* 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_lowlevel.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>
+#include <palacios/vmm_timeout.h>
+#include <palacios/vmm_debug.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>
+
+#ifdef V3_CONFIG_MEM_TRACK
+#include <palacios/vmm_mem_track.h>
+#endif
-#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};
+/* 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_mach_type;
+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);
+ PrintError(VM_NONE, VCORE_NONE, "VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
return 1;
}
+
+
+
return 0;
}
ret = vmcs_read(field, val);
if (ret != VMX_SUCCESS) {
- PrintError("VMREAD error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
+ PrintError(VM_NONE, VCORE_NONE, "VMREAD error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
}
return ret;
}
-#if 0
-// For the 32 bit reserved bit fields
-// MB1s are in the low 32 bits, MBZs are in the high 32 bits of the MSR
-static uint32_t sanitize_bits1(uint32_t msr_num, uint32_t val) {
- v3_msr_t mask_msr;
-
- PrintDebug("sanitize_bits1 (MSR:%x)\n", msr_num);
- v3_get_msr(msr_num, &mask_msr.hi, &mask_msr.lo);
- PrintDebug("MSR %x = %x : %x \n", msr_num, mask_msr.hi, mask_msr.lo);
- val |= mask_msr.lo;
- val |= mask_msr.hi;
-
- return val;
-}
+static addr_t allocate_vmcs() {
+ void *temp;
+ struct vmcs_data * vmcs_page = NULL;
+ PrintDebug(VM_NONE, VCORE_NONE, "Allocating page\n");
+ temp = V3_AllocPages(1); // need not be shadow-safe, not exposed to guest
+ if (!temp) {
+ PrintError(VM_NONE, VCORE_NONE, "Cannot allocate VMCS\n");
+ return -1;
+ }
+ vmcs_page = (struct vmcs_data *)V3_VAddr(temp);
+ memset(vmcs_page, 0, 4096);
-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;
+ vmcs_page->revision = hw_info.basic_info.revision;
+ PrintDebug(VM_NONE, VCORE_NONE, "VMX Revision: 0x%x\n", vmcs_page->revision);
- PrintDebug("sanitize_bits2 (MSR0=%x, MSR1=%x)\n", msr_num0, msr_num1);
+ return (addr_t)V3_PAddr((void *)vmcs_page);
+}
- v3_get_msr(msr_num0, &msr0.hi, &msr0.lo);
- v3_get_msr(msr_num1, &msr1.hi, &msr1.lo);
-
- // This generates a mask that is the natural bit width of the CPU
- msr0_val = msr0.value;
- msr1_val = msr1.value;
- PrintDebug("MSR %x = %p, %x = %p \n", msr_num0, (void*)msr0_val, msr_num1, (void*)msr1_val);
+#if 0
+static int debug_efer_read(struct guest_info * core, uint_t msr, struct v3_msr * src, void * priv_data) {
+ struct v3_msr * efer = (struct v3_msr *)&(core->ctrl_regs.efer);
+ V3_Print(core->vm_info, core, "\n\nEFER READ (val = %p)\n", (void *)efer->value);
+
+ v3_print_guest_state(core);
+ v3_print_vmcs();
- val |= msr0_val;
- val |= msr1_val;
- return val;
+ src->value = efer->value;
+ return 0;
}
+static int debug_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data) {
+ struct v3_msr * efer = (struct v3_msr *)&(core->ctrl_regs.efer);
+ V3_Print(core->vm_info, core, "\n\nEFER WRITE (old_val = %p) (new_val = %p)\n", (void *)efer->value, (void *)src.value);
+
+ v3_print_guest_state(core);
+ v3_print_vmcs();
+ efer->value = src.value;
+ return 0;
+}
#endif
-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);
-
- return (addr_t)V3_PAddr((void *)vmcs_page);
-}
-
+static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state) {
+ int vmx_ret = 0;
+ /* Get Available features */
+ struct vmx_pin_ctrls avail_pin_ctrls;
+ avail_pin_ctrls.value = v3_vmx_get_ctrl_features(&(hw_info.pin_ctrls));
+ /* ** */
-static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state) {
- int vmx_ret = 0;
+ // disable global interrupts for vm state initialization
+ v3_disable_ints();
- PrintDebug("Loading VMCS\n");
+ PrintDebug(core->vm_info, core, "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");
+ PrintError(core->vm_info, core, "VMPTRLD failed\n");
return -1;
}
+ /*** 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;
-
-
- __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
- );
+ /* Print Control MSRs */
+ V3_Print(core->vm_info, core, "CR0 MSR: req_val=%p, req_mask=%p\n", (void *)(addr_t)hw_info.cr0.req_val, (void *)(addr_t)hw_info.cr0.req_mask);
+ V3_Print(core->vm_info, core, "CR4 MSR: req_val=%p, req_mask=%p\n", (void *)(addr_t)hw_info.cr4.req_val, (void *)(addr_t)hw_info.cr4.req_mask);
- 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.virt_nmi = 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;
+
+ /* We enable the preemption timer by default to measure accurate guest time */
+ if (avail_pin_ctrls.active_preempt_timer) {
+ V3_Print(core->vm_info, core, "VMX Preemption Timer is available\n");
+ vmx_state->pin_ctrls.active_preempt_timer = 1;
+ vmx_state->exit_ctrls.save_preempt_timer = 1;
+ }
+
+ // we want it to use this when halting
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;
+
+ // cpuid tells it that it does not have these instructions
+ vmx_state->pri_proc_ctrls.monitor_exit = 1;
+ vmx_state->pri_proc_ctrls.mwait_exit = 1;
+
+ // we don't need to handle a pause, although this is where
+ // we could pull out of a spin lock acquire or schedule to find its partner
+ 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_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));
- 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;
+#ifdef __V3_64BIT__
+ // Ensure host runs in 64-bit mode at each VM EXIT
vmx_state->exit_ctrls.host_64_on = 1;
+#endif
- if ((vmx_state->exit_ctrls.save_efer == 1) || (vmx_state->exit_ctrls.ld_efer == 1)) {
- vmx_state->ia32e_avail = 1;
- }
- 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 ***********/
+ // Restore host's EFER register on each VM EXIT
+ vmx_state->exit_ctrls.ld_efer = 1;
- info->rip = 0xd0000;
- info->vm_regs.rsp = 0x80000;
+ // 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;
- struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags);
- flags->rsvd1 = 1;
+ vmx_state->exit_ctrls.save_pat = 1;
+ vmx_state->exit_ctrls.ld_pat = 1;
+ vmx_state->entry_ctrls.ld_pat = 1;
- /* Print Control MSRs */
- v3_get_msr(VMX_CR0_FIXED0_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
- PrintDebug("CR0 MSR: %p\n", (void *)(addr_t)tmp_msr.value);
+ /* Temporary GPF trap */
+ // vmx_state->excp_bmap.gp = 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);
+ // Setup Guests initial PAT field
+ vmx_ret |= check_vmcs_write(VMCS_GUEST_PAT, 0x0007040600070406LL);
+ // Capture CR8 mods so that we can keep the apic_tpr correct
+ vmx_state->pri_proc_ctrls.cr8_ld_exit = 1;
+ vmx_state->pri_proc_ctrls.cr8_str_exit = 1;
-#define GUEST_CR0 0x80000031
-#define GUEST_CR4 0x00002000
- info->ctrl_regs.cr0 = GUEST_CR0;
- info->ctrl_regs.cr4 = GUEST_CR4;
- ((struct cr0_32 *)&(info->shdw_pg_state.guest_cr0))->pe = 1;
-
/* Setup paging */
- if (info->shdw_pg_mode == SHADOW_PAGING) {
- PrintDebug("Creating initial shadow page table\n");
+ if (core->shdw_pg_mode == SHADOW_PAGING) {
+ PrintDebug(core->vm_info, core, "Creating initial shadow page table\n");
- if (v3_init_passthrough_pts(info) == -1) {
- PrintError("Could not initialize passthrough page tables\n");
+ if (v3_init_passthrough_pts(core) == -1) {
+ PrintError(core->vm_info, core, "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
+#define CR0_NE 0x00000020
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP | CR0_NE));
- vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG) );
- vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE);
+ // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE );
- info->ctrl_regs.cr3 = info->direct_map_pt;
+ v3_activate_passthrough_pt(core);
// 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;
- }
- // Setup segment registers
- {
- struct v3_segment * seg_reg = (struct v3_segment *)&(info->segments);
+ // Note that we intercept cr4.pae writes
+ // and we have cr4 read-shadowed to the shadow pager's cr4
+
+ vmx_state->pri_proc_ctrls.invlpg_exit = 1;
+
+ /* Add page fault exits */
+ vmx_state->excp_bmap.pf = 1;
- int i;
+ // Setup VMX Assist
+ v3_vmxassist_init(core, vmx_state);
- for (i = 0; i < 10; i++) {
- seg_reg[i].selector = 3 << 3;
- seg_reg[i].limit = 0xffff;
- seg_reg[i].base = 0x0;
+ // Hook all accesses to EFER register
+ v3_hook_msr(core->vm_info, EFER_MSR,
+ &v3_handle_efer_read,
+ &v3_handle_efer_write,
+ core);
+
+ } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
+ (v3_mach_type == V3_VMX_EPT_CPU)) {
+
+#define CR0_PE 0x00000001
+#define CR0_PG 0x80000000
+#define CR0_WP 0x00010000 // To ensure mem hooks work
+#define CR0_NE 0x00000020
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP | CR0_NE));
+
+ // vmx_state->pinbased_ctrls |= NMI_EXIT;
+
+ // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE);
+
+ /* 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
+
+
+
+ if (v3_init_nested_paging_core(core, &hw_info) == -1) {
+ PrintError(core->vm_info, core, "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;
+ // Hook all accesses to EFER register
+ v3_hook_msr(core->vm_info, EFER_MSR, NULL, NULL, NULL);
+
+ } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
+ (v3_mach_type == 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 = 0x60010030;
+ core->ctrl_regs.cr4 = 0x00002010; // Enable VMX and PSE flag
+
+
+ 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;
+
+ }
+
+
+ core->segments.gdtr.limit = 0x0000ffff;
+ core->segments.gdtr.base = 0x0000000000000000LL;
+
+ 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 = 0x2;
+ 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;
+
+
+ // Cause VM_EXIT whenever the CR4.VMXE bit is set
+ vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE);
+#define CR0_NE 0x00000020
+#define CR0_CD 0x40000000
+ vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, CR0_NE | CR0_CD);
+ ((struct cr0_32 *)&(core->shdw_pg_state.guest_cr0))->ne = 1;
+ ((struct cr0_32 *)&(core->shdw_pg_state.guest_cr0))->cd = 0;
+
+ if (v3_init_nested_paging_core(core, &hw_info) == -1) {
+ PrintError(core->vm_info, core, "Error initializing EPT\n");
+ return -1;
}
- info->segments.cs.type = 0xb;
+ // Hook all accesses to EFER register
+ // v3_hook_msr(core->vm_info, EFER_MSR, &debug_efer_read, &debug_efer_write, core);
+ v3_hook_msr(core->vm_info, EFER_MSR, NULL, NULL, NULL);
+ } else {
+ PrintError(core->vm_info, core, "Invalid Virtual paging mode (pg_mode=%d) (mach_type=%d)\n", core->shdw_pg_mode, v3_mach_type);
+ return -1;
+ }
+
- 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;
+ // hook vmx msrs
+ // Setup SYSCALL/SYSENTER MSRs in load/store area
- /************* 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");
+ // save STAR, LSTAR, FMASK, KERNEL_GS_BASE MSRs in MSR load/store area
+ {
+
+ struct vmcs_msr_save_area * msr_entries = NULL;
+ int max_msrs = (hw_info.misc_info.max_msr_cache_size + 1) * 4;
+ int msr_ret = 0;
+
+ V3_Print(core->vm_info, core, "Setting up MSR load/store areas (max_msr_count=%d)\n", max_msrs);
+
+ if (max_msrs < 4) {
+ PrintError(core->vm_info, core, "Max MSR cache size is too small (%d)\n", max_msrs);
return -1;
}
- memcpy((void *)vmxassist_gdt, gdt, sizeof(uint64_t) * 5);
-
- info->segments.gdtr.base = VMXASSIST_GDT;
+ vmx_state->msr_area_paddr = (addr_t)V3_AllocPages(1); // need not be shadow-safe, not exposed to guest
+
+ if (vmx_state->msr_area_paddr == (addr_t)NULL) {
+ PrintError(core->vm_info, core, "could not allocate msr load/store area\n");
+ return -1;
+ }
-#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);
+ msr_entries = (struct vmcs_msr_save_area *)V3_VAddr((void *)(vmx_state->msr_area_paddr));
+ vmx_state->msr_area = msr_entries; // cache in vmx_info
- info->segments.tr.selector = 0x08;
- info->segments.tr.base = vmxassist_tss;
+ memset(msr_entries, 0, PAGE_SIZE);
- //info->segments.tr.type = 0x9;
- info->segments.tr.type = 0x3;
- info->segments.tr.system = 0;
- info->segments.tr.present = 1;
- info->segments.tr.granularity = 0;
- }
-
- // setup VMXASSIST
- {
-#define VMXASSIST_START 0x000d0000
- extern uint8_t v3_vmxassist_start[];
- extern uint8_t v3_vmxassist_end[];
- addr_t vmxassist_dst = 0;
-
- if (v3_gpa_to_hva(info, VMXASSIST_START, &vmxassist_dst) == -1) {
- PrintError("Could not find VMXASSIST destination\n");
+ msr_entries->guest_star.index = IA32_STAR_MSR;
+ msr_entries->guest_lstar.index = IA32_LSTAR_MSR;
+ msr_entries->guest_fmask.index = IA32_FMASK_MSR;
+ msr_entries->guest_kern_gs.index = IA32_KERN_GS_BASE_MSR;
+
+ msr_entries->host_star.index = IA32_STAR_MSR;
+ msr_entries->host_lstar.index = IA32_LSTAR_MSR;
+ msr_entries->host_fmask.index = IA32_FMASK_MSR;
+ msr_entries->host_kern_gs.index = IA32_KERN_GS_BASE_MSR;
+
+ 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);
+
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_STORE_ADDR, (addr_t)V3_PAddr(msr_entries->guest_msrs));
+ msr_ret |= check_vmcs_write(VMCS_ENTRY_MSR_LOAD_ADDR, (addr_t)V3_PAddr(msr_entries->guest_msrs));
+ msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_LOAD_ADDR, (addr_t)V3_PAddr(msr_entries->host_msrs));
+
+
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_STAR_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_LSTAR_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_FMASK_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_KERN_GS_BASE_MSR, NULL, NULL, NULL);
+
+
+ // IMPORTANT: These MSRs appear to be cached by the hardware....
+ msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_CS_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_ESP_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_EIP_MSR, NULL, NULL, NULL);
+
+ msr_ret |= v3_hook_msr(core->vm_info, FS_BASE_MSR, NULL, NULL, NULL);
+ msr_ret |= v3_hook_msr(core->vm_info, GS_BASE_MSR, NULL, NULL, NULL);
+
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_PAT_MSR, NULL, NULL, NULL);
+
+ // Not sure what to do about this... Does not appear to be an explicit hardware cache version...
+ msr_ret |= v3_hook_msr(core->vm_info, IA32_CSTAR_MSR, NULL, NULL, NULL);
+
+ if (msr_ret != 0) {
+ PrintError(core->vm_info, core, "Error configuring MSR save/restore area\n");
return -1;
}
- memcpy((void *)vmxassist_dst, v3_vmxassist_start, v3_vmxassist_end - v3_vmxassist_start);
+
}
- /*** 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);
-
+#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
+
+
- if (v3_update_vmcs_ctrl_fields(info)) {
- PrintError("Could not write control fields!\n");
+
+
+ if (v3_update_vmcs_ctrl_fields(core)) {
+ PrintError(core->vm_info, core, "Could not write control fields!\n");
return -1;
}
- if (v3_update_vmcs_host_state(info)) {
- PrintError("Could not write host state\n");
+ /*
+ if (v3_update_vmcs_host_state(core)) {
+ PrintError(core->vm_info, core, "Could not write host state\n");
return -1;
}
+ */
-
- vmx_state->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_enable_ints();
return 0;
}
-int v3_init_vmx_vmcs(struct guest_info * info, v3_vm_class_t vm_class) {
+
+static void __init_vmx_vmcs(void * arg) {
+ struct guest_info * core = arg;
struct vmx_data * vmx_state = NULL;
int vmx_ret = 0;
vmx_state = (struct vmx_data *)V3_Malloc(sizeof(struct vmx_data));
- PrintDebug("vmx_data pointer: %p\n", (void *)vmx_state);
+ if (!vmx_state) {
+ PrintError(core->vm_info, core, "Unable to allocate in initializing vmx vmcs\n");
+ return;
+ }
+
+ memset(vmx_state, 0, sizeof(struct vmx_data));
+
+ PrintDebug(core->vm_info, core, "vmx_data pointer: %p\n", (void *)vmx_state);
- PrintDebug("Allocating VMCS\n");
+ PrintDebug(core->vm_info, core, "Allocating VMCS\n");
vmx_state->vmcs_ptr_phys = allocate_vmcs();
- PrintDebug("VMCS pointer: %p\n", (void *)(vmx_state->vmcs_ptr_phys));
+ PrintDebug(core->vm_info, core, "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(core->vm_info, core, "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);
+ PrintDebug(core->vm_info, core, "Clearing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys);
vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys);
if (vmx_ret != VMX_SUCCESS) {
- PrintError("VMCLEAR failed\n");
- return -1;
+ PrintError(core->vm_info, core, "VMCLEAR failed\n");
+ return;
}
- if (vm_class == V3_PC_VM) {
- PrintDebug("Initializing VMCS\n");
- init_vmcs_bios(info, vmx_state);
+ if (core->vm_info->vm_class == V3_PC_VM) {
+ PrintDebug(core->vm_info, core, "Initializing VMCS\n");
+ if (init_vmcs_bios(core, vmx_state) == -1) {
+ PrintError(core->vm_info, core, "Error initializing VMCS to BIOS state\n");
+ return;
+ }
} else {
- PrintError("Invalid VM Class\n");
+ PrintError(core->vm_info, core, "Invalid VM Class\n");
+ return;
+ }
+
+ PrintDebug(core->vm_info, core, "Serializing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys);
+ vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys);
+
+ core->core_run_state = CORE_STOPPED;
+ return;
+}
+
+
+
+int v3_init_vmx_vmcs(struct guest_info * core, v3_vm_class_t vm_class) {
+ extern v3_cpu_arch_t v3_cpu_types[];
+
+ if (v3_cpu_types[V3_Get_CPU()] == V3_INVALID_CPU) {
+ int i = 0;
+
+ for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) {
+ if (v3_cpu_types[i] != V3_INVALID_CPU) {
+ break;
+ }
+ }
+
+ if (i == V3_CONFIG_MAX_CPUS) {
+ PrintError(core->vm_info, core, "Could not find VALID CPU for VMX guest initialization\n");
+ return -1;
+ }
+
+ V3_Call_On_CPU(i, __init_vmx_vmcs, core);
+
+ } else {
+ __init_vmx_vmcs(core);
+ }
+
+ if (core->core_run_state != CORE_STOPPED) {
+ PrintError(core->vm_info, core, "Error initializing VMX Core\n");
return -1;
}
return 0;
}
+
+int v3_deinit_vmx_vmcs(struct guest_info * core) {
+ 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);
+
+ return 0;
+}
+
+
+
+#ifdef V3_CONFIG_CHECKPOINT
+/*
+ * JRL: This is broken
+ */
+int v3_vmx_save_core(struct guest_info * core, void * ctx){
+ struct vmx_data * vmx_info = (struct vmx_data *)(core->vmm_data);
+
+ // note that the vmcs pointer is an HPA, but we need an HVA
+ if (v3_chkpt_save(ctx, "vmcs_data", PAGE_SIZE_4KB,
+ V3_VAddr((void*) (vmx_info->vmcs_ptr_phys)))) {
+ PrintError(core->vm_info, core, "Could not save vmcs data for VMX\n");
+ return -1;
+ }
+
+ 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;
+ addr_t vmcs_page_paddr; //HPA
+
+ vmcs_page_paddr = (addr_t) V3_AllocPages(1); // need not be shadow-safe, not exposed to guest
+
+ if (!vmcs_page_paddr) {
+ PrintError(core->vm_info, core, "Could not allocate space for a vmcs in VMX\n");
+ return -1;
+ }
+
+ if (v3_chkpt_load(ctx, "vmcs_data", PAGE_SIZE_4KB,
+ V3_VAddr((void *)vmcs_page_paddr)) == -1) {
+ PrintError(core->vm_info, core, "Could not load vmcs data for VMX\n");
+ V3_FreePages((void*)vmcs_page_paddr,1);
+ return -1;
+ }
+
+ vmcs_clear(vmx_info->vmcs_ptr_phys);
+
+ // Probably need to delete the old one...
+ V3_FreePages((void*)(vmx_info->vmcs_ptr_phys),1);
+
+ vmcs_load(vmcs_page_paddr);
+
+ 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(core->vm_info, core, "Failed to activate shadow page tables\n");
+ return -1;
+ }
+ } else {
+ if (v3_activate_passthrough_pt(core) == -1) {
+ PrintError(core->vm_info, core, "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(info->vm_info, info, "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(info->vm_info, info, "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(info->vm_info, info, "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(info->vm_info, info, "IRQ pending from previous injection\n");
#endif
// Copy the IDT vectoring info over to reinject the old interrupt
switch (v3_intr_pending(info)) {
case V3_EXTERNAL_IRQ: {
- info->intr_core_state.irq_vector = v3_get_intr(info);
+
+ int irq = v3_get_intr(info);
+
+ if (irq<0) {
+ break;
+ }
+
+ info->intr_core_state.irq_vector = irq;
ent_int.vector = info->intr_core_state.irq_vector;
ent_int.type = 0;
ent_int.error_code = 0;
ent_int.valid = 1;
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Injecting Interrupt %d at exit %u(EIP=%p)\n",
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print(info->vm_info, info, "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);
break;
}
case V3_NMI:
- PrintDebug("Injecting NMI\n");
+ PrintDebug(info->vm_info, info, "Injecting NMI\n");
ent_int.type = 2;
ent_int.vector = 2;
break;
case V3_SOFTWARE_INTR:
- PrintDebug("Injecting software interrupt\n");
+ PrintDebug(info->vm_info, info, "Injecting software interrupt\n");
ent_int.type = 4;
ent_int.valid = 1;
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(info->vm_info, info, "Enabling Interrupt-Window exiting: %d\n", instr_len);
#endif
vmx_info->pri_proc_ctrls.int_wndw_exit = 1;
static struct vmx_exit_info exit_log[10];
+static uint64_t rip_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);
+ V3_Print(info->vm_info, info, "\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);
+ V3_Print(info->vm_info, info, "%d:\texit_reason = %p\n", i, (void *)(addr_t)tmp->exit_reason);
+ V3_Print(info->vm_info, info, "\texit_qual = %p\n", (void *)tmp->exit_qual);
+ V3_Print(info->vm_info, info, "\tint_info = %p\n", (void *)(addr_t)tmp->int_info);
+ V3_Print(info->vm_info, info, "\tint_err = %p\n", (void *)(addr_t)tmp->int_err);
+ V3_Print(info->vm_info, info, "\tinstr_info = %p\n", (void *)(addr_t)tmp->instr_info);
+ V3_Print(info->vm_info, info, "\tguest_linear_addr= %p\n", (void *)(addr_t)tmp->guest_linear_addr);
+ V3_Print(info->vm_info, info, "\tRIP = %p\n", (void *)rip_log[cnt]);
+
cnt--;
}
+int
+v3_vmx_config_tsc_virtualization(struct guest_info * info) {
+ struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
+
+ if (info->time_state.flags & VM_TIME_TRAP_RDTSC) {
+ if (!vmx_info->pri_proc_ctrls.rdtsc_exit) {
+ vmx_info->pri_proc_ctrls.rdtsc_exit = 1;
+ check_vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
+ }
+ } else {
+ sint64_t tsc_offset;
+ uint32_t tsc_offset_low, tsc_offset_high;
+
+ if (vmx_info->pri_proc_ctrls.rdtsc_exit) {
+ vmx_info->pri_proc_ctrls.rdtsc_exit = 0;
+ check_vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
+ }
+
+ if (info->time_state.flags & VM_TIME_TSC_PASSTHROUGH) {
+ tsc_offset = 0;
+ } else {
+ tsc_offset = v3_tsc_host_offset(&info->time_state);
+ }
+ tsc_offset_high = (uint32_t)(( tsc_offset >> 32) & 0xffffffff);
+ tsc_offset_low = (uint32_t)(tsc_offset & 0xffffffff);
+
+ check_vmcs_write(VMCS_TSC_OFFSET_HIGH, tsc_offset_high);
+ check_vmcs_write(VMCS_TSC_OFFSET, tsc_offset_low);
+ }
+ return 0;
+}
+
/*
* CAUTION and DANGER!!!
*
*/
int v3_vmx_enter(struct guest_info * info) {
int ret = 0;
- 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);
+ uint64_t guest_cycles = 0;
// Conditionally yield the CPU if the timeslice has expired
- v3_yield_cond(info);
+ v3_schedule(info);
+
+#ifdef V3_CONFIG_MEM_TRACK
+ v3_mem_track_entry(info);
+#endif
- // v3_print_guest_state(info);
+ // Update timer devices late after being in the VM so that as much
+ // of the 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.
+ v3_advance_time(info, NULL);
+ v3_update_timers(info);
// disable global interrupts for vm state transition
v3_disable_ints();
+ 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);
}
vmcs_write(VMCS_GUEST_CR3, guest_cr3);
}
- v3_update_timers(info);
- /* If this guest is frequency-lagged behind host time, wait
- * for the appropriate host time before resuming the guest. */
- v3_adjust_time(info);
+ // Perform last-minute time setup prior to entering the VM
+ v3_vmx_config_tsc_virtualization(info);
- 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);
+ if (v3_update_vmcs_host_state(info)) {
+ v3_enable_ints();
+ PrintError(info->vm_info, info, "Could not write host state\n");
+ return -1;
+ }
+
+ if (vmx_info->pin_ctrls.active_preempt_timer) {
+ /* Preemption timer is active */
+ uint32_t preempt_window = 0xffffffff;
- if (info->vm_info->run_state == VM_STOPPED) {
- 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));
+ if (info->timeouts.timeout_active) {
+ preempt_window = info->timeouts.next_timeout;
+ }
+
+ check_vmcs_write(VMCS_PREEMPT_TIMER, preempt_window);
+ }
+
+ V3_FP_ENTRY_RESTORE(info);
+
+ {
+ uint64_t entry_tsc = 0;
+ uint64_t exit_tsc = 0;
+
+#ifdef V3_CONFIG_PWRSTAT_TELEMETRY
+ v3_pwrstat_telemetry_enter(info);
+#endif
+
+#ifdef V3_CONFIG_PMU_TELEMETRY
+ v3_pmu_telemetry_enter(info);
+#endif
+
+ if (vmx_info->state == VMX_UNLAUNCHED) {
+ vmx_info->state = VMX_LAUNCHED;
+ rdtscll(entry_tsc);
+ ret = v3_vmx_launch(&(info->vm_regs), info, &(info->ctrl_regs));
+ rdtscll(exit_tsc);
+
+ } else {
+ V3_ASSERT(info->vm_info, info,vmx_info->state != VMX_UNLAUNCHED);
+ rdtscll(entry_tsc);
+ ret = v3_vmx_resume(&(info->vm_regs), info, &(info->ctrl_regs));
+ rdtscll(exit_tsc);
+ }
+
+ guest_cycles = exit_tsc - entry_tsc;
+
+#ifdef V3_CONFIG_PMU_TELEMETRY
+ v3_pmu_telemetry_exit(info);
+#endif
+
+#ifdef V3_CONFIG_PWRSTAT_TELEMETRY
+ v3_pwrstat_telemetry_exit(info);
+#endif
}
- // PrintDebug("VMX Exit: ret=%d\n", ret);
+ // PrintDebug(info->vm_info, info, "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(info->vm_info, info, "VMENTRY Error: %d (launch_ret = %d)\n", error, ret);
return -1;
}
+
info->num_exits++;
+ V3_FP_EXIT_SAVE(info);
+
+ /* If we have the preemption time, then use it to get more accurate guest time */
+ if (vmx_info->pin_ctrls.active_preempt_timer) {
+ uint32_t cycles_left = 0;
+ check_vmcs_read(VMCS_PREEMPT_TIMER, &(cycles_left));
+
+ if (info->timeouts.timeout_active) {
+ guest_cycles = info->timeouts.next_timeout - cycles_left;
+ } else {
+ guest_cycles = 0xffffffff - cycles_left;
+ }
+ }
+
+ // Immediate exit from VM time bookkeeping
+ v3_advance_time(info, &guest_cycles);
+
/* Update guest state */
v3_vmx_save_vmcs(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_INT_ERR, &(exit_info.int_err));
check_vmcs_read(VMCS_GUEST_LINEAR_ADDR, &(exit_info.guest_linear_addr));
- //PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_info.exit_reason, exit_info.exit_qual);
+ if (info->shdw_pg_mode == NESTED_PAGING) {
+ check_vmcs_read(VMCS_GUEST_PHYS_ADDR, &(exit_info.ept_fault_addr));
+ }
- exit_log[info->num_exits % 10] = exit_info;
+ //PrintDebug(info->vm_info, info, "VMX Exit taken, id-qual: %u-%lu\n", exit_info.exit_reason, exit_info.exit_qual);
+ exit_log[info->num_exits % 10] = exit_info;
+ rip_log[info->num_exits % 10] = get_addr_linear(info, info->rip, &(info->segments.cs));
-#ifdef CONFIG_SYMCALL
+#ifdef V3_CONFIG_SYMCALL
if (info->sym_core_state.symcall_state.sym_call_active == 0) {
update_irq_exit_state(info);
}
update_irq_exit_state(info);
#endif
+ if (exit_info.exit_reason == VMX_EXIT_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);
+
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ V3_Print(info->vm_info, info, "Interrupts available again! (RIP=%llx)\n", info->rip);
+#endif
+ }
+
+
+ // Lastly we check for an NMI exit, and reinject if so
+ {
+ struct vmx_basic_exit_info * basic_info = (struct vmx_basic_exit_info *)&(exit_info.exit_reason);
+
+ if (basic_info->reason == VMX_EXIT_INFO_EXCEPTION_OR_NMI) {
+ if ((uint8_t)exit_info.int_info == 2) {
+ asm("int $2");
+ }
+ }
+ }
+
// reenable global interrupts after vm exit
v3_enable_ints();
// Conditionally yield the CPU if the timeslice has expired
- v3_yield_cond(info);
+ v3_schedule(info);
+ v3_advance_time(info, NULL);
+ v3_update_timers(info);
if (v3_handle_vmx_exit(info, &exit_info) == -1) {
- PrintError("Error in VMX exit handler\n");
+ PrintError(info->vm_info, info, "Error in VMX exit handler (Exit reason=%x)\n", exit_info.exit_reason);
return -1;
}
- return 0;
-}
-
-
-int v3_start_vmx_guest(struct guest_info* info) {
-
- PrintDebug("Starting VMX core %u\n",info->cpu_id);
- if (info->cpu_mode==INIT) {
- PrintDebug("VMX core %u: I am an AP in INIT mode, waiting for that to change\n",info->cpu_id);
- while (info->cpu_mode==INIT) {
- v3_yield(info);
- //PrintDebug("VMX core %u: still waiting for INIT\n",info->cpu_id);
- }
- PrintDebug("VMX core %u: I am out of INIT\n",info->cpu_id);
- if (info->cpu_mode==SIPI) {
- PrintDebug("VMX core %u: I am waiting on a SIPI to set my starting address\n",info->cpu_id);
- while (info->cpu_mode==SIPI) {
- v3_yield(info);
- //PrintDebug("VMX core %u: still waiting for SIPI\n",info->cpu_id);
- }
- }
- PrintDebug("VMX core %u: I have my SIPI\n", info->cpu_id);
- }
-
- if (info->cpu_mode!=REAL) {
- PrintError("VMX core %u: I am not in REAL mode at launch! Huh?!\n", info->cpu_id);
- return -1;
+ if (info->timeouts.timeout_active) {
+ /* Check to see if any timeouts have expired */
+ v3_handle_timeouts(info, guest_cycles);
}
- 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->segments.cs.limit,(void*)(info->rip));
+#ifdef V3_CONFIG_MEM_TRACK
+ v3_mem_track_exit(info);
+#endif
+ return 0;
+}
- PrintDebug("VMX core %u: Launching VMX VM\n", info->cpu_id);
+int v3_start_vmx_guest(struct guest_info * info) {
- v3_start_time(info);
+ PrintDebug(info->vm_info, info, "Starting VMX core %u\n", info->vcpu_id);
+#if V3_CONFIG_HVM
+ if (v3_setup_hvm_vm_for_boot(vm)) {
+ PrintError(vm, VCORE_NONE, "HVM setup for boot failed\n");
+ return -1;
+ }
+#endif
+
while (1) {
+ if (info->core_run_state == CORE_STOPPED) {
+ if (info->vcpu_id == 0) {
+ info->core_run_state = CORE_RUNNING;
+ } else {
+
+ PrintDebug(info->vm_info, info, "VMX core %u: Waiting for core initialization\n", info->vcpu_id);
+
+ V3_NO_WORK(info);
+
+ while (info->core_run_state == CORE_STOPPED) {
+
+ if (info->vm_info->run_state == VM_STOPPED) {
+ // The VM was stopped before this core was initialized.
+ return 0;
+ }
+
+ V3_STILL_NO_WORK(info);
+ //PrintDebug(info->vm_info, info, "VMX core %u: still waiting for INIT\n",info->vcpu_id);
+ }
+
+ V3_HAVE_WORK_AGAIN(info);
+
+ PrintDebug(info->vm_info, info, "VMX core %u initialized\n", info->vcpu_id);
+
+ // We'll be paranoid about race conditions here
+ v3_wait_at_barrier(info);
+ }
+
+
+ PrintDebug(info->vm_info, info, "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(info->vm_info, info, "VMX core %u: Launching VMX VM on logical core %u\n", info->vcpu_id, info->pcpu_id);
+
+ v3_start_time(info);
+
+
+ if (info->vm_info->run_state == VM_STOPPED) {
+ info->core_run_state = CORE_STOPPED;
+ break;
+ }
+ }
+
+
+#ifdef V3_CONFIG_PMU_TELEMETRY
+ v3_pmu_telemetry_start(info);
+#endif
+
+#ifdef V3_CONFIG_PWRSTAT_TELEMETRY
+ v3_pwrstat_telemetry_start(info);
+#endif
+
+
if (v3_vmx_enter(info) == -1) {
+
+ addr_t host_addr;
+ addr_t linear_addr = 0;
+
+ info->vm_info->run_state = VM_ERROR;
+
+ V3_Print(info->vm_info, info, "VMX core %u: VMX ERROR!!\n", info->vcpu_id);
+
+ v3_print_guest_state(info);
+
+ V3_Print(info->vm_info, info, "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(info->vm_info, info, "VMX core %u: Host Address of rip = 0x%p\n", info->vcpu_id, (void *)host_addr);
+
+ V3_Print(info->vm_info, info, "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);
+ V3_Print(info->vm_info, info, "VMX Exit number %d\n", (uint32_t)info->num_exits);
}
*/
}
+#ifdef V3_CONFIG_PMU_TELEMETRY
+ v3_pmu_telemetry_end(info);
+#endif
+
+#ifdef V3_CONFIG_PWRSTAT_TELEMETRY
+ v3_pwrstat_telemetry_end(info);
+#endif
+
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;
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
v3_cpuid(0x1, &eax, &ebx, &ecx, &edx);
- PrintDebug("ECX: 0x%x\n", ecx);
+ PrintDebug(VM_NONE, VCORE_NONE, "ECX: 0x%x\n", ecx);
if (ecx & CPUID_1_ECX_VTXFLAG) {
v3_get_msr(VMX_FEATURE_CONTROL_MSR, &(feature_msr.hi), &(feature_msr.lo));
- PrintDebug("MSRREGlow: 0x%.8x\n", feature_msr.lo);
+ PrintDebug(VM_NONE, VCORE_NONE, "MSRREGlow: 0x%.8x\n", feature_msr.lo);
- if ((feature_msr.lo & FEATURE_CONTROL_VALID) != FEATURE_CONTROL_VALID) {
- PrintDebug("VMX is locked -- enable in the BIOS\n");
+ if ((feature_msr.lo & CPUID_VMX_FEATURES) != CPUID_VMX_FEATURES) {
+ PrintDebug(VM_NONE, VCORE_NONE, "VMX is locked -- enable in the BIOS\n");
return 0;
}
} else {
- PrintDebug("VMX not supported on this cpu\n");
+ PrintDebug(VM_NONE, VCORE_NONE, "VMX not supported on this cpu\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_mach_type == 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) {
+ addr_t vmx_on_region = 0;
+ extern v3_cpu_arch_t v3_mach_type;
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));
-#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 (v3_mach_type == V3_INVALID_CPU) {
+ if (v3_init_vmx_hw(&hw_info) == -1) {
+ PrintError(VM_NONE, VCORE_NONE, "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(VM_NONE, VCORE_NONE, "VMX Enabled\n");
+ host_vmcs_ptrs[cpu_id] = vmx_on_region;
} else {
- PrintError("VMX initialization failure\n");
- return;
+ V3_Print(VM_NONE, VCORE_NONE, "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(VM_NONE, VCORE_NONE, "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(VM_NONE, VCORE_NONE, "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(VM_NONE, VCORE_NONE, "VMX EPT (Nested) Paging supported\n");
+ v3_cpu_types[cpu_id] = V3_VMX_EPT_CPU;
+ } else {
+ V3_Print(VM_NONE, VCORE_NONE, "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;
+
+ if (host_vmcs_ptrs[cpu_id] != 0) {
+ V3_Print(VM_NONE, VCORE_NONE, "Disabling VMX\n");
+
+ if (vmx_off() != VMX_SUCCESS) {
+ PrintError(VM_NONE, VCORE_NONE, "Error executing VMXOFF\n");
+ }
+
+ V3_FreePages((void *)host_vmcs_ptrs[cpu_id], 1);
+
+ host_vmcs_ptrs[cpu_id] = 0;
+ }
+}
