aboutsummaryrefslogtreecommitdiff
path: root/qtest.c
blob: fbfab4e1a7720c9be61cf78a62a56b19351bfc09 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/*
 * Test Server
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */

#include "qtest.h"
#include "hw/qdev.h"
#include "qemu-char.h"
#include "ioport.h"
#include "memory.h"
#include "hw/irq.h"
#include "sysemu.h"
#include "cpus.h"

#define MAX_IRQ 256

const char *qtest_chrdev;
const char *qtest_log;
int qtest_allowed = 0;

static DeviceState *irq_intercept_dev;
static FILE *qtest_log_fp;
static CharDriverState *qtest_chr;
static GString *inbuf;
static int irq_levels[MAX_IRQ];
static qemu_timeval start_time;
static bool qtest_opened;

#define FMT_timeval "%ld.%06ld"

/**
 * QTest Protocol
 *
 * Line based protocol, request/response based.  Server can send async messages
 * so clients should always handle many async messages before the response
 * comes in.
 *
 * Valid requests
 *
 * Clock management:
 *
 * The qtest client is completely in charge of the vm_clock.  qtest commands
 * let you adjust the value of the clock (monotonically).  All the commands
 * return the current value of the clock in nanoseconds.
 *
 *  > clock_step
 *  < OK VALUE
 *
 *     Advance the clock to the next deadline.  Useful when waiting for
 *     asynchronous events.
 *
 *  > clock_step NS
 *  < OK VALUE
 *
 *     Advance the clock by NS nanoseconds.
 *
 *  > clock_set NS
 *  < OK VALUE
 *
 *     Advance the clock to NS nanoseconds (do nothing if it's already past).
 *
 * PIO and memory access:
 *
 *  > outb ADDR VALUE
 *  < OK
 *
 *  > outw ADDR VALUE
 *  < OK
 *
 *  > outl ADDR VALUE
 *  < OK
 *
 *  > inb ADDR
 *  < OK VALUE
 *
 *  > inw ADDR
 *  < OK VALUE
 *
 *  > inl ADDR
 *  < OK VALUE
 *
 *  > read ADDR SIZE
 *  < OK DATA
 *
 *  > write ADDR SIZE DATA
 *  < OK
 *
 * ADDR, SIZE, VALUE are all integers parsed with strtoul() with a base of 0.
 *
 * DATA is an arbitrarily long hex number prefixed with '0x'.  If it's smaller
 * than the expected size, the value will be zero filled at the end of the data
 * sequence.
 *
 * IRQ management:
 *
 *  > irq_intercept_in QOM-PATH
 *  < OK
 *
 *  > irq_intercept_out QOM-PATH
 *  < OK
 *
 * Attach to the gpio-in (resp. gpio-out) pins exported by the device at
 * QOM-PATH.  When the pin is triggered, one of the following async messages
 * will be printed to the qtest stream:
 *
 *  IRQ raise NUM
 *  IRQ lower NUM
 *
 * where NUM is an IRQ number.  For the PC, interrupts can be intercepted
 * simply with "irq_intercept_in ioapic" (note that IRQ0 comes out with
 * NUM=0 even though it is remapped to GSI 2).
 */

static int hex2nib(char ch)
{
    if (ch >= '0' && ch <= '9') {
        return ch - '0';
    } else if (ch >= 'a' && ch <= 'f') {
        return 10 + (ch - 'a');
    } else if (ch >= 'A' && ch <= 'F') {
        return 10 + (ch - 'a');
    } else {
        return -1;
    }
}

static void qtest_get_time(qemu_timeval *tv)
{
    qemu_gettimeofday(tv);
    tv->tv_sec -= start_time.tv_sec;
    tv->tv_usec -= start_time.tv_usec;
    if (tv->tv_usec < 0) {
        tv->tv_usec += 1000000;
        tv->tv_sec -= 1;
    }
}

static void qtest_send_prefix(CharDriverState *chr)
{
    qemu_timeval tv;

    if (!qtest_log_fp || !qtest_opened) {
        return;
    }

    qtest_get_time(&tv);
    fprintf(qtest_log_fp, "[S +" FMT_timeval "] ",
            tv.tv_sec, (long) tv.tv_usec);
}

static void GCC_FMT_ATTR(2, 3) qtest_send(CharDriverState *chr,
                                          const char *fmt, ...)
{
    va_list ap;
    char buffer[1024];
    size_t len;

    va_start(ap, fmt);
    len = vsnprintf(buffer, sizeof(buffer), fmt, ap);
    va_end(ap);

    qemu_chr_fe_write(chr, (uint8_t *)buffer, len);
    if (qtest_log_fp && qtest_opened) {
        fprintf(qtest_log_fp, "%s", buffer);
    }
}

static void qtest_irq_handler(void *opaque, int n, int level)
{
    qemu_irq *old_irqs = opaque;
    qemu_set_irq(old_irqs[n], level);

    if (irq_levels[n] != level) {
        CharDriverState *chr = qtest_chr;
        irq_levels[n] = level;
        qtest_send_prefix(chr);
        qtest_send(chr, "IRQ %s %d\n",
                   level ? "raise" : "lower", n);
    }
}

static void qtest_process_command(CharDriverState *chr, gchar **words)
{
    const gchar *command;

    g_assert(words);

    command = words[0];

    if (qtest_log_fp) {
        qemu_timeval tv;
        int i;

        qtest_get_time(&tv);
        fprintf(qtest_log_fp, "[R +" FMT_timeval "]",
                tv.tv_sec, (long) tv.tv_usec);
        for (i = 0; words[i]; i++) {
            fprintf(qtest_log_fp, " %s", words[i]);
        }
        fprintf(qtest_log_fp, "\n");
    }

    g_assert(command);
    if (strcmp(words[0], "irq_intercept_out") == 0
        || strcmp(words[0], "irq_intercept_in") == 0) {
	DeviceState *dev;

        g_assert(words[1]);
        dev = DEVICE(object_resolve_path(words[1], NULL));
        if (!dev) {
            qtest_send_prefix(chr);
            qtest_send(chr, "FAIL Unknown device\n");
	    return;
        }

        if (irq_intercept_dev) {
            qtest_send_prefix(chr);
            if (irq_intercept_dev != dev) {
                qtest_send(chr, "FAIL IRQ intercept already enabled\n");
            } else {
                qtest_send(chr, "OK\n");
            }
	    return;
        }

        if (words[0][14] == 'o') {
            qemu_irq_intercept_out(&dev->gpio_out, qtest_irq_handler, dev->num_gpio_out);
        } else {
            qemu_irq_intercept_in(dev->gpio_in, qtest_irq_handler, dev->num_gpio_in);
        }
        irq_intercept_dev = dev;
        qtest_send_prefix(chr);
        qtest_send(chr, "OK\n");

    } else if (strcmp(words[0], "outb") == 0 ||
               strcmp(words[0], "outw") == 0 ||
               strcmp(words[0], "outl") == 0) {
        uint16_t addr;
        uint32_t value;

        g_assert(words[1] && words[2]);
        addr = strtol(words[1], NULL, 0);
        value = strtol(words[2], NULL, 0);

        if (words[0][3] == 'b') {
            cpu_outb(addr, value);
        } else if (words[0][3] == 'w') {
            cpu_outw(addr, value);
        } else if (words[0][3] == 'l') {
            cpu_outl(addr, value);
        }
        qtest_send_prefix(chr);
        qtest_send(chr, "OK\n");
    } else if (strcmp(words[0], "inb") == 0 ||
        strcmp(words[0], "inw") == 0 ||
        strcmp(words[0], "inl") == 0) {
        uint16_t addr;
        uint32_t value = -1U;

        g_assert(words[1]);
        addr = strtol(words[1], NULL, 0);

        if (words[0][2] == 'b') {
            value = cpu_inb(addr);
        } else if (words[0][2] == 'w') {
            value = cpu_inw(addr);
        } else if (words[0][2] == 'l') {
            value = cpu_inl(addr);
        }
        qtest_send_prefix(chr);
        qtest_send(chr, "OK 0x%04x\n", value);
    } else if (strcmp(words[0], "read") == 0) {
        uint64_t addr, len, i;
        uint8_t *data;

        g_assert(words[1] && words[2]);
        addr = strtoul(words[1], NULL, 0);
        len = strtoul(words[2], NULL, 0);

        data = g_malloc(len);
        cpu_physical_memory_read(addr, data, len);

        qtest_send_prefix(chr);
        qtest_send(chr, "OK 0x");
        for (i = 0; i < len; i++) {
            qtest_send(chr, "%02x", data[i]);
        }
        qtest_send(chr, "\n");

        g_free(data);
    } else if (strcmp(words[0], "write") == 0) {
        uint64_t addr, len, i;
        uint8_t *data;
        size_t data_len;

        g_assert(words[1] && words[2] && words[3]);
        addr = strtoul(words[1], NULL, 0);
        len = strtoul(words[2], NULL, 0);

        data_len = strlen(words[3]);
        if (data_len < 3) {
            qtest_send(chr, "ERR invalid argument size\n");
            return;
        }

        data = g_malloc(len);
        for (i = 0; i < len; i++) {
            if ((i * 2 + 4) <= data_len) {
                data[i] = hex2nib(words[3][i * 2 + 2]) << 4;
                data[i] |= hex2nib(words[3][i * 2 + 3]);
            } else {
                data[i] = 0;
            }
        }
        cpu_physical_memory_write(addr, data, len);
        g_free(data);

        qtest_send_prefix(chr);
        qtest_send(chr, "OK\n");
    } else if (strcmp(words[0], "clock_step") == 0) {
        int64_t ns;

        if (words[1]) {
            ns = strtoll(words[1], NULL, 0);
        } else {
            ns = qemu_clock_deadline(vm_clock);
        }
        qtest_clock_warp(qemu_get_clock_ns(vm_clock) + ns);
        qtest_send_prefix(chr);
        qtest_send(chr, "OK %"PRIi64"\n", (int64_t)qemu_get_clock_ns(vm_clock));
    } else if (strcmp(words[0], "clock_set") == 0) {
        int64_t ns;

        g_assert(words[1]);
        ns = strtoll(words[1], NULL, 0);
        qtest_clock_warp(ns);
        qtest_send_prefix(chr);
        qtest_send(chr, "OK %"PRIi64"\n", (int64_t)qemu_get_clock_ns(vm_clock));
    } else {
        qtest_send_prefix(chr);
        qtest_send(chr, "FAIL Unknown command `%s'\n", words[0]);
    }
}

static void qtest_process_inbuf(CharDriverState *chr, GString *inbuf)
{
    char *end;

    while ((end = strchr(inbuf->str, '\n')) != NULL) {
        size_t offset;
        GString *cmd;
        gchar **words;

        offset = end - inbuf->str;

        cmd = g_string_new_len(inbuf->str, offset);
        g_string_erase(inbuf, 0, offset + 1);

        words = g_strsplit(cmd->str, " ", 0);
        qtest_process_command(chr, words);
        g_strfreev(words);

        g_string_free(cmd, TRUE);
    }
}

static void qtest_read(void *opaque, const uint8_t *buf, int size)
{
    CharDriverState *chr = opaque;

    g_string_append_len(inbuf, (const gchar *)buf, size);
    qtest_process_inbuf(chr, inbuf);
}

static int qtest_can_read(void *opaque)
{
    return 1024;
}

static void qtest_event(void *opaque, int event)
{
    int i;

    switch (event) {
    case CHR_EVENT_OPENED:
        qemu_system_reset(false);
        for (i = 0; i < ARRAY_SIZE(irq_levels); i++) {
            irq_levels[i] = 0;
        }
        qemu_gettimeofday(&start_time);
        qtest_opened = true;
        if (qtest_log_fp) {
            fprintf(qtest_log_fp, "[I " FMT_timeval "] OPENED\n",
                    start_time.tv_sec, (long) start_time.tv_usec);
        }
        break;
    case CHR_EVENT_CLOSED:
        qtest_opened = false;
        if (qtest_log_fp) {
            qemu_timeval tv;
            qtest_get_time(&tv);
            fprintf(qtest_log_fp, "[I +" FMT_timeval "] CLOSED\n",
                    tv.tv_sec, (long) tv.tv_usec);
        }
        break;
    default:
        break;
    }
}

int qtest_init(void)
{
    CharDriverState *chr;

    g_assert(qtest_chrdev != NULL);

    configure_icount("0");
    chr = qemu_chr_new("qtest", qtest_chrdev, NULL);

    qemu_chr_add_handlers(chr, qtest_can_read, qtest_read, qtest_event, chr);
    qemu_chr_fe_set_echo(chr, true);

    inbuf = g_string_new("");

    if (qtest_log) {
        if (strcmp(qtest_log, "none") != 0) {
            qtest_log_fp = fopen(qtest_log, "w+");
        }
    } else {
        qtest_log_fp = stderr;
    }

    qtest_chr = chr;

    return 0;
}