* 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/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>
-#ifndef CONFIG_DEBUG_VMX
+#ifndef V3_CONFIG_DEBUG_VMX
#undef PrintDebug
#define PrintDebug(fmt, args...)
#endif
-static addr_t host_vmcs_ptrs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
-static addr_t active_vmcs_ptrs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
+/* 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 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;
- ret = vmcs_write(field,val);
+ ret = vmcs_write(field, val);
if (ret != VMX_SUCCESS) {
PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
static addr_t allocate_vmcs() {
- reg_ex_t msr;
struct vmcs_data * vmcs_page = NULL;
PrintDebug("Allocating page\n");
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);
+ 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);
}
-static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state) {
+static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state) {
int vmx_ret = 0;
- struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
// disable global interrupts for vm state initialization
v3_disable_ints();
PrintDebug("Loading VMCS\n");
vmx_ret = vmcs_load(vmx_state->vmcs_ptr_phys);
- active_vmcs_ptrs[V3_Get_CPU()] = vmx_info->vmcs_ptr_phys;
vmx_state->state = VMX_UNLAUNCHED;
if (vmx_ret != VMX_SUCCESS) {
}
+ /*** Setup default state from HW ***/
- /******* Setup Host State **********/
+ 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;
- /* Cache GDTR, IDTR, and TR in host struct */
- addr_t gdtr_base;
- struct {
- uint16_t selector;
- addr_t base;
- } __attribute__((packed)) tmp_seg;
-
+ /* 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);
- __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;
-
-
- /********** Setup and VMX Control Fields from MSR ***********/
- /* Setup IO map */
+ /******* Setup Host State **********/
+ /* Cache GDTR, IDTR, and TR in host struct */
- struct v3_msr tmp_msr;
- v3_get_msr(VMX_PINBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
+ /********** Setup VMX Control Fields ***********/
/* 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;
- v3_get_msr(VMX_PROCBASED_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- 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;
+
+
+ vmx_state->pri_proc_ctrls.pause_exit = 0;
vmx_state->pri_proc_ctrls.tsc_offset = 1;
-#ifdef CONFIG_TIME_VIRTUALIZE_TSC
+#ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
vmx_state->pri_proc_ctrls.rdtsc_exit = 1;
#endif
- vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_A_ADDR, (addr_t)V3_PAddr(info->vm_info->io_map.arch_data));
+ /* 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(info->vm_info->io_map.arch_data) + PAGE_SIZE_4KB);
+ (addr_t)V3_PAddr(core->vm_info->io_map.arch_data) + PAGE_SIZE_4KB);
- vmx_ret |= check_vmcs_write(VMCS_MSR_BITMAP, (addr_t)V3_PAddr(info->vm_info->msr_map.arch_data));
-
- 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;
-
- if ((vmx_state->exit_ctrls.save_efer == 1) || (vmx_state->exit_ctrls.ld_efer == 1)) {
- vmx_state->ia32e_avail = 1;
- }
+ 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));
- v3_get_msr(VMX_ENTRY_CTLS_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- vmx_state->entry_ctrls.value = tmp_msr.lo;
- {
- 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 ***********/
- info->rip = 0xd0000;
- info->vm_regs.rsp = 0x80000;
+#ifdef __V3_64BIT__
+ // Ensure host runs in 64-bit mode at each VM EXIT
+ vmx_state->exit_ctrls.host_64_on = 1;
+#endif
- struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags);
- flags->rsvd1 = 1;
+ // Hook all accesses to EFER register
+ v3_hook_msr(core->vm_info, EFER_MSR,
+ &v3_handle_efer_read,
+ &v3_handle_efer_write,
+ core);
- /* 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);
+ // Restore host's EFER register on each VM EXIT
+ vmx_state->exit_ctrls.ld_efer = 1;
- v3_get_msr(VMX_CR4_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- PrintDebug("CR4 MSR: %p\n", (void *)(addr_t)tmp_msr.value);
+ // 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;
+ // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE);
-#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) {
+ if (core->shdw_pg_mode == SHADOW_PAGING) {
PrintDebug("Creating initial shadow page table\n");
- if (v3_init_passthrough_pts(info) == -1) {
+ 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));
-
- vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG) );
- vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE);
-
- info->ctrl_regs.cr3 = info->direct_map_pt;
+ core->ctrl_regs.cr3 = core->direct_map_pt;
// vmx_state->pinbased_ctrls |= NMI_EXIT;
/* 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;
- // Setup segment registers
- {
- struct v3_segment * seg_reg = (struct v3_segment *)&(info->segments);
+ // Setup VMX Assist
+ v3_vmxassist_init(core, vmx_state);
+
+ } 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;
+
+ /* 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
- int i;
- for (i = 0; i < 10; i++) {
- seg_reg[i].selector = 3 << 3;
- seg_reg[i].limit = 0xffff;
- seg_reg[i].base = 0x0;
+
+ if (v3_init_ept(core, &hw_info) == -1) {
+ PrintError("Error initializing EPT\n");
+ return -1;
}
- info->segments.cs.selector = 2<<3;
-
- /* 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;
+ } 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
+
+
+ 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
+
+
+ core->segments.cs.selector = 0xf000;
+ core->segments.cs.limit = 0xffff;
+ core->segments.cs.base = 0x0000000f0000LL;
+
+ // (raw attributes = 0xf3)
+ core->segments.cs.type = 0xb;
+ core->segments.cs.system = 0x1;
+ core->segments.cs.dpl = 0x0;
+ core->segments.cs.present = 1;
+
+
+
+ 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;
+
+
+ seg->type = 0x3;
+ seg->system = 0x1;
+ seg->dpl = 0x0;
+ seg->present = 1;
+ // seg->granularity = 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;
+ core->segments.gdtr.limit = 0x0000ffff;
+ core->segments.gdtr.base = 0x0000000000000000LL;
-
- /************* 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 (v3_gpa_to_hva(info, VMXASSIST_GDT, &vmxassist_gdt) == -1) {
- PrintError("Could not find VMXASSIST GDT destination\n");
+ core->segments.idtr.limit = 0x0000ffff;
+ core->segments.idtr.base = 0x0000000000000000LL;
+
+ 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;
+
+ 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
+
+
+ /* Disable shadow paging stuff */
+ 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;
+
+
+ if (v3_init_ept(core, &hw_info) == -1) {
+ PrintError("Error initializing EPT\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;
+ } else {
+ PrintError("Invalid Virtual paging mode\n");
+ return -1;
}
-
- // setup VMXASSIST
- {
-#define VMXASSIST_START 0x000d0000
- extern uint8_t v3_vmxassist_start[];
- extern uint8_t v3_vmxassist_end[];
- addr_t vmxassist_dst = 0;
-
- if (v3_gpa_to_hva(info, VMXASSIST_START, &vmxassist_dst) == -1) {
- PrintError("Could not find VMXASSIST destination\n");
+
+
+ // hook vmx msrs
+
+ // 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
+
+#define IA32_CSTAR 0xc0000083 // Compatibility mode STAR (ignored for now... hopefully its not that important...)
+
+ int msr_ret = 0;
+
+ 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);
+
+ if (max_msrs < 4) {
+ PrintError("Max MSR cache size is too small (%d)\n", max_msrs);
+ return -1;
+ }
+
+ 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;
}
- memcpy((void *)vmxassist_dst, v3_vmxassist_start, v3_vmxassist_end - v3_vmxassist_start);
+ 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));
+
+ 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));
+
}
- /*** Write all the info to the VMCS ***/
+ /* Sanity check ctrl/reg fields against hw_defaults */
+
-#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);
- info->dbg_regs.dr7 = 0x400;
+
+ /*** Write all the info to the VMCS ***/
+
+ /*
+ {
+ // 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);
vmx_ret |= check_vmcs_write(VMCS_LINK_PTR_HIGH, (addr_t)0xffffffffUL);
#endif
- if (v3_update_vmcs_ctrl_fields(info)) {
+
+
+
+ if (v3_update_vmcs_ctrl_fields(core)) {
PrintError("Could not write control fields!\n");
return -1;
}
- if (v3_update_vmcs_host_state(info)) {
+ if (v3_update_vmcs_host_state(core)) {
PrintError("Could not write host state\n");
return -1;
}
-
- vmx_state->assist_state = VMXASSIST_DISABLED;
-
// 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_disable_ints();
+ v3_enable_ints();
return 0;
}
-int v3_init_vmx_vmcs(struct guest_info * info, v3_vm_class_t vm_class) {
+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));
PrintDebug("vmx_data pointer: %p\n", (void *)vmx_state);
PrintDebug("VMCS pointer: %p\n", (void *)(vmx_state->vmcs_ptr_phys));
- info->vmm_data = vmx_state;
+ core->vmm_data = vmx_state;
vmx_state->state = VMX_UNLAUNCHED;
- PrintDebug("Initializing VMCS (addr=%p)\n", info->vmm_data);
+ PrintDebug("Initializing VMCS (addr=%p)\n", core->vmm_data);
// TODO: Fix vmcs fields so they're 32-bit
if (vm_class == V3_PC_VM) {
PrintDebug("Initializing VMCS\n");
- init_vmcs_bios(info, vmx_state);
+ 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;
}
struct vmx_data * vmx_state = core->vmm_data;
V3_FreePages((void *)(vmx_state->vmcs_ptr_phys), 1);
+ V3_FreePages(V3_PAddr(vmx_state->msr_area), 1);
V3_Free(vmx_state);
}
+
+#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];
+
+ v3_chkpt_load(ctx, "vmcs_data", PAGE_SIZE_4KB, vmcs);
+
+ vmcs_clear(vmx_info->vmcs_ptr_phys);
+ vmcs_load((addr_t)vmcs);
+
+ v3_vmx_save_vmcs(core);
+
+ shadow_cr0 = (struct cr0_32 *)&(core->ctrl_regs.cr0);
+
+
+ /* 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 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 CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Calling v3_injecting_intr\n");
+#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);
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",
+#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
}
int_info.valid = 1;
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Injecting exception %d (EIP=%p)\n", int_info.vector, (void *)(addr_t)info->rip);
+#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);
if ((info->intr_core_state.irq_started == 1) && (idt_vec_info.valid == 1)) {
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("IRQ pending from previous injection\n");
+#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
ent_int.error_code = 0;
ent_int.valid = 1;
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Injecting Interrupt %d at exit %u(EIP=%p)\n",
+#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);
check_vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Enabling Interrupt-Window exiting: %d\n", 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;
// Perform any additional yielding needed for time adjustment
v3_adjust_time(info);
- // Update timer devices prior to entering VM.
- v3_update_timers(info);
-
// disable global interrupts for vm state transition
v3_disable_ints();
+ // 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);
+
+ 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;
+ }
+
v3_vmx_restore_vmcs(info);
-#ifdef CONFIG_SYMCALL
+#ifdef V3_CONFIG_SYMCALL
if (info->sym_core_state.symcall_state.sym_call_active == 0) {
update_irq_entry_state(info);
}
check_vmcs_write(VMCS_TSC_OFFSET_HIGH, tsc_offset_high);
check_vmcs_write(VMCS_TSC_OFFSET, tsc_offset_low);
- if (active_vmcs_ptrs[V3_Get_CPU()] != vmx_info->vmcs_ptr_phys) {
- vmcs_load(vmx_info->vmcs_ptr_phys);
- active_vmcs_ptrs[V3_Get_CPU()] = vmx_info->vmcs_ptr_phys;
+ if (v3_update_vmcs_host_state(info)) {
+ v3_enable_ints();
+ PrintError("Could not write host state\n");
+ return -1;
}
+
if (vmx_info->state == VMX_UNLAUNCHED) {
vmx_info->state = VMX_LAUNCHED;
+
info->vm_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);
if (ret != VMX_SUCCESS) {
uint32_t error = 0;
-
vmcs_read(VMCS_INSTR_ERR, &error);
- PrintError("VMENTRY Error: %d\n", error);
+ v3_enable_ints();
+
+ PrintError("VMENTRY Error: %d (launch_ret = %d)\n", error, ret);
return -1;
}
+
+
// Immediate exit from VM time bookkeeping
v3_time_exit_vm(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);
exit_log[info->num_exits % 10] = exit_info;
-
-#ifdef CONFIG_SYMCALL
+#ifdef V3_CONFIG_SYMCALL
if (info->sym_core_state.symcall_state.sym_call_active == 0) {
update_irq_exit_state(info);
}
vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Interrupts available again! (RIP=%llx)\n", info->rip);
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print("Interrupts available again! (RIP=%llx)\n", info->rip);
#endif
}
v3_yield_cond(info);
if (v3_handle_vmx_exit(info, &exit_info) == -1) {
- PrintError("Error in VMX exit handler\n");
+ PrintError("Error in VMX exit handler (Exit reason=%x)\n", exit_info.exit_reason);
return -1;
}
int v3_start_vmx_guest(struct guest_info * info) {
- PrintDebug("Starting VMX core %u\n", info->cpu_id);
+ PrintDebug("Starting VMX core %u\n", info->vcpu_id);
- if (info->cpu_id == 0) {
+ 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->cpu_id);
+ 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->cpu_id);
+ //PrintDebug("VMX core %u: still waiting for INIT\n",info->vcpu_id);
}
- PrintDebug("VMX core %u initialized\n", info->cpu_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->cpu_id, info->segments.cs.selector, (void *)(info->segments.cs.base),
+ 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\n", info->cpu_id);
+ PrintDebug("VMX core %u: Launching VMX VM on logical core %u\n", info->vcpu_id, info->pcpu_id);
v3_start_time(info);
}
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) {
}
+
+
+#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;
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
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_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));
+ addr_t vmx_on_region = 0;
-#ifdef __V3_64BIT__
- __asm__ __volatile__ (
- "movq %%cr4, %%rbx;"
- "orq $0x00002000, %%rbx;"
- "movq %%rbx, %0;"
- : "=m"(ret)
- :
- : "%rbx"
- );
-
- if ((~ret & tmp_msr.value) == 0) {
- __asm__ __volatile__ (
- "movq %0, %%cr4;"
- :
- : "q"(ret)
- );
- } else {
- PrintError("Invalid CR4 Settings!\n");
- return;
- }
-
- __asm__ __volatile__ (
- "movq %%cr0, %%rbx; "
- "orq $0x00000020,%%rbx; "
- "movq %%rbx, %%cr0;"
- :
- :
- : "%rbx"
- );
-#elif __V3_32BIT__
- __asm__ __volatile__ (
- "movl %%cr4, %%ecx;"
- "orl $0x00002000, %%ecx;"
- "movl %%ecx, %0;"
- : "=m"(ret)
- :
- : "%ecx"
- );
-
- if ((~ret & tmp_msr.value) == 0) {
- __asm__ __volatile__ (
- "movl %0, %%cr4;"
- :
- : "q"(ret)
- );
- } else {
- PrintError("Invalid CR4 Settings!\n");
- return;
+ 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;
+ }
}
- __asm__ __volatile__ (
- "movl %%cr0, %%ecx; "
- "orl $0x00000020,%%ecx; "
- "movl %%ecx, %%cr0;"
- :
- :
- : "%ecx"
- );
-
-#endif
-
- //
- // Should check and return Error here....
+ enable_vmx();
// Setup VMXON Region
- host_vmcs_ptrs[cpu_id] = allocate_vmcs();
+ vmx_on_region = allocate_vmcs();
- PrintDebug("VMXON pointer: 0x%p\n", (void *)host_vmcs_ptrs[cpu_id]);
- if (v3_enable_vmx(host_vmcs_ptrs[cpu_id]) == 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_types[cpu_id] = V3_VMX_EPT_CPU;
- } else {
- v3_cpu_types[cpu_id] = 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;
- V3_FreePages((void *)host_vmcs_ptrs[cpu_id], 1);
+
+ 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;
+ }
}
