* 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>
+ * Copyright (c) 2011, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2011, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
- * Author: Peter Dinda <pdinda@northwestern.edu>
- * Jack Lange <jarusl@cs.northwestern.edu>
+ * Author: 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".
#include <palacios/vmx.h>
-#include <palacios/vmcs.h>
#include <palacios/vmm.h>
+#include <palacios/vmx_handler.h>
+#include <palacios/vmcs.h>
#include <palacios/vmx_lowlevel.h>
#include <palacios/vmm_lowlevel.h>
-#include <palacios/vmm_config.h>
#include <palacios/vmm_ctrl_regs.h>
+#include <palacios/vmm_config.h>
+#include <palacios/vmm_time.h>
+#include <palacios/vm_guest_mem.h>
+#include <palacios/vmm_direct_paging.h>
+#include <palacios/vmx_io.h>
+#include <palacios/vmx_msr.h>
+#include <palacios/vmm_decoder.h>
+#include <palacios/vmm_barrier.h>
+
+#ifdef V3_CONFIG_CHECKPOINT
+#include <palacios/vmm_checkpoint.h>
+#endif
+#include <palacios/vmx_ept.h>
+#include <palacios/vmx_assist.h>
+#include <palacios/vmx_hw_info.h>
-//
-//
-// CRUFT
-//
-//
+#ifndef V3_CONFIG_DEBUG_VMX
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
-#if 0
-#include <palacios/vmm_util.h>
-#include <palacios/vmm_string.h>
-#include <palacios/vmm_ctrl_regs.h>
+/* These fields contain the hardware feature sets supported by the local CPU */
+static struct vmx_hw_info hw_info;
+extern v3_cpu_arch_t v3_cpu_types[];
+static addr_t host_vmcs_ptrs[V3_CONFIG_MAX_CPUS] = { [0 ... V3_CONFIG_MAX_CPUS - 1] = 0};
-extern int Launch_VM(ullong_t vmcsPtr, uint_t eip);
+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);
-#define NUMPORTS 65536
+static int inline check_vmcs_write(vmcs_field_t field, addr_t val) {
+ int ret = 0;
+ ret = vmcs_write(field, val);
+
+ 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;
}
-#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
+static addr_t allocate_vmcs() {
+ struct vmcs_data * vmcs_page = NULL;
-uint_t oldesp = 0;
-uint_t myregs = 0;
+ PrintDebug("Allocating page\n");
+ vmcs_page = (struct vmcs_data *)V3_VAddr(V3_AllocPages(1));
+ memset(vmcs_page, 0, 4096);
+ vmcs_page->revision = hw_info.basic_info.revision;
+ PrintDebug("VMX Revision: 0x%x\n", vmcs_page->revision);
+ return (addr_t)V3_PAddr((void *)vmcs_page);
+}
-extern uint_t VMCS_LAUNCH();
-extern uint_t Init_VMCS_HostState();
-extern uint_t Init_VMCS_GuestState();
+static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state) {
+ int vmx_ret = 0;
+ // disable global interrupts for vm state initialization
+ v3_disable_ints();
-extern int Get_CR2();
-extern int vmRunning;
+ PrintDebug("Loading VMCS\n");
+ vmx_ret = vmcs_load(vmx_state->vmcs_ptr_phys);
+ vmx_state->state = VMX_UNLAUNCHED;
+ if (vmx_ret != VMX_SUCCESS) {
+ PrintError("VMPTRLD failed\n");
+ return -1;
+ }
+ /*** Setup default state from HW ***/
+ vmx_state->pin_ctrls.value = hw_info.pin_ctrls.def_val;
+ vmx_state->pri_proc_ctrls.value = hw_info.proc_ctrls.def_val;
+ vmx_state->exit_ctrls.value = hw_info.exit_ctrls.def_val;
+ vmx_state->entry_ctrls.value = hw_info.entry_ctrls.def_val;
+ vmx_state->sec_proc_ctrls.value = hw_info.sec_proc_ctrls.def_val;
-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;
+ /* Print Control MSRs */
+ PrintDebug("CR0 MSR: %p\n", (void *)(addr_t)hw_info.cr0.value);
+ PrintDebug("CR4 MSR: %p\n", (void *)(addr_t)hw_info.cr4.value);
-
- 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;
- }
-}
+ /******* Setup Host State **********/
+ /* Cache GDTR, IDTR, and TR in host struct */
-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));
+ /********** Setup VMX Control Fields ***********/
+ /* Add external interrupts, NMI exiting, and virtual NMI */
+ vmx_state->pin_ctrls.nmi_exit = 1;
+ vmx_state->pin_ctrls.ext_int_exit = 1;
-/* VMCS_READ(VM_EXIT_CTRLS, &flags); */
-/* flags |= ACK_IRQ_ON_EXIT; */
-/* VMCS_WRITE(VM_EXIT_CTRLS, &flags); */
-}
+ vmx_state->pri_proc_ctrls.hlt_exit = 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;
+ vmx_state->pri_proc_ctrls.pause_exit = 0;
+ vmx_state->pri_proc_ctrls.tsc_offset = 1;
+#ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
+ vmx_state->pri_proc_ctrls.rdtsc_exit = 1;
+#endif
- PrintTrace("Guest ESP: 0x%x (%u)\n", guest_esp, guest_esp);
+ /* Setup IO map */
+ vmx_state->pri_proc_ctrls.use_io_bitmap = 1;
+ vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_A_ADDR, (addr_t)V3_PAddr(core->vm_info->io_map.arch_data));
+ vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_B_ADDR,
+ (addr_t)V3_PAddr(core->vm_info->io_map.arch_data) + PAGE_SIZE_4KB);
- exit_eip = (uint_t)RunVMM;
- PrintTrace("Clear\n");
- VMCS_CLEAR(vmcs);
- PrintTrace("Load\n");
- VMCS_LOAD(vmcs);
+ vmx_state->pri_proc_ctrls.use_msr_bitmap = 1;
+ vmx_ret |= check_vmcs_write(VMCS_MSR_BITMAP, (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data));
- 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;
- }
+#ifdef __V3_64BIT__
+ // Ensure host runs in 64-bit mode at each VM EXIT
+ vmx_state->exit_ctrls.host_64_on = 1;
+#endif
- // PrintTrace("HOST_RIP: %x (%u)\n", exit_eip, exit_eip);
- VMCS_WRITE(HOST_RIP, &exit_eip);
+ // Hook all accesses to EFER register
+ v3_hook_msr(core->vm_info, EFER_MSR,
+ &v3_handle_efer_read,
+ &v3_handle_efer_write,
+ core);
- /* Guest state */
- PrintTrace("Setting up guest state\n");
- PrintTrace("GUEST_RIP: %x (%u)\n", entry_eip, entry_eip);
- VMCS_WRITE(GUEST_RIP, &entry_eip);
+ // Restore host's EFER register on each VM EXIT
+ vmx_state->exit_ctrls.ld_efer = 1;
- 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();
+ // Save/restore guest's EFER register to/from VMCS on VM EXIT/ENTRY
+ vmx_state->exit_ctrls.save_efer = 1;
+ vmx_state->entry_ctrls.ld_efer = 1;
- PrintTrace("InitGuestState returned\n");
+ // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE);
- 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");
- }
+ /* Setup paging */
+ if (core->shdw_pg_mode == SHADOW_PAGING) {
+ PrintDebug("Creating initial shadow page table\n");
- ConfigureExits(vm);
+ if (v3_init_passthrough_pts(core) == -1) {
+ PrintError("Could not initialize passthrough page tables\n");
+ return -1;
+ }
+
+#define CR0_PE 0x00000001
+#define CR0_PG 0x80000000
+#define CR0_WP 0x00010000 // To ensure mem hooks work
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP));
- PrintTrace("VMCS_LAUNCH\n");
+ core->ctrl_regs.cr3 = core->direct_map_pt;
- vm->state=VM_VMXASSIST_STARTUP;
+ // vmx_state->pinbased_ctrls |= NMI_EXIT;
- vmm_ret = SAFE_VM_LAUNCH();
+ /* Add CR exits */
+ vmx_state->pri_proc_ctrls.cr3_ld_exit = 1;
+ vmx_state->pri_proc_ctrls.cr3_str_exit = 1;
+
+ vmx_state->pri_proc_ctrls.invlpg_exit = 1;
+
+ /* Add page fault exits */
+ vmx_state->excp_bmap.pf = 1;
- PrintTrace("VMM error %d\n", vmm_ret);
+ // Setup VMX Assist
+ v3_vmxassist_init(core, vmx_state);
- return vmm_ret;
-}
+ } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
+ (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_CPU)) {
+#define CR0_PE 0x00000001
+#define CR0_PG 0x80000000
+#define CR0_WP 0x00010000 // To ensure mem hooks work
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP));
+ // vmx_state->pinbased_ctrls |= NMI_EXIT;
-
-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;
-}
+ /* Disable CR exits */
+ vmx_state->pri_proc_ctrls.cr3_ld_exit = 0;
+ vmx_state->pri_proc_ctrls.cr3_str_exit = 0;
+ vmx_state->pri_proc_ctrls.invlpg_exit = 0;
+ /* Add page fault exits */
+ // vmx_state->excp_bmap.pf = 1; // This should never happen..., enabled to catch bugs
+
+ // Setup VMX Assist
+ v3_vmxassist_init(core, vmx_state);
+ /* Enable EPT */
+ vmx_state->pri_proc_ctrls.sec_ctrls = 1; // Enable secondary proc controls
+ vmx_state->sec_proc_ctrls.enable_ept = 1; // enable EPT paging
-//
-//
-// END CRUFT
-//
-//
-#endif
-static int update_vmcs_host_state(struct guest_info * info) {
- addr_t tmp;
+ if (v3_init_ept(core, &hw_info) == -1) {
+ PrintError("Error initializing EPT\n");
+ return -1;
+ }
- struct {
- uint16_t limit;
- addr_t base;
- } __attribute__((packed)) tmp_seg;
+ } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
+ (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_UG_CPU)) {
+ int i = 0;
+ // For now we will assume that unrestricted guest mode is assured w/ EPT
- struct v3_msr tmp_msr;
+ core->vm_regs.rsp = 0x00;
+ core->rip = 0xfff0;
+ core->vm_regs.rdx = 0x00000f00;
+ core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
+ core->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
- __asm__ __volatile__ ( "movq %%cr0, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_CR0, tmp);
+ core->segments.cs.selector = 0xf000;
+ core->segments.cs.limit = 0xffff;
+ core->segments.cs.base = 0x0000000f0000LL;
- __asm__ __volatile__ ( "movq %%cr3, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_CR3, tmp);
+ // (raw attributes = 0xf3)
+ core->segments.cs.type = 0xb;
+ core->segments.cs.system = 0x1;
+ core->segments.cs.dpl = 0x0;
+ core->segments.cs.present = 1;
- __asm__ __volatile__ ( "movq %%cr4, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_CR4, tmp);
+ struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
+ &(core->segments.es), &(core->segments.fs),
+ &(core->segments.gs), NULL};
+ for ( i = 0; segregs[i] != NULL; i++) {
+ struct v3_segment * seg = segregs[i];
+
+ seg->selector = 0x0000;
+ // seg->base = seg->selector << 4;
+ seg->base = 0x00000000;
+ seg->limit = 0xffff;
- __asm__ __volatile__ ("sgdt (%0); "
- :
- :"q"(&tmp_seg)
- : "memory"
- );
- vmcs_write(VMCS_HOST_GDTR_BASE, tmp_seg.base);
+ seg->type = 0x3;
+ seg->system = 0x1;
+ seg->dpl = 0x0;
+ seg->present = 1;
+ // seg->granularity = 1;
+ }
- __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);
- */
+ core->segments.gdtr.limit = 0x0000ffff;
+ core->segments.gdtr.base = 0x0000000000000000LL;
-#define FS_BASE_MSR 0xc0000100
-#define GS_BASE_MSR 0xc0000101
+ core->segments.idtr.limit = 0x0000ffff;
+ core->segments.idtr.base = 0x0000000000000000LL;
- // FS.BASE MSR
- v3_get_msr(FS_BASE_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- vmcs_write(VMCS_HOST_FS_BASE, tmp_msr.value);
+ core->segments.ldtr.selector = 0x0000;
+ core->segments.ldtr.limit = 0x0000ffff;
+ core->segments.ldtr.base = 0x0000000000000000LL;
+ core->segments.ldtr.type = 2;
+ core->segments.ldtr.present = 1;
- // GS.BASE MSR
- v3_get_msr(GS_BASE_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- vmcs_write(VMCS_HOST_GS_BASE, tmp_msr.value);
+ core->segments.tr.selector = 0x0000;
+ core->segments.tr.limit = 0x0000ffff;
+ core->segments.tr.base = 0x0000000000000000LL;
+ core->segments.tr.type = 0xb;
+ core->segments.tr.present = 1;
+ // core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
+ core->dbg_regs.dr7 = 0x0000000000000400LL;
+ /* Enable EPT */
+ vmx_state->pri_proc_ctrls.sec_ctrls = 1; // Enable secondary proc controls
+ vmx_state->sec_proc_ctrls.enable_ept = 1; // enable EPT paging
+ vmx_state->sec_proc_ctrls.unrstrct_guest = 1; // enable unrestricted guest operation
- __asm__ __volatile__ ( "movq %%cs, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_CS_SELECTOR, tmp);
- __asm__ __volatile__ ( "movq %%ss, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_SS_SELECTOR, tmp);
+ /* Disable shadow paging stuff */
+ vmx_state->pri_proc_ctrls.cr3_ld_exit = 0;
+ vmx_state->pri_proc_ctrls.cr3_str_exit = 0;
- __asm__ __volatile__ ( "movq %%ds, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_DS_SELECTOR, tmp);
+ vmx_state->pri_proc_ctrls.invlpg_exit = 0;
- __asm__ __volatile__ ( "movq %%es, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_ES_SELECTOR, tmp);
- __asm__ __volatile__ ( "movq %%fs, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_FS_SELECTOR, tmp);
+ if (v3_init_ept(core, &hw_info) == -1) {
+ PrintError("Error initializing EPT\n");
+ return -1;
+ }
- __asm__ __volatile__ ( "movq %%gs, %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_GS_SELECTOR, tmp);
+ } else {
+ PrintError("Invalid Virtual paging mode\n");
+ return -1;
+ }
- __asm__ __volatile__ ( "str %0; "
- : "=q"(tmp)
- :
- );
- vmcs_write(VMCS_HOST_TR_SELECTOR, tmp);
+ // hook vmx msrs
-#define SYSENTER_CS_MSR 0x00000174
-#define SYSENTER_ESP_MSR 0x00000175
-#define SYSENTER_EIP_MSR 0x00000176
+ // Setup SYSCALL/SYSENTER MSRs in load/store area
+
+ // save STAR, LSTAR, FMASK, KERNEL_GS_BASE MSRs in MSR load/store area
+ {
+#define IA32_STAR 0xc0000081
+#define IA32_LSTAR 0xc0000082
+#define IA32_FMASK 0xc0000084
+#define IA32_KERN_GS_BASE 0xc0000102
- // SYSENTER CS MSR
- v3_get_msr(SYSENTER_CS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- vmcs_write(VMCS_HOST_SYSENTER_CS, tmp_msr.value);
+#define IA32_CSTAR 0xc0000083 // Compatibility mode STAR (ignored for now... hopefully its not that important...)
- // SYSENTER_ESP MSR
- v3_get_msr(SYSENTER_ESP_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- vmcs_write(VMCS_HOST_SYSENTER_ESP, tmp_msr.value);
+ int msr_ret = 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);
+ struct vmcs_msr_entry * exit_store_msrs = NULL;
+ struct vmcs_msr_entry * exit_load_msrs = NULL;
+ struct vmcs_msr_entry * entry_load_msrs = NULL;;
+ int max_msrs = (hw_info.misc_info.max_msr_cache_size + 1) * 4;
+ V3_Print("Setting up MSR load/store areas (max_msr_count=%d)\n", max_msrs);
- // RIP
- // RSP
+ if (max_msrs < 4) {
+ PrintError("Max MSR cache size is too small (%d)\n", max_msrs);
+ return -1;
+ }
- return 0;
-}
+ vmx_state->msr_area = V3_VAddr(V3_AllocPages(1));
+ if (vmx_state->msr_area == NULL) {
+ PrintError("could not allocate msr load/store area\n");
+ return -1;
+ }
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_STORE_CNT, 4);
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_LOAD_CNT, 4);
+ msr_ret |= check_vmcs_write(VMCS_ENTRY_MSR_LOAD_CNT, 4);
+
+
+ exit_store_msrs = (struct vmcs_msr_entry *)(vmx_state->msr_area);
+ exit_load_msrs = (struct vmcs_msr_entry *)(vmx_state->msr_area + (sizeof(struct vmcs_msr_entry) * 4));
+ entry_load_msrs = (struct vmcs_msr_entry *)(vmx_state->msr_area + (sizeof(struct vmcs_msr_entry) * 8));
+ exit_store_msrs[0].index = IA32_STAR;
+ exit_store_msrs[1].index = IA32_LSTAR;
+ exit_store_msrs[2].index = IA32_FMASK;
+ exit_store_msrs[3].index = IA32_KERN_GS_BASE;
+
+ memcpy(exit_store_msrs, exit_load_msrs, sizeof(struct vmcs_msr_entry) * 4);
+ memcpy(exit_store_msrs, entry_load_msrs, sizeof(struct vmcs_msr_entry) * 4);
+
+
+ v3_get_msr(IA32_STAR, &(exit_load_msrs[0].hi), &(exit_load_msrs[0].lo));
+ v3_get_msr(IA32_LSTAR, &(exit_load_msrs[1].hi), &(exit_load_msrs[1].lo));
+ v3_get_msr(IA32_FMASK, &(exit_load_msrs[2].hi), &(exit_load_msrs[2].lo));
+ v3_get_msr(IA32_KERN_GS_BASE, &(exit_load_msrs[3].hi), &(exit_load_msrs[3].lo));
-static addr_t vmxon_ptr_phys;
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_STORE_ADDR, (addr_t)V3_PAddr(exit_store_msrs));
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_LOAD_ADDR, (addr_t)V3_PAddr(exit_load_msrs));
+ msr_ret |= check_vmcs_write(VMCS_ENTRY_MSR_LOAD_ADDR, (addr_t)V3_PAddr(entry_load_msrs));
+ }
-#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;
+ /* Sanity check ctrl/reg fields against hw_defaults */
- 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);
- val &= mask_msr.lo;
- val &= mask_msr.hi;
+ /*** Write all the info to the VMCS ***/
- return val;
-}
+ /*
+ {
+ // IS THIS NECESSARY???
+#define DEBUGCTL_MSR 0x1d9
+ struct v3_msr tmp_msr;
+ v3_get_msr(DEBUGCTL_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ vmx_ret |= check_vmcs_write(VMCS_GUEST_DBG_CTL, tmp_msr.value);
+ core->dbg_regs.dr7 = 0x400;
+ }
+ */
+#ifdef __V3_64BIT__
+ vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, (addr_t)0xffffffffffffffffULL);
+#else
+ vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, (addr_t)0xffffffffUL);
+ vmx_ret |= check_vmcs_write(VMCS_LINK_PTR_HIGH, (addr_t)0xffffffffUL);
+#endif
-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);
+ if (v3_update_vmcs_ctrl_fields(core)) {
+ PrintError("Could not write control fields!\n");
+ return -1;
+ }
+
+ if (v3_update_vmcs_host_state(core)) {
+ PrintError("Could not write host state\n");
+ return -1;
+ }
- 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;
+ // reenable global interrupts for vm state initialization now
+ // that the vm state is initialized. If another VM kicks us off,
+ // it'll update our vmx state so that we know to reload ourself
+ v3_enable_ints();
+
+ return 0;
+}
- PrintDebug("MSR %x = %p, %x = %p \n", msr_num0, (void*)msr0_val, msr_num1, (void*)msr1_val);
+int v3_init_vmx_vmcs(struct guest_info * core, 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));
+ memset(vmx_state, 0, sizeof(struct vmx_data));
- val &= msr0_val;
- val &= msr1_val;
+ PrintDebug("vmx_data pointer: %p\n", (void *)vmx_state);
- return val;
-}
+ PrintDebug("Allocating VMCS\n");
+ vmx_state->vmcs_ptr_phys = allocate_vmcs();
+
+ PrintDebug("VMCS pointer: %p\n", (void *)(vmx_state->vmcs_ptr_phys));
-static int setup_base_host_state() {
+ core->vmm_data = vmx_state;
+ vmx_state->state = VMX_UNLAUNCHED;
+
+ PrintDebug("Initializing VMCS (addr=%p)\n", core->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);
- // vmwrite(HOST_IDTR_BASE,
+ if (vmx_ret != VMX_SUCCESS) {
+ PrintError("VMCLEAR failed\n");
+ return -1;
+ }
+ if (vm_class == V3_PC_VM) {
+ PrintDebug("Initializing VMCS\n");
+ if (init_vmcs_bios(core, vmx_state) == -1) {
+ PrintError("Error initializing VMCS to BIOS state\n");
+ return -1;
+ }
+ } else {
+ PrintError("Invalid VM Class\n");
+ return -1;
+ }
+
+ PrintDebug("Serializing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys);
+ vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys);
+ return 0;
}
-#endif
+int v3_deinit_vmx_vmcs(struct guest_info * core) {
+ struct vmx_data * vmx_state = core->vmm_data;
-static void setup_v8086_mode_for_boot(struct guest_info* vm_info)
-{
+ V3_FreePages((void *)(vmx_state->vmcs_ptr_phys), 1);
+ V3_FreePages(V3_PAddr(vmx_state->msr_area), 1);
- ((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;
+ V3_Free(vmx_state);
- vm_info->rip = 0xfff0;
+ return 0;
+}
- 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;
- 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;
- }
+
+#ifdef V3_CONFIG_CHECKPOINT
+/*
+ * JRL: This is broken
+ */
+int v3_vmx_save_core(struct guest_info * core, void * ctx){
+ uint64_t vmcs_ptr = vmcs_store();
+
+ v3_chkpt_save(ctx, "vmcs_data", PAGE_SIZE, (void *)vmcs_ptr);
+
+ return 0;
}
+int v3_vmx_load_core(struct guest_info * core, void * ctx){
+ struct vmx_data * vmx_info = (struct vmx_data *)(core->vmm_data);
+ struct cr0_32 * shadow_cr0;
+ char vmcs[PAGE_SIZE_4KB];
-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));
+ v3_chkpt_load(ctx, "vmcs_data", PAGE_SIZE_4KB, vmcs);
+ vmcs_clear(vmx_info->vmcs_ptr_phys);
+ vmcs_load((addr_t)vmcs);
- memset(vmcs_page, 0, 4096);
+ v3_vmx_save_vmcs(core);
+
+ shadow_cr0 = (struct cr0_32 *)&(core->ctrl_regs.cr0);
- 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);
- return (addr_t)V3_PAddr((void*)vmcs_page);
+ /* Get the CPU mode to set the guest_ia32e entry ctrl */
+
+ if (core->shdw_pg_mode == SHADOW_PAGING) {
+ if (v3_get_vm_mem_mode(core) == VIRTUAL_MEM) {
+ if (v3_activate_shadow_pt(core) == -1) {
+ PrintError("Failed to activate shadow page tables\n");
+ return -1;
+ }
+ } else {
+ if (v3_activate_passthrough_pt(core) == -1) {
+ PrintError("Failed to activate passthrough page tables\n");
+ return -1;
+ }
+ }
+ }
+
+ return 0;
}
+#endif
+void v3_flush_vmx_vm_core(struct guest_info * core) {
+ struct vmx_data * vmx_info = (struct vmx_data *)(core->vmm_data);
+ vmcs_clear(vmx_info->vmcs_ptr_phys);
+ vmx_info->state = VMX_UNLAUNCHED;
+}
-static void init_vmcs_bios(struct guest_info * vm_info)
-{
- setup_v8086_mode_for_boot(vm_info);
- // TODO: Fix vmcs fields so they're 32-bit
-
+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));
+
+ if ((info->intr_core_state.irq_started == 1) && (idt_vec_info.valid == 0)) {
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Calling v3_injecting_intr\n");
+#endif
+ info->intr_core_state.irq_started = 0;
+ v3_injecting_intr(info, info->intr_core_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_core_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_core_state));
-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);
+ /* Check for pending exceptions to inject */
+ if (v3_excp_pending(info)) {
+ struct vmx_entry_int_info int_info;
+ int_info.value = 0;
- struct vmx_data* data;
+ // 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);
- data = (struct vmx_data*)V3_Malloc(sizeof(struct vmx_data));
- PrintDebug("vmx_data pointer: %p\n",(void*)data);
+ 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;
- PrintDebug("Allocating VMCS\n");
- data->vmcs_ptr_phys = allocate_vmcs();
- PrintDebug("VMCS pointer: %p\n",(void*)data->vmcs_ptr_phys);
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Injecting exception %d with error code %x\n",
+ int_info.vector, info->excp_state.excp_error_code);
+#endif
+ }
- info->vmm_data = (void *)data;
+ int_info.valid = 1;
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Injecting exception %d (EIP=%p)\n", int_info.vector, (void *)(addr_t)info->rip);
+#endif
+ check_vmcs_write(VMCS_ENTRY_INT_INFO, int_info.value);
- PrintDebug("Initializing VMCS (addr=%p)\n", info->vmm_data);
- init_vmcs_bios(info);
+ v3_injecting_excp(info, int_info.vector);
- // v3_post_config_guest(info, config_ptr);
+ } else if ((((struct rflags *)&(info->ctrl_regs.rflags))->intr == 1) &&
+ (intr_core_state.val == 0)) {
+
+ if ((info->intr_core_state.irq_started == 1) && (idt_vec_info.valid == 1)) {
- return 0;
-}
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("IRQ pending from previous injection\n");
+#endif
+ // 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_core_state.irq_vector = v3_get_intr(info);
+ ent_int.vector = info->intr_core_state.irq_vector;
+ ent_int.type = 0;
+ ent_int.error_code = 0;
+ ent_int.valid = 1;
+
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Injecting Interrupt %d at exit %u(EIP=%p)\n",
+ info->intr_core_state.irq_vector,
+ (uint32_t)info->num_exits,
+ (void *)(addr_t)info->rip);
+#endif
-static int inline check_vmcs_write(vmcs_field_t field, addr_t val)
-{
- int ret = 0;
- ret = vmcs_write(field,val);
+ check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value);
+ info->intr_core_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;
- if (ret != VMX_SUCCESS) {
- PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
- return 1;
+ check_vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
+
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Enabling Interrupt-Window exiting: %d\n", instr_len);
+#endif
+
+ vmx_info->pri_proc_ctrls.int_wndw_exit = 1;
+ check_vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
}
+
return 0;
}
-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 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);
+
+ 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 int inline vmcs_write_guest_segments(struct guest_info* info)
-{
+/*
+ * 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;
- struct vmcs_segment_access access;
+ uint32_t tsc_offset_low, tsc_offset_high;
+ struct vmx_exit_info exit_info;
+ struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
- /* CS Segment */
- translate_segment_access(&(info->segments.cs), &access);
+ // Conditionally yield the CPU if the timeslice has expired
+ v3_yield_cond(info);
- 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);
+ // Perform any additional yielding needed for time adjustment
+ v3_adjust_time(info);
- /* SS Segment */
- translate_segment_access(&(info->segments.ss), &access);
+ // disable global interrupts for vm state transition
+ v3_disable_ints();
- 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);
+ // Update timer devices late after being in the VM so that as much
+ // of hte time in the VM is accounted for as possible. Also do it before
+ // updating IRQ entry state so that any interrupts the timers raise get
+ // handled on the next VM entry. Must be done with interrupts disabled.
+ v3_update_timers(info);
- /* DS Segment */
- translate_segment_access(&(info->segments.ds), &access);
+ if (vmcs_store() != vmx_info->vmcs_ptr_phys) {
+ vmcs_clear(vmx_info->vmcs_ptr_phys);
+ vmcs_load(vmx_info->vmcs_ptr_phys);
+ vmx_info->state = VMX_UNLAUNCHED;
+ }
- 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);
+ v3_vmx_restore_vmcs(info);
- /* ES Segment */
- translate_segment_access(&(info->segments.es), &access);
+#ifdef V3_CONFIG_SYMCALL
+ if (info->sym_core_state.symcall_state.sym_call_active == 0) {
+ update_irq_entry_state(info);
+ }
+#else
+ update_irq_entry_state(info);
+#endif
- 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);
+ {
+ addr_t guest_cr3;
+ vmcs_read(VMCS_GUEST_CR3, &guest_cr3);
+ vmcs_write(VMCS_GUEST_CR3, guest_cr3);
+ }
- /* FS Segment */
- translate_segment_access(&(info->segments.fs), &access);
+ // Perform last-minute time bookkeeping prior to entering the VM
+ v3_time_enter_vm(info);
- 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);
+ tsc_offset_high = (uint32_t)((v3_tsc_host_offset(&info->time_state) >> 32) & 0xffffffff);
+ tsc_offset_low = (uint32_t)(v3_tsc_host_offset(&info->time_state) & 0xffffffff);
+ check_vmcs_write(VMCS_TSC_OFFSET_HIGH, tsc_offset_high);
+ check_vmcs_write(VMCS_TSC_OFFSET, tsc_offset_low);
- /* GS Segment */
- translate_segment_access(&(info->segments.gs), &access);
+ if (v3_update_vmcs_host_state(info)) {
+ v3_enable_ints();
+ PrintError("Could not write host state\n");
+ return -1;
+ }
- 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);
- return ret;
-}
+ if (vmx_info->state == VMX_UNLAUNCHED) {
+ vmx_info->state = VMX_LAUNCHED;
-static int start_vmx_guest(struct guest_info* info) {
- struct vmx_data * vmx_data = (struct vmx_data *)info->vmm_data;
- int vmx_ret;
+ info->vm_info->run_state = VM_RUNNING;
+ ret = v3_vmx_launch(&(info->vm_regs), info, &(info->ctrl_regs));
+ } else {
+ V3_ASSERT(vmx_info->state != VMX_UNLAUNCHED);
+ ret = v3_vmx_resume(&(info->vm_regs), info, &(info->ctrl_regs));
+ }
+
- // Have to do a whole lot of flag setting here
- PrintDebug("Clearing VMCS\n");
- vmx_ret = vmcs_clear(vmx_data->vmcs_ptr_phys);
- if (vmx_ret != VMX_SUCCESS) {
- PrintError("VMCLEAR failed\n");
- return -1;
+ // PrintDebug("VMX Exit: ret=%d\n", ret);
+
+ if (ret != VMX_SUCCESS) {
+ uint32_t error = 0;
+ vmcs_read(VMCS_INSTR_ERR, &error);
+
+ v3_enable_ints();
+
+ PrintError("VMENTRY Error: %d (launch_ret = %d)\n", error, ret);
+ 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;
+
+ // Immediate exit from VM time bookkeeping
+ v3_time_exit_vm(info);
+
+ info->num_exits++;
+
+ /* Update guest state */
+ v3_vmx_save_vmcs(info);
+
+ // info->cpl = info->segments.cs.selector & 0x3;
+
+ 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));
+
+ if (info->shdw_pg_mode == NESTED_PAGING) {
+ check_vmcs_read(VMCS_GUEST_PHYS_ADDR, &(exit_info.ept_fault_addr));
}
+ //PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_info.exit_reason, exit_info.exit_qual);
- update_vmcs_host_state(info);
+ exit_log[info->num_exits % 10] = exit_info;
- // Setup guest state
- // TODO: This is not 32-bit safe!
- vmx_ret &= check_vmcs_write(VMCS_GUEST_RIP, info->rip);
+#ifdef V3_CONFIG_SYMCALL
+ if (info->sym_core_state.symcall_state.sym_call_active == 0) {
+ update_irq_exit_state(info);
+ }
+#else
+ update_irq_exit_state(info);
+#endif
- vmx_ret &= vmcs_write_guest_segments(info);
+ if (exit_info.exit_reason == VMEXIT_INTR_WINDOW) {
+ // This is a special case whose only job is to inject an interrupt
+ vmcs_read(VMCS_PROC_CTRLS, &(vmx_info->pri_proc_ctrls.value));
+ vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
+ vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
- if (vmx_ret != 0) {
- PrintError("Could not initialize VMCS segments\n");
- return -1;
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Interrupts available again! (RIP=%llx)\n", info->rip);
+#endif
}
- v3_print_vmcs_guest_state();
+ // reenable global interrupts after vm exit
+ v3_enable_ints();
+
+ // Conditionally yield the CPU if the timeslice has expired
+ v3_yield_cond(info);
+
+ if (v3_handle_vmx_exit(info, &exit_info) == -1) {
+ PrintError("Error in VMX exit handler (Exit reason=%x)\n", exit_info.exit_reason);
+ return -1;
+ }
- return -1;
+ return 0;
}
+int v3_start_vmx_guest(struct guest_info * info) {
+
+ PrintDebug("Starting VMX core %u\n", info->vcpu_id);
+
+ if (info->vcpu_id == 0) {
+ info->core_run_state = CORE_RUNNING;
+ info->vm_info->run_state = VM_RUNNING;
+ } else {
+
+ PrintDebug("VMX core %u: Waiting for core initialization\n", info->vcpu_id);
+
+ while (info->core_run_state == CORE_STOPPED) {
+ v3_yield(info);
+ //PrintDebug("VMX core %u: still waiting for INIT\n",info->vcpu_id);
+ }
+
+ PrintDebug("VMX core %u initialized\n", info->vcpu_id);
+
+ // We'll be paranoid about race conditions here
+ v3_wait_at_barrier(info);
+ }
+
+
+ PrintDebug("VMX core %u: I am starting at CS=0x%x (base=0x%p, limit=0x%x), RIP=0x%p\n",
+ info->vcpu_id, info->segments.cs.selector, (void *)(info->segments.cs.base),
+ info->segments.cs.limit, (void *)(info->rip));
+
+
+ PrintDebug("VMX core %u: Launching VMX VM on logical core %u\n", info->vcpu_id, info->pcpu_id);
+
+ v3_start_time(info);
+
+ while (1) {
+
+ if (info->vm_info->run_state == VM_STOPPED) {
+ info->core_run_state = CORE_STOPPED;
+ break;
+ }
+
+ if (v3_vmx_enter(info) == -1) {
+
+ addr_t host_addr;
+ addr_t linear_addr = 0;
+
+ info->vm_info->run_state = VM_ERROR;
+
+ V3_Print("VMX core %u: VMX ERROR!!\n", info->vcpu_id);
+
+ v3_print_guest_state(info);
+
+ V3_Print("VMX core %u\n", info->vcpu_id);
+
+ linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
+
+ if (info->mem_mode == PHYSICAL_MEM) {
+ v3_gpa_to_hva(info, linear_addr, &host_addr);
+ } else if (info->mem_mode == VIRTUAL_MEM) {
+ v3_gva_to_hva(info, linear_addr, &host_addr);
+ }
+
+ V3_Print("VMX core %u: Host Address of rip = 0x%p\n", info->vcpu_id, (void *)host_addr);
+
+ V3_Print("VMX core %u: Instr (15 bytes) at %p:\n", info->vcpu_id, (void *)host_addr);
+ v3_dump_mem((uint8_t *)host_addr, 15);
+
+ v3_print_stack(info);
+
+
+ v3_print_vmcs();
+ print_exit_log(info);
+ return -1;
+ }
+ v3_wait_at_barrier(info);
+ if (info->vm_info->run_state == VM_STOPPED) {
+ info->core_run_state = CORE_STOPPED;
+ break;
+ }
+/*
+ if ((info->num_exits % 5000) == 0) {
+ V3_Print("VMX Exit number %d\n", (uint32_t)info->num_exits);
+ }
+*/
+
+ }
+
+ return 0;
+}
+
+
+
+
+#define VMX_FEATURE_CONTROL_MSR 0x0000003a
+#define CPUID_VMX_FEATURES 0x00000005 /* LOCK and VMXON */
+#define CPUID_1_ECX_VTXFLAG 0x00000020
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) {
+ if ((feature_msr.lo & CPUID_VMX_FEATURES) != CPUID_VMX_FEATURES) {
PrintDebug("VMX is locked -- enable in the BIOS\n");
return 0;
}
return 1;
}
-static int has_vmx_nested_paging() {
+
+int v3_reset_vmx_vm_core(struct guest_info * core, addr_t rip) {
+ // init vmcs bios
+
+ if ((core->shdw_pg_mode == NESTED_PAGING) &&
+ (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_UG_CPU)) {
+ // easy
+ core->rip = 0;
+ core->segments.cs.selector = rip << 8;
+ core->segments.cs.limit = 0xffff;
+ core->segments.cs.base = rip << 12;
+ } else {
+ core->vm_regs.rdx = core->vcpu_id;
+ core->vm_regs.rbx = rip;
+ }
+
return 0;
}
-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) {
+ addr_t vmx_on_region = 0;
+
+ if (cpu_id == 0) {
+ if (v3_init_vmx_hw(&hw_info) == -1) {
+ PrintError("Could not initialize VMX hardware features on cpu %d\n", cpu_id);
+ return;
+ }
+ }
+
+ enable_vmx();
-
- __asm__ __volatile__ (
- "movq %%cr4, %%rbx; "
- "orq $0x00002000,%%rbx; "
- "movq %%rbx, %%cr4;"
- :
- :
- : "%rbx"
- );
-
-
-
- // Should check and return Error here....
- __asm__ __volatile__ (
- "movq %%cr0, %%rbx; "
- "orq $0x00000020,%%rbx; "
- "movq %%rbx, %%cr0;"
- :
- :
- : "%rbx"
- );
// Setup VMXON Region
- vmxon_ptr_phys = allocate_vmcs();
- PrintDebug("VMXON pointer: 0x%p\n", (void*)vmxon_ptr_phys);
+ vmx_on_region = allocate_vmcs();
+
- if (v3_enable_vmx(vmxon_ptr_phys) == VMX_SUCCESS) {
- PrintDebug("VMX Enabled\n");
+ if (vmx_on(vmx_on_region) == VMX_SUCCESS) {
+ V3_Print("VMX Enabled\n");
+ host_vmcs_ptrs[cpu_id] = vmx_on_region;
} else {
- PrintError("VMX initialization failure\n");
- return;
+ V3_Print("VMX already enabled\n");
+ V3_FreePages((void *)vmx_on_region, 1);
}
-
- if (has_vmx_nested_paging() == 1) {
- v3_cpu_type = V3_VMX_EPT_CPU;
- } else {
- v3_cpu_type = V3_VMX_CPU;
+ PrintDebug("VMXON pointer: 0x%p\n", (void *)host_vmcs_ptrs[cpu_id]);
+
+ {
+ struct vmx_sec_proc_ctrls sec_proc_ctrls;
+ sec_proc_ctrls.value = v3_vmx_get_ctrl_features(&(hw_info.sec_proc_ctrls));
+
+ if (sec_proc_ctrls.enable_ept == 0) {
+ V3_Print("VMX EPT (Nested) Paging not supported\n");
+ v3_cpu_types[cpu_id] = V3_VMX_CPU;
+ } else if (sec_proc_ctrls.unrstrct_guest == 0) {
+ V3_Print("VMX EPT (Nested) Paging supported\n");
+ v3_cpu_types[cpu_id] = V3_VMX_EPT_CPU;
+ } else {
+ V3_Print("VMX EPT (Nested) Paging + Unrestricted guest supported\n");
+ v3_cpu_types[cpu_id] = V3_VMX_EPT_UG_CPU;
+ }
}
+}
+
+
+void v3_deinit_vmx_cpu(int cpu_id) {
+ extern v3_cpu_arch_t v3_cpu_types[];
+ v3_cpu_types[cpu_id] = V3_INVALID_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;
+ if (host_vmcs_ptrs[cpu_id] != 0) {
+ V3_Print("Disabling VMX\n");
+ if (vmx_off() != VMX_SUCCESS) {
+ PrintError("Error executing VMXOFF\n");
+ }
+
+ V3_FreePages((void *)host_vmcs_ptrs[cpu_id], 1);
+
+ host_vmcs_ptrs[cpu_id] = 0;
+ }
}
