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 /* At this point the GPRs are already copied into the guest_info state */
48 int v3_handle_vmx_exit(struct guest_info * info, struct vmx_exit_info * exit_info) {
49 struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
52 PrintError("Handling VMEXIT: %s (%u), %lu (0x%lx)\n",
53 v3_vmx_exit_code_to_str(exit_info->exit_reason),
54 exit_info->exit_reason,
55 exit_info->exit_qual, exit_info->exit_qual);
59 #ifdef CONFIG_TELEMETRY
60 if (info->enable_telemetry) {
61 v3_telemetry_start_exit(info);
66 uint64_t exit_start_time, vnet_start_time;
67 uint64_t exit_end_time, vnet_end_time;
68 rdtscll(exit_start_time);
70 if (last_exit_time > 0)
71 guest_time += exit_start_time - last_exit_time;
74 switch (exit_info->exit_reason) {
75 case VMEXIT_INFO_EXCEPTION_OR_NMI: {
76 pf_error_t error_code = *(pf_error_t *)&(exit_info->int_err);
78 // JRL: Change "0x0e" to a macro value
79 if ((uint8_t)exit_info->int_info == 0x0e) {
80 #ifdef CONFIG_DEBUG_SHADOW_PAGING
81 PrintDebug("Page Fault at %p error_code=%x\n", (void *)exit_info->exit_qual, *(uint32_t *)&error_code);
84 if (info->shdw_pg_mode == SHADOW_PAGING) {
85 if (v3_handle_shadow_pagefault(info, (addr_t)exit_info->exit_qual, error_code) == -1) {
86 PrintError("Error handling shadow page fault\n");
90 PrintError("Page fault in unimplemented paging mode\n");
94 PrintError("Unknown exception: 0x%x\n", (uint8_t)exit_info->int_info);
102 if (info->shdw_pg_mode == SHADOW_PAGING) {
103 if (v3_handle_shadow_invlpg(info) == -1) {
104 PrintError("Error handling INVLPG\n");
111 if (v3_handle_cpuid(info) == -1) {
112 PrintError("Error Handling CPUID instruction\n");
118 if (v3_handle_msr_read(info) == -1) {
119 PrintError("Error handling MSR Read\n");
125 if (v3_handle_msr_write(info) == -1) {
126 PrintError("Error handling MSR Write\n");
136 // VMCALL is a 3 byte op
137 // We do this early because some hypercalls can change the rip...
140 if (v3_handle_hypercall(info) == -1) {
144 case VMEXIT_IO_INSTR: {
145 struct vmx_exit_io_qual * io_qual = (struct vmx_exit_io_qual *)&(exit_info->exit_qual);
147 if (io_qual->dir == 0) {
148 if (io_qual->string) {
149 if (v3_handle_vmx_io_outs(info, exit_info) == -1) {
150 PrintError("Error in outs IO handler\n");
154 if (v3_handle_vmx_io_out(info, exit_info) == -1) {
155 PrintError("Error in out IO handler\n");
160 if (io_qual->string) {
161 if(v3_handle_vmx_io_ins(info, exit_info) == -1) {
162 PrintError("Error in ins IO handler\n");
166 if (v3_handle_vmx_io_in(info, exit_info) == -1) {
167 PrintError("Error in in IO handler\n");
174 case VMEXIT_CR_REG_ACCESSES: {
175 struct vmx_exit_cr_qual * cr_qual = (struct vmx_exit_cr_qual *)&(exit_info->exit_qual);
177 // PrintDebug("Control register: %d\n", cr_qual->access_type);
178 switch(cr_qual->cr_id) {
180 //PrintDebug("Handling CR0 Access\n");
181 if (v3_vmx_handle_cr0_access(info, cr_qual, exit_info) == -1) {
182 PrintError("Error in CR0 access handler\n");
187 //PrintDebug("Handling CR3 Access\n");
188 if (v3_vmx_handle_cr3_access(info, cr_qual) == -1) {
189 PrintError("Error in CR3 access handler\n");
194 PrintError("Unhandled CR access: %d\n", cr_qual->cr_id);
198 info->rip += exit_info->instr_len;
203 PrintDebug("Guest halted\n");
205 if (v3_handle_halt(info) == -1) {
206 PrintError("Error handling halt instruction\n");
216 case VMEXIT_EXTERNAL_INTR:
217 // Interrupts are handled outside switch
219 case VMEXIT_INTR_WINDOW:
221 vmcs_read(VMCS_PROC_CTRLS, &(vmx_info->pri_proc_ctrls.value));
222 vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
223 vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
225 #ifdef CONFIG_DEBUG_INTERRUPTS
226 PrintDebug("Interrupts available again! (RIP=%llx)\n", info->rip);
231 PrintError("Unhandled VMEXIT: %s (%u), %lu (0x%lx)\n",
232 v3_vmx_exit_code_to_str(exit_info->exit_reason),
233 exit_info->exit_reason,
234 exit_info->exit_qual, exit_info->exit_qual);
240 v3_vnet_pkt_process(info);
243 #ifdef CONFIG_LINUX_VIRTIO_NET
244 v3_virtionic_pktprocess(info);
247 #ifdef CONFIG_TELEMETRY
248 if (info->enable_telemetry) {
249 v3_telemetry_end_exit(info, exit_info->exit_reason);
257 static const char VMEXIT_INFO_EXCEPTION_OR_NMI_STR[] = "VMEXIT_INFO_EXCEPTION_OR_NMI";
258 static const char VMEXIT_EXTERNAL_INTR_STR[] = "VMEXIT_EXTERNAL_INTR";
259 static const char VMEXIT_TRIPLE_FAULT_STR[] = "VMEXIT_TRIPLE_FAULT";
260 static const char VMEXIT_INIT_SIGNAL_STR[] = "VMEXIT_INIT_SIGNAL";
261 static const char VMEXIT_STARTUP_IPI_STR[] = "VMEXIT_STARTUP_IPI";
262 static const char VMEXIT_IO_SMI_STR[] = "VMEXIT_IO_SMI";
263 static const char VMEXIT_OTHER_SMI_STR[] = "VMEXIT_OTHER_SMI";
264 static const char VMEXIT_INTR_WINDOW_STR[] = "VMEXIT_INTR_WINDOW";
265 static const char VMEXIT_NMI_WINDOW_STR[] = "VMEXIT_NMI_WINDOW";
266 static const char VMEXIT_TASK_SWITCH_STR[] = "VMEXIT_TASK_SWITCH";
267 static const char VMEXIT_CPUID_STR[] = "VMEXIT_CPUID";
268 static const char VMEXIT_HLT_STR[] = "VMEXIT_HLT";
269 static const char VMEXIT_INVD_STR[] = "VMEXIT_INVD";
270 static const char VMEXIT_INVLPG_STR[] = "VMEXIT_INVLPG";
271 static const char VMEXIT_RDPMC_STR[] = "VMEXIT_RDPMC";
272 static const char VMEXIT_RDTSC_STR[] = "VMEXIT_RDTSC";
273 static const char VMEXIT_RSM_STR[] = "VMEXIT_RSM";
274 static const char VMEXIT_VMCALL_STR[] = "VMEXIT_VMCALL";
275 static const char VMEXIT_VMCLEAR_STR[] = "VMEXIT_VMCLEAR";
276 static const char VMEXIT_VMLAUNCH_STR[] = "VMEXIT_VMLAUNCH";
277 static const char VMEXIT_VMPTRLD_STR[] = "VMEXIT_VMPTRLD";
278 static const char VMEXIT_VMPTRST_STR[] = "VMEXIT_VMPTRST";
279 static const char VMEXIT_VMREAD_STR[] = "VMEXIT_VMREAD";
280 static const char VMEXIT_VMRESUME_STR[] = "VMEXIT_VMRESUME";
281 static const char VMEXIT_VMWRITE_STR[] = "VMEXIT_VMWRITE";
282 static const char VMEXIT_VMXOFF_STR[] = "VMEXIT_VMXOFF";
283 static const char VMEXIT_VMXON_STR[] = "VMEXIT_VMXON";
284 static const char VMEXIT_CR_REG_ACCESSES_STR[] = "VMEXIT_CR_REG_ACCESSES";
285 static const char VMEXIT_MOV_DR_STR[] = "VMEXIT_MOV_DR";
286 static const char VMEXIT_IO_INSTR_STR[] = "VMEXIT_IO_INSTR";
287 static const char VMEXIT_RDMSR_STR[] = "VMEXIT_RDMSR";
288 static const char VMEXIT_WRMSR_STR[] = "VMEXIT_WRMSR";
289 static const char VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR[] = "VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE";
290 static const char VMEXIT_ENTRY_FAIL_MSR_LOAD_STR[] = "VMEXIT_ENTRY_FAIL_MSR_LOAD";
291 static const char VMEXIT_MWAIT_STR[] = "VMEXIT_MWAIT";
292 static const char VMEXIT_MONITOR_STR[] = "VMEXIT_MONITOR";
293 static const char VMEXIT_PAUSE_STR[] = "VMEXIT_PAUSE";
294 static const char VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR[] = "VMEXIT_ENTRY_FAILURE_MACHINE_CHECK";
295 static const char VMEXIT_TPR_BELOW_THRESHOLD_STR[] = "VMEXIT_TPR_BELOW_THRESHOLD";
296 static const char VMEXIT_APIC_STR[] = "VMEXIT_APIC";
297 static const char VMEXIT_GDTR_IDTR_STR[] = "VMEXIT_GDTR_IDTR";
298 static const char VMEXIT_LDTR_TR_STR[] = "VMEXIT_LDTR_TR";
299 static const char VMEXIT_EPT_VIOLATION_STR[] = "VMEXIT_EPT_VIOLATION";
300 static const char VMEXIT_EPT_CONFIG_STR[] = "VMEXIT_EPT_CONFIG";
301 static const char VMEXIT_INVEPT_STR[] = "VMEXIT_INVEPT";
302 static const char VMEXIT_RDTSCP_STR[] = "VMEXIT_RDTSCP";
303 static const char VMEXIT_EXPIRED_PREEMPT_TIMER_STR[] = "VMEXIT_EXPIRED_PREEMPT_TIMER";
304 static const char VMEXIT_INVVPID_STR[] = "VMEXIT_INVVPID";
305 static const char VMEXIT_WBINVD_STR[] = "VMEXIT_WBINVD";
306 static const char VMEXIT_XSETBV_STR[] = "VMEXIT_XSETBV";
308 const char * v3_vmx_exit_code_to_str(vmx_exit_t exit)
311 case VMEXIT_INFO_EXCEPTION_OR_NMI:
312 return VMEXIT_INFO_EXCEPTION_OR_NMI_STR;
313 case VMEXIT_EXTERNAL_INTR:
314 return VMEXIT_EXTERNAL_INTR_STR;
315 case VMEXIT_TRIPLE_FAULT:
316 return VMEXIT_TRIPLE_FAULT_STR;
317 case VMEXIT_INIT_SIGNAL:
318 return VMEXIT_INIT_SIGNAL_STR;
319 case VMEXIT_STARTUP_IPI:
320 return VMEXIT_STARTUP_IPI_STR;
322 return VMEXIT_IO_SMI_STR;
323 case VMEXIT_OTHER_SMI:
324 return VMEXIT_OTHER_SMI_STR;
325 case VMEXIT_INTR_WINDOW:
326 return VMEXIT_INTR_WINDOW_STR;
327 case VMEXIT_NMI_WINDOW:
328 return VMEXIT_NMI_WINDOW_STR;
329 case VMEXIT_TASK_SWITCH:
330 return VMEXIT_TASK_SWITCH_STR;
332 return VMEXIT_CPUID_STR;
334 return VMEXIT_HLT_STR;
336 return VMEXIT_INVD_STR;
338 return VMEXIT_INVLPG_STR;
340 return VMEXIT_RDPMC_STR;
342 return VMEXIT_RDTSC_STR;
344 return VMEXIT_RSM_STR;
346 return VMEXIT_VMCALL_STR;
348 return VMEXIT_VMCLEAR_STR;
349 case VMEXIT_VMLAUNCH:
350 return VMEXIT_VMLAUNCH_STR;
352 return VMEXIT_VMPTRLD_STR;
354 return VMEXIT_VMPTRST_STR;
356 return VMEXIT_VMREAD_STR;
357 case VMEXIT_VMRESUME:
358 return VMEXIT_VMRESUME_STR;
360 return VMEXIT_VMWRITE_STR;
362 return VMEXIT_VMXOFF_STR;
364 return VMEXIT_VMXON_STR;
365 case VMEXIT_CR_REG_ACCESSES:
366 return VMEXIT_CR_REG_ACCESSES_STR;
368 return VMEXIT_MOV_DR_STR;
369 case VMEXIT_IO_INSTR:
370 return VMEXIT_IO_INSTR_STR;
372 return VMEXIT_RDMSR_STR;
374 return VMEXIT_WRMSR_STR;
375 case VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE:
376 return VMEXIT_ENTRY_FAIL_INVALID_GUEST_STATE_STR;
377 case VMEXIT_ENTRY_FAIL_MSR_LOAD:
378 return VMEXIT_ENTRY_FAIL_MSR_LOAD_STR;
380 return VMEXIT_MWAIT_STR;
382 return VMEXIT_MONITOR_STR;
384 return VMEXIT_PAUSE_STR;
385 case VMEXIT_ENTRY_FAILURE_MACHINE_CHECK:
386 return VMEXIT_ENTRY_FAILURE_MACHINE_CHECK_STR;
387 case VMEXIT_TPR_BELOW_THRESHOLD:
388 return VMEXIT_TPR_BELOW_THRESHOLD_STR;
390 return VMEXIT_APIC_STR;
391 case VMEXIT_GDTR_IDTR:
392 return VMEXIT_GDTR_IDTR_STR;
394 return VMEXIT_LDTR_TR_STR;
395 case VMEXIT_EPT_VIOLATION:
396 return VMEXIT_EPT_VIOLATION_STR;
397 case VMEXIT_EPT_CONFIG:
398 return VMEXIT_EPT_CONFIG_STR;
400 return VMEXIT_INVEPT_STR;
402 return VMEXIT_RDTSCP_STR;
403 case VMEXIT_EXPIRED_PREEMPT_TIMER:
404 return VMEXIT_EXPIRED_PREEMPT_TIMER_STR;
406 return VMEXIT_INVVPID_STR;
408 return VMEXIT_WBINVD_STR;
410 return VMEXIT_XSETBV_STR;