/* * 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 "sysemu/qtest.h" #include "hw/qdev.h" #include "char/char.h" #include "exec/ioport.h" #include "exec/memory.h" #include "hw/irq.h" #include "sysemu/sysemu.h" #include "sysemu/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; }