1 /*
2 * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, see <http://www.gnu.org/licenses>
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <stdint.h>
24
25 #include "event-parse.h"
26
27 #ifdef HAVE_UDIS86
28
29 #include <udis86.h>
30
31 static ud_t ud;
32
init_disassembler(void)33 static void init_disassembler(void)
34 {
35 ud_init(&ud);
36 ud_set_syntax(&ud, UD_SYN_ATT);
37 }
38
disassemble(unsigned char * insn,int len,uint64_t rip,int cr0_pe,int eflags_vm,int cs_d,int cs_l)39 static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
40 int cr0_pe, int eflags_vm,
41 int cs_d, int cs_l)
42 {
43 int mode;
44
45 if (!cr0_pe)
46 mode = 16;
47 else if (eflags_vm)
48 mode = 16;
49 else if (cs_l)
50 mode = 64;
51 else if (cs_d)
52 mode = 32;
53 else
54 mode = 16;
55
56 ud_set_pc(&ud, rip);
57 ud_set_mode(&ud, mode);
58 ud_set_input_buffer(&ud, insn, len);
59 ud_disassemble(&ud);
60 return ud_insn_asm(&ud);
61 }
62
63 #else
64
init_disassembler(void)65 static void init_disassembler(void)
66 {
67 }
68
disassemble(unsigned char * insn,int len,uint64_t rip,int cr0_pe,int eflags_vm,int cs_d,int cs_l)69 static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
70 int cr0_pe, int eflags_vm,
71 int cs_d, int cs_l)
72 {
73 static char out[15*3+1];
74 int i;
75
76 for (i = 0; i < len; ++i)
77 sprintf(out + i * 3, "%02x ", insn[i]);
78 out[len*3-1] = '\0';
79 return out;
80 }
81
82 #endif
83
84
85 #define VMX_EXIT_REASONS \
86 _ER(EXCEPTION_NMI, 0) \
87 _ER(EXTERNAL_INTERRUPT, 1) \
88 _ER(TRIPLE_FAULT, 2) \
89 _ER(PENDING_INTERRUPT, 7) \
90 _ER(NMI_WINDOW, 8) \
91 _ER(TASK_SWITCH, 9) \
92 _ER(CPUID, 10) \
93 _ER(HLT, 12) \
94 _ER(INVD, 13) \
95 _ER(INVLPG, 14) \
96 _ER(RDPMC, 15) \
97 _ER(RDTSC, 16) \
98 _ER(VMCALL, 18) \
99 _ER(VMCLEAR, 19) \
100 _ER(VMLAUNCH, 20) \
101 _ER(VMPTRLD, 21) \
102 _ER(VMPTRST, 22) \
103 _ER(VMREAD, 23) \
104 _ER(VMRESUME, 24) \
105 _ER(VMWRITE, 25) \
106 _ER(VMOFF, 26) \
107 _ER(VMON, 27) \
108 _ER(CR_ACCESS, 28) \
109 _ER(DR_ACCESS, 29) \
110 _ER(IO_INSTRUCTION, 30) \
111 _ER(MSR_READ, 31) \
112 _ER(MSR_WRITE, 32) \
113 _ER(MWAIT_INSTRUCTION, 36) \
114 _ER(MONITOR_INSTRUCTION, 39) \
115 _ER(PAUSE_INSTRUCTION, 40) \
116 _ER(MCE_DURING_VMENTRY, 41) \
117 _ER(TPR_BELOW_THRESHOLD, 43) \
118 _ER(APIC_ACCESS, 44) \
119 _ER(EOI_INDUCED, 45) \
120 _ER(EPT_VIOLATION, 48) \
121 _ER(EPT_MISCONFIG, 49) \
122 _ER(INVEPT, 50) \
123 _ER(PREEMPTION_TIMER, 52) \
124 _ER(WBINVD, 54) \
125 _ER(XSETBV, 55) \
126 _ER(APIC_WRITE, 56) \
127 _ER(INVPCID, 58) \
128 _ER(PML_FULL, 62) \
129 _ER(XSAVES, 63) \
130 _ER(XRSTORS, 64)
131
132 #define SVM_EXIT_REASONS \
133 _ER(EXIT_READ_CR0, 0x000) \
134 _ER(EXIT_READ_CR3, 0x003) \
135 _ER(EXIT_READ_CR4, 0x004) \
136 _ER(EXIT_READ_CR8, 0x008) \
137 _ER(EXIT_WRITE_CR0, 0x010) \
138 _ER(EXIT_WRITE_CR3, 0x013) \
139 _ER(EXIT_WRITE_CR4, 0x014) \
140 _ER(EXIT_WRITE_CR8, 0x018) \
141 _ER(EXIT_READ_DR0, 0x020) \
142 _ER(EXIT_READ_DR1, 0x021) \
143 _ER(EXIT_READ_DR2, 0x022) \
144 _ER(EXIT_READ_DR3, 0x023) \
145 _ER(EXIT_READ_DR4, 0x024) \
146 _ER(EXIT_READ_DR5, 0x025) \
147 _ER(EXIT_READ_DR6, 0x026) \
148 _ER(EXIT_READ_DR7, 0x027) \
149 _ER(EXIT_WRITE_DR0, 0x030) \
150 _ER(EXIT_WRITE_DR1, 0x031) \
151 _ER(EXIT_WRITE_DR2, 0x032) \
152 _ER(EXIT_WRITE_DR3, 0x033) \
153 _ER(EXIT_WRITE_DR4, 0x034) \
154 _ER(EXIT_WRITE_DR5, 0x035) \
155 _ER(EXIT_WRITE_DR6, 0x036) \
156 _ER(EXIT_WRITE_DR7, 0x037) \
157 _ER(EXIT_EXCP_BASE, 0x040) \
158 _ER(EXIT_INTR, 0x060) \
159 _ER(EXIT_NMI, 0x061) \
160 _ER(EXIT_SMI, 0x062) \
161 _ER(EXIT_INIT, 0x063) \
162 _ER(EXIT_VINTR, 0x064) \
163 _ER(EXIT_CR0_SEL_WRITE, 0x065) \
164 _ER(EXIT_IDTR_READ, 0x066) \
165 _ER(EXIT_GDTR_READ, 0x067) \
166 _ER(EXIT_LDTR_READ, 0x068) \
167 _ER(EXIT_TR_READ, 0x069) \
168 _ER(EXIT_IDTR_WRITE, 0x06a) \
169 _ER(EXIT_GDTR_WRITE, 0x06b) \
170 _ER(EXIT_LDTR_WRITE, 0x06c) \
171 _ER(EXIT_TR_WRITE, 0x06d) \
172 _ER(EXIT_RDTSC, 0x06e) \
173 _ER(EXIT_RDPMC, 0x06f) \
174 _ER(EXIT_PUSHF, 0x070) \
175 _ER(EXIT_POPF, 0x071) \
176 _ER(EXIT_CPUID, 0x072) \
177 _ER(EXIT_RSM, 0x073) \
178 _ER(EXIT_IRET, 0x074) \
179 _ER(EXIT_SWINT, 0x075) \
180 _ER(EXIT_INVD, 0x076) \
181 _ER(EXIT_PAUSE, 0x077) \
182 _ER(EXIT_HLT, 0x078) \
183 _ER(EXIT_INVLPG, 0x079) \
184 _ER(EXIT_INVLPGA, 0x07a) \
185 _ER(EXIT_IOIO, 0x07b) \
186 _ER(EXIT_MSR, 0x07c) \
187 _ER(EXIT_TASK_SWITCH, 0x07d) \
188 _ER(EXIT_FERR_FREEZE, 0x07e) \
189 _ER(EXIT_SHUTDOWN, 0x07f) \
190 _ER(EXIT_VMRUN, 0x080) \
191 _ER(EXIT_VMMCALL, 0x081) \
192 _ER(EXIT_VMLOAD, 0x082) \
193 _ER(EXIT_VMSAVE, 0x083) \
194 _ER(EXIT_STGI, 0x084) \
195 _ER(EXIT_CLGI, 0x085) \
196 _ER(EXIT_SKINIT, 0x086) \
197 _ER(EXIT_RDTSCP, 0x087) \
198 _ER(EXIT_ICEBP, 0x088) \
199 _ER(EXIT_WBINVD, 0x089) \
200 _ER(EXIT_MONITOR, 0x08a) \
201 _ER(EXIT_MWAIT, 0x08b) \
202 _ER(EXIT_MWAIT_COND, 0x08c) \
203 _ER(EXIT_NPF, 0x400) \
204 _ER(EXIT_ERR, -1)
205
206 #define _ER(reason, val) { #reason, val },
207 struct str_values {
208 const char *str;
209 int val;
210 };
211
212 static struct str_values vmx_exit_reasons[] = {
213 VMX_EXIT_REASONS
214 { NULL, -1}
215 };
216
217 static struct str_values svm_exit_reasons[] = {
218 SVM_EXIT_REASONS
219 { NULL, -1}
220 };
221
222 static struct isa_exit_reasons {
223 unsigned isa;
224 struct str_values *strings;
225 } isa_exit_reasons[] = {
226 { .isa = 1, .strings = vmx_exit_reasons },
227 { .isa = 2, .strings = svm_exit_reasons },
228 { }
229 };
230
find_exit_reason(unsigned isa,int val)231 static const char *find_exit_reason(unsigned isa, int val)
232 {
233 struct str_values *strings = NULL;
234 int i;
235
236 for (i = 0; isa_exit_reasons[i].strings; ++i)
237 if (isa_exit_reasons[i].isa == isa) {
238 strings = isa_exit_reasons[i].strings;
239 break;
240 }
241 if (!strings)
242 return "UNKNOWN-ISA";
243 for (i = 0; strings[i].val >= 0; i++)
244 if (strings[i].val == val)
245 break;
246
247 return strings[i].str;
248 }
249
print_exit_reason(struct trace_seq * s,struct tep_record * record,struct event_format * event,const char * field)250 static int print_exit_reason(struct trace_seq *s, struct tep_record *record,
251 struct event_format *event, const char *field)
252 {
253 unsigned long long isa;
254 unsigned long long val;
255 const char *reason;
256
257 if (tep_get_field_val(s, event, field, record, &val, 1) < 0)
258 return -1;
259
260 if (tep_get_field_val(s, event, "isa", record, &isa, 0) < 0)
261 isa = 1;
262
263 reason = find_exit_reason(isa, val);
264 if (reason)
265 trace_seq_printf(s, "reason %s", reason);
266 else
267 trace_seq_printf(s, "reason UNKNOWN (%llu)", val);
268 return 0;
269 }
270
kvm_exit_handler(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)271 static int kvm_exit_handler(struct trace_seq *s, struct tep_record *record,
272 struct event_format *event, void *context)
273 {
274 unsigned long long info1 = 0, info2 = 0;
275
276 if (print_exit_reason(s, record, event, "exit_reason") < 0)
277 return -1;
278
279 tep_print_num_field(s, " rip 0x%lx", event, "guest_rip", record, 1);
280
281 if (tep_get_field_val(s, event, "info1", record, &info1, 0) >= 0
282 && tep_get_field_val(s, event, "info2", record, &info2, 0) >= 0)
283 trace_seq_printf(s, " info %llx %llx", info1, info2);
284
285 return 0;
286 }
287
288 #define KVM_EMUL_INSN_F_CR0_PE (1 << 0)
289 #define KVM_EMUL_INSN_F_EFL_VM (1 << 1)
290 #define KVM_EMUL_INSN_F_CS_D (1 << 2)
291 #define KVM_EMUL_INSN_F_CS_L (1 << 3)
292
kvm_emulate_insn_handler(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)293 static int kvm_emulate_insn_handler(struct trace_seq *s,
294 struct tep_record *record,
295 struct event_format *event, void *context)
296 {
297 unsigned long long rip, csbase, len, flags, failed;
298 int llen;
299 uint8_t *insn;
300 const char *disasm;
301
302 if (tep_get_field_val(s, event, "rip", record, &rip, 1) < 0)
303 return -1;
304
305 if (tep_get_field_val(s, event, "csbase", record, &csbase, 1) < 0)
306 return -1;
307
308 if (tep_get_field_val(s, event, "len", record, &len, 1) < 0)
309 return -1;
310
311 if (tep_get_field_val(s, event, "flags", record, &flags, 1) < 0)
312 return -1;
313
314 if (tep_get_field_val(s, event, "failed", record, &failed, 1) < 0)
315 return -1;
316
317 insn = tep_get_field_raw(s, event, "insn", record, &llen, 1);
318 if (!insn)
319 return -1;
320
321 disasm = disassemble(insn, len, rip,
322 flags & KVM_EMUL_INSN_F_CR0_PE,
323 flags & KVM_EMUL_INSN_F_EFL_VM,
324 flags & KVM_EMUL_INSN_F_CS_D,
325 flags & KVM_EMUL_INSN_F_CS_L);
326
327 trace_seq_printf(s, "%llx:%llx: %s%s", csbase, rip, disasm,
328 failed ? " FAIL" : "");
329 return 0;
330 }
331
332
kvm_nested_vmexit_inject_handler(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)333 static int kvm_nested_vmexit_inject_handler(struct trace_seq *s, struct tep_record *record,
334 struct event_format *event, void *context)
335 {
336 if (print_exit_reason(s, record, event, "exit_code") < 0)
337 return -1;
338
339 tep_print_num_field(s, " info1 %llx", event, "exit_info1", record, 1);
340 tep_print_num_field(s, " info2 %llx", event, "exit_info2", record, 1);
341 tep_print_num_field(s, " int_info %llx", event, "exit_int_info", record, 1);
342 tep_print_num_field(s, " int_info_err %llx", event, "exit_int_info_err", record, 1);
343
344 return 0;
345 }
346
kvm_nested_vmexit_handler(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)347 static int kvm_nested_vmexit_handler(struct trace_seq *s, struct tep_record *record,
348 struct event_format *event, void *context)
349 {
350 tep_print_num_field(s, "rip %llx ", event, "rip", record, 1);
351
352 return kvm_nested_vmexit_inject_handler(s, record, event, context);
353 }
354
355 union kvm_mmu_page_role {
356 unsigned word;
357 struct {
358 unsigned level:4;
359 unsigned cr4_pae:1;
360 unsigned quadrant:2;
361 unsigned direct:1;
362 unsigned access:3;
363 unsigned invalid:1;
364 unsigned nxe:1;
365 unsigned cr0_wp:1;
366 unsigned smep_and_not_wp:1;
367 unsigned smap_and_not_wp:1;
368 unsigned pad_for_nice_hex_output:8;
369 unsigned smm:8;
370 };
371 };
372
kvm_mmu_print_role(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)373 static int kvm_mmu_print_role(struct trace_seq *s, struct tep_record *record,
374 struct event_format *event, void *context)
375 {
376 unsigned long long val;
377 static const char *access_str[] = {
378 "---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"
379 };
380 union kvm_mmu_page_role role;
381
382 if (tep_get_field_val(s, event, "role", record, &val, 1) < 0)
383 return -1;
384
385 role.word = (int)val;
386
387 /*
388 * We can only use the structure if file is of the same
389 * endianess.
390 */
391 if (tep_is_file_bigendian(event->pevent) ==
392 tep_is_host_bigendian(event->pevent)) {
393
394 trace_seq_printf(s, "%u q%u%s %s%s %spae %snxe %swp%s%s%s",
395 role.level,
396 role.quadrant,
397 role.direct ? " direct" : "",
398 access_str[role.access],
399 role.invalid ? " invalid" : "",
400 role.cr4_pae ? "" : "!",
401 role.nxe ? "" : "!",
402 role.cr0_wp ? "" : "!",
403 role.smep_and_not_wp ? " smep" : "",
404 role.smap_and_not_wp ? " smap" : "",
405 role.smm ? " smm" : "");
406 } else
407 trace_seq_printf(s, "WORD: %08x", role.word);
408
409 tep_print_num_field(s, " root %u ", event,
410 "root_count", record, 1);
411
412 if (tep_get_field_val(s, event, "unsync", record, &val, 1) < 0)
413 return -1;
414
415 trace_seq_printf(s, "%s%c", val ? "unsync" : "sync", 0);
416 return 0;
417 }
418
kvm_mmu_get_page_handler(struct trace_seq * s,struct tep_record * record,struct event_format * event,void * context)419 static int kvm_mmu_get_page_handler(struct trace_seq *s,
420 struct tep_record *record,
421 struct event_format *event, void *context)
422 {
423 unsigned long long val;
424
425 if (tep_get_field_val(s, event, "created", record, &val, 1) < 0)
426 return -1;
427
428 trace_seq_printf(s, "%s ", val ? "new" : "existing");
429
430 if (tep_get_field_val(s, event, "gfn", record, &val, 1) < 0)
431 return -1;
432
433 trace_seq_printf(s, "sp gfn %llx ", val);
434 return kvm_mmu_print_role(s, record, event, context);
435 }
436
437 #define PT_WRITABLE_SHIFT 1
438 #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
439
440 static unsigned long long
process_is_writable_pte(struct trace_seq * s,unsigned long long * args)441 process_is_writable_pte(struct trace_seq *s, unsigned long long *args)
442 {
443 unsigned long pte = args[0];
444 return pte & PT_WRITABLE_MASK;
445 }
446
TEP_PLUGIN_LOADER(struct tep_handle * pevent)447 int TEP_PLUGIN_LOADER(struct tep_handle *pevent)
448 {
449 init_disassembler();
450
451 tep_register_event_handler(pevent, -1, "kvm", "kvm_exit",
452 kvm_exit_handler, NULL);
453
454 tep_register_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
455 kvm_emulate_insn_handler, NULL);
456
457 tep_register_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit",
458 kvm_nested_vmexit_handler, NULL);
459
460 tep_register_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit_inject",
461 kvm_nested_vmexit_inject_handler, NULL);
462
463 tep_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
464 kvm_mmu_get_page_handler, NULL);
465
466 tep_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_sync_page",
467 kvm_mmu_print_role, NULL);
468
469 tep_register_event_handler(pevent, -1,
470 "kvmmmu", "kvm_mmu_unsync_page",
471 kvm_mmu_print_role, NULL);
472
473 tep_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_zap_page",
474 kvm_mmu_print_role, NULL);
475
476 tep_register_event_handler(pevent, -1, "kvmmmu",
477 "kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
478 NULL);
479
480 tep_register_print_function(pevent,
481 process_is_writable_pte,
482 TEP_FUNC_ARG_INT,
483 "is_writable_pte",
484 TEP_FUNC_ARG_LONG,
485 TEP_FUNC_ARG_VOID);
486 return 0;
487 }
488
TEP_PLUGIN_UNLOADER(struct tep_handle * pevent)489 void TEP_PLUGIN_UNLOADER(struct tep_handle *pevent)
490 {
491 tep_unregister_event_handler(pevent, -1, "kvm", "kvm_exit",
492 kvm_exit_handler, NULL);
493
494 tep_unregister_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
495 kvm_emulate_insn_handler, NULL);
496
497 tep_unregister_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit",
498 kvm_nested_vmexit_handler, NULL);
499
500 tep_unregister_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit_inject",
501 kvm_nested_vmexit_inject_handler, NULL);
502
503 tep_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
504 kvm_mmu_get_page_handler, NULL);
505
506 tep_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_sync_page",
507 kvm_mmu_print_role, NULL);
508
509 tep_unregister_event_handler(pevent, -1,
510 "kvmmmu", "kvm_mmu_unsync_page",
511 kvm_mmu_print_role, NULL);
512
513 tep_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_zap_page",
514 kvm_mmu_print_role, NULL);
515
516 tep_unregister_event_handler(pevent, -1, "kvmmmu",
517 "kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
518 NULL);
519
520 tep_unregister_print_function(pevent, process_is_writable_pte,
521 "is_writable_pte");
522 }
523
