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".
22 #include <palacios/svm.h>
23 #include <palacios/vmm.h>
25 #include <palacios/vmcb.h>
26 #include <palacios/vmm_mem.h>
27 #include <palacios/vmm_paging.h>
28 #include <palacios/svm_handler.h>
30 #include <palacios/vmm_debug.h>
31 #include <palacios/vm_guest_mem.h>
33 #include <palacios/vmm_decoder.h>
34 #include <palacios/vmm_string.h>
35 #include <palacios/vmm_lowlevel.h>
36 #include <palacios/svm_msr.h>
38 #include <palacios/vmm_rbtree.h>
39 #include <palacios/vmm_barrier.h>
40 #include <palacios/vmm_debug.h>
44 #ifdef V3_CONFIG_CHECKPOINT
45 #include <palacios/vmm_checkpoint.h>
48 #include <palacios/vmm_direct_paging.h>
50 #include <palacios/vmm_ctrl_regs.h>
51 #include <palacios/svm_io.h>
53 #include <palacios/vmm_sprintf.h>
56 #ifndef V3_CONFIG_DEBUG_SVM
58 #define PrintDebug(fmt, args...)
62 uint32_t v3_last_exit;
64 // This is a global pointer to the host's VMCB
65 static addr_t host_vmcbs[V3_CONFIG_MAX_CPUS] = { [0 ... V3_CONFIG_MAX_CPUS - 1] = 0};
69 extern void v3_stgi();
70 extern void v3_clgi();
71 //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs);
72 extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb);
75 static vmcb_t * Allocate_VMCB() {
76 vmcb_t * vmcb_page = NULL;
77 addr_t vmcb_pa = (addr_t)V3_AllocPages(1);
79 if ((void *)vmcb_pa == NULL) {
80 PrintError("Error allocating VMCB\n");
84 vmcb_page = (vmcb_t *)V3_VAddr((void *)vmcb_pa);
86 memset(vmcb_page, 0, 4096);
92 static int v3_svm_handle_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data)
96 // Call arch-independent handler
97 if ((status = v3_handle_efer_write(core, msr, src, priv_data)) != 0) {
103 // Ensure that hardware visible EFER.SVME bit is set (SVM Enable)
104 struct efer_64 * hw_efer = (struct efer_64 *)&(core->ctrl_regs.efer);
112 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
113 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
114 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
119 ctrl_area->svm_instrs.VMRUN = 1;
120 ctrl_area->svm_instrs.VMMCALL = 1;
121 ctrl_area->svm_instrs.VMLOAD = 1;
122 ctrl_area->svm_instrs.VMSAVE = 1;
123 ctrl_area->svm_instrs.STGI = 1;
124 ctrl_area->svm_instrs.CLGI = 1;
125 ctrl_area->svm_instrs.SKINIT = 1;
126 ctrl_area->svm_instrs.ICEBP = 1;
127 ctrl_area->svm_instrs.WBINVD = 1;
128 ctrl_area->svm_instrs.MONITOR = 1;
129 ctrl_area->svm_instrs.MWAIT_always = 1;
130 ctrl_area->svm_instrs.MWAIT_if_armed = 1;
131 ctrl_area->instrs.INVLPGA = 1;
132 ctrl_area->instrs.CPUID = 1;
134 ctrl_area->instrs.HLT = 1;
136 /* Set at VMM launch as needed */
137 ctrl_area->instrs.RDTSC = 0;
138 ctrl_area->svm_instrs.RDTSCP = 0;
140 // guest_state->cr0 = 0x00000001; // PE
143 ctrl_area->exceptions.de = 1;
144 ctrl_area->exceptions.df = 1;
146 ctrl_area->exceptions.ts = 1;
147 ctrl_area->exceptions.ss = 1;
148 ctrl_area->exceptions.ac = 1;
149 ctrl_area->exceptions.mc = 1;
150 ctrl_area->exceptions.gp = 1;
151 ctrl_area->exceptions.ud = 1;
152 ctrl_area->exceptions.np = 1;
153 ctrl_area->exceptions.of = 1;
155 ctrl_area->exceptions.nmi = 1;
159 ctrl_area->instrs.NMI = 1;
160 ctrl_area->instrs.SMI = 0; // allow SMIs to run in guest
161 ctrl_area->instrs.INIT = 1;
162 // ctrl_area->instrs.PAUSE = 1;
163 ctrl_area->instrs.shutdown_evts = 1;
166 /* DEBUG FOR RETURN CODE */
167 ctrl_area->exit_code = 1;
170 /* Setup Guest Machine state */
172 core->vm_regs.rsp = 0x00;
175 core->vm_regs.rdx = 0x00000f00;
180 core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
181 core->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
182 core->ctrl_regs.efer |= EFER_MSR_svm_enable;
188 core->segments.cs.selector = 0xf000;
189 core->segments.cs.limit = 0xffff;
190 core->segments.cs.base = 0x0000000f0000LL;
192 // (raw attributes = 0xf3)
193 core->segments.cs.type = 0x3;
194 core->segments.cs.system = 0x1;
195 core->segments.cs.dpl = 0x3;
196 core->segments.cs.present = 1;
200 struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
201 &(core->segments.es), &(core->segments.fs),
202 &(core->segments.gs), NULL};
204 for ( i = 0; segregs[i] != NULL; i++) {
205 struct v3_segment * seg = segregs[i];
207 seg->selector = 0x0000;
208 // seg->base = seg->selector << 4;
209 seg->base = 0x00000000;
212 // (raw attributes = 0xf3)
219 core->segments.gdtr.limit = 0x0000ffff;
220 core->segments.gdtr.base = 0x0000000000000000LL;
221 core->segments.idtr.limit = 0x0000ffff;
222 core->segments.idtr.base = 0x0000000000000000LL;
224 core->segments.ldtr.selector = 0x0000;
225 core->segments.ldtr.limit = 0x0000ffff;
226 core->segments.ldtr.base = 0x0000000000000000LL;
227 core->segments.tr.selector = 0x0000;
228 core->segments.tr.limit = 0x0000ffff;
229 core->segments.tr.base = 0x0000000000000000LL;
232 core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
233 core->dbg_regs.dr7 = 0x0000000000000400LL;
236 ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->io_map.arch_data);
237 ctrl_area->instrs.IOIO_PROT = 1;
239 ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data);
240 ctrl_area->instrs.MSR_PROT = 1;
243 PrintDebug("Exiting on interrupts\n");
244 ctrl_area->guest_ctrl.V_INTR_MASKING = 1;
245 ctrl_area->instrs.INTR = 1;
248 v3_hook_msr(core->vm_info, EFER_MSR,
249 &v3_handle_efer_read,
250 &v3_svm_handle_efer_write,
253 if (core->shdw_pg_mode == SHADOW_PAGING) {
254 PrintDebug("Creating initial shadow page table\n");
256 /* JRL: This is a performance killer, and a simplistic solution */
257 /* We need to fix this */
258 ctrl_area->TLB_CONTROL = 1;
259 ctrl_area->guest_ASID = 1;
262 if (v3_init_passthrough_pts(core) == -1) {
263 PrintError("Could not initialize passthrough page tables\n");
268 core->shdw_pg_state.guest_cr0 = 0x0000000000000010LL;
269 PrintDebug("Created\n");
271 core->ctrl_regs.cr0 |= 0x80000000;
272 core->ctrl_regs.cr3 = core->direct_map_pt;
274 ctrl_area->cr_reads.cr0 = 1;
275 ctrl_area->cr_writes.cr0 = 1;
276 //ctrl_area->cr_reads.cr4 = 1;
277 ctrl_area->cr_writes.cr4 = 1;
278 ctrl_area->cr_reads.cr3 = 1;
279 ctrl_area->cr_writes.cr3 = 1;
283 ctrl_area->instrs.INVLPG = 1;
285 ctrl_area->exceptions.pf = 1;
287 guest_state->g_pat = 0x7040600070406ULL;
291 } else if (core->shdw_pg_mode == NESTED_PAGING) {
292 // Flush the TLB on entries/exits
293 ctrl_area->TLB_CONTROL = 1;
294 ctrl_area->guest_ASID = 1;
296 // Enable Nested Paging
297 ctrl_area->NP_ENABLE = 1;
299 PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE));
301 // Set the Nested Page Table pointer
302 if (v3_init_passthrough_pts(core) == -1) {
303 PrintError("Could not initialize Nested page tables\n");
307 ctrl_area->N_CR3 = core->direct_map_pt;
309 guest_state->g_pat = 0x7040600070406ULL;
312 /* tell the guest that we don't support SVM */
313 v3_hook_msr(core->vm_info, SVM_VM_CR_MSR,
314 &v3_handle_vm_cr_read,
315 &v3_handle_vm_cr_write,
320 #define INT_PENDING_AMD_MSR 0xc0010055
322 v3_hook_msr(core->vm_info, IA32_STAR_MSR, NULL, NULL, NULL);
323 v3_hook_msr(core->vm_info, IA32_LSTAR_MSR, NULL, NULL, NULL);
324 v3_hook_msr(core->vm_info, IA32_FMASK_MSR, NULL, NULL, NULL);
325 v3_hook_msr(core->vm_info, IA32_KERN_GS_BASE_MSR, NULL, NULL, NULL);
326 v3_hook_msr(core->vm_info, IA32_CSTAR_MSR, NULL, NULL, NULL);
328 v3_hook_msr(core->vm_info, SYSENTER_CS_MSR, NULL, NULL, NULL);
329 v3_hook_msr(core->vm_info, SYSENTER_ESP_MSR, NULL, NULL, NULL);
330 v3_hook_msr(core->vm_info, SYSENTER_EIP_MSR, NULL, NULL, NULL);
333 v3_hook_msr(core->vm_info, FS_BASE_MSR, NULL, NULL, NULL);
334 v3_hook_msr(core->vm_info, GS_BASE_MSR, NULL, NULL, NULL);
336 // Passthrough read operations are ok.
337 v3_hook_msr(core->vm_info, INT_PENDING_AMD_MSR, NULL, v3_msr_unhandled_write, NULL);
342 int v3_init_svm_vmcb(struct guest_info * core, v3_vm_class_t vm_class) {
344 PrintDebug("Allocating VMCB\n");
345 core->vmm_data = (void *)Allocate_VMCB();
347 if (core->vmm_data == NULL) {
348 PrintError("Could not allocate VMCB, Exiting...\n");
352 if (vm_class == V3_PC_VM) {
353 PrintDebug("Initializing VMCB (addr=%p)\n", (void *)core->vmm_data);
354 Init_VMCB_BIOS((vmcb_t*)(core->vmm_data), core);
356 PrintError("Invalid VM class\n");
360 core->core_run_state = CORE_STOPPED;
366 int v3_deinit_svm_vmcb(struct guest_info * core) {
367 V3_FreePages(V3_PAddr(core->vmm_data), 1);
372 #ifdef V3_CONFIG_CHECKPOINT
373 int v3_svm_save_core(struct guest_info * core, void * ctx){
375 if (v3_chkpt_save_8(ctx, "cpl", &(core->cpl)) == -1) {
376 PrintError("Could not save SVM cpl\n");
380 if (v3_chkpt_save(ctx, "vmcb_data", PAGE_SIZE, core->vmm_data) == -1) {
381 PrintError("Could not save SVM vmcb\n");
388 int v3_svm_load_core(struct guest_info * core, void * ctx){
390 if (v3_chkpt_load_8(ctx, "cpl", &(core->cpl)) == -1) {
391 PrintError("Could not load SVM cpl\n");
395 if (v3_chkpt_load(ctx, "vmcb_data", PAGE_SIZE, core->vmm_data) == -1) {
403 static int update_irq_exit_state(struct guest_info * info) {
404 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
406 // Fix for QEMU bug using EVENTINJ as an internal cache
407 guest_ctrl->EVENTINJ.valid = 0;
409 if ((info->intr_core_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) {
411 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
412 PrintDebug("INTAK cycle completed for irq %d\n", info->intr_core_state.irq_vector);
415 info->intr_core_state.irq_started = 1;
416 info->intr_core_state.irq_pending = 0;
418 v3_injecting_intr(info, info->intr_core_state.irq_vector, V3_EXTERNAL_IRQ);
421 if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) {
422 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
423 PrintDebug("Interrupt %d taken by guest\n", info->intr_core_state.irq_vector);
426 // Interrupt was taken fully vectored
427 info->intr_core_state.irq_started = 0;
429 } else if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 1)) {
430 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
431 PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector);
439 static int update_irq_entry_state(struct guest_info * info) {
440 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
443 if (info->intr_core_state.irq_pending == 0) {
444 guest_ctrl->guest_ctrl.V_IRQ = 0;
445 guest_ctrl->guest_ctrl.V_INTR_VECTOR = 0;
448 if (v3_excp_pending(info)) {
449 uint_t excp = v3_get_excp_number(info);
451 guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
453 if (info->excp_state.excp_error_code_valid) {
454 guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code;
455 guest_ctrl->EVENTINJ.ev = 1;
456 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
457 PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code);
461 guest_ctrl->EVENTINJ.vector = excp;
463 guest_ctrl->EVENTINJ.valid = 1;
465 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
466 PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n",
467 (int)info->num_exits,
468 guest_ctrl->EVENTINJ.vector,
469 (void *)(addr_t)info->ctrl_regs.cr2,
470 (void *)(addr_t)info->rip);
473 v3_injecting_excp(info, excp);
474 } else if (info->intr_core_state.irq_started == 1) {
475 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
476 PrintDebug("IRQ pending from previous injection\n");
478 guest_ctrl->guest_ctrl.V_IRQ = 1;
479 guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_core_state.irq_vector;
480 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
481 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
484 switch (v3_intr_pending(info)) {
485 case V3_EXTERNAL_IRQ: {
486 uint32_t irq = v3_get_intr(info);
488 guest_ctrl->guest_ctrl.V_IRQ = 1;
489 guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq;
490 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
491 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
493 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
494 PrintDebug("Injecting Interrupt %d (EIP=%p)\n",
495 guest_ctrl->guest_ctrl.V_INTR_VECTOR,
496 (void *)(addr_t)info->rip);
499 info->intr_core_state.irq_pending = 1;
500 info->intr_core_state.irq_vector = irq;
505 guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
507 case V3_SOFTWARE_INTR:
508 guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
510 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
511 PrintDebug("Injecting software interrupt -- type: %d, vector: %d\n",
512 SVM_INJECTION_SOFT_INTR, info->intr_core_state.swintr_vector);
514 guest_ctrl->EVENTINJ.vector = info->intr_core_state.swintr_vector;
515 guest_ctrl->EVENTINJ.valid = 1;
517 /* reset swintr state */
518 info->intr_core_state.swintr_posted = 0;
519 info->intr_core_state.swintr_vector = 0;
523 guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
526 case V3_INVALID_INTR:
537 v3_svm_config_tsc_virtualization(struct guest_info * info) {
538 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
541 if (info->time_state.flags & VM_TIME_TRAP_RDTSC) {
542 ctrl_area->instrs.RDTSC = 1;
543 ctrl_area->svm_instrs.RDTSCP = 1;
545 ctrl_area->instrs.RDTSC = 0;
546 ctrl_area->svm_instrs.RDTSCP = 0;
548 if (info->time_state.flags & VM_TIME_TSC_PASSTHROUGH) {
549 ctrl_area->TSC_OFFSET = 0;
551 ctrl_area->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
558 * CAUTION and DANGER!!!
560 * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function
561 * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies
562 * on its contents will cause things to break. The contents at the time of the exit WILL
563 * change before the exit handler is executed.
565 int v3_svm_enter(struct guest_info * info) {
566 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
567 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
568 addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
569 uint64_t guest_cycles = 0;
571 // Conditionally yield the CPU if the timeslice has expired
572 v3_yield_cond(info,-1);
574 // Update timer devices after being in the VM before doing
575 // IRQ updates, so that any interrupts they raise get seen
577 v3_advance_time(info, NULL);
578 v3_update_timers(info);
580 // disable global interrupts for vm state transition
583 // Synchronize the guest state to the VMCB
584 guest_state->cr0 = info->ctrl_regs.cr0;
585 guest_state->cr2 = info->ctrl_regs.cr2;
586 guest_state->cr3 = info->ctrl_regs.cr3;
587 guest_state->cr4 = info->ctrl_regs.cr4;
588 guest_state->dr6 = info->dbg_regs.dr6;
589 guest_state->dr7 = info->dbg_regs.dr7;
590 guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
591 guest_state->rflags = info->ctrl_regs.rflags;
592 guest_state->efer = info->ctrl_regs.efer;
594 /* Synchronize MSRs */
595 guest_state->star = info->msrs.star;
596 guest_state->lstar = info->msrs.lstar;
597 guest_state->sfmask = info->msrs.sfmask;
598 guest_state->KernelGsBase = info->msrs.kern_gs_base;
600 guest_state->cpl = info->cpl;
602 v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
604 guest_state->rax = info->vm_regs.rax;
605 guest_state->rip = info->rip;
606 guest_state->rsp = info->vm_regs.rsp;
608 #ifdef V3_CONFIG_SYMCALL
609 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
610 update_irq_entry_state(info);
613 update_irq_entry_state(info);
620 PrintDebug("SVM Entry to CS=%p rip=%p...\n",
621 (void *)(addr_t)info->segments.cs.base,
622 (void *)(addr_t)info->rip);
625 #ifdef V3_CONFIG_SYMCALL
626 if (info->sym_core_state.symcall_state.sym_call_active == 1) {
627 if (guest_ctrl->guest_ctrl.V_IRQ == 1) {
628 V3_Print("!!! Injecting Interrupt during Sym call !!!\n");
633 v3_svm_config_tsc_virtualization(info);
635 //V3_Print("Calling v3_svm_launch\n");
637 uint64_t entry_tsc = 0;
638 uint64_t exit_tsc = 0;
642 v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[V3_Get_CPU()]);
646 guest_cycles = exit_tsc - entry_tsc;
650 //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
652 v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
654 v3_advance_time(info, &guest_cycles);
658 // Save Guest state from VMCB
659 info->rip = guest_state->rip;
660 info->vm_regs.rsp = guest_state->rsp;
661 info->vm_regs.rax = guest_state->rax;
663 info->cpl = guest_state->cpl;
665 info->ctrl_regs.cr0 = guest_state->cr0;
666 info->ctrl_regs.cr2 = guest_state->cr2;
667 info->ctrl_regs.cr3 = guest_state->cr3;
668 info->ctrl_regs.cr4 = guest_state->cr4;
669 info->dbg_regs.dr6 = guest_state->dr6;
670 info->dbg_regs.dr7 = guest_state->dr7;
671 info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
672 info->ctrl_regs.rflags = guest_state->rflags;
673 info->ctrl_regs.efer = guest_state->efer;
675 /* Synchronize MSRs */
676 info->msrs.star = guest_state->star;
677 info->msrs.lstar = guest_state->lstar;
678 info->msrs.sfmask = guest_state->sfmask;
679 info->msrs.kern_gs_base = guest_state->KernelGsBase;
681 v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
682 info->cpu_mode = v3_get_vm_cpu_mode(info);
683 info->mem_mode = v3_get_vm_mem_mode(info);
686 // save exit info here
687 exit_code = guest_ctrl->exit_code;
688 exit_info1 = guest_ctrl->exit_info1;
689 exit_info2 = guest_ctrl->exit_info2;
691 #ifdef V3_CONFIG_SYMCALL
692 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
693 update_irq_exit_state(info);
696 update_irq_exit_state(info);
699 // reenable global interrupts after vm exit
702 // Conditionally yield the CPU if the timeslice has expired
703 v3_yield_cond(info,-1);
705 // This update timers is for time-dependent handlers
706 // if we're slaved to host time
707 v3_advance_time(info, NULL);
708 v3_update_timers(info);
711 int ret = v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2);
714 PrintError("Error in SVM exit handler (ret=%d)\n", ret);
715 PrintError(" last Exit was %d (exit code=0x%llx)\n", v3_last_exit, (uint64_t) exit_code);
720 if (info->timeouts.timeout_active) {
721 /* Check to see if any timeouts have expired */
722 v3_handle_timeouts(info, guest_cycles);
730 int v3_start_svm_guest(struct guest_info * info) {
731 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
732 // vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
734 PrintDebug("Starting SVM core %u (on logical core %u)\n", info->vcpu_id, info->pcpu_id);
736 if (info->vcpu_id == 0) {
737 info->core_run_state = CORE_RUNNING;
739 PrintDebug("SVM core %u (on %u): Waiting for core initialization\n", info->vcpu_id, info->pcpu_id);
741 while (info->core_run_state == CORE_STOPPED) {
743 if (info->vm_info->run_state == VM_STOPPED) {
744 // The VM was stopped before this core was initialized.
749 //PrintDebug("SVM core %u: still waiting for INIT\n", info->vcpu_id);
752 PrintDebug("SVM core %u(on %u) initialized\n", info->vcpu_id, info->pcpu_id);
754 // We'll be paranoid about race conditions here
755 v3_wait_at_barrier(info);
758 PrintDebug("SVM core %u(on %u): I am starting at CS=0x%x (base=0x%p, limit=0x%x), RIP=0x%p\n",
759 info->vcpu_id, info->pcpu_id,
760 info->segments.cs.selector, (void *)(info->segments.cs.base),
761 info->segments.cs.limit, (void *)(info->rip));
765 PrintDebug("SVM core %u: Launching SVM VM (vmcb=%p) (on cpu %u)\n",
766 info->vcpu_id, (void *)info->vmm_data, info->pcpu_id);
767 //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
773 if (info->vm_info->run_state == VM_STOPPED) {
774 info->core_run_state = CORE_STOPPED;
778 if (v3_svm_enter(info) == -1) {
779 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
781 addr_t linear_addr = 0;
783 info->vm_info->run_state = VM_ERROR;
785 V3_Print("SVM core %u: SVM ERROR!!\n", info->vcpu_id);
787 v3_print_guest_state(info);
789 V3_Print("SVM core %u: SVM Exit Code: %p\n", info->vcpu_id, (void *)(addr_t)guest_ctrl->exit_code);
791 V3_Print("SVM core %u: exit_info1 low = 0x%.8x\n", info->vcpu_id, *(uint_t*)&(guest_ctrl->exit_info1));
792 V3_Print("SVM core %u: exit_info1 high = 0x%.8x\n", info->vcpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
794 V3_Print("SVM core %u: exit_info2 low = 0x%.8x\n", info->vcpu_id, *(uint_t*)&(guest_ctrl->exit_info2));
795 V3_Print("SVM core %u: exit_info2 high = 0x%.8x\n", info->vcpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
797 linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
799 if (info->mem_mode == PHYSICAL_MEM) {
800 v3_gpa_to_hva(info, linear_addr, &host_addr);
801 } else if (info->mem_mode == VIRTUAL_MEM) {
802 v3_gva_to_hva(info, linear_addr, &host_addr);
805 V3_Print("SVM core %u: Host Address of rip = 0x%p\n", info->vcpu_id, (void *)host_addr);
807 V3_Print("SVM core %u: Instr (15 bytes) at %p:\n", info->vcpu_id, (void *)host_addr);
808 v3_dump_mem((uint8_t *)host_addr, 15);
810 v3_print_stack(info);
815 v3_wait_at_barrier(info);
818 if (info->vm_info->run_state == VM_STOPPED) {
819 info->core_run_state = CORE_STOPPED;
826 if ((info->num_exits % 50000) == 0) {
827 V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
828 v3_print_guest_state(info);
834 // Need to take down the other cores on error...
842 int v3_reset_svm_vm_core(struct guest_info * core, addr_t rip) {
845 // Write the RIP, CS, and descriptor
846 // assume the rest is already good to go
848 // vector VV -> rip at 0
850 // This means we start executing at linear address VV000
852 // So the selector needs to be VV00
853 // and the base needs to be VV000
856 core->segments.cs.selector = rip << 8;
857 core->segments.cs.limit = 0xffff;
858 core->segments.cs.base = rip << 12;
868 /* Checks machine SVM capability */
869 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
870 int v3_is_svm_capable() {
871 uint_t vm_cr_low = 0, vm_cr_high = 0;
872 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
874 v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
876 PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx);
878 if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) {
879 V3_Print("SVM Not Available\n");
882 v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
884 PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low);
886 if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) {
887 V3_Print("SVM is available but is disabled.\n");
889 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
891 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
893 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
894 V3_Print("SVM BIOS Disabled, not unlockable\n");
896 V3_Print("SVM is locked with a key\n");
901 V3_Print("SVM is available and enabled.\n");
903 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
904 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax);
905 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx);
906 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx);
907 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
914 static int has_svm_nested_paging() {
915 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
917 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
919 //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
921 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
922 V3_Print("SVM Nested Paging not supported\n");
925 V3_Print("SVM Nested Paging supported\n");
932 void v3_init_svm_cpu(int cpu_id) {
934 extern v3_cpu_arch_t v3_cpu_types[];
936 // Enable SVM on the CPU
937 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
938 msr.e_reg.low |= EFER_MSR_svm_enable;
939 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
941 V3_Print("SVM Enabled\n");
943 // Setup the host state save area
944 host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4);
946 if (!host_vmcbs[cpu_id]) {
947 PrintError("Failed to allocate VMCB\n");
952 // msr.e_reg.high = 0;
953 //msr.e_reg.low = (uint_t)host_vmcb;
954 msr.r_reg = host_vmcbs[cpu_id];
956 PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]);
957 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
960 if (has_svm_nested_paging() == 1) {
961 v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU;
963 v3_cpu_types[cpu_id] = V3_SVM_CPU;
969 void v3_deinit_svm_cpu(int cpu_id) {
971 extern v3_cpu_arch_t v3_cpu_types[];
973 // reset SVM_VM_HSAVE_PA_MSR
974 // Does setting it to NULL disable??
976 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
979 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
980 msr.e_reg.low &= ~EFER_MSR_svm_enable;
981 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
983 v3_cpu_types[cpu_id] = V3_INVALID_CPU;
985 V3_FreePages((void *)host_vmcbs[cpu_id], 4);
987 V3_Print("Host CPU %d host area freed, and SVM disabled\n", cpu_id);
1042 * Test VMSAVE/VMLOAD Latency
1044 #define vmsave ".byte 0x0F,0x01,0xDB ; "
1045 #define vmload ".byte 0x0F,0x01,0xDA ; "
1047 uint32_t start_lo, start_hi;
1048 uint32_t end_lo, end_hi;
1049 uint64_t start, end;
1051 __asm__ __volatile__ (
1053 "movl %%eax, %%esi ; "
1054 "movl %%edx, %%edi ; "
1055 "movq %%rcx, %%rax ; "
1058 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
1059 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
1070 PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
1072 __asm__ __volatile__ (
1074 "movl %%eax, %%esi ; "
1075 "movl %%edx, %%edi ; "
1076 "movq %%rcx, %%rax ; "
1079 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
1080 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
1092 PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
1094 /* End Latency Test */
1105 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
1106 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
1107 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
1111 guest_state->rsp = vm_info.vm_regs.rsp;
1112 guest_state->rip = vm_info.rip;
1115 /* I pretty much just gutted this from TVMM */
1116 /* Note: That means its probably wrong */
1118 // set the segment registers to mirror ours
1119 guest_state->cs.selector = 1<<3;
1120 guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
1121 guest_state->cs.attrib.fields.S = 1;
1122 guest_state->cs.attrib.fields.P = 1;
1123 guest_state->cs.attrib.fields.db = 1;
1124 guest_state->cs.attrib.fields.G = 1;
1125 guest_state->cs.limit = 0xfffff;
1126 guest_state->cs.base = 0;
1128 struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
1129 for ( i = 0; segregs[i] != NULL; i++) {
1130 struct vmcb_selector * seg = segregs[i];
1132 seg->selector = 2<<3;
1133 seg->attrib.fields.type = 0x2; // Data Segment+read/write
1134 seg->attrib.fields.S = 1;
1135 seg->attrib.fields.P = 1;
1136 seg->attrib.fields.db = 1;
1137 seg->attrib.fields.G = 1;
1138 seg->limit = 0xfffff;
1144 /* JRL THIS HAS TO GO */
1146 // guest_state->tr.selector = GetTR_Selector();
1147 guest_state->tr.attrib.fields.type = 0x9;
1148 guest_state->tr.attrib.fields.P = 1;
1149 // guest_state->tr.limit = GetTR_Limit();
1150 //guest_state->tr.base = GetTR_Base();// - 0x2000;
1158 guest_state->efer |= EFER_MSR_svm_enable;
1159 guest_state->rflags = 0x00000002; // The reserved bit is always 1
1160 ctrl_area->svm_instrs.VMRUN = 1;
1161 guest_state->cr0 = 0x00000001; // PE
1162 ctrl_area->guest_ASID = 1;
1165 // guest_state->cpl = 0;
1171 ctrl_area->cr_writes.cr4 = 1;
1173 ctrl_area->exceptions.de = 1;
1174 ctrl_area->exceptions.df = 1;
1175 ctrl_area->exceptions.pf = 1;
1176 ctrl_area->exceptions.ts = 1;
1177 ctrl_area->exceptions.ss = 1;
1178 ctrl_area->exceptions.ac = 1;
1179 ctrl_area->exceptions.mc = 1;
1180 ctrl_area->exceptions.gp = 1;
1181 ctrl_area->exceptions.ud = 1;
1182 ctrl_area->exceptions.np = 1;
1183 ctrl_area->exceptions.of = 1;
1184 ctrl_area->exceptions.nmi = 1;
1188 ctrl_area->instrs.IOIO_PROT = 1;
1189 ctrl_area->IOPM_BASE_PA = (uint_t)V3_AllocPages(3);
1191 if (!ctrl_area->IOPM_BASE_PA) {
1192 PrintError("Cannot allocate IO bitmap\n");
1198 tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
1199 memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
1202 ctrl_area->instrs.INTR = 1;
1209 memset(gdt_buf, 0, 6);
1210 memset(idt_buf, 0, 6);
1213 uint_t gdt_base, idt_base;
1214 ushort_t gdt_limit, idt_limit;
1217 gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
1218 gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
1219 PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
1222 idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
1223 idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
1224 PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
1227 // gdt_base -= 0x2000;
1228 //idt_base -= 0x2000;
1230 guest_state->gdtr.base = gdt_base;
1231 guest_state->gdtr.limit = gdt_limit;
1232 guest_state->idtr.base = idt_base;
1233 guest_state->idtr.limit = idt_limit;
1239 // also determine if CPU supports nested paging
1241 if (vm_info.page_tables) {
1243 // Flush the TLB on entries/exits
1244 ctrl_area->TLB_CONTROL = 1;
1246 // Enable Nested Paging
1247 ctrl_area->NP_ENABLE = 1;
1249 PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
1251 // Set the Nested Page Table pointer
1252 ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
1255 // ctrl_area->N_CR3 = Get_CR3();
1256 // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
1258 guest_state->g_pat = 0x7040600070406ULL;
1260 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));
1261 PrintDebug("Set Guest CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
1263 // guest_state->cr0 |= 0x80000000;