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 #ifndef CONFIG_DEBUG_SVM
49 #define PrintDebug(fmt, args...)
53 uint32_t v3_last_exit;
55 // This is a global pointer to the host's VMCB
56 static addr_t host_vmcbs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
60 extern void v3_stgi();
61 extern void v3_clgi();
62 //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs);
63 extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb);
66 static vmcb_t * Allocate_VMCB() {
67 vmcb_t * vmcb_page = NULL;
68 addr_t vmcb_pa = (addr_t)V3_AllocPages(1);
70 if ((void *)vmcb_pa == NULL) {
71 PrintError("Error allocating VMCB\n");
75 vmcb_page = (vmcb_t *)V3_VAddr((void *)vmcb_pa);
77 memset(vmcb_page, 0, 4096);
84 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
85 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
86 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
91 ctrl_area->svm_instrs.VMRUN = 1;
92 ctrl_area->svm_instrs.VMMCALL = 1;
93 ctrl_area->svm_instrs.VMLOAD = 1;
94 ctrl_area->svm_instrs.VMSAVE = 1;
95 ctrl_area->svm_instrs.STGI = 1;
96 ctrl_area->svm_instrs.CLGI = 1;
97 ctrl_area->svm_instrs.SKINIT = 1;
98 ctrl_area->svm_instrs.ICEBP = 1;
99 ctrl_area->svm_instrs.WBINVD = 1;
100 ctrl_area->svm_instrs.MONITOR = 1;
101 ctrl_area->svm_instrs.MWAIT_always = 1;
102 ctrl_area->svm_instrs.MWAIT_if_armed = 1;
103 ctrl_area->instrs.INVLPGA = 1;
104 ctrl_area->instrs.CPUID = 1;
106 ctrl_area->instrs.HLT = 1;
108 #ifdef CONFIG_TIME_VIRTUALIZE_TSC
109 ctrl_area->instrs.RDTSC = 1;
110 ctrl_area->svm_instrs.RDTSCP = 1;
113 // guest_state->cr0 = 0x00000001; // PE
116 ctrl_area->exceptions.de = 1;
117 ctrl_area->exceptions.df = 1;
119 ctrl_area->exceptions.ts = 1;
120 ctrl_area->exceptions.ss = 1;
121 ctrl_area->exceptions.ac = 1;
122 ctrl_area->exceptions.mc = 1;
123 ctrl_area->exceptions.gp = 1;
124 ctrl_area->exceptions.ud = 1;
125 ctrl_area->exceptions.np = 1;
126 ctrl_area->exceptions.of = 1;
128 ctrl_area->exceptions.nmi = 1;
132 ctrl_area->instrs.NMI = 1;
133 ctrl_area->instrs.SMI = 0; // allow SMIs to run in guest
134 ctrl_area->instrs.INIT = 1;
135 ctrl_area->instrs.PAUSE = 1;
136 ctrl_area->instrs.shutdown_evts = 1;
139 /* DEBUG FOR RETURN CODE */
140 ctrl_area->exit_code = 1;
143 /* Setup Guest Machine state */
145 core->vm_regs.rsp = 0x00;
148 core->vm_regs.rdx = 0x00000f00;
153 core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
154 core->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
155 core->ctrl_regs.efer |= EFER_MSR_svm_enable;
161 core->segments.cs.selector = 0xf000;
162 core->segments.cs.limit = 0xffff;
163 core->segments.cs.base = 0x0000000f0000LL;
165 // (raw attributes = 0xf3)
166 core->segments.cs.type = 0x3;
167 core->segments.cs.system = 0x1;
168 core->segments.cs.dpl = 0x3;
169 core->segments.cs.present = 1;
173 struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
174 &(core->segments.es), &(core->segments.fs),
175 &(core->segments.gs), NULL};
177 for ( i = 0; segregs[i] != NULL; i++) {
178 struct v3_segment * seg = segregs[i];
180 seg->selector = 0x0000;
181 // seg->base = seg->selector << 4;
182 seg->base = 0x00000000;
185 // (raw attributes = 0xf3)
192 core->segments.gdtr.limit = 0x0000ffff;
193 core->segments.gdtr.base = 0x0000000000000000LL;
194 core->segments.idtr.limit = 0x0000ffff;
195 core->segments.idtr.base = 0x0000000000000000LL;
197 core->segments.ldtr.selector = 0x0000;
198 core->segments.ldtr.limit = 0x0000ffff;
199 core->segments.ldtr.base = 0x0000000000000000LL;
200 core->segments.tr.selector = 0x0000;
201 core->segments.tr.limit = 0x0000ffff;
202 core->segments.tr.base = 0x0000000000000000LL;
205 core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
206 core->dbg_regs.dr7 = 0x0000000000000400LL;
209 ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->io_map.arch_data);
210 ctrl_area->instrs.IOIO_PROT = 1;
212 ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data);
213 ctrl_area->instrs.MSR_PROT = 1;
216 PrintDebug("Exiting on interrupts\n");
217 ctrl_area->guest_ctrl.V_INTR_MASKING = 1;
218 ctrl_area->instrs.INTR = 1;
221 if (core->shdw_pg_mode == SHADOW_PAGING) {
222 PrintDebug("Creating initial shadow page table\n");
224 /* JRL: This is a performance killer, and a simplistic solution */
225 /* We need to fix this */
226 ctrl_area->TLB_CONTROL = 1;
227 ctrl_area->guest_ASID = 1;
230 if (v3_init_passthrough_pts(core) == -1) {
231 PrintError("Could not initialize passthrough page tables\n");
236 core->shdw_pg_state.guest_cr0 = 0x0000000000000010LL;
237 PrintDebug("Created\n");
239 core->ctrl_regs.cr0 |= 0x80000000;
240 core->ctrl_regs.cr3 = core->direct_map_pt;
242 ctrl_area->cr_reads.cr0 = 1;
243 ctrl_area->cr_writes.cr0 = 1;
244 //ctrl_area->cr_reads.cr4 = 1;
245 ctrl_area->cr_writes.cr4 = 1;
246 ctrl_area->cr_reads.cr3 = 1;
247 ctrl_area->cr_writes.cr3 = 1;
249 v3_hook_msr(core->vm_info, EFER_MSR,
250 &v3_handle_efer_read,
251 &v3_handle_efer_write,
254 ctrl_area->instrs.INVLPG = 1;
256 ctrl_area->exceptions.pf = 1;
258 guest_state->g_pat = 0x7040600070406ULL;
262 } else if (core->shdw_pg_mode == NESTED_PAGING) {
263 // Flush the TLB on entries/exits
264 ctrl_area->TLB_CONTROL = 1;
265 ctrl_area->guest_ASID = 1;
267 // Enable Nested Paging
268 ctrl_area->NP_ENABLE = 1;
270 PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE));
272 // Set the Nested Page Table pointer
273 if (v3_init_passthrough_pts(core) == -1) {
274 PrintError("Could not initialize Nested page tables\n");
278 ctrl_area->N_CR3 = core->direct_map_pt;
280 guest_state->g_pat = 0x7040600070406ULL;
283 /* tell the guest that we don't support SVM */
284 v3_hook_msr(core->vm_info, SVM_VM_CR_MSR,
285 &v3_handle_vm_cr_read,
286 &v3_handle_vm_cr_write,
291 int v3_init_svm_vmcb(struct guest_info * core, v3_vm_class_t vm_class) {
293 PrintDebug("Allocating VMCB\n");
294 core->vmm_data = (void *)Allocate_VMCB();
296 if (core->vmm_data == NULL) {
297 PrintError("Could not allocate VMCB, Exiting...\n");
301 if (vm_class == V3_PC_VM) {
302 PrintDebug("Initializing VMCB (addr=%p)\n", (void *)core->vmm_data);
303 Init_VMCB_BIOS((vmcb_t*)(core->vmm_data), core);
305 PrintError("Invalid VM class\n");
313 int v3_deinit_svm_vmcb(struct guest_info * core) {
314 V3_FreePages(V3_PAddr(core->vmm_data), 1);
319 static int update_irq_exit_state(struct guest_info * info) {
320 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
322 // Fix for QEMU bug using EVENTINJ as an internal cache
323 guest_ctrl->EVENTINJ.valid = 0;
325 if ((info->intr_core_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) {
327 #ifdef CONFIG_DEBUG_INTERRUPTS
328 PrintDebug("INTAK cycle completed for irq %d\n", info->intr_core_state.irq_vector);
331 info->intr_core_state.irq_started = 1;
332 info->intr_core_state.irq_pending = 0;
334 v3_injecting_intr(info, info->intr_core_state.irq_vector, V3_EXTERNAL_IRQ);
337 if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) {
338 #ifdef CONFIG_DEBUG_INTERRUPTS
339 PrintDebug("Interrupt %d taken by guest\n", info->intr_core_state.irq_vector);
342 // Interrupt was taken fully vectored
343 info->intr_core_state.irq_started = 0;
345 } else if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 1)) {
346 #ifdef CONFIG_DEBUG_INTERRUPTS
347 PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector);
355 static int update_irq_entry_state(struct guest_info * info) {
356 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
359 if (info->intr_core_state.irq_pending == 0) {
360 guest_ctrl->guest_ctrl.V_IRQ = 0;
361 guest_ctrl->guest_ctrl.V_INTR_VECTOR = 0;
364 if (v3_excp_pending(info)) {
365 uint_t excp = v3_get_excp_number(info);
367 guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
369 if (info->excp_state.excp_error_code_valid) {
370 guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code;
371 guest_ctrl->EVENTINJ.ev = 1;
372 #ifdef CONFIG_DEBUG_INTERRUPTS
373 PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code);
377 guest_ctrl->EVENTINJ.vector = excp;
379 guest_ctrl->EVENTINJ.valid = 1;
381 #ifdef CONFIG_DEBUG_INTERRUPTS
382 PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n",
383 (int)info->num_exits,
384 guest_ctrl->EVENTINJ.vector,
385 (void *)(addr_t)info->ctrl_regs.cr2,
386 (void *)(addr_t)info->rip);
389 v3_injecting_excp(info, excp);
390 } else if (info->intr_core_state.irq_started == 1) {
391 #ifdef CONFIG_DEBUG_INTERRUPTS
392 PrintDebug("IRQ pending from previous injection\n");
394 guest_ctrl->guest_ctrl.V_IRQ = 1;
395 guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_core_state.irq_vector;
396 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
397 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
400 switch (v3_intr_pending(info)) {
401 case V3_EXTERNAL_IRQ: {
402 uint32_t irq = v3_get_intr(info);
404 guest_ctrl->guest_ctrl.V_IRQ = 1;
405 guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq;
406 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
407 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
409 #ifdef CONFIG_DEBUG_INTERRUPTS
410 PrintDebug("Injecting Interrupt %d (EIP=%p)\n",
411 guest_ctrl->guest_ctrl.V_INTR_VECTOR,
412 (void *)(addr_t)info->rip);
415 info->intr_core_state.irq_pending = 1;
416 info->intr_core_state.irq_vector = irq;
421 guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
423 case V3_SOFTWARE_INTR:
424 guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
427 guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
430 case V3_INVALID_INTR:
442 * CAUTION and DANGER!!!
444 * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function
445 * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies
446 * on its contents will cause things to break. The contents at the time of the exit WILL
447 * change before the exit handler is executed.
449 int v3_svm_enter(struct guest_info * info) {
450 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
451 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
452 addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
454 // Conditionally yield the CPU if the timeslice has expired
457 v3_adjust_time(info);
459 // disable global interrupts for vm state transition
462 // Synchronize the guest state to the VMCB
463 guest_state->cr0 = info->ctrl_regs.cr0;
464 guest_state->cr2 = info->ctrl_regs.cr2;
465 guest_state->cr3 = info->ctrl_regs.cr3;
466 guest_state->cr4 = info->ctrl_regs.cr4;
467 guest_state->dr6 = info->dbg_regs.dr6;
468 guest_state->dr7 = info->dbg_regs.dr7;
469 guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
470 guest_state->rflags = info->ctrl_regs.rflags;
471 guest_state->efer = info->ctrl_regs.efer;
473 guest_state->cpl = info->cpl;
475 v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
477 guest_state->rax = info->vm_regs.rax;
478 guest_state->rip = info->rip;
479 guest_state->rsp = info->vm_regs.rsp;
481 #ifdef CONFIG_SYMCALL
482 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
483 update_irq_entry_state(info);
486 update_irq_entry_state(info);
493 PrintDebug("SVM Entry to CS=%p rip=%p...\n",
494 (void *)(addr_t)info->segments.cs.base,
495 (void *)(addr_t)info->rip);
498 #ifdef CONFIG_SYMCALL
499 if (info->sym_core_state.symcall_state.sym_call_active == 1) {
500 if (guest_ctrl->guest_ctrl.V_IRQ == 1) {
501 V3_Print("!!! Injecting Interrupt during Sym call !!!\n");
506 v3_update_timers(info);
507 #ifdef CONFIG_TIME_HIDE_VM_COST
508 v3_restart_time(info);
510 guest_ctrl->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
512 //V3_Print("Calling v3_svm_launch\n");
514 v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[info->cpu_id]);
516 //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
518 v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
520 #ifdef CONFIG_TIME_HIDE_VM_COST
522 #ifdef CONFIG_TIME_HIDE_EXIT_COST
523 v3_offset_time(info, -CONFIG_TIME_EXIT_COST_ADJUST);
527 //PrintDebug("SVM Returned\n");
531 // Save Guest state from VMCB
532 info->rip = guest_state->rip;
533 info->vm_regs.rsp = guest_state->rsp;
534 info->vm_regs.rax = guest_state->rax;
536 info->cpl = guest_state->cpl;
538 info->ctrl_regs.cr0 = guest_state->cr0;
539 info->ctrl_regs.cr2 = guest_state->cr2;
540 info->ctrl_regs.cr3 = guest_state->cr3;
541 info->ctrl_regs.cr4 = guest_state->cr4;
542 info->dbg_regs.dr6 = guest_state->dr6;
543 info->dbg_regs.dr7 = guest_state->dr7;
544 info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
545 info->ctrl_regs.rflags = guest_state->rflags;
546 info->ctrl_regs.efer = guest_state->efer;
548 v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
549 info->cpu_mode = v3_get_vm_cpu_mode(info);
550 info->mem_mode = v3_get_vm_mem_mode(info);
554 // save exit info here
555 exit_code = guest_ctrl->exit_code;
556 exit_info1 = guest_ctrl->exit_info1;
557 exit_info2 = guest_ctrl->exit_info2;
560 #ifdef CONFIG_SYMCALL
561 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
562 update_irq_exit_state(info);
565 update_irq_exit_state(info);
569 // reenable global interrupts after vm exit
573 // Conditionally yield the CPU if the timeslice has expired
578 if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) {
579 PrintError("Error in SVM exit handler\n");
588 int v3_start_svm_guest(struct guest_info * info) {
589 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
590 // vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
592 PrintDebug("Starting SVM core %u\n", info->cpu_id);
594 if (info->cpu_id == 0) {
595 info->core_run_state = CORE_RUNNING;
596 info->vm_info->run_state = VM_RUNNING;
598 PrintDebug("SVM core %u: Waiting for core initialization\n", info->cpu_id);
600 while (info->core_run_state == CORE_STOPPED) {
602 //PrintDebug("SVM core %u: still waiting for INIT\n",info->cpu_id);
605 PrintDebug("SVM core %u initialized\n", info->cpu_id);
608 PrintDebug("SVM core %u: I am starting at CS=0x%x (base=0x%p, limit=0x%x), RIP=0x%p\n",
609 info->cpu_id, info->segments.cs.selector, (void *)(info->segments.cs.base),
610 info->segments.cs.limit, (void *)(info->rip));
614 PrintDebug("SVM core %u: Launching SVM VM (vmcb=%p)\n", info->cpu_id, (void *)info->vmm_data);
615 //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
621 if (info->vm_info->run_state == VM_STOPPED) {
622 info->core_run_state = CORE_STOPPED;
626 if (v3_svm_enter(info) == -1) {
627 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
629 addr_t linear_addr = 0;
631 info->vm_info->run_state = VM_ERROR;
633 V3_Print("SVM core %u: SVM ERROR!!\n", info->cpu_id);
635 v3_print_guest_state(info);
637 V3_Print("SVM core %u: SVM Exit Code: %p\n", info->cpu_id, (void *)(addr_t)guest_ctrl->exit_code);
639 V3_Print("SVM core %u: exit_info1 low = 0x%.8x\n", info->cpu_id, *(uint_t*)&(guest_ctrl->exit_info1));
640 V3_Print("SVM core %u: exit_info1 high = 0x%.8x\n", info->cpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
642 V3_Print("SVM core %u: exit_info2 low = 0x%.8x\n", info->cpu_id, *(uint_t*)&(guest_ctrl->exit_info2));
643 V3_Print("SVM core %u: exit_info2 high = 0x%.8x\n", info->cpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
645 linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
647 if (info->mem_mode == PHYSICAL_MEM) {
648 v3_gpa_to_hva(info, linear_addr, &host_addr);
649 } else if (info->mem_mode == VIRTUAL_MEM) {
650 v3_gva_to_hva(info, linear_addr, &host_addr);
653 V3_Print("SVM core %u: Host Address of rip = 0x%p\n", info->cpu_id, (void *)host_addr);
655 V3_Print("SVM core %u: Instr (15 bytes) at %p:\n", info->cpu_id, (void *)host_addr);
656 v3_dump_mem((uint8_t *)host_addr, 15);
658 v3_print_stack(info);
664 if (info->vm_info->run_state == VM_STOPPED) {
665 info->core_run_state = CORE_STOPPED;
671 if ((info->num_exits % 5000) == 0) {
672 V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
678 // Need to take down the other cores on error...
687 /* Checks machine SVM capability */
688 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
689 int v3_is_svm_capable() {
690 uint_t vm_cr_low = 0, vm_cr_high = 0;
691 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
693 v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
695 PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx);
697 if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) {
698 V3_Print("SVM Not Available\n");
701 v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
703 PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low);
705 if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) {
706 V3_Print("SVM is available but is disabled.\n");
708 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
710 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
712 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
713 V3_Print("SVM BIOS Disabled, not unlockable\n");
715 V3_Print("SVM is locked with a key\n");
720 V3_Print("SVM is available and enabled.\n");
722 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
723 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax);
724 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx);
725 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx);
726 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
733 static int has_svm_nested_paging() {
734 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
736 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
738 //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
740 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
741 V3_Print("SVM Nested Paging not supported\n");
744 V3_Print("SVM Nested Paging supported\n");
750 void v3_init_svm_cpu(int cpu_id) {
752 extern v3_cpu_arch_t v3_cpu_types[];
754 // Enable SVM on the CPU
755 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
756 msr.e_reg.low |= EFER_MSR_svm_enable;
757 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
759 V3_Print("SVM Enabled\n");
761 // Setup the host state save area
762 host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4);
765 // msr.e_reg.high = 0;
766 //msr.e_reg.low = (uint_t)host_vmcb;
767 msr.r_reg = host_vmcbs[cpu_id];
769 PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]);
770 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
773 if (has_svm_nested_paging() == 1) {
774 v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU;
776 v3_cpu_types[cpu_id] = V3_SVM_CPU;
782 void v3_deinit_svm_cpu(int cpu_id) {
784 extern v3_cpu_arch_t v3_cpu_types[];
786 // reset SVM_VM_HSAVE_PA_MSR
787 // Does setting it to NULL disable??
789 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
792 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
793 msr.e_reg.low &= ~EFER_MSR_svm_enable;
794 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
796 v3_cpu_types[cpu_id] = V3_INVALID_CPU;
798 V3_FreePages((void *)host_vmcbs[cpu_id], 4);
800 V3_Print("Host CPU %d host area freed, and SVM disabled\n", cpu_id);
855 * Test VMSAVE/VMLOAD Latency
857 #define vmsave ".byte 0x0F,0x01,0xDB ; "
858 #define vmload ".byte 0x0F,0x01,0xDA ; "
860 uint32_t start_lo, start_hi;
861 uint32_t end_lo, end_hi;
864 __asm__ __volatile__ (
866 "movl %%eax, %%esi ; "
867 "movl %%edx, %%edi ; "
868 "movq %%rcx, %%rax ; "
871 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
872 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
883 PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
885 __asm__ __volatile__ (
887 "movl %%eax, %%esi ; "
888 "movl %%edx, %%edi ; "
889 "movq %%rcx, %%rax ; "
892 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
893 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
905 PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
907 /* End Latency Test */
918 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
919 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
920 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
924 guest_state->rsp = vm_info.vm_regs.rsp;
925 guest_state->rip = vm_info.rip;
928 /* I pretty much just gutted this from TVMM */
929 /* Note: That means its probably wrong */
931 // set the segment registers to mirror ours
932 guest_state->cs.selector = 1<<3;
933 guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
934 guest_state->cs.attrib.fields.S = 1;
935 guest_state->cs.attrib.fields.P = 1;
936 guest_state->cs.attrib.fields.db = 1;
937 guest_state->cs.attrib.fields.G = 1;
938 guest_state->cs.limit = 0xfffff;
939 guest_state->cs.base = 0;
941 struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
942 for ( i = 0; segregs[i] != NULL; i++) {
943 struct vmcb_selector * seg = segregs[i];
945 seg->selector = 2<<3;
946 seg->attrib.fields.type = 0x2; // Data Segment+read/write
947 seg->attrib.fields.S = 1;
948 seg->attrib.fields.P = 1;
949 seg->attrib.fields.db = 1;
950 seg->attrib.fields.G = 1;
951 seg->limit = 0xfffff;
957 /* JRL THIS HAS TO GO */
959 // guest_state->tr.selector = GetTR_Selector();
960 guest_state->tr.attrib.fields.type = 0x9;
961 guest_state->tr.attrib.fields.P = 1;
962 // guest_state->tr.limit = GetTR_Limit();
963 //guest_state->tr.base = GetTR_Base();// - 0x2000;
971 guest_state->efer |= EFER_MSR_svm_enable;
972 guest_state->rflags = 0x00000002; // The reserved bit is always 1
973 ctrl_area->svm_instrs.VMRUN = 1;
974 guest_state->cr0 = 0x00000001; // PE
975 ctrl_area->guest_ASID = 1;
978 // guest_state->cpl = 0;
984 ctrl_area->cr_writes.cr4 = 1;
986 ctrl_area->exceptions.de = 1;
987 ctrl_area->exceptions.df = 1;
988 ctrl_area->exceptions.pf = 1;
989 ctrl_area->exceptions.ts = 1;
990 ctrl_area->exceptions.ss = 1;
991 ctrl_area->exceptions.ac = 1;
992 ctrl_area->exceptions.mc = 1;
993 ctrl_area->exceptions.gp = 1;
994 ctrl_area->exceptions.ud = 1;
995 ctrl_area->exceptions.np = 1;
996 ctrl_area->exceptions.of = 1;
997 ctrl_area->exceptions.nmi = 1;
1001 ctrl_area->instrs.IOIO_PROT = 1;
1002 ctrl_area->IOPM_BASE_PA = (uint_t)V3_AllocPages(3);
1006 tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
1007 memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
1010 ctrl_area->instrs.INTR = 1;
1017 memset(gdt_buf, 0, 6);
1018 memset(idt_buf, 0, 6);
1021 uint_t gdt_base, idt_base;
1022 ushort_t gdt_limit, idt_limit;
1025 gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
1026 gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
1027 PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
1030 idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
1031 idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
1032 PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
1035 // gdt_base -= 0x2000;
1036 //idt_base -= 0x2000;
1038 guest_state->gdtr.base = gdt_base;
1039 guest_state->gdtr.limit = gdt_limit;
1040 guest_state->idtr.base = idt_base;
1041 guest_state->idtr.limit = idt_limit;
1047 // also determine if CPU supports nested paging
1049 if (vm_info.page_tables) {
1051 // Flush the TLB on entries/exits
1052 ctrl_area->TLB_CONTROL = 1;
1054 // Enable Nested Paging
1055 ctrl_area->NP_ENABLE = 1;
1057 PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
1059 // Set the Nested Page Table pointer
1060 ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
1063 // ctrl_area->N_CR3 = Get_CR3();
1064 // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
1066 guest_state->g_pat = 0x7040600070406ULL;
1068 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));
1069 PrintDebug("Set Guest CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
1071 // guest_state->cr0 |= 0x80000000;