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>
38 #include <palacios/vmm_barrier.h>
41 #include <palacios/vmm_direct_paging.h>
43 #include <palacios/vmm_ctrl_regs.h>
44 #include <palacios/svm_io.h>
46 #include <palacios/vmm_sprintf.h>
49 #ifndef V3_CONFIG_DEBUG_SVM
51 #define PrintDebug(fmt, args...)
55 uint32_t v3_last_exit;
57 // This is a global pointer to the host's VMCB
58 static addr_t host_vmcbs[V3_CONFIG_MAX_CPUS] = { [0 ... V3_CONFIG_MAX_CPUS - 1] = 0};
62 extern void v3_stgi();
63 extern void v3_clgi();
64 //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs);
65 extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb);
68 static vmcb_t * Allocate_VMCB() {
69 vmcb_t * vmcb_page = NULL;
70 addr_t vmcb_pa = (addr_t)V3_AllocPages(1);
72 if ((void *)vmcb_pa == NULL) {
73 PrintError("Error allocating VMCB\n");
77 vmcb_page = (vmcb_t *)V3_VAddr((void *)vmcb_pa);
79 memset(vmcb_page, 0, 4096);
85 static int v3_svm_handle_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data)
89 // Call arch-independent handler
90 if ((status = v3_handle_efer_write(core, msr, src, priv_data)) != 0) {
96 // Ensure that hardware visible EFER.SVME bit is set (SVM Enable)
97 struct efer_64 * hw_efer = (struct efer_64 *)&(core->ctrl_regs.efer);
105 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
106 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
107 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
112 ctrl_area->svm_instrs.VMRUN = 1;
113 ctrl_area->svm_instrs.VMMCALL = 1;
114 ctrl_area->svm_instrs.VMLOAD = 1;
115 ctrl_area->svm_instrs.VMSAVE = 1;
116 ctrl_area->svm_instrs.STGI = 1;
117 ctrl_area->svm_instrs.CLGI = 1;
118 ctrl_area->svm_instrs.SKINIT = 1;
119 ctrl_area->svm_instrs.ICEBP = 1;
120 ctrl_area->svm_instrs.WBINVD = 1;
121 ctrl_area->svm_instrs.MONITOR = 1;
122 ctrl_area->svm_instrs.MWAIT_always = 1;
123 ctrl_area->svm_instrs.MWAIT_if_armed = 1;
124 ctrl_area->instrs.INVLPGA = 1;
125 ctrl_area->instrs.CPUID = 1;
127 ctrl_area->instrs.HLT = 1;
129 #ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
130 ctrl_area->instrs.RDTSC = 1;
131 ctrl_area->svm_instrs.RDTSCP = 1;
134 // guest_state->cr0 = 0x00000001; // PE
137 ctrl_area->exceptions.de = 1;
138 ctrl_area->exceptions.df = 1;
140 ctrl_area->exceptions.ts = 1;
141 ctrl_area->exceptions.ss = 1;
142 ctrl_area->exceptions.ac = 1;
143 ctrl_area->exceptions.mc = 1;
144 ctrl_area->exceptions.gp = 1;
145 ctrl_area->exceptions.ud = 1;
146 ctrl_area->exceptions.np = 1;
147 ctrl_area->exceptions.of = 1;
149 ctrl_area->exceptions.nmi = 1;
153 ctrl_area->instrs.NMI = 1;
154 ctrl_area->instrs.SMI = 0; // allow SMIs to run in guest
155 ctrl_area->instrs.INIT = 1;
156 ctrl_area->instrs.PAUSE = 1;
157 ctrl_area->instrs.shutdown_evts = 1;
160 /* DEBUG FOR RETURN CODE */
161 ctrl_area->exit_code = 1;
164 /* Setup Guest Machine state */
166 core->vm_regs.rsp = 0x00;
169 core->vm_regs.rdx = 0x00000f00;
174 core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
175 core->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
176 core->ctrl_regs.efer |= EFER_MSR_svm_enable;
182 core->segments.cs.selector = 0xf000;
183 core->segments.cs.limit = 0xffff;
184 core->segments.cs.base = 0x0000000f0000LL;
186 // (raw attributes = 0xf3)
187 core->segments.cs.type = 0x3;
188 core->segments.cs.system = 0x1;
189 core->segments.cs.dpl = 0x3;
190 core->segments.cs.present = 1;
194 struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
195 &(core->segments.es), &(core->segments.fs),
196 &(core->segments.gs), NULL};
198 for ( i = 0; segregs[i] != NULL; i++) {
199 struct v3_segment * seg = segregs[i];
201 seg->selector = 0x0000;
202 // seg->base = seg->selector << 4;
203 seg->base = 0x00000000;
206 // (raw attributes = 0xf3)
213 core->segments.gdtr.limit = 0x0000ffff;
214 core->segments.gdtr.base = 0x0000000000000000LL;
215 core->segments.idtr.limit = 0x0000ffff;
216 core->segments.idtr.base = 0x0000000000000000LL;
218 core->segments.ldtr.selector = 0x0000;
219 core->segments.ldtr.limit = 0x0000ffff;
220 core->segments.ldtr.base = 0x0000000000000000LL;
221 core->segments.tr.selector = 0x0000;
222 core->segments.tr.limit = 0x0000ffff;
223 core->segments.tr.base = 0x0000000000000000LL;
226 core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
227 core->dbg_regs.dr7 = 0x0000000000000400LL;
230 ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->io_map.arch_data);
231 ctrl_area->instrs.IOIO_PROT = 1;
233 ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data);
234 ctrl_area->instrs.MSR_PROT = 1;
237 PrintDebug("Exiting on interrupts\n");
238 ctrl_area->guest_ctrl.V_INTR_MASKING = 1;
239 ctrl_area->instrs.INTR = 1;
242 v3_hook_msr(core->vm_info, EFER_MSR,
243 &v3_handle_efer_read,
244 &v3_svm_handle_efer_write,
247 if (core->shdw_pg_mode == SHADOW_PAGING) {
248 PrintDebug("Creating initial shadow page table\n");
250 /* JRL: This is a performance killer, and a simplistic solution */
251 /* We need to fix this */
252 ctrl_area->TLB_CONTROL = 1;
253 ctrl_area->guest_ASID = 1;
256 if (v3_init_passthrough_pts(core) == -1) {
257 PrintError("Could not initialize passthrough page tables\n");
262 core->shdw_pg_state.guest_cr0 = 0x0000000000000010LL;
263 PrintDebug("Created\n");
265 core->ctrl_regs.cr0 |= 0x80000000;
266 core->ctrl_regs.cr3 = core->direct_map_pt;
268 ctrl_area->cr_reads.cr0 = 1;
269 ctrl_area->cr_writes.cr0 = 1;
270 //ctrl_area->cr_reads.cr4 = 1;
271 ctrl_area->cr_writes.cr4 = 1;
272 ctrl_area->cr_reads.cr3 = 1;
273 ctrl_area->cr_writes.cr3 = 1;
277 ctrl_area->instrs.INVLPG = 1;
279 ctrl_area->exceptions.pf = 1;
281 guest_state->g_pat = 0x7040600070406ULL;
285 } else if (core->shdw_pg_mode == NESTED_PAGING) {
286 // Flush the TLB on entries/exits
287 ctrl_area->TLB_CONTROL = 1;
288 ctrl_area->guest_ASID = 1;
290 // Enable Nested Paging
291 ctrl_area->NP_ENABLE = 1;
293 PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE));
295 // Set the Nested Page Table pointer
296 if (v3_init_passthrough_pts(core) == -1) {
297 PrintError("Could not initialize Nested page tables\n");
301 ctrl_area->N_CR3 = core->direct_map_pt;
303 guest_state->g_pat = 0x7040600070406ULL;
306 /* tell the guest that we don't support SVM */
307 v3_hook_msr(core->vm_info, SVM_VM_CR_MSR,
308 &v3_handle_vm_cr_read,
309 &v3_handle_vm_cr_write,
314 int v3_init_svm_vmcb(struct guest_info * core, v3_vm_class_t vm_class) {
316 PrintDebug("Allocating VMCB\n");
317 core->vmm_data = (void *)Allocate_VMCB();
319 if (core->vmm_data == NULL) {
320 PrintError("Could not allocate VMCB, Exiting...\n");
324 if (vm_class == V3_PC_VM) {
325 PrintDebug("Initializing VMCB (addr=%p)\n", (void *)core->vmm_data);
326 Init_VMCB_BIOS((vmcb_t*)(core->vmm_data), core);
328 PrintError("Invalid VM class\n");
336 int v3_deinit_svm_vmcb(struct guest_info * core) {
337 V3_FreePages(V3_PAddr(core->vmm_data), 1);
342 static int update_irq_exit_state(struct guest_info * info) {
343 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
345 // Fix for QEMU bug using EVENTINJ as an internal cache
346 guest_ctrl->EVENTINJ.valid = 0;
348 if ((info->intr_core_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) {
350 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
351 PrintDebug("INTAK cycle completed for irq %d\n", info->intr_core_state.irq_vector);
354 info->intr_core_state.irq_started = 1;
355 info->intr_core_state.irq_pending = 0;
357 v3_injecting_intr(info, info->intr_core_state.irq_vector, V3_EXTERNAL_IRQ);
360 if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) {
361 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
362 PrintDebug("Interrupt %d taken by guest\n", info->intr_core_state.irq_vector);
365 // Interrupt was taken fully vectored
366 info->intr_core_state.irq_started = 0;
368 } else if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 1)) {
369 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
370 PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector);
378 static int update_irq_entry_state(struct guest_info * info) {
379 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
382 if (info->intr_core_state.irq_pending == 0) {
383 guest_ctrl->guest_ctrl.V_IRQ = 0;
384 guest_ctrl->guest_ctrl.V_INTR_VECTOR = 0;
387 if (v3_excp_pending(info)) {
388 uint_t excp = v3_get_excp_number(info);
390 guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
392 if (info->excp_state.excp_error_code_valid) {
393 guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code;
394 guest_ctrl->EVENTINJ.ev = 1;
395 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
396 PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code);
400 guest_ctrl->EVENTINJ.vector = excp;
402 guest_ctrl->EVENTINJ.valid = 1;
404 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
405 PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n",
406 (int)info->num_exits,
407 guest_ctrl->EVENTINJ.vector,
408 (void *)(addr_t)info->ctrl_regs.cr2,
409 (void *)(addr_t)info->rip);
412 v3_injecting_excp(info, excp);
413 } else if (info->intr_core_state.irq_started == 1) {
414 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
415 PrintDebug("IRQ pending from previous injection\n");
417 guest_ctrl->guest_ctrl.V_IRQ = 1;
418 guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_core_state.irq_vector;
419 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
420 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
423 switch (v3_intr_pending(info)) {
424 case V3_EXTERNAL_IRQ: {
425 uint32_t irq = v3_get_intr(info);
427 guest_ctrl->guest_ctrl.V_IRQ = 1;
428 guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq;
429 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
430 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
432 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
433 PrintDebug("Injecting Interrupt %d (EIP=%p)\n",
434 guest_ctrl->guest_ctrl.V_INTR_VECTOR,
435 (void *)(addr_t)info->rip);
438 info->intr_core_state.irq_pending = 1;
439 info->intr_core_state.irq_vector = irq;
444 guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
446 case V3_SOFTWARE_INTR:
447 guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
449 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
450 PrintDebug("Injecting software interrupt -- type: %d, vector: %d\n",
451 SVM_INJECTION_SOFT_INTR, info->intr_core_state.swintr_vector);
453 guest_ctrl->EVENTINJ.vector = info->intr_core_state.swintr_vector;
454 guest_ctrl->EVENTINJ.valid = 1;
456 /* reset swintr state */
457 info->intr_core_state.swintr_posted = 0;
458 info->intr_core_state.swintr_vector = 0;
462 guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
465 case V3_INVALID_INTR:
477 * CAUTION and DANGER!!!
479 * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function
480 * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies
481 * on its contents will cause things to break. The contents at the time of the exit WILL
482 * change before the exit handler is executed.
484 int v3_svm_enter(struct guest_info * info) {
485 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
486 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
487 addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
489 // Conditionally yield the CPU if the timeslice has expired
492 // Perform any additional yielding needed for time adjustment
493 v3_adjust_time(info);
495 // disable global interrupts for vm state transition
498 // Update timer devices after being in the VM, with interupts
499 // disabled, but before doing IRQ updates, so that any interrupts they
500 //raise get seen immediately.
501 v3_update_timers(info);
503 // Synchronize the guest state to the VMCB
504 guest_state->cr0 = info->ctrl_regs.cr0;
505 guest_state->cr2 = info->ctrl_regs.cr2;
506 guest_state->cr3 = info->ctrl_regs.cr3;
507 guest_state->cr4 = info->ctrl_regs.cr4;
508 guest_state->dr6 = info->dbg_regs.dr6;
509 guest_state->dr7 = info->dbg_regs.dr7;
510 guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
511 guest_state->rflags = info->ctrl_regs.rflags;
512 guest_state->efer = info->ctrl_regs.efer;
514 guest_state->cpl = info->cpl;
516 v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
518 guest_state->rax = info->vm_regs.rax;
519 guest_state->rip = info->rip;
520 guest_state->rsp = info->vm_regs.rsp;
522 #ifdef V3_CONFIG_SYMCALL
523 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
524 update_irq_entry_state(info);
527 update_irq_entry_state(info);
534 PrintDebug("SVM Entry to CS=%p rip=%p...\n",
535 (void *)(addr_t)info->segments.cs.base,
536 (void *)(addr_t)info->rip);
539 #ifdef V3_CONFIG_SYMCALL
540 if (info->sym_core_state.symcall_state.sym_call_active == 1) {
541 if (guest_ctrl->guest_ctrl.V_IRQ == 1) {
542 V3_Print("!!! Injecting Interrupt during Sym call !!!\n");
547 v3_time_enter_vm(info);
548 guest_ctrl->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
550 //V3_Print("Calling v3_svm_launch\n");
552 v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[V3_Get_CPU()]);
554 //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
556 v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
558 // Immediate exit from VM time bookkeeping
559 v3_time_exit_vm(info);
563 // Save Guest state from VMCB
564 info->rip = guest_state->rip;
565 info->vm_regs.rsp = guest_state->rsp;
566 info->vm_regs.rax = guest_state->rax;
568 info->cpl = guest_state->cpl;
570 info->ctrl_regs.cr0 = guest_state->cr0;
571 info->ctrl_regs.cr2 = guest_state->cr2;
572 info->ctrl_regs.cr3 = guest_state->cr3;
573 info->ctrl_regs.cr4 = guest_state->cr4;
574 info->dbg_regs.dr6 = guest_state->dr6;
575 info->dbg_regs.dr7 = guest_state->dr7;
576 info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
577 info->ctrl_regs.rflags = guest_state->rflags;
578 info->ctrl_regs.efer = guest_state->efer;
580 v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
581 info->cpu_mode = v3_get_vm_cpu_mode(info);
582 info->mem_mode = v3_get_vm_mem_mode(info);
585 // save exit info here
586 exit_code = guest_ctrl->exit_code;
587 exit_info1 = guest_ctrl->exit_info1;
588 exit_info2 = guest_ctrl->exit_info2;
590 #ifdef V3_CONFIG_SYMCALL
591 if (info->sym_core_state.symcall_state.sym_call_active == 0) {
592 update_irq_exit_state(info);
595 update_irq_exit_state(info);
598 // reenable global interrupts after vm exit
601 // Conditionally yield the CPU if the timeslice has expired
605 int ret = v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2);
608 PrintError("Error in SVM exit handler (ret=%d)\n", ret);
609 PrintError(" last Exit was %d (exit code=0x%llx)\n", v3_last_exit, (uint64_t) exit_code);
619 int v3_start_svm_guest(struct guest_info * info) {
620 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
621 // vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
623 PrintDebug("Starting SVM core %u (on logical core %u)\n", info->vcpu_id, info->pcpu_id);
625 if (info->vcpu_id == 0) {
626 info->core_run_state = CORE_RUNNING;
627 info->vm_info->run_state = VM_RUNNING;
629 PrintDebug("SVM core %u (on %u): Waiting for core initialization\n", info->vcpu_id, info->pcpu_id);
631 while (info->core_run_state == CORE_STOPPED) {
633 //PrintDebug("SVM core %u: still waiting for INIT\n", info->vcpu_id);
636 PrintDebug("SVM core %u(on %u) initialized\n", info->vcpu_id, info->pcpu_id);
639 PrintDebug("SVM core %u(on %u): I am starting at CS=0x%x (base=0x%p, limit=0x%x), RIP=0x%p\n",
640 info->vcpu_id, info->pcpu_id,
641 info->segments.cs.selector, (void *)(info->segments.cs.base),
642 info->segments.cs.limit, (void *)(info->rip));
646 PrintDebug("SVM core %u: Launching SVM VM (vmcb=%p) (on cpu %u)\n",
647 info->vcpu_id, (void *)info->vmm_data, info->pcpu_id);
648 //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
654 if (info->vm_info->run_state == VM_STOPPED) {
655 info->core_run_state = CORE_STOPPED;
659 if (v3_svm_enter(info) == -1) {
660 vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
662 addr_t linear_addr = 0;
664 info->vm_info->run_state = VM_ERROR;
666 V3_Print("SVM core %u: SVM ERROR!!\n", info->vcpu_id);
668 v3_print_guest_state(info);
670 V3_Print("SVM core %u: SVM Exit Code: %p\n", info->vcpu_id, (void *)(addr_t)guest_ctrl->exit_code);
672 V3_Print("SVM core %u: exit_info1 low = 0x%.8x\n", info->vcpu_id, *(uint_t*)&(guest_ctrl->exit_info1));
673 V3_Print("SVM core %u: exit_info1 high = 0x%.8x\n", info->vcpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
675 V3_Print("SVM core %u: exit_info2 low = 0x%.8x\n", info->vcpu_id, *(uint_t*)&(guest_ctrl->exit_info2));
676 V3_Print("SVM core %u: exit_info2 high = 0x%.8x\n", info->vcpu_id, *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
678 linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
680 if (info->mem_mode == PHYSICAL_MEM) {
681 v3_gpa_to_hva(info, linear_addr, &host_addr);
682 } else if (info->mem_mode == VIRTUAL_MEM) {
683 v3_gva_to_hva(info, linear_addr, &host_addr);
686 V3_Print("SVM core %u: Host Address of rip = 0x%p\n", info->vcpu_id, (void *)host_addr);
688 V3_Print("SVM core %u: Instr (15 bytes) at %p:\n", info->vcpu_id, (void *)host_addr);
689 v3_dump_mem((uint8_t *)host_addr, 15);
691 v3_print_stack(info);
696 v3_wait_at_barrier(info);
699 if (info->vm_info->run_state == VM_STOPPED) {
700 info->core_run_state = CORE_STOPPED;
707 if ((info->num_exits % 50000) == 0) {
708 V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
709 v3_print_guest_state(info);
715 // Need to take down the other cores on error...
723 int v3_reset_svm_vm_core(struct guest_info * core, addr_t rip) {
726 // Write the RIP, CS, and descriptor
727 // assume the rest is already good to go
729 // vector VV -> rip at 0
731 // This means we start executing at linear address VV000
733 // So the selector needs to be VV00
734 // and the base needs to be VV000
737 core->segments.cs.selector = rip << 8;
738 core->segments.cs.limit = 0xffff;
739 core->segments.cs.base = rip << 12;
749 /* Checks machine SVM capability */
750 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
751 int v3_is_svm_capable() {
752 uint_t vm_cr_low = 0, vm_cr_high = 0;
753 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
755 v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
757 PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx);
759 if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) {
760 V3_Print("SVM Not Available\n");
763 v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
765 PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low);
767 if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) {
768 V3_Print("SVM is available but is disabled.\n");
770 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
772 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
774 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
775 V3_Print("SVM BIOS Disabled, not unlockable\n");
777 V3_Print("SVM is locked with a key\n");
782 V3_Print("SVM is available and enabled.\n");
784 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
785 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax);
786 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx);
787 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx);
788 PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
795 static int has_svm_nested_paging() {
796 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
798 v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
800 //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
802 if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
803 V3_Print("SVM Nested Paging not supported\n");
806 V3_Print("SVM Nested Paging supported\n");
813 void v3_init_svm_cpu(int cpu_id) {
815 extern v3_cpu_arch_t v3_cpu_types[];
817 // Enable SVM on the CPU
818 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
819 msr.e_reg.low |= EFER_MSR_svm_enable;
820 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
822 V3_Print("SVM Enabled\n");
824 // Setup the host state save area
825 host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4);
828 // msr.e_reg.high = 0;
829 //msr.e_reg.low = (uint_t)host_vmcb;
830 msr.r_reg = host_vmcbs[cpu_id];
832 PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]);
833 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
836 if (has_svm_nested_paging() == 1) {
837 v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU;
839 v3_cpu_types[cpu_id] = V3_SVM_CPU;
845 void v3_deinit_svm_cpu(int cpu_id) {
847 extern v3_cpu_arch_t v3_cpu_types[];
849 // reset SVM_VM_HSAVE_PA_MSR
850 // Does setting it to NULL disable??
852 v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
855 v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
856 msr.e_reg.low &= ~EFER_MSR_svm_enable;
857 v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
859 v3_cpu_types[cpu_id] = V3_INVALID_CPU;
861 V3_FreePages((void *)host_vmcbs[cpu_id], 4);
863 V3_Print("Host CPU %d host area freed, and SVM disabled\n", cpu_id);
918 * Test VMSAVE/VMLOAD Latency
920 #define vmsave ".byte 0x0F,0x01,0xDB ; "
921 #define vmload ".byte 0x0F,0x01,0xDA ; "
923 uint32_t start_lo, start_hi;
924 uint32_t end_lo, end_hi;
927 __asm__ __volatile__ (
929 "movl %%eax, %%esi ; "
930 "movl %%edx, %%edi ; "
931 "movq %%rcx, %%rax ; "
934 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
935 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
946 PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
948 __asm__ __volatile__ (
950 "movl %%eax, %%esi ; "
951 "movl %%edx, %%edi ; "
952 "movq %%rcx, %%rax ; "
955 : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
956 : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
968 PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
970 /* End Latency Test */
981 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
982 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
983 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
987 guest_state->rsp = vm_info.vm_regs.rsp;
988 guest_state->rip = vm_info.rip;
991 /* I pretty much just gutted this from TVMM */
992 /* Note: That means its probably wrong */
994 // set the segment registers to mirror ours
995 guest_state->cs.selector = 1<<3;
996 guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
997 guest_state->cs.attrib.fields.S = 1;
998 guest_state->cs.attrib.fields.P = 1;
999 guest_state->cs.attrib.fields.db = 1;
1000 guest_state->cs.attrib.fields.G = 1;
1001 guest_state->cs.limit = 0xfffff;
1002 guest_state->cs.base = 0;
1004 struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
1005 for ( i = 0; segregs[i] != NULL; i++) {
1006 struct vmcb_selector * seg = segregs[i];
1008 seg->selector = 2<<3;
1009 seg->attrib.fields.type = 0x2; // Data Segment+read/write
1010 seg->attrib.fields.S = 1;
1011 seg->attrib.fields.P = 1;
1012 seg->attrib.fields.db = 1;
1013 seg->attrib.fields.G = 1;
1014 seg->limit = 0xfffff;
1020 /* JRL THIS HAS TO GO */
1022 // guest_state->tr.selector = GetTR_Selector();
1023 guest_state->tr.attrib.fields.type = 0x9;
1024 guest_state->tr.attrib.fields.P = 1;
1025 // guest_state->tr.limit = GetTR_Limit();
1026 //guest_state->tr.base = GetTR_Base();// - 0x2000;
1034 guest_state->efer |= EFER_MSR_svm_enable;
1035 guest_state->rflags = 0x00000002; // The reserved bit is always 1
1036 ctrl_area->svm_instrs.VMRUN = 1;
1037 guest_state->cr0 = 0x00000001; // PE
1038 ctrl_area->guest_ASID = 1;
1041 // guest_state->cpl = 0;
1047 ctrl_area->cr_writes.cr4 = 1;
1049 ctrl_area->exceptions.de = 1;
1050 ctrl_area->exceptions.df = 1;
1051 ctrl_area->exceptions.pf = 1;
1052 ctrl_area->exceptions.ts = 1;
1053 ctrl_area->exceptions.ss = 1;
1054 ctrl_area->exceptions.ac = 1;
1055 ctrl_area->exceptions.mc = 1;
1056 ctrl_area->exceptions.gp = 1;
1057 ctrl_area->exceptions.ud = 1;
1058 ctrl_area->exceptions.np = 1;
1059 ctrl_area->exceptions.of = 1;
1060 ctrl_area->exceptions.nmi = 1;
1064 ctrl_area->instrs.IOIO_PROT = 1;
1065 ctrl_area->IOPM_BASE_PA = (uint_t)V3_AllocPages(3);
1069 tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
1070 memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
1073 ctrl_area->instrs.INTR = 1;
1080 memset(gdt_buf, 0, 6);
1081 memset(idt_buf, 0, 6);
1084 uint_t gdt_base, idt_base;
1085 ushort_t gdt_limit, idt_limit;
1088 gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
1089 gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
1090 PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
1093 idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
1094 idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
1095 PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
1098 // gdt_base -= 0x2000;
1099 //idt_base -= 0x2000;
1101 guest_state->gdtr.base = gdt_base;
1102 guest_state->gdtr.limit = gdt_limit;
1103 guest_state->idtr.base = idt_base;
1104 guest_state->idtr.limit = idt_limit;
1110 // also determine if CPU supports nested paging
1112 if (vm_info.page_tables) {
1114 // Flush the TLB on entries/exits
1115 ctrl_area->TLB_CONTROL = 1;
1117 // Enable Nested Paging
1118 ctrl_area->NP_ENABLE = 1;
1120 PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
1122 // Set the Nested Page Table pointer
1123 ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
1126 // ctrl_area->N_CR3 = Get_CR3();
1127 // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
1129 guest_state->g_pat = 0x7040600070406ULL;
1131 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));
1132 PrintDebug("Set Guest CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
1134 // guest_state->cr0 |= 0x80000000;