086_mode_for_boot(vm_info); -} + // TODO: Fix vmcs fields so they're 32-bit + struct vmx_data * vmx_data = (struct vmx_data *)vm_info->vmm_data; + int vmx_ret = 0; + + PrintDebug("Clearing VMCS: %p\n",(void*)vmx_data->vmcs_ptr_phys); + vmx_ret = vmcs_clear(vmx_data->vmcs_ptr_phys); + + if (vmx_ret != VMX_SUCCESS) { + PrintError("VMCLEAR failed\n"); + return -1; + } + + PrintDebug("Loading VMCS\n"); + vmx_ret = vmcs_load(vmx_data->vmcs_ptr_phys); + + if (vmx_ret != VMX_SUCCESS) { + PrintError("VMPTRLD failed\n"); + return -1; + } + + struct v3_msr tmp_msr; + + /* Write VMX Control Fields */ + v3_get_msr(VMX_PINBASED_CTLS_MSR,&(tmp_msr.hi),&(tmp_msr.lo)); + /* Add NMI exiting */ + tmp_msr.lo |= NMI_EXIT; + check_vmcs_write(VMCS_PIN_CTRLS, tmp_msr.lo); + + v3_get_msr(VMX_PROCBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + /* Add unconditional I/O */ + tmp_msr.lo |= UNCOND_IO_EXIT; + check_vmcs_write(VMCS_PROC_CTRLS, tmp_msr.lo); + + v3_get_msr(VMX_EXIT_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + tmp_msr.lo |= HOST_ADDR_SPACE_SIZE; + check_vmcs_write(VMCS_EXIT_CTRLS, tmp_msr.lo); + + + v3_get_msr(VMX_ENTRY_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + check_vmcs_write(VMCS_ENTRY_CTRLS, tmp_msr.lo); + check_vmcs_write(VMCS_EXCP_BITMAP, 0xffffffff); + + /* Cache GDTR, IDTR, and TR in host struct */ + struct { + uint16_t selector; + addr_t base; + } __attribute__((packed)) tmp_seg; + + addr_t gdtr_base; + + __asm__ __volatile__( + "sgdt (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + gdtr_base = tmp_seg.base; + vmx_data->host_state.gdtr.base = gdtr_base; + + __asm__ __volatile__( + "sidt (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + vmx_data->host_state.idtr.base = tmp_seg.base; + + __asm__ __volatile__( + "str (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + vmx_data->host_state.tr.selector = tmp_seg.selector; + + /* The GDTR *index* is bits 3-15 of the selector. */ + struct tss_descriptor * desc = (struct tss_descriptor *) + (gdtr_base + 8*(tmp_seg.selector>>3)); + + tmp_seg.base = ( + (desc->base1) | + (desc->base2 << 16) | + (desc->base3 << 24) | +#ifdef __V3_64BIT__ + ((uint64_t)desc->base4 << 32) +#else + (0) +#endif + ); + + vmx_data->host_state.tr.base = tmp_seg.base; + + if(update_vmcs_host_state(vm_info)) { + PrintError("Could not write host state\n"); + return -1; + } + + // Setup guest state + // TODO: This is not 32-bit safe! + vmx_ret |= check_vmcs_write(VMCS_GUEST_RIP, vm_info->rip); + vmx_ret |= check_vmcs_write(VMCS_GUEST_RSP, vm_info->vm_regs.rsp); + vmx_ret |= check_vmcs_write(VMCS_GUEST_CR0, 0x80000021); + + vmx_ret |= vmcs_write_guest_segments(vm_info); + + vmx_ret |= check_vmcs_write(VMCS_GUEST_RFLAGS, vm_info->ctrl_regs.rflags); + vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, 0xffffffffffffffff); + + if (vmx_ret != 0) { + PrintError("Could not initialize VMCS segments\n"); + return -1; + } + +#define VMXASSIST_START 0x000d0000 + extern uint8_t vmxassist_start[]; + extern uint8_t vmxassist_end[]; + + addr_t vmxassist_dst = 0; + if(guest_pa_to_host_va(vm_info, VMXASSIST_START, &vmxassist_dst) == -1) { + PrintError("Could not find VMXASSIST destination\n"); + return -1; + } + memcpy((void*)vmxassist_dst, vmxassist_start, vmxassist_end-vmxassist_start); + + v3_print_vmcs_host_state(); + v3_print_vmcs_guest_state(); + return 0; +} static int init_vmx_guest(struct guest_info * info, struct v3_vm_config * config_ptr) { - PrintDebug("Entering init_vmx_guest\n"); v3_pre_config_guest(info, config_ptr); - struct vmx_data* data; + struct vmx_data * data = NULL; + + data = (struct vmx_data *)V3_Malloc(sizeof(struct vmx_data)); + + PrintDebug("vmx_data pointer: %p\n", (void *)data); - PrintDebug("Allocating vmx_data\n"); - data = (struct vmx_data*)V3_Malloc(sizeof(struct vmx_data)); PrintDebug("Allocating VMCS\n"); - data->vmcs = allocate_vmcs(); + data->vmcs_ptr_phys = allocate_vmcs(); + + PrintDebug("VMCS pointer: %p\n", (void *)(data->vmcs_ptr_phys)); - info->vmm_data = (void*)data; + info->vmm_data = data; PrintDebug("Initializing VMCS (addr=%p)\n", info->vmm_data); - init_vmcs_bios(info); - v3_post_config_guest(info, config_ptr); + if (init_vmcs_bios(info) != 0) { + PrintError("Could not initialize VMCS BIOS\n"); + return -1; + } + + //v3_post_config_guest(info, config_ptr); return 0; } +static int start_vmx_guest(struct guest_info* info) { + uint32_t error = 0; + int ret = 0; + PrintDebug("Attempting VMLAUNCH\n"); -static int start_vmx_guest(struct guest_info *info) { - struct vmx_data* vmx_data = (struct vmx_data*)info->vmm_data; - int vmx_ret; + ret = v3_vmx_vmlaunch(&(info->vm_regs)); + if (ret != VMX_SUCCESS) { + vmcs_read(VMCS_INSTR_ERR, &error, 4); + PrintError("VMLAUNCH failed: %d\n", error); - // Have to do a whole lot of flag setting here - PrintDebug("Clearing VMCS\n"); - vmx_ret = vmcs_clear(vmx_data->vmcs); - if(vmx_ret != VMX_SUCCESS) { - PrintDebug("VMCLEAR failed\n"); - return -1; + v3_print_vmcs_guest_state(); + v3_print_vmcs_host_state(); } - PrintDebug("Loading VMCS\n"); - vmx_ret = vmcs_load(vmx_data->vmcs); - if(vmx_ret != VMX_SUCCESS) { - PrintDebug("VMPTRLD failed\n"); - return -1; - } - + PrintDebug("Returned from VMLAUNCH ret=%d(0x%x)\n", ret, ret); - update_vmcs_host_state(info); - - // Setup guest state return -1; } @@ -656,46 +597,50 @@ static int has_vmx_nested_paging() { -// We set up the global host state that is unlikely to change across processes here -// Segment Descriptors mainly - -struct seg_descriptor { - -}; - - - - void v3_init_vmx(struct v3_ctrl_ops * vm_ops) { extern v3_cpu_arch_t v3_cpu_type; + struct v3_msr tmp_msr; + uint64_t ret=0; + + v3_get_msr(VMX_CR4_FIXED0_MSR,&(tmp_msr.hi),&(tmp_msr.lo)); __asm__ __volatile__ ( - "movq %%cr4, %%rbx; " - "orq $0x00002000,%%rbx; " - "movq %%rbx, %%cr4;" - : - : - : "%rbx" + "movq %%cr4, %%rbx;" + "orq $0x00002000, %%rbx;" + "movq %%rbx, %0;" + : "=m"(ret) + : + : "%rbx" ); - - + if((~ret & tmp_msr.value) == 0) { + __asm__ __volatile__ ( + "movq %0, %%cr4;" + : + : "q"(ret) + ); + } else { + PrintError("Invalid CR4 Settings!\n"); + return; + } + __asm__ __volatile__ ( + "movq %%cr0, %%rbx; " + "orq $0x00000020,%%rbx; " + "movq %%rbx, %%cr0;" + : + : + : "%rbx" + ); + // // Should check and return Error here.... - __asm__ __volatile__ ( - "movq %%cr0, %%rbx; " - "orq $0x00000020,%%rbx; " - "movq %%rbx, %%cr0;" - : - : - : "%rbx" - ); + // Setup VMXON Region - vmxon_ptr = allocate_vmcs(); - PrintDebug("VMXON pointer: 0x%p\n", (void*)vmxon_ptr); + vmxon_ptr_phys = allocate_vmcs(); + PrintDebug("VMXON pointer: 0x%p\n", (void*)vmxon_ptr_phys); - if (v3_enable_vmx(vmxon_ptr) == VMX_SUCCESS) { + if (v3_enable_vmx(vmxon_ptr_phys) == VMX_SUCCESS) { PrintDebug("VMX Enabled\n"); } else { PrintError("VMX initialization failure\n"); @@ -715,3 +660,4 @@ void v3_init_vmx(struct v3_ctrl_ops * vm_ops) { vm_ops->has_nested_paging = &has_vmx_nested_paging; } +