X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmx.c;h=2526f3dea8a5abd226d41a6b0111d2f77c25cff8;hp=df610fa759752916e894e2329f3f2a9414a4c9b4;hb=4bdba551de0969275a9b3ea6db8d99c6c25548a3;hpb=0ab69a6bdddef0ae09d8beb82b9c6c051e1a564d diff --git a/palacios/src/palacios/vmx.c b/palacios/src/palacios/vmx.c index df610fa..2526f3d 100644 --- a/palacios/src/palacios/vmx.c +++ b/palacios/src/palacios/vmx.c @@ -21,621 +21,746 @@ #include -#include #include +#include +#include #include #include -#include #include +#include +#include +#include +#include +#include +static addr_t host_vmcs_ptrs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0}; -// -// -// CRUFT -// -// - -#if 0 -#include -#include -#include +extern int v3_vmx_launch(struct v3_gprs * vm_regs, struct guest_info * info, struct v3_ctrl_regs * ctrl_regs); +extern int v3_vmx_resume(struct v3_gprs * vm_regs, struct guest_info * info, struct v3_ctrl_regs * ctrl_regs); +static int inline check_vmcs_write(vmcs_field_t field, addr_t val) { + int ret = 0; -extern int Launch_VM(ullong_t vmcsPtr, uint_t eip); + ret = vmcs_write(field,val); -#define NUMPORTS 65536 + if (ret != VMX_SUCCESS) { + PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret); + return 1; + } + return 0; +} -#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 int inline check_vmcs_read(vmcs_field_t field, void * val) { + int ret = 0; + ret = vmcs_read(field, val); + if (ret != VMX_SUCCESS) { + PrintError("VMREAD error on %s!: %d\n", v3_vmcs_field_to_str(field), ret); + } -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; - } + return ret; } +#if 0 +// 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, mask_msr.hi, mask_msr.lo); -#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 + val |= mask_msr.lo; + val |= mask_msr.hi; + + return val; +} -uint_t oldesp = 0; -uint_t myregs = 0; +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; -extern uint_t VMCS_LAUNCH(); -extern uint_t Init_VMCS_HostState(); -extern uint_t Init_VMCS_GuestState(); + PrintDebug("MSR %x = %p, %x = %p \n", msr_num0, (void*)msr0_val, msr_num1, (void*)msr1_val); + val |= msr0_val; + val |= msr1_val; + return val; +} -extern int Get_CR2(); -extern int vmRunning; +#endif +static addr_t allocate_vmcs() { + reg_ex_t msr; + struct vmcs_data * vmcs_page = NULL; + PrintDebug("Allocating page\n"); -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; + vmcs_page = (struct vmcs_data *)V3_VAddr(V3_AllocPages(1)); + memset(vmcs_page, 0, 4096); + v3_get_msr(VMX_BASIC_MSR, &(msr.e_reg.high), &(msr.e_reg.low)); + + vmcs_page->revision = ((struct vmx_basic_msr*)&msr)->revision; + PrintDebug("VMX Revision: 0x%x\n",vmcs_page->revision); - - 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; - } + return (addr_t)V3_PAddr((void *)vmcs_page); } -static void ConfigureExits(struct VM *vm) -{ - 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)); +static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state) { + int vmx_ret = 0; -/* VMCS_READ(VM_EXIT_CTRLS, &flags); */ -/* flags |= ACK_IRQ_ON_EXIT; */ -/* VMCS_WRITE(VM_EXIT_CTRLS, &flags); */ -} + PrintDebug("Loading VMCS\n"); + vmx_ret = vmcs_load(vmx_state->vmcs_ptr_phys); + if (vmx_ret != VMX_SUCCESS) { + PrintError("VMPTRLD failed\n"); + return -1; + } -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); + /******* Setup Host State **********/ - exit_eip = (uint_t)RunVMM; + /* Cache GDTR, IDTR, and TR in host struct */ + addr_t gdtr_base; + struct { + uint16_t selector; + addr_t base; + } __attribute__((packed)) tmp_seg; + - PrintTrace("Clear\n"); - VMCS_CLEAR(vmcs); - PrintTrace("Load\n"); - VMCS_LOAD(vmcs); + __asm__ __volatile__( + "sgdt (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + gdtr_base = tmp_seg.base; + vmx_state->host_state.gdtr.base = gdtr_base; + + __asm__ __volatile__( + "sidt (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + vmx_state->host_state.idtr.base = tmp_seg.base; + + __asm__ __volatile__( + "str (%0);" + : + : "q"(&tmp_seg) + : "memory" + ); + vmx_state->host_state.tr.selector = tmp_seg.selector; + + /* The GDTR *index* is bits 3-15 of the selector. */ + struct tss_descriptor * desc = NULL; + 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_state->host_state.tr.base = tmp_seg.base; - 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"); - } - return ret; - } + /********** Setup and VMX Control Fields from MSR ***********/ + /* Setup IO map */ + v3_init_vmx_io_map(info); + v3_init_vmx_msr_map(info); - // PrintTrace("HOST_RIP: %x (%u)\n", exit_eip, exit_eip); - VMCS_WRITE(HOST_RIP, &exit_eip); + struct v3_msr tmp_msr; - /* Guest state */ - PrintTrace("Setting up guest state\n"); - PrintTrace("GUEST_RIP: %x (%u)\n", entry_eip, entry_eip); - VMCS_WRITE(GUEST_RIP, &entry_eip); + v3_get_msr(VMX_PINBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - 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(); + /* Add external interrupts, NMI exiting, and virtual NMI */ + vmx_state->pin_ctrls.value = tmp_msr.lo; + vmx_state->pin_ctrls.nmi_exit = 1; + vmx_state->pin_ctrls.ext_int_exit = 1; - PrintTrace("InitGuestState returned\n"); + v3_get_msr(VMX_PROCBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - 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); + vmx_state->pri_proc_ctrls.value = tmp_msr.lo; + vmx_state->pri_proc_ctrls.use_io_bitmap = 1; + vmx_state->pri_proc_ctrls.hlt_exit = 1; + vmx_state->pri_proc_ctrls.invlpg_exit = 1; + vmx_state->pri_proc_ctrls.use_msr_bitmap = 1; + vmx_state->pri_proc_ctrls.pause_exit = 1; - // tmpReg = 0x4100; - tmpReg = 0xffffffff; - if (VMCS_WRITE(EXCEPTION_BITMAP, &tmpReg) != VMX_SUCCESS) { - PrintInfo("Bitmap error\n"); - } + vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_A_ADDR, (addr_t)V3_PAddr(info->io_map.arch_data)); + vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_B_ADDR, + (addr_t)V3_PAddr(info->io_map.arch_data) + PAGE_SIZE_4KB); - ConfigureExits(vm); + vmx_ret |= check_vmcs_write(VMCS_MSR_BITMAP, (addr_t)V3_PAddr(info->msr_map.arch_data)); - PrintTrace("VMCS_LAUNCH\n"); + v3_get_msr(VMX_EXIT_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + vmx_state->exit_ctrls.value = tmp_msr.lo; + vmx_state->exit_ctrls.host_64_on = 1; - vm->state=VM_VMXASSIST_STARTUP; + if ((vmx_state->exit_ctrls.save_efer == 1) || (vmx_state->exit_ctrls.ld_efer == 1)) { + vmx_state->ia32e_avail = 1; + } - vmm_ret = SAFE_VM_LAUNCH(); + v3_get_msr(VMX_ENTRY_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + vmx_state->entry_ctrls.value = tmp_msr.lo; - PrintTrace("VMM error %d\n", vmm_ret); + { + struct vmx_exception_bitmap excp_bmap; + excp_bmap.value = 0; + + excp_bmap.pf = 1; + + vmx_ret |= check_vmcs_write(VMCS_EXCP_BITMAP, excp_bmap.value); + } + /******* Setup VMXAssist guest state ***********/ - return vmm_ret; -} + info->rip = 0xd0000; + info->vm_regs.rsp = 0x80000; + struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags); + flags->rsvd1 = 1; + /* Print Control MSRs */ + v3_get_msr(VMX_CR0_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + PrintDebug("CR0 MSR: %p\n", (void *)(addr_t)tmp_msr.value); - -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; -} + v3_get_msr(VMX_CR4_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + PrintDebug("CR4 MSR: %p\n", (void *)(addr_t)tmp_msr.value); +#define GUEST_CR0 0x80000031 +#define GUEST_CR4 0x00002000 + info->ctrl_regs.cr0 = GUEST_CR0; + info->ctrl_regs.cr4 = GUEST_CR4; + ((struct cr0_32 *)&(info->shdw_pg_state.guest_cr0))->pe = 1; + + /* Setup paging */ + if (info->shdw_pg_mode == SHADOW_PAGING) { + PrintDebug("Creating initial shadow page table\n"); -// -// -// END CRUFT -// -// + if (v3_init_passthrough_pts(info) == -1) { + PrintError("Could not initialize passthrough page tables\n"); + return -1; + } + +#define CR0_PE 0x00000001 +#define CR0_PG 0x80000000 -#endif -static int update_vmcs_host_state(struct guest_info * info) { - addr_t tmp; + vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG) ); + vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE); - struct { - uint16_t limit; - addr_t base; - } __attribute__((packed)) tmp_seg; + info->ctrl_regs.cr3 = info->direct_map_pt; + // vmx_state->pinbased_ctrls |= NMI_EXIT; - struct v3_msr tmp_msr; + /* Add CR exits */ + vmx_state->pri_proc_ctrls.cr3_ld_exit = 1; + vmx_state->pri_proc_ctrls.cr3_str_exit = 1; + } - __asm__ __volatile__ ( "movq %%cr0, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_CR0, tmp); + // Setup segment registers + { + struct v3_segment * seg_reg = (struct v3_segment *)&(info->segments); + int i; - __asm__ __volatile__ ( "movq %%cr3, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_CR3, tmp); + for (i = 0; i < 10; i++) { + seg_reg[i].selector = 3 << 3; + seg_reg[i].limit = 0xffff; + seg_reg[i].base = 0x0; + } + info->segments.cs.selector = 2<<3; - __asm__ __volatile__ ( "movq %%cr4, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_CR4, tmp); + /* Set only the segment registers */ + for (i = 0; i < 6; i++) { + seg_reg[i].limit = 0xfffff; + seg_reg[i].granularity = 1; + seg_reg[i].type = 3; + seg_reg[i].system = 1; + seg_reg[i].dpl = 0; + seg_reg[i].present = 1; + seg_reg[i].db = 1; + } + info->segments.cs.type = 0xb; + info->segments.ldtr.selector = 0x20; + info->segments.ldtr.type = 2; + info->segments.ldtr.system = 0; + info->segments.ldtr.present = 1; + info->segments.ldtr.granularity = 0; + + /************* Map in GDT and vmxassist *************/ + + uint64_t gdt[] __attribute__ ((aligned(32))) = { + 0x0000000000000000ULL, /* 0x00: reserved */ + 0x0000830000000000ULL, /* 0x08: 32-bit TSS */ + //0x0000890000000000ULL, /* 0x08: 32-bit TSS */ + 0x00CF9b000000FFFFULL, /* 0x10: CS 32-bit */ + 0x00CF93000000FFFFULL, /* 0x18: DS 32-bit */ + 0x000082000000FFFFULL, /* 0x20: LDTR 32-bit */ + }; + +#define VMXASSIST_GDT 0x10000 + addr_t vmxassist_gdt = 0; + + if (guest_pa_to_host_va(info, VMXASSIST_GDT, &vmxassist_gdt) == -1) { + PrintError("Could not find VMXASSIST GDT destination\n"); + return -1; + } + + memcpy((void *)vmxassist_gdt, gdt, sizeof(uint64_t) * 5); + + info->segments.gdtr.base = VMXASSIST_GDT; + +#define VMXASSIST_TSS 0x40000 + uint64_t vmxassist_tss = VMXASSIST_TSS; + gdt[0x08 / sizeof(gdt[0])] |= + ((vmxassist_tss & 0xFF000000) << (56 - 24)) | + ((vmxassist_tss & 0x00FF0000) << (32 - 16)) | + ((vmxassist_tss & 0x0000FFFF) << (16)) | + (8392 - 1); + + info->segments.tr.selector = 0x08; + info->segments.tr.base = vmxassist_tss; + + //info->segments.tr.type = 0x9; + info->segments.tr.type = 0x3; + info->segments.tr.system = 0; + info->segments.tr.present = 1; + info->segments.tr.granularity = 0; + } + + // setup VMXASSIST + { +#define VMXASSIST_START 0x000d0000 + extern uint8_t v3_vmxassist_start[]; + extern uint8_t v3_vmxassist_end[]; + addr_t vmxassist_dst = 0; - __asm__ __volatile__ ("sgdt (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_GDTR_BASE, tmp_seg.base); + if (guest_pa_to_host_va(info, VMXASSIST_START, &vmxassist_dst) == -1) { + PrintError("Could not find VMXASSIST destination\n"); + return -1; + } + memcpy((void *)vmxassist_dst, v3_vmxassist_start, v3_vmxassist_end - v3_vmxassist_start); + } - __asm__ __volatile__ ("sidt (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_IDTR_BASE, tmp_seg.base); + /*** Write all the info to the VMCS ***/ - /* How do we handle this...? - __asm__ __volatile__ ("str (%0); " - : - :"q"(&tmp_seg) - : "memory" - ); - vmcs_write(VMCS_HOST_TR_BASE, tmp_seg.base); - */ +#define DEBUGCTL_MSR 0x1d9 + v3_get_msr(DEBUGCTL_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); + vmx_ret |= check_vmcs_write(VMCS_GUEST_DBG_CTL, tmp_msr.value); -#define FS_BASE_MSR 0xc0000100 -#define GS_BASE_MSR 0xc0000101 + info->dbg_regs.dr7 = 0x400; - // 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_LINK_PTR, (addr_t)0xffffffffffffffffULL); + - // GS.BASE MSR - v3_get_msr(GS_BASE_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_GS_BASE, tmp_msr.value); + if (v3_update_vmcs_ctrl_fields(info)) { + PrintError("Could not write control fields!\n"); + return -1; + } + + if (v3_update_vmcs_host_state(info)) { + PrintError("Could not write host state\n"); + return -1; + } + vmx_state->state = VMXASSIST_DISABLED; - __asm__ __volatile__ ( "movq %%cs, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_CS_SELECTOR, tmp); + return 0; +} - __asm__ __volatile__ ( "movq %%ss, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_SS_SELECTOR, tmp); +int v3_init_vmx_vmcs(struct guest_info * info, v3_vm_class_t vm_class) { + struct vmx_data * vmx_state = NULL; + int vmx_ret = 0; + + vmx_state = (struct vmx_data *)V3_Malloc(sizeof(struct vmx_data)); - __asm__ __volatile__ ( "movq %%ds, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_DS_SELECTOR, tmp); + PrintDebug("vmx_data pointer: %p\n", (void *)vmx_state); - __asm__ __volatile__ ( "movq %%es, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_ES_SELECTOR, tmp); + PrintDebug("Allocating VMCS\n"); + vmx_state->vmcs_ptr_phys = allocate_vmcs(); - __asm__ __volatile__ ( "movq %%fs, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_FS_SELECTOR, tmp); + PrintDebug("VMCS pointer: %p\n", (void *)(vmx_state->vmcs_ptr_phys)); - __asm__ __volatile__ ( "movq %%gs, %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_GS_SELECTOR, tmp); + info->vmm_data = vmx_state; - __asm__ __volatile__ ( "str %0; " - : "=q"(tmp) - : - ); - vmcs_write(VMCS_HOST_TR_SELECTOR, tmp); + PrintDebug("Initializing VMCS (addr=%p)\n", info->vmm_data); + + // TODO: Fix vmcs fields so they're 32-bit + PrintDebug("Clearing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys); + vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys); -#define SYSENTER_CS_MSR 0x00000174 -#define SYSENTER_ESP_MSR 0x00000175 -#define SYSENTER_EIP_MSR 0x00000176 + if (vmx_ret != VMX_SUCCESS) { + PrintError("VMCLEAR failed\n"); + return -1; + } - // SYSENTER CS MSR - v3_get_msr(SYSENTER_CS_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_CS, tmp_msr.value); + if (vm_class == V3_PC_VM) { + PrintDebug("Initializing VMCS\n"); + init_vmcs_bios(info, vmx_state); + } else { + PrintError("Invalid VM Class\n"); + return -1; + } - // SYSENTER_ESP MSR - v3_get_msr(SYSENTER_ESP_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_ESP, tmp_msr.value); + return 0; +} - // SYSENTER_EIP MSR - v3_get_msr(SYSENTER_EIP_MSR, &(tmp_msr.hi), &(tmp_msr.lo)); - vmcs_write(VMCS_HOST_SYSENTER_EIP, tmp_msr.value); +static int update_irq_exit_state(struct guest_info * info) { + struct vmx_exit_idt_vec_info idt_vec_info; + check_vmcs_read(VMCS_IDT_VECTOR_INFO, &(idt_vec_info.value)); - // RIP - // RSP + if ((info->intr_state.irq_started == 1) && (idt_vec_info.valid == 0)) { +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Calling v3_injecting_intr\n"); +#endif + info->intr_state.irq_started = 0; + v3_injecting_intr(info, info->intr_state.irq_vector, V3_EXTERNAL_IRQ); + } return 0; } +static int update_irq_entry_state(struct guest_info * info) { + struct vmx_exit_idt_vec_info idt_vec_info; + struct vmcs_interrupt_state intr_state; + struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data); + check_vmcs_read(VMCS_IDT_VECTOR_INFO, &(idt_vec_info.value)); + check_vmcs_read(VMCS_GUEST_INT_STATE, &(intr_state)); + /* Check for pending exceptions to inject */ + if (v3_excp_pending(info)) { + struct vmx_entry_int_info int_info; + int_info.value = 0; + // In VMX, almost every exception is hardware + // Software exceptions are pretty much only for breakpoint or overflow + int_info.type = 3; + int_info.vector = v3_get_excp_number(info); -static struct vmcs_data* vmxon_ptr; + if (info->excp_state.excp_error_code_valid) { + check_vmcs_write(VMCS_ENTRY_EXCP_ERR, info->excp_state.excp_error_code); + int_info.error_code = 1; +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Injecting exception %d with error code %x\n", + int_info.vector, info->excp_state.excp_error_code); +#endif + } -#if 0 -// 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; + int_info.valid = 1; +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Injecting exception %d (EIP=%p)\n", int_info.vector, (void *)info->rip); +#endif + check_vmcs_write(VMCS_ENTRY_INT_INFO, int_info.value); - PrintDebug("sanitize_bits1 (MSR:%x)\n", msr_num); + v3_injecting_excp(info, int_info.vector); - v3_get_msr(msr_num, &mask_msr.hi, &mask_msr.lo); + } else if ((((struct rflags *)&(info->ctrl_regs.rflags))->intr == 1) && + (intr_state.val == 0)) { + + if ((info->intr_state.irq_started == 1) && (idt_vec_info.valid == 1)) { - PrintDebug("MSR %x = %x : %x \n", msr_num, mask_msr.hi, mask_msr.lo); +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("IRQ pending from previous injection\n"); +#endif - val &= mask_msr.lo; - val &= mask_msr.hi; - - return val; -} + // Copy the IDT vectoring info over to reinject the old interrupt + if (idt_vec_info.error_code == 1) { + uint32_t err_code = 0; + + check_vmcs_read(VMCS_IDT_VECTOR_ERR, &err_code); + check_vmcs_write(VMCS_ENTRY_EXCP_ERR, err_code); + } + + idt_vec_info.undef = 0; + check_vmcs_write(VMCS_ENTRY_INT_INFO, idt_vec_info.value); + + } else { + struct vmx_entry_int_info ent_int; + ent_int.value = 0; + + switch (v3_intr_pending(info)) { + case V3_EXTERNAL_IRQ: { + info->intr_state.irq_vector = v3_get_intr(info); + ent_int.vector = info->intr_state.irq_vector; + ent_int.type = 0; + ent_int.error_code = 0; + ent_int.valid = 1; + +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Injecting Interrupt %d at exit %u(EIP=%p)\n", + info->intr_state.irq_vector, + (uint32_t)info->num_exits, + (void *)info->rip); +#endif + check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value); + info->intr_state.irq_started = 1; + + break; + } + case V3_NMI: + PrintDebug("Injecting NMI\n"); + + ent_int.type = 2; + ent_int.vector = 2; + ent_int.valid = 1; + check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value); + + break; + case V3_SOFTWARE_INTR: + PrintDebug("Injecting software interrupt\n"); + ent_int.type = 4; + + ent_int.valid = 1; + check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value); + + break; + case V3_VIRTUAL_IRQ: + // Not sure what to do here, Intel doesn't have virtual IRQs + // May be the same as external interrupts/IRQs + + break; + case V3_INVALID_INTR: + default: + break; + } + } + } else if ((v3_intr_pending(info)) && (vmx_info->pri_proc_ctrls.int_wndw_exit == 0)) { + // Enable INTR window exiting so we know when IF=1 + uint32_t instr_len; + check_vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len); -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; +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Enabling Interrupt-Window exiting: %d\n", instr_len); +#endif - PrintDebug("sanitize_bits2 (MSR0=%x, MSR1=%x)\n", msr_num0, msr_num1); + vmx_info->pri_proc_ctrls.int_wndw_exit = 1; + check_vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value); + } - 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, (void*)msr0_val, msr_num1, (void*)msr1_val); + return 0; +} - val &= msr0_val; - val &= msr1_val; - return val; -} -static int setup_base_host_state() { +static struct vmx_exit_info exit_log[10]; + +static void print_exit_log(struct guest_info * info) { + int cnt = info->num_exits % 10; + int i = 0; + V3_Print("\nExit Log (%d total exits):\n", (uint32_t)info->num_exits); - // vmwrite(HOST_IDTR_BASE, + for (i = 0; i < 10; i++) { + struct vmx_exit_info * tmp = &exit_log[cnt]; + V3_Print("%d:\texit_reason = %p\n", i, (void *)(addr_t)tmp->exit_reason); + V3_Print("\texit_qual = %p\n", (void *)tmp->exit_qual); + V3_Print("\tint_info = %p\n", (void *)(addr_t)tmp->int_info); + V3_Print("\tint_err = %p\n", (void *)(addr_t)tmp->int_err); + V3_Print("\tinstr_info = %p\n", (void *)(addr_t)tmp->instr_info); -} + cnt--; + if (cnt == -1) { + cnt = 9; + } + } -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->segments.cs.selector = 0xf000; - 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; - vm_info->segments.cs.dpl = 3; - 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; } -#endif +/* + * CAUTION and DANGER!!! + * + * The VMCS CANNOT(!!) be accessed outside of the cli/sti calls inside this function + * When exectuing a symbiotic call, the VMCS WILL be overwritten, so any dependencies + * on its contents will cause things to break. The contents at the time of the exit WILL + * change before the exit handler is executed. + */ +int v3_vmx_enter(struct guest_info * info) { + int ret = 0; + uint64_t tmp_tsc = 0; + struct vmx_exit_info exit_info; -static struct vmcs_data* allocate_vmcs() -{ - reg_ex_t msr; - PrintDebug("Allocating page\n"); - struct vmcs_data* vmcs_page = (struct vmcs_data*)V3_VAddr(V3_AllocPages(1)); + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); - memset(vmcs_page, 0, 4096); - v3_get_msr(VMX_BASIC_MSR, &(msr.e_reg.high), &(msr.e_reg.low)); - - vmcs_page->revision = ((struct vmx_basic_msr*)&msr)->revision; - PrintDebug("VMX Revision: 0x%x\n",vmcs_page->revision); + // v3_print_guest_state(info); - return (struct vmcs_data*)V3_PAddr((void*)vmcs_page); -} + // disable global interrupts for vm state transition + v3_disable_ints(); + v3_vmx_restore_vmcs(info); -static void init_vmcs_bios(struct guest_info * vm_info) -{ +#ifdef CONFIG_SYMBIOTIC + if (info->sym_state.sym_call_active == 0) { + update_irq_entry_state(info); + } +#else + update_irq_entry_state(info); +#endif -} + rdtscll(info->time_state.cached_host_tsc); + if (info->run_state == VM_STOPPED) { + info->run_state = VM_RUNNING; + ret = v3_vmx_launch(&(info->vm_regs), info, &(info->ctrl_regs)); + } else { + ret = v3_vmx_resume(&(info->vm_regs), info, &(info->ctrl_regs)); + } + // PrintDebug("VMX Exit: ret=%d\n", ret); -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); + if (ret != VMX_SUCCESS) { + uint32_t error = 0; - struct vmx_data* data; + vmcs_read(VMCS_INSTR_ERR, &error); + PrintError("VMENTRY Error: %d\n", error); - PrintDebug("Allocating vmx_data\n"); - data = (struct vmx_data*)V3_Malloc(sizeof(struct vmx_data)); - PrintDebug("Allocating VMCS\n"); - data->vmcs = allocate_vmcs(); + return -1; + } - info->vmm_data = (void*)data; + rdtscll(tmp_tsc); - PrintDebug("Initializing VMCS (addr=%p)\n", info->vmm_data); - init_vmcs_bios(info); + info->num_exits++; - v3_post_config_guest(info, config_ptr); + v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc); - return 0; -} + /* Update guest state */ + v3_vmx_save_vmcs(info); + info->mem_mode = v3_get_vm_mem_mode(info); + info->cpu_mode = v3_get_vm_cpu_mode(info); + check_vmcs_read(VMCS_EXIT_INSTR_LEN, &(exit_info.instr_len)); + check_vmcs_read(VMCS_EXIT_INSTR_INFO, &(exit_info.instr_info)); + check_vmcs_read(VMCS_EXIT_REASON, &(exit_info.exit_reason)); + check_vmcs_read(VMCS_EXIT_QUAL, &(exit_info.exit_qual)); + check_vmcs_read(VMCS_EXIT_INT_INFO, &(exit_info.int_info)); + check_vmcs_read(VMCS_EXIT_INT_ERR, &(exit_info.int_err)); + check_vmcs_read(VMCS_GUEST_LINEAR_ADDR, &(exit_info.guest_linear_addr)); -static int start_vmx_guest(struct guest_info *info) { - struct vmx_data* vmx_data = (struct vmx_data*)info->vmm_data; - int vmx_ret; + //PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_info.exit_reason, exit_info.exit_qual); - // 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; - } - PrintDebug("Loading VMCS\n"); - vmx_ret = vmcs_load(vmx_data->vmcs); - if(vmx_ret != VMX_SUCCESS) { - PrintDebug("VMPTRLD failed\n"); - return -1; + exit_log[info->num_exits % 10] = exit_info; + + +#ifdef CONFIG_SYMBIOTIC + if (info->sym_state.sym_call_active == 0) { + update_irq_exit_state(info); } +#else + update_irq_exit_state(info); +#endif + // reenable global interrupts after vm exit + v3_enable_ints(); - update_vmcs_host_state(info); + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); - // Setup guest state - return -1; + if (v3_handle_vmx_exit(info, &exit_info) == -1) { + PrintError("Error in VMX exit handler\n"); + return -1; + } + + return 0; } +int v3_start_vmx_guest(struct guest_info* info) { + + + PrintDebug("Launching VMX guest\n"); + + rdtscll(info->time_state.cached_host_tsc); + while (1) { + if (v3_vmx_enter(info) == -1) { + v3_print_vmcs(); + print_exit_log(info); + return -1; + } + +/* + if ((info->num_exits % 5000) == 0) { + V3_Print("VMX Exit number %d\n", (uint32_t)info->num_exits); + } +*/ + + } + + return 0; +} int v3_is_vmx_capable() { v3_msr_t feature_msr; - addr_t eax = 0, ebx = 0, ecx = 0, edx = 0; + uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0; v3_cpuid(0x1, &eax, &ebx, &ecx, &edx); - PrintDebug("ECX: %p\n", (void*)ecx); + PrintDebug("ECX: 0x%x\n", ecx); if (ecx & CPUID_1_ECX_VTXFLAG) { v3_get_msr(VMX_FEATURE_CONTROL_MSR, &(feature_msr.hi), &(feature_msr.lo)); - PrintTrace("MSRREGlow: 0x%.8x\n", feature_msr.lo); + PrintDebug("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"); @@ -656,62 +781,63 @@ 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; +void v3_init_vmx_cpu(int cpu_id) { + extern v3_cpu_arch_t v3_cpu_types[]; + 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; + } - - // Should check and return Error here.... __asm__ __volatile__ ( "movq %%cr0, %%rbx; " "orq $0x00000020,%%rbx; " "movq %%rbx, %%cr0;" - : - : - : "%rbx" + : + : + : "%rbx" ); + // + // Should check and return Error here.... + // Setup VMXON Region - vmxon_ptr = allocate_vmcs(); - PrintDebug("VMXON pointer: 0x%p\n", (void*)vmxon_ptr); + host_vmcs_ptrs[cpu_id] = allocate_vmcs(); + + PrintDebug("VMXON pointer: 0x%p\n", (void *)host_vmcs_ptrs[cpu_id]); - if (v3_enable_vmx(vmxon_ptr) == VMX_SUCCESS) { + if (v3_enable_vmx(host_vmcs_ptrs[cpu_id]) == VMX_SUCCESS) { PrintDebug("VMX Enabled\n"); } else { PrintError("VMX initialization failure\n"); return; } - + if (has_vmx_nested_paging() == 1) { - v3_cpu_type = V3_VMX_EPT_CPU; + v3_cpu_types[cpu_id] = V3_VMX_EPT_CPU; } else { - v3_cpu_type = V3_VMX_CPU; + v3_cpu_types[cpu_id] = V3_VMX_CPU; } - // Setup the VMX specific vmm operations - vm_ops->init_guest = &init_vmx_guest; - vm_ops->start_guest = &start_vmx_guest; - vm_ops->has_nested_paging = &has_vmx_nested_paging; - } +