#include <palacios/vmm_config.h>
#include <palacios/vmm_ctrl_regs.h>
#include <palacios/vm_guest_mem.h>
+#include <palacios/vmm_direct_paging.h>
+#include <palacios/vmx_io.h>
+#include <palacios/vmx_msr.h>
static addr_t vmxon_ptr_phys;
extern int v3_vmx_exit_handler();
-extern int v3_vmx_vmlaunch(struct v3_gprs * vm_regs);
+extern int v3_vmx_vmlaunch(struct v3_gprs * vm_regs, struct guest_info * info);
static int inline check_vmcs_write(vmcs_field_t field, addr_t val)
{
access->granularity = v3_seg->granularity;
}
+static int update_vmcs_ctrl_fields(struct guest_info * info) {
+ int vmx_ret = 0;
+ struct vmx_data * arch_data = (struct vmx_data *)(info->vmm_data);
+
+ vmx_ret |= check_vmcs_write(VMCS_PIN_CTRLS, arch_data->pinbased_ctrls);
+ vmx_ret |= check_vmcs_write(VMCS_PROC_CTRLS, arch_data->pri_procbased_ctrls);
+
+ if(arch_data->pri_procbased_ctrls & ACTIVE_SEC_CTRLS) {
+ vmx_ret |= check_vmcs_write(VMCS_SEC_PROC_CTRLS, arch_data->sec_procbased_ctrls);
+ }
+
+ vmx_ret |= check_vmcs_write(VMCS_EXIT_CTRLS, arch_data->exit_ctrls);
+ vmx_ret |= check_vmcs_write(VMCS_ENTRY_CTRLS, arch_data->entry_ctrls);
+ vmx_ret |= check_vmcs_write(VMCS_EXCP_BITMAP, arch_data->excp_bitmap);
+
+ return vmx_ret;
+}
static int update_vmcs_host_state(struct guest_info * info) {
int vmx_ret = 0;
vmx_ret |= check_vmcs_write(VMCS_GUEST_CR0, info->ctrl_regs.cr0);
+ vmx_ret |= check_vmcs_write(VMCS_GUEST_CR3, info->ctrl_regs.cr3);
vmx_ret |= check_vmcs_write(VMCS_GUEST_CR4, info->ctrl_regs.cr4);
vmx_ret |= check_vmcs_write(VMCS_GUEST_RFLAGS, info->ctrl_regs.rflags);
vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, 0xffffffffffffffff);
+
/*** Write VMCS Segments ***/
struct vmcs_segment_access access;
return val;
}
-static int setup_base_host_state() {
-
-
-
- // vmwrite(HOST_IDTR_BASE,
-
-
-}
#endif
- /********** Setup and write VMX Control Fields ***********/
- struct v3_msr tmp_msr;
-
- 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);
-
-
-
-
/******* Setup Host State **********/
/* Cache GDTR, IDTR, and TR in host struct */
vmx_data->host_state.tr.base = tmp_seg.base;
- if(update_vmcs_host_state(info)) {
- PrintError("Could not write host state\n");
- return -1;
- }
+
+
+ /********** Setup and VMX Control Fields from MSR ***********/
+ struct v3_msr tmp_msr;
+
+ v3_get_msr(VMX_PINBASED_CTLS_MSR,&(tmp_msr.hi),&(tmp_msr.lo));
+ /* Add NMI exiting */
+ vmx_data->pinbased_ctrls = tmp_msr.lo | NMI_EXIT;
+
+ v3_get_msr(VMX_PROCBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ vmx_data->pri_procbased_ctrls = tmp_msr.lo;
+
+ v3_get_msr(VMX_EXIT_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ vmx_data->exit_ctrls = tmp_msr.lo | HOST_ADDR_SPACE_SIZE;
+
+ v3_get_msr(VMX_ENTRY_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ vmx_data->entry_ctrls = tmp_msr.lo;
+
+ vmx_data->excp_bitmap = 0xffffffff;
/******* Setup VMXAssist guest state ***********/
+
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*)tmp_msr.value);
+ v3_get_msr(VMX_CR4_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ PrintDebug("CR4 MSR: %p\n", (void*)tmp_msr.value);
+
+
#define GUEST_CR0 0x80000031
#define GUEST_CR4 0x00002000
info->ctrl_regs.cr0 = GUEST_CR0;
info->ctrl_regs.cr4 = GUEST_CR4;
- addr_t guest_cr3 = (addr_t)V3_AllocPages(1);
+ /* Setup paging */
+ if(info->shdw_pg_mode == SHADOW_PAGING) {
+ PrintDebug("Creating initial shadow page table\n");
- memset(V3_VAddr((void*)guest_cr3), 0, 4096);
- vmcs_write(VMCS_GUEST_CR3, guest_cr3);
+ if(v3_init_passthrough_pts(info) == -1) {
+ PrintError("Could not initialize passthrough page tables\n");
+ return -1;
+ }
- v3_get_msr(VMX_CR0_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- PrintDebug("CR0 MSR: %p\n", (void*)tmp_msr.value);
+ info->shdw_pg_state.guest_cr0 = 0x10LL;
+ PrintDebug("Created\n");
- v3_get_msr(VMX_CR4_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- PrintDebug("CR4 MSR: %p\n", (void*)tmp_msr.value);
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, 0xffffffffffffffffLL);
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, 0xffffffffffffffffLL);
+
+ info->ctrl_regs.cr3 = info->direct_map_pt;
+
+ /* Add unconditional I/O and CR exits */
+ vmx_data->pri_procbased_ctrls |= UNCOND_IO_EXIT |
+ CR3_LOAD_EXIT |
+ CR3_STORE_EXIT;
+
+ }
struct v3_segment * seg_reg = (struct v3_segment *)&(info->segments);
info->segments.ldtr.present = 1;
info->segments.ldtr.granularity = 0;
+ /* Setup IO map */
+ (void) v3_init_vmx_io_map(info);
+ (void) v3_init_vmx_msr_map(info);
+ /************* 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 */
+ };
-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) {
return -1;
}
memcpy((void*)vmxassist_dst, vmxassist_start, vmxassist_end-vmxassist_start);
+
+ /*** Write all the info to the VMCS ***/
+ if(update_vmcs_ctrl_fields(info)) {
+ PrintError("Could not write control fields!\n");
+ return -1;
+ }
+
+ if(update_vmcs_host_state(info)) {
+ PrintError("Could not write host state\n");
+ return -1;
+ }
+
if(update_vmcs_guest_state(info) != VMX_SUCCESS) {
- PrintDebug("Writing guest state failed!\n");
+ PrintError("Writing guest state failed!\n");
return -1;
}
v3_print_vmcs();
- //v3_post_config_guest(info, config_ptr);
+ v3_post_config_guest(info, config_ptr);
return 0;
}
PrintDebug("Attempting VMLAUNCH\n");
- ret = v3_vmx_vmlaunch(&(info->vm_regs));
+ ret = v3_vmx_vmlaunch(&(info->vm_regs), info);
if (ret != VMX_SUCCESS) {
vmcs_read(VMCS_INSTR_ERR, &error);
PrintError("VMLAUNCH failed: %d\n", error);
+++ /dev/null
-/*
- * 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, Peter Dinda <pdinda@northwestern.edu>
- * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
- * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
- * All rights reserved.
- *
- * Author: Peter Dinda <pdinda@northwestern.edu>
- * Jack Lange <jarusl@cs.northwestern.edu>
- *
- * This is free software. You are permitted to use,
- * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
- */
-
-
-/* Eventually we want to get rid of these */
-
-#include <geekos/cpu.h>
-#include <geekos/io_devs.h>
-#include <geekos/io.h>
-/* ** */
-
-#include <palacios/vmx.h>
-#include <palacios/vmcs.h>
-#include <palacios/vmm.h>
-#include <palacios/vmm_util.h>
-#include <palacios/vmm_string.h>
-
-
-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
-
-
-#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
-
-
-extern struct vmm_os_hooks * os_hooks;
-
-
-static struct VM theVM;
-
-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;
- }
-}
-
-
-static void VMXPanic()
-{
- while (1) {}
-}
-
-
-#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;
-
-// 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();
-extern uint_t VMCS_STORE();
-extern uint_t VMCS_LAUNCH();
-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;
-
-}
-
-
-
-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 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;
-}
-
-static void SetupV8086ModeForBoot(struct VM *vm)
-{
- vm->state = VM_VMXASSIST_V8086_BIOS;
-
- // Put guest into V8086 mode on return
- vm->vmcs.guestStateArea.rflags |= EFLAGS_VM | EFLAGS_IOPL_HI | EFLAGS_IOPL_LO ;
-
- // We will start at f000:fff0 on return
- //
- // We want this to look as much as possible as a processor
- // 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.access.as_dword = 0xf3;
-
- vm->vmcs.guestStateArea.ss.selector = 0x0000;
- 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.access.as_dword = 0xf3;
-
- vm->vmcs.guestStateArea.es.selector = 0x0000;
- 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.access.as_dword = 0xf3;
-
- vm->vmcs.guestStateArea.gs.selector = 0x0000;
- vm->vmcs.guestStateArea.gs.limit=0xffff;
- vm->vmcs.guestStateArea.gs.access.as_dword = 0xf3;
-
- V8086ModeSegmentRegisterFixup(vm);
-
- PrintTrace_VMCSData(&(vm->vmcs));
-
-}
-
-
-
-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)
-{
- 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));
-
-
-/* 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");
- }
- 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;
-}
-
-
-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;
-
- 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));
-
- return vmcs;
-}
