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".
20 #include <palacios/vmx_handler.h>
21 #include <palacios/vmm_types.h>
22 #include <palacios/vmm.h>
23 #include <palacios/vmcs.h>
24 #include <palacios/vmx_lowlevel.h>
25 #include <palacios/vmx_io.h>
26 #include <palacios/vmm_cpuid.h>
28 #include <palacios/vmx.h>
29 #include <palacios/vmm_ctrl_regs.h>
30 #include <palacios/vmm_lowlevel.h>
31 #include <palacios/vmx_ctrl_regs.h>
32 #include <palacios/vmx_assist.h>
33 #include <palacios/vmm_halt.h>
35 #ifdef CONFIG_TELEMETRY
36 #include <palacios/vmm_telemetry.h>
41 /* At this point the GPRs are already copied into the guest_info state */
42 int v3_handle_vmx_exit(struct guest_info * info, struct vmx_exit_info * exit_info) {
43 struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
46 PrintError("Handling VMEXIT: %s (%u), %lu (0x%lx)\n",
47 v3_vmx_exit_code_to_str(exit_info->exit_reason),
48 exit_info->exit_reason,
49 exit_info->exit_qual, exit_info->exit_qual);
54 #ifdef CONFIG_TELEMETRY
55 if (info->vm_info->enable_telemetry) {
56 v3_telemetry_start_exit(info);
60 switch (exit_info->exit_reason) {
61 case VMEXIT_INFO_EXCEPTION_OR_NMI: {
62 pf_error_t error_code = *(pf_error_t *)&(exit_info->int_err);
65 // JRL: Change "0x0e" to a macro value
66 if ((uint8_t)exit_info->int_info == 0x0e) {
67 #ifdef CONFIG_DEBUG_SHADOW_PAGING
68 PrintDebug("Page Fault at %p error_code=%x\n", (void *)exit_info->exit_qual, *(uint32_t *)&error_code);
71 if (info->shdw_pg_mode == SHADOW_PAGING) {
72 if (v3_handle_shadow_pagefault(info, (addr_t)exit_info->exit_qual, error_code) == -1) {
73 PrintError("Error handling shadow page fault\n");
77 PrintError("Page fault in unimplemented paging mode\n");
81 PrintError("Unknown exception: 0x%x\n", (uint8_t)exit_info->int_info);
89 if (info->shdw_pg_mode == SHADOW_PAGING) {
90 if (v3_handle_shadow_invlpg(info) == -1) {
91 PrintError("Error handling INVLPG\n");
98 if (v3_handle_cpuid(info) == -1) {
99 PrintError("Error Handling CPUID instruction\n");
105 if (v3_handle_msr_read(info) == -1) {
106 PrintError("Error handling MSR Read\n");
112 if (v3_handle_msr_write(info) == -1) {
113 PrintError("Error handling MSR Write\n");
123 // VMCALL is a 3 byte op
124 // We do this early because some hypercalls can change the rip...
127 if (v3_handle_hypercall(info) == -1) {
131 case VMEXIT_IO_INSTR: {
132 struct vmx_exit_io_qual * io_qual = (struct vmx_exit_io_qual *)&(exit_info->exit_qual);
134 if (io_qual->dir == 0) {
135 if (io_qual->string) {
136 if (v3_handle_vmx_io_outs(info, exit_info) == -1) {
137 PrintError("Error in outs IO handler\n");
141 if (v3_handle_vmx_io_out(info, exit_info) == -1) {
142 PrintError("Error in out IO handler\n");
147 if (io_qual->string) {
148 if(v3_handle_vmx_io_ins(info, exit_info) == -1) {
149 PrintError("Error in ins IO handler\n");
153 if (v3_handle_vmx_io_in(info, exit_info) == -1) {
154 PrintError("Error in in IO handler\n");
161 case VMEXIT_CR_REG_ACCESSES: {
162 struct vmx_exit_cr_qual * cr_qual = (struct vmx_exit_cr_qual *)&(exit_info->exit_qual);
164 // PrintDebug("Control register: %d\n", cr_qual->access_type);
165 switch(cr_qual->cr_id) {
167 //PrintDebug("Handling CR0 Access\n");
168 if (v3_vmx_handle_cr0_access(info, cr_qual, exit_info) == -1) {
169 PrintError("Error in CR0 access handler\n");
174 //PrintDebug("Handling CR3 Access\n");
175 if (v3_vmx_handle_cr3_access(info, cr_qual) == -1) {
176 PrintError("Error in CR3 access handler\n");
181 PrintError("Unhandled CR access: %d\n", cr_qual->cr_id);
185 info->rip += exit_info->instr_len;
190 PrintDebug("Guest halted\n");
192 if (v3_handle_halt(info) == -1) {
193 PrintError("Error handling halt instruction\n");
203 case VMEXIT_EXTERNAL_INTR:
204 // Interrupts are handled outside switch
206 case VMEXIT_INTR_WINDOW:
208 vmcs_read(VMCS_PROC_CTRLS, &(vmx_info->pri_proc_ctrls.value));
209 vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
210 vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
212 #ifdef CONFIG_DEBUG_INTERRUPTS
213 PrintDebug("Interrupts available again! (RIP=%llx)\n", info->rip);
218 PrintError("Unhandled VMEXIT: %s (%u), %lu (0x%lx)\n",
219 v3_vmx_exit_code_to_str(exit_info->exit_reason),
220 exit_info->exit_reason,
221 exit_info->exit_qual, exit_info->exit_qual);
226 #ifdef CONFIG_TELEMETRY
227 if (info->vm_info->enable_telemetry) {
228 v3_telemetry_end_exit(info, exit_info->exit_reason);
236 static const char VMEXIT_INFO_EXCEPTION_OR_NMI_STR[] = "VMEXIT_INFO_EXCEPTION_OR_NMI";
237 static const char VMEXIT_EXTERNAL_INTR_STR[] = "VMEXIT_EXTERNAL_INTR";
238 static const char VMEXIT_TRIPLE_FAULT_STR[] = "VMEXIT_TRIPLE_FAULT";
239 static const char VMEXIT_INIT_SIGNAL_STR[] = "VMEXIT_INIT_SIGNAL";
240 static const char VMEXIT_STARTUP_IPI_STR[] = "VMEXIT_STARTUP_IPI";
241 static const char VMEXIT_IO_SMI_STR[] = "VMEXIT_IO_SMI";
242 static const char VMEXIT_OTHER_SMI_STR[] = "VMEXIT_OTHER_SMI";
243 static const char VMEXIT_INTR_WINDOW_STR[] = "VMEXIT_INTR_WINDOW";
244 static const char VMEXIT_NMI_WINDOW_STR[] = "VMEXIT_NMI_WINDOW";
245 static const char VMEXIT_TASK_SWITCH_STR[] = "VMEXIT_TASK_SWITCH";
246 static const char VMEXIT_CPUID_STR[] = "VMEXIT_CPUID";
247 static const char VMEXIT_HLT_STR[] = "VMEXIT_HLT";
248 static const char VMEXIT_INVD_STR[] = "VMEXIT_INVD";
249 static const char VMEXIT_INVLPG_STR[] = "VMEXIT_INVLPG";
250 static const char VMEXIT_RDPMC_STR[] = "VMEXIT_RDPMC";
251 static const char VMEXIT_RDTSC_STR[] = "VMEXIT_RDTSC";
252 static const char VMEXIT_RSM_STR[] = "VMEXIT_RSM";
253 static const char VMEXIT_VMCALL_STR[] = "VMEXIT_VMCALL";
254 static const char VMEXIT_VMCLEAR_STR[] = "VMEXIT_VMCLEAR";
255 static const char VMEXIT_VMLAUNCH_STR[] = "VMEXIT_VMLAUNCH";
256 static const char VMEXIT_VMPTRLD_STR[] = "VMEXIT_VMPTRLD";
257 static const char VMEXIT_VMPTRST_STR[] = "VMEXIT_VMPTRST";
258 static const char VMEXIT_VMREAD_STR[] = "VMEXIT_VMREAD";
259 static const char VMEXIT_VMRESUME_STR[] = "VMEXIT_VMRESUME";
260 static const char VMEXIT_VMWRITE_STR[] = "VMEXIT_VMWRITE";
261 static const char VMEXIT_VMXOFF_STR[] = "VMEXIT_VMXOFF";
262 static const char VMEXIT_VMXON_STR[] = "VMEXIT_VMXON";
263 static const char VMEXIT_CR_REG_ACCESSES_STR[] = "VMEXIT_CR_REG_ACCESSES";
264 static const char VMEXIT_MOV_DR_STR[] = "VMEXIT_MOV_DR";
265 static const char VMEXIT_IO_INSTR_STR[] = "VMEXIT_IO_INSTR";
266 static const char VMEXIT_RDMSR_STR[] = "VMEXIT_RDMSR";
267 static const char VMEXIT_WRMSR_STR[] = "VMEXIT_WRMSR";
268 static const char VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR[] = "VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE";
269 static const char VMEXIT_ENTRY_FAIL_MSR_LOAD_STR[] = "VMEXIT_ENTRY_FAIL_MSR_LOAD";
270 static const char VMEXIT_MWAIT_STR[] = "VMEXIT_MWAIT";
271 static const char VMEXIT_MONITOR_STR[] = "VMEXIT_MONITOR";
272 static const char VMEXIT_PAUSE_STR[] = "VMEXIT_PAUSE";
273 static const char VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR[] = "VMEXIT_ENTRY_FAILURE_MACHINE_CHECK";
274 static const char VMEXIT_TPR_BELOW_THRESHOLD_STR[] = "VMEXIT_TPR_BELOW_THRESHOLD";
275 static const char VMEXIT_APIC_STR[] = "VMEXIT_APIC";
276 static const char VMEXIT_GDTR_IDTR_STR[] = "VMEXIT_GDTR_IDTR";
277 static const char VMEXIT_LDTR_TR_STR[] = "VMEXIT_LDTR_TR";
278 static const char VMEXIT_EPT_VIOLATION_STR[] = "VMEXIT_EPT_VIOLATION";
279 static const char VMEXIT_EPT_CONFIG_STR[] = "VMEXIT_EPT_CONFIG";
280 static const char VMEXIT_INVEPT_STR[] = "VMEXIT_INVEPT";
281 static const char VMEXIT_RDTSCP_STR[] = "VMEXIT_RDTSCP";
282 static const char VMEXIT_EXPIRED_PREEMPT_TIMER_STR[] = "VMEXIT_EXPIRED_PREEMPT_TIMER";
283 static const char VMEXIT_INVVPID_STR[] = "VMEXIT_INVVPID";
284 static const char VMEXIT_WBINVD_STR[] = "VMEXIT_WBINVD";
285 static const char VMEXIT_XSETBV_STR[] = "VMEXIT_XSETBV";
287 const char * v3_vmx_exit_code_to_str(vmx_exit_t exit)
290 case VMEXIT_INFO_EXCEPTION_OR_NMI:
291 return VMEXIT_INFO_EXCEPTION_OR_NMI_STR;
292 case VMEXIT_EXTERNAL_INTR:
293 return VMEXIT_EXTERNAL_INTR_STR;
294 case VMEXIT_TRIPLE_FAULT:
295 return VMEXIT_TRIPLE_FAULT_STR;
296 case VMEXIT_INIT_SIGNAL:
297 return VMEXIT_INIT_SIGNAL_STR;
298 case VMEXIT_STARTUP_IPI:
299 return VMEXIT_STARTUP_IPI_STR;
301 return VMEXIT_IO_SMI_STR;
302 case VMEXIT_OTHER_SMI:
303 return VMEXIT_OTHER_SMI_STR;
304 case VMEXIT_INTR_WINDOW:
305 return VMEXIT_INTR_WINDOW_STR;
306 case VMEXIT_NMI_WINDOW:
307 return VMEXIT_NMI_WINDOW_STR;
308 case VMEXIT_TASK_SWITCH:
309 return VMEXIT_TASK_SWITCH_STR;
311 return VMEXIT_CPUID_STR;
313 return VMEXIT_HLT_STR;
315 return VMEXIT_INVD_STR;
317 return VMEXIT_INVLPG_STR;
319 return VMEXIT_RDPMC_STR;
321 return VMEXIT_RDTSC_STR;
323 return VMEXIT_RSM_STR;
325 return VMEXIT_VMCALL_STR;
327 return VMEXIT_VMCLEAR_STR;
328 case VMEXIT_VMLAUNCH:
329 return VMEXIT_VMLAUNCH_STR;
331 return VMEXIT_VMPTRLD_STR;
333 return VMEXIT_VMPTRST_STR;
335 return VMEXIT_VMREAD_STR;
336 case VMEXIT_VMRESUME:
337 return VMEXIT_VMRESUME_STR;
339 return VMEXIT_VMWRITE_STR;
341 return VMEXIT_VMXOFF_STR;
343 return VMEXIT_VMXON_STR;
344 case VMEXIT_CR_REG_ACCESSES:
345 return VMEXIT_CR_REG_ACCESSES_STR;
347 return VMEXIT_MOV_DR_STR;
348 case VMEXIT_IO_INSTR:
349 return VMEXIT_IO_INSTR_STR;
351 return VMEXIT_RDMSR_STR;
353 return VMEXIT_WRMSR_STR;
354 case VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE:
355 return VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR;
356 case VMEXIT_ENTRY_FAIL_MSR_LOAD:
357 return VMEXIT_ENTRY_FAIL_MSR_LOAD_STR;
359 return VMEXIT_MWAIT_STR;
361 return VMEXIT_MONITOR_STR;
363 return VMEXIT_PAUSE_STR;
364 case VMEXIT_ENTRY_FAILURE_MACHINE_CHECK:
365 return VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR;
366 case VMEXIT_TPR_BELOW_THRESHOLD:
367 return VMEXIT_TPR_BELOW_THRESHOLD_STR;
369 return VMEXIT_APIC_STR;
370 case VMEXIT_GDTR_IDTR:
371 return VMEXIT_GDTR_IDTR_STR;
373 return VMEXIT_LDTR_TR_STR;
374 case VMEXIT_EPT_VIOLATION:
375 return VMEXIT_EPT_VIOLATION_STR;
376 case VMEXIT_EPT_CONFIG:
377 return VMEXIT_EPT_CONFIG_STR;
379 return VMEXIT_INVEPT_STR;
381 return VMEXIT_RDTSCP_STR;
382 case VMEXIT_EXPIRED_PREEMPT_TIMER:
383 return VMEXIT_EXPIRED_PREEMPT_TIMER_STR;
385 return VMEXIT_INVVPID_STR;
387 return VMEXIT_WBINVD_STR;
389 return VMEXIT_XSETBV_STR;