2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #include <palacios/svm.h>
22 #include <palacios/vmm.h>
24 #include <palacios/vmcb.h>
25 #include <palacios/vmm_mem.h>
26 #include <palacios/vmm_paging.h>
27 #include <palacios/svm_handler.h>
29 #include <palacios/vmm_debug.h>
30 #include <palacios/vm_guest_mem.h>
32 #include <palacios/vmm_decoder.h>
33 #include <palacios/vmm_string.h>
34 #include <palacios/vmm_lowlevel.h>
35 #include <palacios/svm_msr.h>
37 #include <palacios/vmm_rbtree.h>
39 #include <palacios/vmm_direct_paging.h>
41 #include <palacios/vmm_ctrl_regs.h>
42 #include <palacios/svm_io.h>
44 #include <palacios/vmm_sprintf.h>
47 uint32_t v3_last_exit;
49 // This is a global pointer to the host's VMCB
50 static addr_t host_vmcbs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
54 extern void v3_stgi();
55 extern void v3_clgi();
56 //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs);
57 extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb);
60 static vmcb_t * Allocate_VMCB() {
61 vmcb_t * vmcb_page = (vmcb_t *)V3_VAddr(V3_AllocPages(1));
63 memset(vmcb_page, 0, 4096);
70 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * vm_info) {
71 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
72 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
79 ctrl_area->svm_instrs.VMRUN = 1;
80 ctrl_area->svm_instrs.VMMCALL = 1;
81 ctrl_area->svm_instrs.VMLOAD = 1;
82 ctrl_area->svm_instrs.VMSAVE = 1;
83 ctrl_area->svm_instrs.STGI = 1;
84 ctrl_area->svm_instrs.CLGI = 1;
85 ctrl_area->svm_instrs.SKINIT = 1;
86 ctrl_area->svm_instrs.RDTSCP = 1;
87 ctrl_area->svm_instrs.ICEBP = 1;
88 ctrl_area->svm_instrs.WBINVD = 1;
89 ctrl_area->svm_instrs.MONITOR = 1;
90 ctrl_area->svm_instrs.MWAIT_always = 1;
91 ctrl_area->svm_instrs.MWAIT_if_armed = 1;
92 ctrl_area->instrs.INVLPGA = 1;
93 ctrl_area->instrs.CPUID = 1;
95 ctrl_area->instrs.HLT = 1;
96 // guest_state->cr0 = 0x00000001; // PE
99 ctrl_area->exceptions.de = 1;
100 ctrl_area->exceptions.df = 1;
102 ctrl_area->exceptions.ts = 1;
103 ctrl_area->exceptions.ss = 1;
104 ctrl_area->exceptions.ac = 1;
105 ctrl_area->exceptions.mc = 1;
106 ctrl_area->exceptions.gp = 1;
107 ctrl_area->exceptions.ud = 1;
108 ctrl_area->exceptions.np = 1;
109 ctrl_area->exceptions.of = 1;
111 ctrl_area->exceptions.nmi = 1;
115 ctrl_area->instrs.NMI = 1;
116 ctrl_area->instrs.SMI = 1;
117 ctrl_area->instrs.INIT = 1;
118 ctrl_area->instrs.PAUSE = 1;
119 ctrl_area->instrs.shutdown_evts = 1;
122 /* DEBUG FOR RETURN CODE */
123 ctrl_area->exit_code = 1;
126 /* Setup Guest Machine state */
128 vm_info->vm_regs.rsp = 0x00;
129 vm_info->rip = 0xfff0;
131 vm_info->vm_regs.rdx = 0x00000f00;
136 vm_info->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
137 vm_info->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
138 vm_info->ctrl_regs.efer |= EFER_MSR_svm_enable;
144 vm_info->segments.cs.selector = 0xf000;
145 vm_info->segments.cs.limit = 0xffff;
146 vm_info->segments.cs.base = 0x0000000f0000LL;
148 // (raw attributes = 0xf3)
149 vm_info->segments.cs.type = 0x3;
150 vm_info->segments.cs.system = 0x1;
151 vm_info->segments.cs.dpl = 0x3;
152 vm_info->segments.cs.present = 1;
156 struct v3_segment * segregs [] = {&(vm_info->segments.ss), &(vm_info->segments.ds),
157 &(vm_info->segments.es), &(vm_info->segments.fs),
158 &(vm_info->segments.gs), NULL};
160 for ( i = 0; segregs[i] != NULL; i++) {
161 struct v3_segment * seg = segregs[i];
163 seg->selector = 0x0000;
164 // seg->base = seg->selector << 4;
165 seg->base = 0x00000000;
168 // (raw attributes = 0xf3)
175 vm_info->segments.gdtr.limit = 0x0000ffff;
176 vm_info->segments.gdtr.base = 0x0000000000000000LL;
177 vm_info->segments.idtr.limit = 0x0000ffff;
178 vm_info->segments.idtr.base = 0x0000000000000000LL;
180 vm_info->segments.ldtr.selector = 0x0000;
181 vm_info->segments.ldtr.limit = 0x0000ffff;
182 vm_info->segments.ldtr.base = 0x0000000000000000LL;
183 vm_info->segments.tr.selector = 0x0000;
184 vm_info->segments.tr.limit = 0x0000ffff;
185 vm_info->segments.tr.base = 0x0000000000000000LL;
188 vm_info->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
189 vm_info->dbg_regs.dr7 = 0x0000000000000400LL;
192 v3_init_svm_io_map(vm_info);
193 ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(vm_info->io_map.arch_data);
194 ctrl_area->instrs.IOIO_PROT = 1;
197 v3_init_svm_msr_map(vm_info);
198 ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(vm_info->msr_map.arch_data);
199 ctrl_area->instrs.MSR_PROT = 1;
202 PrintDebug("Exiting on interrupts\n");
203 ctrl_area->guest_ctrl.V_INTR_MASKING = 1;
204 ctrl_area->instrs.INTR = 1;
207 if (vm_info->shdw_pg_mode == SHADOW_PAGING) {
208 PrintDebug("Creating initial shadow page table\n");
210 /* JRL: This is a performance killer, and a simplistic solution */
211 /* We need to fix this */
212 ctrl_area->TLB_CONTROL = 1;
213 ctrl_area->guest_ASID = 1;
216 if (v3_init_passthrough_pts(vm_info) == -1) {
217 PrintError("Could not initialize passthrough page tables\n");
222 vm_info->shdw_pg_state.guest_cr0 = 0x0000000000000010LL;
223 PrintDebug("Created\n");
225 vm_info->ctrl_regs.cr0 |= 0x80000000;
226 vm_info->ctrl_regs.cr3 = vm_info->direct_map_pt;
228 ctrl_area->cr_reads.cr0 = 1;
229 ctrl_area->cr_writes.cr0 = 1;
230 //ctrl_area->cr_reads.cr4 = 1;
231 ctrl_area->cr_writes.cr4 = 1;
232 ctrl_area->cr_reads.cr3 = 1;
233 ctrl_area->cr_writes.cr3 = 1;
235 v3_hook_msr(vm_info, EFER_MSR,
236 &v3_handle_efer_read,
237 &v3_handle_efer_write,
240 ctrl_area->instrs.INVLPG = 1;
242 ctrl_area->exceptions.pf = 1;
244 guest_state->g_pat = 0x7040600070406ULL;
248 } else if (vm_info->shdw_pg_mode == NESTED_PAGING) {
249 // Flush the TLB on entries/exits
250 ctrl_area->TLB_CONTROL = 1;
251 ctrl_area->guest_ASID = 1;
253 // Enable Nested Paging
254 ctrl_area->NP_ENABLE = 1;
256 PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE));
258 // Set the Nested Page Table pointer
259 if (v3_init_passthrough_pts(vm_info) == -1) {
260 PrintError("Could not initialize Nested page tables\n");
264 ctrl_area->N_CR3 = vm_info->direct_map_pt;
266 guest_state->g_pat = 0x7040600070406ULL;
271 int v3_init_svm_vmcb(struct guest_info * info, v3_vm_class_t vm_class) {
273 PrintDebug("Allocating VMCB\n");
274 info->vmm_data = (void*)Allocate_VMCB();
276 if (vm_class == V3_PC_VM) {
277 PrintDebug("Initializing VMCB (addr=%p)\n", (void *)info->vmm_data);
278 Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), info);
280 PrintError("Invalid VM class\n");
289 static int update_irq_exit_state(struct guest_info * info) {
290 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
292 if ((info->intr_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) {
294 #ifdef CONFIG_DEBUG_INTERRUPTS
295 PrintDebug("INTAK cycle completed for irq %d\n", info->intr_state.irq_vector);
298 info->intr_state.irq_started = 1;
299 info->intr_state.irq_pending = 0;
301 v3_injecting_intr(info, info->intr_state.irq_vector, V3_EXTERNAL_IRQ);
304 if ((info->intr_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) {
305 #ifdef CONFIG_DEBUG_INTERRUPTS
306 PrintDebug("Interrupt %d taken by guest\n", info->intr_state.irq_vector);
309 // Interrupt was taken fully vectored
310 info->intr_state.irq_started = 0;
313 #ifdef CONFIG_DEBUG_INTERRUPTS
314 PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector);
322 static int update_irq_entry_state(struct guest_info * info) {
323 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
325 if (v3_excp_pending(info)) {
326 uint_t excp = v3_get_excp_number(info);
328 guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
330 if (info->excp_state.excp_error_code_valid) {
331 guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code;
332 guest_ctrl->EVENTINJ.ev = 1;
333 #ifdef CONFIG_DEBUG_INTERRUPTS
334 PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code);
338 guest_ctrl->EVENTINJ.vector = excp;
340 guest_ctrl->EVENTINJ.valid = 1;
342 #ifdef CONFIG_DEBUG_INTERRUPTS
343 PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n",
344 (int)info->num_exits,
345 guest_ctrl->EVENTINJ.vector,
346 (void *)(addr_t)info->ctrl_regs.cr2,
347 (void *)(addr_t)info->rip);
350 v3_injecting_excp(info, excp);
351 } else if (info->intr_state.irq_started == 1) {
352 #ifdef CONFIG_DEBUG_INTERRUPTS
353 PrintDebug("IRQ pending from previous injection\n");
355 guest_ctrl->guest_ctrl.V_IRQ = 1;
356 guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_state.irq_vector;
357 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
358 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
361 switch (v3_intr_pending(info)) {
362 case V3_EXTERNAL_IRQ: {
363 uint32_t irq = v3_get_intr(info);
365 guest_ctrl->guest_ctrl.V_IRQ = 1;
366 guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq;
367 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
368 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
370 #ifdef CONFIG_DEBUG_INTERRUPTS
371 PrintDebug("Injecting Interrupt %d (EIP=%p)\n",
372 guest_ctrl->guest_ctrl.V_INTR_VECTOR,
373 (void *)(addr_t)info->rip);
376 info->intr_state.irq_pending = 1;
377 info->intr_state.irq_vector = irq;
382 guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
384 case V3_SOFTWARE_INTR:
385 guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
388 guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
391 case V3_INVALID_INTR:
403 * CAUTION and DANGER!!!
405 * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function
406 * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies
407 * on its contents will cause things to break. The contents at the time of the exit WILL
408 * change before the exit handler is executed.
410 int v3_svm_enter(struct guest_info * info) {
411 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
412 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
414 addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
416 // Conditionally yield the CPU if the timeslice has expired
419 // disable global interrupts for vm state transition
422 // Synchronize the guest state to the VMCB
423 guest_state->cr0 = info->ctrl_regs.cr0;
424 guest_state->cr2 = info->ctrl_regs.cr2;
425 guest_state->cr3 = info->ctrl_regs.cr3;
426 guest_state->cr4 = info->ctrl_regs.cr4;
427 guest_state->dr6 = info->dbg_regs.dr6;
428 guest_state->dr7 = info->dbg_regs.dr7;
429 guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
430 guest_state->rflags = info->ctrl_regs.rflags;
431 guest_state->efer = info->ctrl_regs.efer;
433 guest_state->cpl = info->cpl;
435 v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
437 guest_state->rax = info->vm_regs.rax;
438 guest_state->rip = info->rip;
439 guest_state->rsp = info->vm_regs.rsp;
441 #ifdef CONFIG_SYMBIOTIC
442 if (info->sym_state.sym_call_active == 0) {
443 update_irq_entry_state(info);
446 update_irq_entry_state(info);
453 PrintDebug("SVM Entry to CS=%p rip=%p...\n",
454 (void *)(addr_t)info->segments.cs.base,
455 (void *)(addr_t)info->rip);
458 #ifdef CONFIG_SYMBIOTIC
459 if (info->sym_state.sym_call_active == 1) {
460 if (guest_ctrl->guest_ctrl.V_IRQ == 1) {
461 V3_Print("!!! Injecting Interrupt during Sym call !!!\n");
467 rdtscll(info->time_state.cached_host_tsc);
468 guest_ctrl->TSC_OFFSET = info->time_state.guest_tsc - info->time_state.cached_host_tsc;
470 v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[info->cpu_id]);
473 v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
475 // v3_print_cond("SVM Returned: Exit Code: %x\n", (uint32_t)(guest_ctrl->exit_code));
479 //PrintDebug("SVM Returned\n");
483 v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc);
486 // Save Guest state from VMCB
487 info->rip = guest_state->rip;
488 info->vm_regs.rsp = guest_state->rsp;
489 info->vm_regs.rax = guest_state->rax;
491 info->cpl = guest_state->cpl;
493 info->ctrl_regs.cr0 = guest_state->cr0;
494 info->ctrl_regs.cr2 = guest_state->cr2;
495 info->ctrl_regs.cr3 = guest_state->cr3;
496 info->ctrl_regs.cr4 = guest_state->cr4;
497 info->dbg_regs.dr6 = guest_state->dr6;
498 info->dbg_regs.dr7 = guest_state->dr7;
499 info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
500 info->ctrl_regs.rflags = guest_state->rflags;
501 info->ctrl_regs.efer = guest_state->efer;
503 v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
504 info->cpu_mode = v3_get_vm_cpu_mode(info);
505 info->mem_mode = v3_get_vm_mem_mode(info);
509 // save exit info here
510 exit_code = guest_ctrl->exit_code;
511 exit_info1 = guest_ctrl->exit_info1;
512 exit_info2 = guest_ctrl->exit_info2;
515 #ifdef CONFIG_SYMBIOTIC
516 if (info->sym_state.sym_call_active == 0) {
517 update_irq_exit_state(info);
520 update_irq_exit_state(info);
524 // reenable global interrupts after vm exit
528 // Conditionally yield the CPU if the timeslice has expired
532 if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) {
533 PrintError("Error in SVM exit handler\n");
542 int v3_start_svm_guest(struct guest_info *info) {
543 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
544 // vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
548 PrintDebug("Launching SVM VM (vmcb=%p)\n", (void *)info->vmm_data);
549 //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
551 info->run_state = VM_RUNNING;
552 rdtscll(info->yield_start_cycle);
556 if (v3_svm_enter(info) == -1) {
557 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
559 addr_t linear_addr = 0;
561 info->run_state = VM_ERROR;
563 V3_Print("SVM ERROR!!\n");
565 v3_print_guest_state(info);
567 V3_Print("SVM Exit Code: %p\n", (void *)(addr_t)guest_ctrl->exit_code);
569 V3_Print("exit_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
570 V3_Print("exit_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
572 V3_Print("exit_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
573 V3_Print("exit_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
575 linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
577 if (info->mem_mode == PHYSICAL_MEM) {
578 guest_pa_to_host_va(info, linear_addr, &host_addr);
579 } else if (info->mem_mode == VIRTUAL_MEM) {
580 guest_va_to_host_va(info, linear_addr, &host_addr);
583 V3_Print("Host Address of rip = 0x%p\n", (void *)host_addr);
585 V3_Print("Instr (15 bytes) at %p:\n", (void *)host_addr);
586 v3_dump_mem((uint8_t *)host_addr, 15);
588 v3_print_stack(info);
594 if ((info->num_exits % 5000) == 0) {
595 V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
607 /* Checks machine SVM capability */
608 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
609 int v3_is_svm_capable() {
610 uint_t vm_cr_low = 0, vm_cr_high = 0;
611 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
613 v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
615 PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx);
617 if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) {
618 V3_Print("SVM Not Available\n");
621 v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
623 PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low);
625 if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) {
626 V3_Print("SVM is available but is disabled.\n");
628 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
630 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
632 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
633 V3_Print("SVM BIOS Disabled, not unlockable\n");
635 V3_Print("SVM is locked with a key\n");
640 V3_Print("SVM is available and enabled.\n");
642 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
643 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax);
644 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx);
645 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx);
646 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
653 static int has_svm_nested_paging() {
654 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
656 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
658 //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
660 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
661 V3_Print("SVM Nested Paging not supported\n");
664 V3_Print("SVM Nested Paging supported\n");
670 void v3_init_svm_cpu(int cpu_id) {
672 extern v3_cpu_arch_t v3_cpu_types[];
674 // Enable SVM on the CPU
675 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
676 msr.e_reg.low |= EFER_MSR_svm_enable;
677 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
679 V3_Print("SVM Enabled\n");
681 // Setup the host state save area
682 host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4);
685 // msr.e_reg.high = 0;
686 //msr.e_reg.low = (uint_t)host_vmcb;
687 msr.r_reg = host_vmcbs[cpu_id];
689 PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]);
690 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
693 if (has_svm_nested_paging() == 1) {
694 v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU;
696 v3_cpu_types[cpu_id] = V3_SVM_CPU;
755 * Test VMSAVE/VMLOAD Latency
757 #define vmsave ".byte 0x0F,0x01,0xDB ; "
758 #define vmload ".byte 0x0F,0x01,0xDA ; "
760 uint32_t start_lo, start_hi;
761 uint32_t end_lo, end_hi;
764 __asm__ __volatile__ (
766 "movl %%eax, %%esi ; "
767 "movl %%edx, %%edi ; "
768 "movq %%rcx, %%rax ; "
771 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
772 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
783 PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
785 __asm__ __volatile__ (
787 "movl %%eax, %%esi ; "
788 "movl %%edx, %%edi ; "
789 "movq %%rcx, %%rax ; "
792 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
793 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
805 PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
807 /* End Latency Test */
818 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
819 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
820 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
824 guest_state->rsp = vm_info.vm_regs.rsp;
825 guest_state->rip = vm_info.rip;
828 /* I pretty much just gutted this from TVMM */
829 /* Note: That means its probably wrong */
831 // set the segment registers to mirror ours
832 guest_state->cs.selector = 1<<3;
833 guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
834 guest_state->cs.attrib.fields.S = 1;
835 guest_state->cs.attrib.fields.P = 1;
836 guest_state->cs.attrib.fields.db = 1;
837 guest_state->cs.attrib.fields.G = 1;
838 guest_state->cs.limit = 0xfffff;
839 guest_state->cs.base = 0;
841 struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
842 for ( i = 0; segregs[i] != NULL; i++) {
843 struct vmcb_selector * seg = segregs[i];
845 seg->selector = 2<<3;
846 seg->attrib.fields.type = 0x2; // Data Segment+read/write
847 seg->attrib.fields.S = 1;
848 seg->attrib.fields.P = 1;
849 seg->attrib.fields.db = 1;
850 seg->attrib.fields.G = 1;
851 seg->limit = 0xfffff;
857 /* JRL THIS HAS TO GO */
859 // guest_state->tr.selector = GetTR_Selector();
860 guest_state->tr.attrib.fields.type = 0x9;
861 guest_state->tr.attrib.fields.P = 1;
862 // guest_state->tr.limit = GetTR_Limit();
863 //guest_state->tr.base = GetTR_Base();// - 0x2000;
871 guest_state->efer |= EFER_MSR_svm_enable;
872 guest_state->rflags = 0x00000002; // The reserved bit is always 1
873 ctrl_area->svm_instrs.VMRUN = 1;
874 guest_state->cr0 = 0x00000001; // PE
875 ctrl_area->guest_ASID = 1;
878 // guest_state->cpl = 0;
884 ctrl_area->cr_writes.cr4 = 1;
886 ctrl_area->exceptions.de = 1;
887 ctrl_area->exceptions.df = 1;
888 ctrl_area->exceptions.pf = 1;
889 ctrl_area->exceptions.ts = 1;
890 ctrl_area->exceptions.ss = 1;
891 ctrl_area->exceptions.ac = 1;
892 ctrl_area->exceptions.mc = 1;
893 ctrl_area->exceptions.gp = 1;
894 ctrl_area->exceptions.ud = 1;
895 ctrl_area->exceptions.np = 1;
896 ctrl_area->exceptions.of = 1;
897 ctrl_area->exceptions.nmi = 1;
901 ctrl_area->instrs.IOIO_PROT = 1;
902 ctrl_area->IOPM_BASE_PA = (uint_t)V3_AllocPages(3);
906 tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
907 memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
910 ctrl_area->instrs.INTR = 1;
917 memset(gdt_buf, 0, 6);
918 memset(idt_buf, 0, 6);
921 uint_t gdt_base, idt_base;
922 ushort_t gdt_limit, idt_limit;
925 gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
926 gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
927 PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
930 idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
931 idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
932 PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
935 // gdt_base -= 0x2000;
936 //idt_base -= 0x2000;
938 guest_state->gdtr.base = gdt_base;
939 guest_state->gdtr.limit = gdt_limit;
940 guest_state->idtr.base = idt_base;
941 guest_state->idtr.limit = idt_limit;
947 // also determine if CPU supports nested paging
949 if (vm_info.page_tables) {
951 // Flush the TLB on entries/exits
952 ctrl_area->TLB_CONTROL = 1;
954 // Enable Nested Paging
955 ctrl_area->NP_ENABLE = 1;
957 PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
959 // Set the Nested Page Table pointer
960 ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
963 // ctrl_area->N_CR3 = Get_CR3();
964 // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
966 guest_state->g_pat = 0x7040600070406ULL;
968 PrintDebug("Set Nested CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(ctrl_area->N_CR3)), (uint_t)*((unsigned char *)&(ctrl_area->N_CR3) + 4));
969 PrintDebug("Set Guest CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
971 // guest_state->cr0 |= 0x80000000;