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>
36 #include <palacios/vmm_vnet.h>
39 #ifdef CONFIG_LINUX_VIRTIO_NET
40 extern int v3_virtionic_pktprocess(struct guest_info * info);
43 #ifdef CONFIG_TELEMETRY
44 #include <palacios/vmm_telemetry.h>
47 //#define VNET_PROFILE
48 /* for vnet profiling*/
50 static uint64_t vmm_time = 0;
51 static uint64_t vnet_time = 0;
52 static uint64_t guest_time = 0;
53 static uint64_t last_exit_time = 0;
54 static uint64_t num_exit = 0;
58 /* At this point the GPRs are already copied into the guest_info state */
59 int v3_handle_vmx_exit(struct guest_info * info, struct vmx_exit_info * exit_info) {
60 struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
63 PrintError("Handling VMEXIT: %s (%u), %lu (0x%lx)\n",
64 v3_vmx_exit_code_to_str(exit_info->exit_reason),
65 exit_info->exit_reason,
66 exit_info->exit_qual, exit_info->exit_qual);
70 #ifdef CONFIG_TELEMETRY
71 if (info->enable_telemetry) {
72 v3_telemetry_start_exit(info);
77 uint64_t exit_start_time, vnet_start_time;
78 uint64_t exit_end_time, vnet_end_time;
79 rdtscll(exit_start_time);
81 if (last_exit_time > 0)
82 guest_time += exit_start_time - last_exit_time;
85 switch (exit_info->exit_reason) {
86 case VMEXIT_INFO_EXCEPTION_OR_NMI: {
87 pf_error_t error_code = *(pf_error_t *)&(exit_info->int_err);
90 // JRL: Change "0x0e" to a macro value
91 if ((uint8_t)exit_info->int_info == 0x0e) {
92 #ifdef CONFIG_DEBUG_SHADOW_PAGING
93 PrintDebug("Page Fault at %p error_code=%x\n", (void *)exit_info->exit_qual, *(uint32_t *)&error_code);
96 if (info->shdw_pg_mode == SHADOW_PAGING) {
97 if (v3_handle_shadow_pagefault(info, (addr_t)exit_info->exit_qual, error_code) == -1) {
98 PrintError("Error handling shadow page fault\n");
102 PrintError("Page fault in unimplemented paging mode\n");
106 PrintError("Unknown exception: 0x%x\n", (uint8_t)exit_info->int_info);
114 if (info->shdw_pg_mode == SHADOW_PAGING) {
115 if (v3_handle_shadow_invlpg(info) == -1) {
116 PrintError("Error handling INVLPG\n");
123 if (v3_handle_cpuid(info) == -1) {
124 PrintError("Error Handling CPUID instruction\n");
130 if (v3_handle_msr_read(info) == -1) {
131 PrintError("Error handling MSR Read\n");
137 if (v3_handle_msr_write(info) == -1) {
138 PrintError("Error handling MSR Write\n");
148 // VMCALL is a 3 byte op
149 // We do this early because some hypercalls can change the rip...
152 if (v3_handle_hypercall(info) == -1) {
156 case VMEXIT_IO_INSTR: {
157 struct vmx_exit_io_qual * io_qual = (struct vmx_exit_io_qual *)&(exit_info->exit_qual);
159 if (io_qual->dir == 0) {
160 if (io_qual->string) {
161 if (v3_handle_vmx_io_outs(info, exit_info) == -1) {
162 PrintError("Error in outs IO handler\n");
166 if (v3_handle_vmx_io_out(info, exit_info) == -1) {
167 PrintError("Error in out IO handler\n");
172 if (io_qual->string) {
173 if(v3_handle_vmx_io_ins(info, exit_info) == -1) {
174 PrintError("Error in ins IO handler\n");
178 if (v3_handle_vmx_io_in(info, exit_info) == -1) {
179 PrintError("Error in in IO handler\n");
186 case VMEXIT_CR_REG_ACCESSES: {
187 struct vmx_exit_cr_qual * cr_qual = (struct vmx_exit_cr_qual *)&(exit_info->exit_qual);
189 // PrintDebug("Control register: %d\n", cr_qual->access_type);
190 switch(cr_qual->cr_id) {
192 //PrintDebug("Handling CR0 Access\n");
193 if (v3_vmx_handle_cr0_access(info, cr_qual, exit_info) == -1) {
194 PrintError("Error in CR0 access handler\n");
199 //PrintDebug("Handling CR3 Access\n");
200 if (v3_vmx_handle_cr3_access(info, cr_qual) == -1) {
201 PrintError("Error in CR3 access handler\n");
206 PrintError("Unhandled CR access: %d\n", cr_qual->cr_id);
210 info->rip += exit_info->instr_len;
215 PrintDebug("Guest halted\n");
217 if (v3_handle_halt(info) == -1) {
218 PrintError("Error handling halt instruction\n");
228 case VMEXIT_EXTERNAL_INTR:
229 // Interrupts are handled outside switch
231 case VMEXIT_INTR_WINDOW:
233 vmcs_read(VMCS_PROC_CTRLS, &(vmx_info->pri_proc_ctrls.value));
234 vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
235 vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
237 #ifdef CONFIG_DEBUG_INTERRUPTS
238 PrintDebug("Interrupts available again! (RIP=%llx)\n", info->rip);
243 PrintError("Unhandled VMEXIT: %s (%u), %lu (0x%lx)\n",
244 v3_vmx_exit_code_to_str(exit_info->exit_reason),
245 exit_info->exit_reason,
246 exit_info->exit_qual, exit_info->exit_qual);
253 rdtscll(vnet_start_time);
255 v3_vnet_pkt_process(info);
257 rdtscll(vnet_end_time);
258 vnet_time += vnet_end_time - vnet_start_time;
262 #ifdef CONFIG_LINUX_VIRTIO_NET
263 v3_virtionic_pktprocess(info);
267 rdtscll(exit_end_time);
268 vmm_time += exit_end_time - exit_start_time;
269 last_exit_time = exit_end_time;
270 if ((num_exit % 100000) == 0) {
271 PrintError("exit: %ld, vmm_time: %ld, guest_time: %ld, vnet_time: %ld\n", (long)num_exit, (long)vmm_time, (long)guest_time, (long)vnet_time);
281 #ifdef CONFIG_TELEMETRY
282 if (info->enable_telemetry) {
283 v3_telemetry_end_exit(info, exit_info->exit_reason);
291 static const char VMEXIT_INFO_EXCEPTION_OR_NMI_STR[] = "VMEXIT_INFO_EXCEPTION_OR_NMI";
292 static const char VMEXIT_EXTERNAL_INTR_STR[] = "VMEXIT_EXTERNAL_INTR";
293 static const char VMEXIT_TRIPLE_FAULT_STR[] = "VMEXIT_TRIPLE_FAULT";
294 static const char VMEXIT_INIT_SIGNAL_STR[] = "VMEXIT_INIT_SIGNAL";
295 static const char VMEXIT_STARTUP_IPI_STR[] = "VMEXIT_STARTUP_IPI";
296 static const char VMEXIT_IO_SMI_STR[] = "VMEXIT_IO_SMI";
297 static const char VMEXIT_OTHER_SMI_STR[] = "VMEXIT_OTHER_SMI";
298 static const char VMEXIT_INTR_WINDOW_STR[] = "VMEXIT_INTR_WINDOW";
299 static const char VMEXIT_NMI_WINDOW_STR[] = "VMEXIT_NMI_WINDOW";
300 static const char VMEXIT_TASK_SWITCH_STR[] = "VMEXIT_TASK_SWITCH";
301 static const char VMEXIT_CPUID_STR[] = "VMEXIT_CPUID";
302 static const char VMEXIT_HLT_STR[] = "VMEXIT_HLT";
303 static const char VMEXIT_INVD_STR[] = "VMEXIT_INVD";
304 static const char VMEXIT_INVLPG_STR[] = "VMEXIT_INVLPG";
305 static const char VMEXIT_RDPMC_STR[] = "VMEXIT_RDPMC";
306 static const char VMEXIT_RDTSC_STR[] = "VMEXIT_RDTSC";
307 static const char VMEXIT_RSM_STR[] = "VMEXIT_RSM";
308 static const char VMEXIT_VMCALL_STR[] = "VMEXIT_VMCALL";
309 static const char VMEXIT_VMCLEAR_STR[] = "VMEXIT_VMCLEAR";
310 static const char VMEXIT_VMLAUNCH_STR[] = "VMEXIT_VMLAUNCH";
311 static const char VMEXIT_VMPTRLD_STR[] = "VMEXIT_VMPTRLD";
312 static const char VMEXIT_VMPTRST_STR[] = "VMEXIT_VMPTRST";
313 static const char VMEXIT_VMREAD_STR[] = "VMEXIT_VMREAD";
314 static const char VMEXIT_VMRESUME_STR[] = "VMEXIT_VMRESUME";
315 static const char VMEXIT_VMWRITE_STR[] = "VMEXIT_VMWRITE";
316 static const char VMEXIT_VMXOFF_STR[] = "VMEXIT_VMXOFF";
317 static const char VMEXIT_VMXON_STR[] = "VMEXIT_VMXON";
318 static const char VMEXIT_CR_REG_ACCESSES_STR[] = "VMEXIT_CR_REG_ACCESSES";
319 static const char VMEXIT_MOV_DR_STR[] = "VMEXIT_MOV_DR";
320 static const char VMEXIT_IO_INSTR_STR[] = "VMEXIT_IO_INSTR";
321 static const char VMEXIT_RDMSR_STR[] = "VMEXIT_RDMSR";
322 static const char VMEXIT_WRMSR_STR[] = "VMEXIT_WRMSR";
323 static const char VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR[] = "VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE";
324 static const char VMEXIT_ENTRY_FAIL_MSR_LOAD_STR[] = "VMEXIT_ENTRY_FAIL_MSR_LOAD";
325 static const char VMEXIT_MWAIT_STR[] = "VMEXIT_MWAIT";
326 static const char VMEXIT_MONITOR_STR[] = "VMEXIT_MONITOR";
327 static const char VMEXIT_PAUSE_STR[] = "VMEXIT_PAUSE";
328 static const char VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR[] = "VMEXIT_ENTRY_FAILURE_MACHINE_CHECK";
329 static const char VMEXIT_TPR_BELOW_THRESHOLD_STR[] = "VMEXIT_TPR_BELOW_THRESHOLD";
330 static const char VMEXIT_APIC_STR[] = "VMEXIT_APIC";
331 static const char VMEXIT_GDTR_IDTR_STR[] = "VMEXIT_GDTR_IDTR";
332 static const char VMEXIT_LDTR_TR_STR[] = "VMEXIT_LDTR_TR";
333 static const char VMEXIT_EPT_VIOLATION_STR[] = "VMEXIT_EPT_VIOLATION";
334 static const char VMEXIT_EPT_CONFIG_STR[] = "VMEXIT_EPT_CONFIG";
335 static const char VMEXIT_INVEPT_STR[] = "VMEXIT_INVEPT";
336 static const char VMEXIT_RDTSCP_STR[] = "VMEXIT_RDTSCP";
337 static const char VMEXIT_EXPIRED_PREEMPT_TIMER_STR[] = "VMEXIT_EXPIRED_PREEMPT_TIMER";
338 static const char VMEXIT_INVVPID_STR[] = "VMEXIT_INVVPID";
339 static const char VMEXIT_WBINVD_STR[] = "VMEXIT_WBINVD";
340 static const char VMEXIT_XSETBV_STR[] = "VMEXIT_XSETBV";
342 const char * v3_vmx_exit_code_to_str(vmx_exit_t exit)
345 case VMEXIT_INFO_EXCEPTION_OR_NMI:
346 return VMEXIT_INFO_EXCEPTION_OR_NMI_STR;
347 case VMEXIT_EXTERNAL_INTR:
348 return VMEXIT_EXTERNAL_INTR_STR;
349 case VMEXIT_TRIPLE_FAULT:
350 return VMEXIT_TRIPLE_FAULT_STR;
351 case VMEXIT_INIT_SIGNAL:
352 return VMEXIT_INIT_SIGNAL_STR;
353 case VMEXIT_STARTUP_IPI:
354 return VMEXIT_STARTUP_IPI_STR;
356 return VMEXIT_IO_SMI_STR;
357 case VMEXIT_OTHER_SMI:
358 return VMEXIT_OTHER_SMI_STR;
359 case VMEXIT_INTR_WINDOW:
360 return VMEXIT_INTR_WINDOW_STR;
361 case VMEXIT_NMI_WINDOW:
362 return VMEXIT_NMI_WINDOW_STR;
363 case VMEXIT_TASK_SWITCH:
364 return VMEXIT_TASK_SWITCH_STR;
366 return VMEXIT_CPUID_STR;
368 return VMEXIT_HLT_STR;
370 return VMEXIT_INVD_STR;
372 return VMEXIT_INVLPG_STR;
374 return VMEXIT_RDPMC_STR;
376 return VMEXIT_RDTSC_STR;
378 return VMEXIT_RSM_STR;
380 return VMEXIT_VMCALL_STR;
382 return VMEXIT_VMCLEAR_STR;
383 case VMEXIT_VMLAUNCH:
384 return VMEXIT_VMLAUNCH_STR;
386 return VMEXIT_VMPTRLD_STR;
388 return VMEXIT_VMPTRST_STR;
390 return VMEXIT_VMREAD_STR;
391 case VMEXIT_VMRESUME:
392 return VMEXIT_VMRESUME_STR;
394 return VMEXIT_VMWRITE_STR;
396 return VMEXIT_VMXOFF_STR;
398 return VMEXIT_VMXON_STR;
399 case VMEXIT_CR_REG_ACCESSES:
400 return VMEXIT_CR_REG_ACCESSES_STR;
402 return VMEXIT_MOV_DR_STR;
403 case VMEXIT_IO_INSTR:
404 return VMEXIT_IO_INSTR_STR;
406 return VMEXIT_RDMSR_STR;
408 return VMEXIT_WRMSR_STR;
409 case VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE:
410 return VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR;
411 case VMEXIT_ENTRY_FAIL_MSR_LOAD:
412 return VMEXIT_ENTRY_FAIL_MSR_LOAD_STR;
414 return VMEXIT_MWAIT_STR;
416 return VMEXIT_MONITOR_STR;
418 return VMEXIT_PAUSE_STR;
419 case VMEXIT_ENTRY_FAILURE_MACHINE_CHECK:
420 return VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR;
421 case VMEXIT_TPR_BELOW_THRESHOLD:
422 return VMEXIT_TPR_BELOW_THRESHOLD_STR;
424 return VMEXIT_APIC_STR;
425 case VMEXIT_GDTR_IDTR:
426 return VMEXIT_GDTR_IDTR_STR;
428 return VMEXIT_LDTR_TR_STR;
429 case VMEXIT_EPT_VIOLATION:
430 return VMEXIT_EPT_VIOLATION_STR;
431 case VMEXIT_EPT_CONFIG:
432 return VMEXIT_EPT_CONFIG_STR;
434 return VMEXIT_INVEPT_STR;
436 return VMEXIT_RDTSCP_STR;
437 case VMEXIT_EXPIRED_PREEMPT_TIMER:
438 return VMEXIT_EXPIRED_PREEMPT_TIMER_STR;
440 return VMEXIT_INVVPID_STR;
442 return VMEXIT_WBINVD_STR;
444 return VMEXIT_XSETBV_STR;