/*
* QEMU System Emulator
*
- * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2003-2006 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
#include <time.h>
#include <errno.h>
#include <sys/time.h>
+#include <zlib.h>
#ifndef _WIN32
#include <sys/times.h>
void *ioport_opaque[MAX_IOPORTS];
IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
-BlockDriverState *bs_table[MAX_DISKS], *fd_table[MAX_FD];
+/* Note: bs_table[MAX_DISKS] is a dummy block driver if none available
+ to store the VM snapshots */
+BlockDriverState *bs_table[MAX_DISKS + 1], *fd_table[MAX_FD];
+/* point to the block driver where the snapshots are managed */
+BlockDriverState *bs_snapshots;
int vga_ram_size;
int bios_size;
static DisplayState display_state;
return qemu_put_mouse_event_absolute;
}
-/***********************************************************/
-/* timers */
-
-#if defined(__powerpc__)
-
-static inline uint32_t get_tbl(void)
+/* compute with 96 bit intermediate result: (a*b)/c */
+uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{
- uint32_t tbl;
- asm volatile("mftb %0" : "=r" (tbl));
- return tbl;
-}
+ union {
+ uint64_t ll;
+ struct {
+#ifdef WORDS_BIGENDIAN
+ uint32_t high, low;
+#else
+ uint32_t low, high;
+#endif
+ } l;
+ } u, res;
+ uint64_t rl, rh;
-static inline uint32_t get_tbu(void)
-{
- uint32_t tbl;
- asm volatile("mftbu %0" : "=r" (tbl));
- return tbl;
+ u.ll = a;
+ rl = (uint64_t)u.l.low * (uint64_t)b;
+ rh = (uint64_t)u.l.high * (uint64_t)b;
+ rh += (rl >> 32);
+ res.l.high = rh / c;
+ res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
+ return res.ll;
}
-int64_t cpu_get_real_ticks(void)
-{
- uint32_t l, h, h1;
- /* NOTE: we test if wrapping has occurred */
- do {
- h = get_tbu();
- l = get_tbl();
- h1 = get_tbu();
- } while (h != h1);
- return ((int64_t)h << 32) | l;
-}
+/***********************************************************/
+/* real time host monotonic timer */
-#elif defined(__i386__)
+#define QEMU_TIMER_BASE 1000000000LL
-int64_t cpu_get_real_ticks(void)
-{
-#ifdef _WIN32
- LARGE_INTEGER ti;
- QueryPerformanceCounter(&ti);
- return ti.QuadPart;
-#else
- int64_t val;
- asm volatile ("rdtsc" : "=A" (val));
- return val;
-#endif
-}
+#ifdef WIN32
-#elif defined(__x86_64__)
+static int64_t clock_freq;
-int64_t cpu_get_real_ticks(void)
+static void init_get_clock(void)
{
- uint32_t low,high;
- int64_t val;
- asm volatile("rdtsc" : "=a" (low), "=d" (high));
- val = high;
- val <<= 32;
- val |= low;
- return val;
+ LARGE_INTEGER freq;
+ int ret;
+ ret = QueryPerformanceFrequency(&freq);
+ if (ret == 0) {
+ fprintf(stderr, "Could not calibrate ticks\n");
+ exit(1);
+ }
+ clock_freq = freq.QuadPart;
}
-#elif defined(__ia64)
-
-int64_t cpu_get_real_ticks(void)
+static int64_t get_clock(void)
{
- int64_t val;
- asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory");
- return val;
+ LARGE_INTEGER ti;
+ QueryPerformanceCounter(&ti);
+ return muldiv64(ti.QuadPart, QEMU_TIMER_BASE, clock_freq);
}
-#elif defined(__s390__)
+#else
+
+static int use_rt_clock;
-int64_t cpu_get_real_ticks(void)
+static void init_get_clock(void)
{
- int64_t val;
- asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc");
- return val;
+ use_rt_clock = 0;
+#if defined(__linux__)
+ {
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
+ use_rt_clock = 1;
+ }
+ }
+#endif
}
-#elif defined(__sparc__) && defined(HOST_SOLARIS)
-
-uint64_t cpu_get_real_ticks (void)
+static int64_t get_clock(void)
{
-#if defined(_LP64)
- uint64_t rval;
- asm volatile("rd %%tick,%0" : "=r"(rval));
- return rval;
-#else
- union {
- uint64_t i64;
- struct {
- uint32_t high;
- uint32_t low;
- } i32;
- } rval;
- asm volatile("rd %%tick,%1; srlx %1,32,%0"
- : "=r"(rval.i32.high), "=r"(rval.i32.low));
- return rval.i64;
+#if defined(__linux__)
+ if (use_rt_clock) {
+ struct timespec ts;
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ return ts.tv_sec * 1000000000LL + ts.tv_nsec;
+ } else
#endif
+ {
+ /* XXX: using gettimeofday leads to problems if the date
+ changes, so it should be avoided. */
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000);
+ }
}
-#else
-#error unsupported CPU
#endif
+/***********************************************************/
+/* guest cycle counter */
+
static int64_t cpu_ticks_prev;
static int64_t cpu_ticks_offset;
+static int64_t cpu_clock_offset;
static int cpu_ticks_enabled;
-static inline int64_t cpu_get_ticks(void)
+/* return the host CPU cycle counter and handle stop/restart */
+int64_t cpu_get_ticks(void)
{
if (!cpu_ticks_enabled) {
return cpu_ticks_offset;
}
}
+/* return the host CPU monotonic timer and handle stop/restart */
+static int64_t cpu_get_clock(void)
+{
+ int64_t ti;
+ if (!cpu_ticks_enabled) {
+ return cpu_clock_offset;
+ } else {
+ ti = get_clock();
+ return ti + cpu_clock_offset;
+ }
+}
+
/* enable cpu_get_ticks() */
void cpu_enable_ticks(void)
{
if (!cpu_ticks_enabled) {
cpu_ticks_offset -= cpu_get_real_ticks();
+ cpu_clock_offset -= get_clock();
cpu_ticks_enabled = 1;
}
}
{
if (cpu_ticks_enabled) {
cpu_ticks_offset = cpu_get_ticks();
+ cpu_clock_offset = cpu_get_clock();
cpu_ticks_enabled = 0;
}
}
-#ifdef _WIN32
-void cpu_calibrate_ticks(void)
-{
- LARGE_INTEGER freq;
- int ret;
-
- ret = QueryPerformanceFrequency(&freq);
- if (ret == 0) {
- fprintf(stderr, "Could not calibrate ticks\n");
- exit(1);
- }
- ticks_per_sec = freq.QuadPart;
-}
-
-#else
-static int64_t get_clock(void)
-{
- struct timeval tv;
- gettimeofday(&tv, NULL);
- return tv.tv_sec * 1000000LL + tv.tv_usec;
-}
-
-void cpu_calibrate_ticks(void)
-{
- int64_t usec, ticks;
-
- usec = get_clock();
- ticks = cpu_get_real_ticks();
- usleep(50 * 1000);
- usec = get_clock() - usec;
- ticks = cpu_get_real_ticks() - ticks;
- ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec;
-}
-#endif /* !_WIN32 */
-
-/* compute with 96 bit intermediate result: (a*b)/c */
-uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
-{
- union {
- uint64_t ll;
- struct {
-#ifdef WORDS_BIGENDIAN
- uint32_t high, low;
-#else
- uint32_t low, high;
-#endif
- } l;
- } u, res;
- uint64_t rl, rh;
-
- u.ll = a;
- rl = (uint64_t)u.l.low * (uint64_t)b;
- rh = (uint64_t)u.l.high * (uint64_t)b;
- rh += (rl >> 32);
- res.l.high = rh / c;
- res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
- return res.ll;
-}
-
+/***********************************************************/
+/* timers */
+
#define QEMU_TIMER_REALTIME 0
#define QEMU_TIMER_VIRTUAL 1
{
switch(clock->type) {
case QEMU_TIMER_REALTIME:
-#ifdef _WIN32
- return GetTickCount();
-#else
- {
- struct tms tp;
-
- /* Note that using gettimeofday() is not a good solution
- for timers because its value change when the date is
- modified. */
- if (timer_freq == 100) {
- return times(&tp) * 10;
- } else {
- return ((int64_t)times(&tp) * 1000) / timer_freq;
- }
- }
-#endif
+ return get_clock() / 1000000;
default:
case QEMU_TIMER_VIRTUAL:
- return cpu_get_ticks();
+ return cpu_get_clock();
}
}
+static void init_timers(void)
+{
+ init_get_clock();
+ ticks_per_sec = QEMU_TIMER_BASE;
+ rt_clock = qemu_new_clock(QEMU_TIMER_REALTIME);
+ vm_clock = qemu_new_clock(QEMU_TIMER_VIRTUAL);
+}
+
/* save a timer */
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
{
}
qemu_put_be64s(f, &cpu_ticks_offset);
qemu_put_be64s(f, &ticks_per_sec);
+ qemu_put_be64s(f, &cpu_clock_offset);
}
static int timer_load(QEMUFile *f, void *opaque, int version_id)
{
- if (version_id != 1)
+ if (version_id != 1 && version_id != 2)
return -EINVAL;
if (cpu_ticks_enabled) {
return -EINVAL;
}
qemu_get_be64s(f, &cpu_ticks_offset);
qemu_get_be64s(f, &ticks_per_sec);
+ if (version_id == 2) {
+ qemu_get_be64s(f, &cpu_clock_offset);
+ }
return 0;
}
#endif /* !defined(_WIN32) */
-static void init_timers(void)
+static void init_timer_alarm(void)
{
- rt_clock = qemu_new_clock(QEMU_TIMER_REALTIME);
- vm_clock = qemu_new_clock(QEMU_TIMER_VIRTUAL);
-
#ifdef _WIN32
{
int count=0;
static int term_got_escape, client_index;
static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
-int term_fifo_size;
+static int term_fifo_size;
+static int term_timestamps;
+static int64_t term_timestamps_start;
void term_print_help(void)
{
"C-a x exit emulator\n"
"C-a s save disk data back to file (if -snapshot)\n"
"C-a b send break (magic sysrq)\n"
+ "C-a t toggle console timestamps\n"
"C-a c switch between console and monitor\n"
"C-a C-a send C-a\n"
);
goto send_char;
}
break;
+ case 't':
+ term_timestamps = !term_timestamps;
+ term_timestamps_start = -1;
+ break;
case TERM_ESCAPE:
goto send_char;
}
stdio_received_byte(buf[0]);
}
+static int stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
+{
+ FDCharDriver *s = chr->opaque;
+ if (!term_timestamps) {
+ return unix_write(s->fd_out, buf, len);
+ } else {
+ int i;
+ char buf1[64];
+
+ for(i = 0; i < len; i++) {
+ unix_write(s->fd_out, buf + i, 1);
+ if (buf[i] == '\n') {
+ int64_t ti;
+ int secs;
+
+ ti = get_clock();
+ if (term_timestamps_start == -1)
+ term_timestamps_start = ti;
+ ti -= term_timestamps_start;
+ secs = ti / 1000000000;
+ snprintf(buf1, sizeof(buf1),
+ "[%02d:%02d:%02d.%03d] ",
+ secs / 3600,
+ (secs / 60) % 60,
+ secs % 60,
+ (int)((ti / 1000000) % 1000));
+ unix_write(s->fd_out, buf1, strlen(buf1));
+ }
+ }
+ return len;
+ }
+}
+
/* init terminal so that we can grab keys */
static struct termios oldtty;
static int old_fd0_flags;
if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
return NULL;
chr = qemu_chr_open_fd(0, 1);
+ chr->chr_write = stdio_write;
if (stdio_nb_clients == 0)
qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, NULL);
client_index = stdio_nb_clients;
{
USBPort *port;
USBPort **lastp;
+ USBDevice *dev;
int bus_num, addr;
const char *p;
if (!port)
return -1;
+ dev = port->dev;
*lastp = port->next;
usb_attach(port, NULL);
+ dev->handle_destroy(dev);
port->next = free_usb_ports;
free_usb_ports = port;
return 0;
/***********************************************************/
/* savevm/loadvm support */
+#define IO_BUF_SIZE 32768
+
+struct QEMUFile {
+ FILE *outfile;
+ BlockDriverState *bs;
+ int is_file;
+ int is_writable;
+ int64_t base_offset;
+ int64_t buf_offset; /* start of buffer when writing, end of buffer
+ when reading */
+ int buf_index;
+ int buf_size; /* 0 when writing */
+ uint8_t buf[IO_BUF_SIZE];
+};
+
+QEMUFile *qemu_fopen(const char *filename, const char *mode)
+{
+ QEMUFile *f;
+
+ f = qemu_mallocz(sizeof(QEMUFile));
+ if (!f)
+ return NULL;
+ if (!strcmp(mode, "wb")) {
+ f->is_writable = 1;
+ } else if (!strcmp(mode, "rb")) {
+ f->is_writable = 0;
+ } else {
+ goto fail;
+ }
+ f->outfile = fopen(filename, mode);
+ if (!f->outfile)
+ goto fail;
+ f->is_file = 1;
+ return f;
+ fail:
+ if (f->outfile)
+ fclose(f->outfile);
+ qemu_free(f);
+ return NULL;
+}
+
+QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
+{
+ QEMUFile *f;
+
+ f = qemu_mallocz(sizeof(QEMUFile));
+ if (!f)
+ return NULL;
+ f->is_file = 0;
+ f->bs = bs;
+ f->is_writable = is_writable;
+ f->base_offset = offset;
+ return f;
+}
+
+void qemu_fflush(QEMUFile *f)
+{
+ if (!f->is_writable)
+ return;
+ if (f->buf_index > 0) {
+ if (f->is_file) {
+ fseek(f->outfile, f->buf_offset, SEEK_SET);
+ fwrite(f->buf, 1, f->buf_index, f->outfile);
+ } else {
+ bdrv_pwrite(f->bs, f->base_offset + f->buf_offset,
+ f->buf, f->buf_index);
+ }
+ f->buf_offset += f->buf_index;
+ f->buf_index = 0;
+ }
+}
+
+static void qemu_fill_buffer(QEMUFile *f)
+{
+ int len;
+
+ if (f->is_writable)
+ return;
+ if (f->is_file) {
+ fseek(f->outfile, f->buf_offset, SEEK_SET);
+ len = fread(f->buf, 1, IO_BUF_SIZE, f->outfile);
+ if (len < 0)
+ len = 0;
+ } else {
+ len = bdrv_pread(f->bs, f->base_offset + f->buf_offset,
+ f->buf, IO_BUF_SIZE);
+ if (len < 0)
+ len = 0;
+ }
+ f->buf_index = 0;
+ f->buf_size = len;
+ f->buf_offset += len;
+}
+
+void qemu_fclose(QEMUFile *f)
+{
+ if (f->is_writable)
+ qemu_fflush(f);
+ if (f->is_file) {
+ fclose(f->outfile);
+ }
+ qemu_free(f);
+}
+
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
{
- fwrite(buf, 1, size, f);
+ int l;
+ while (size > 0) {
+ l = IO_BUF_SIZE - f->buf_index;
+ if (l > size)
+ l = size;
+ memcpy(f->buf + f->buf_index, buf, l);
+ f->buf_index += l;
+ buf += l;
+ size -= l;
+ if (f->buf_index >= IO_BUF_SIZE)
+ qemu_fflush(f);
+ }
}
void qemu_put_byte(QEMUFile *f, int v)
{
- fputc(v, f);
+ f->buf[f->buf_index++] = v;
+ if (f->buf_index >= IO_BUF_SIZE)
+ qemu_fflush(f);
+}
+
+int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
+{
+ int size, l;
+
+ size = size1;
+ while (size > 0) {
+ l = f->buf_size - f->buf_index;
+ if (l == 0) {
+ qemu_fill_buffer(f);
+ l = f->buf_size - f->buf_index;
+ if (l == 0)
+ break;
+ }
+ if (l > size)
+ l = size;
+ memcpy(buf, f->buf + f->buf_index, l);
+ f->buf_index += l;
+ buf += l;
+ size -= l;
+ }
+ return size1 - size;
+}
+
+int qemu_get_byte(QEMUFile *f)
+{
+ if (f->buf_index >= f->buf_size) {
+ qemu_fill_buffer(f);
+ if (f->buf_index >= f->buf_size)
+ return 0;
+ }
+ return f->buf[f->buf_index++];
+}
+
+int64_t qemu_ftell(QEMUFile *f)
+{
+ return f->buf_offset - f->buf_size + f->buf_index;
+}
+
+int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
+{
+ if (whence == SEEK_SET) {
+ /* nothing to do */
+ } else if (whence == SEEK_CUR) {
+ pos += qemu_ftell(f);
+ } else {
+ /* SEEK_END not supported */
+ return -1;
+ }
+ if (f->is_writable) {
+ qemu_fflush(f);
+ f->buf_offset = pos;
+ } else {
+ f->buf_offset = pos;
+ f->buf_index = 0;
+ f->buf_size = 0;
+ }
+ return pos;
}
void qemu_put_be16(QEMUFile *f, unsigned int v)
qemu_put_be32(f, v);
}
-int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
-{
- return fread(buf, 1, size, f);
-}
-
-int qemu_get_byte(QEMUFile *f)
-{
- int v;
- v = fgetc(f);
- if (v == EOF)
- return 0;
- else
- return v;
-}
-
unsigned int qemu_get_be16(QEMUFile *f)
{
unsigned int v;
return v;
}
-int64_t qemu_ftell(QEMUFile *f)
-{
- return ftell(f);
-}
-
-int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
-{
- if (fseek(f, pos, whence) < 0)
- return -1;
- return ftell(f);
-}
-
typedef struct SaveStateEntry {
char idstr[256];
int instance_id;
}
#define QEMU_VM_FILE_MAGIC 0x5145564d
-#define QEMU_VM_FILE_VERSION 0x00000001
+#define QEMU_VM_FILE_VERSION 0x00000002
-int qemu_savevm(const char *filename)
+int qemu_savevm_state(QEMUFile *f)
{
SaveStateEntry *se;
- QEMUFile *f;
- int len, len_pos, cur_pos, saved_vm_running, ret;
-
- saved_vm_running = vm_running;
- vm_stop(0);
-
- f = fopen(filename, "wb");
- if (!f) {
- ret = -1;
- goto the_end;
- }
+ int len, ret;
+ int64_t cur_pos, len_pos, total_len_pos;
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
+ total_len_pos = qemu_ftell(f);
+ qemu_put_be64(f, 0); /* total size */
for(se = first_se; se != NULL; se = se->next) {
/* ID string */
qemu_put_be32(f, se->version_id);
/* record size: filled later */
- len_pos = ftell(f);
+ len_pos = qemu_ftell(f);
qemu_put_be32(f, 0);
se->save_state(f, se->opaque);
/* fill record size */
- cur_pos = ftell(f);
- len = ftell(f) - len_pos - 4;
- fseek(f, len_pos, SEEK_SET);
+ cur_pos = qemu_ftell(f);
+ len = cur_pos - len_pos - 4;
+ qemu_fseek(f, len_pos, SEEK_SET);
qemu_put_be32(f, len);
- fseek(f, cur_pos, SEEK_SET);
+ qemu_fseek(f, cur_pos, SEEK_SET);
}
+ cur_pos = qemu_ftell(f);
+ qemu_fseek(f, total_len_pos, SEEK_SET);
+ qemu_put_be64(f, cur_pos - total_len_pos - 8);
+ qemu_fseek(f, cur_pos, SEEK_SET);
- fclose(f);
ret = 0;
- the_end:
- if (saved_vm_running)
- vm_start();
return ret;
}
return NULL;
}
-int qemu_loadvm(const char *filename)
+int qemu_loadvm_state(QEMUFile *f)
{
SaveStateEntry *se;
- QEMUFile *f;
- int len, cur_pos, ret, instance_id, record_len, version_id;
- int saved_vm_running;
+ int len, ret, instance_id, record_len, version_id;
+ int64_t total_len, end_pos, cur_pos;
unsigned int v;
char idstr[256];
- saved_vm_running = vm_running;
- vm_stop(0);
-
- f = fopen(filename, "rb");
- if (!f) {
- ret = -1;
- goto the_end;
- }
-
v = qemu_get_be32(f);
if (v != QEMU_VM_FILE_MAGIC)
goto fail;
v = qemu_get_be32(f);
if (v != QEMU_VM_FILE_VERSION) {
fail:
- fclose(f);
ret = -1;
goto the_end;
}
+ total_len = qemu_get_be64(f);
+ end_pos = total_len + qemu_ftell(f);
for(;;) {
- len = qemu_get_byte(f);
- if (feof(f))
+ if (qemu_ftell(f) >= end_pos)
break;
+ len = qemu_get_byte(f);
qemu_get_buffer(f, idstr, len);
idstr[len] = '\0';
instance_id = qemu_get_be32(f);
printf("idstr=%s instance=0x%x version=%d len=%d\n",
idstr, instance_id, version_id, record_len);
#endif
- cur_pos = ftell(f);
+ cur_pos = qemu_ftell(f);
se = find_se(idstr, instance_id);
if (!se) {
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
/* always seek to exact end of record */
qemu_fseek(f, cur_pos + record_len, SEEK_SET);
}
- fclose(f);
ret = 0;
+ the_end:
+ return ret;
+}
+
+/* device can contain snapshots */
+static int bdrv_can_snapshot(BlockDriverState *bs)
+{
+ return (bs &&
+ !bdrv_is_removable(bs) &&
+ !bdrv_is_read_only(bs));
+}
+
+/* device must be snapshots in order to have a reliable snapshot */
+static int bdrv_has_snapshot(BlockDriverState *bs)
+{
+ return (bs &&
+ !bdrv_is_removable(bs) &&
+ !bdrv_is_read_only(bs));
+}
+
+static BlockDriverState *get_bs_snapshots(void)
+{
+ BlockDriverState *bs;
+ int i;
+
+ if (bs_snapshots)
+ return bs_snapshots;
+ for(i = 0; i <= MAX_DISKS; i++) {
+ bs = bs_table[i];
+ if (bdrv_can_snapshot(bs))
+ goto ok;
+ }
+ return NULL;
+ ok:
+ bs_snapshots = bs;
+ return bs;
+}
+
+static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
+ const char *name)
+{
+ QEMUSnapshotInfo *sn_tab, *sn;
+ int nb_sns, i, ret;
+
+ ret = -ENOENT;
+ nb_sns = bdrv_snapshot_list(bs, &sn_tab);
+ if (nb_sns < 0)
+ return ret;
+ for(i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
+ *sn_info = *sn;
+ ret = 0;
+ break;
+ }
+ }
+ qemu_free(sn_tab);
+ return ret;
+}
+
+void do_savevm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
+ int must_delete, ret, i;
+ BlockDriverInfo bdi1, *bdi = &bdi1;
+ QEMUFile *f;
+ int saved_vm_running;
+#ifdef _WIN32
+ struct _timeb tb;
+#else
+ struct timeval tv;
+#endif
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device can accept snapshots\n");
+ return;
+ }
+
+ /* ??? Should this occur after vm_stop? */
+ qemu_aio_flush();
+
+ saved_vm_running = vm_running;
+ vm_stop(0);
+
+ must_delete = 0;
+ if (name) {
+ ret = bdrv_snapshot_find(bs, old_sn, name);
+ if (ret >= 0) {
+ must_delete = 1;
+ }
+ }
+ memset(sn, 0, sizeof(*sn));
+ if (must_delete) {
+ pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
+ pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
+ } else {
+ if (name)
+ pstrcpy(sn->name, sizeof(sn->name), name);
+ }
+
+ /* fill auxiliary fields */
+#ifdef _WIN32
+ _ftime(&tb);
+ sn->date_sec = tb.time;
+ sn->date_nsec = tb.millitm * 1000000;
+#else
+ gettimeofday(&tv, NULL);
+ sn->date_sec = tv.tv_sec;
+ sn->date_nsec = tv.tv_usec * 1000;
+#endif
+ sn->vm_clock_nsec = qemu_get_clock(vm_clock);
+
+ if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
+ term_printf("Device %s does not support VM state snapshots\n",
+ bdrv_get_device_name(bs));
+ goto the_end;
+ }
+
+ /* save the VM state */
+ f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
+ if (!f) {
+ term_printf("Could not open VM state file\n");
+ goto the_end;
+ }
+ ret = qemu_savevm_state(f);
+ sn->vm_state_size = qemu_ftell(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ term_printf("Error %d while writing VM\n", ret);
+ goto the_end;
+ }
+
+ /* create the snapshots */
+
+ for(i = 0; i < MAX_DISKS; i++) {
+ bs1 = bs_table[i];
+ if (bdrv_has_snapshot(bs1)) {
+ if (must_delete) {
+ ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
+ if (ret < 0) {
+ term_printf("Error while deleting snapshot on '%s'\n",
+ bdrv_get_device_name(bs1));
+ }
+ }
+ ret = bdrv_snapshot_create(bs1, sn);
+ if (ret < 0) {
+ term_printf("Error while creating snapshot on '%s'\n",
+ bdrv_get_device_name(bs1));
+ }
+ }
+ }
+
the_end:
if (saved_vm_running)
vm_start();
- return ret;
+}
+
+void do_loadvm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ BlockDriverInfo bdi1, *bdi = &bdi1;
+ QEMUFile *f;
+ int i, ret;
+ int saved_vm_running;
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device supports snapshots\n");
+ return;
+ }
+
+ /* Flush all IO requests so they don't interfere with the new state. */
+ qemu_aio_flush();
+
+ saved_vm_running = vm_running;
+ vm_stop(0);
+
+ for(i = 0; i <= MAX_DISKS; i++) {
+ bs1 = bs_table[i];
+ if (bdrv_has_snapshot(bs1)) {
+ ret = bdrv_snapshot_goto(bs1, name);
+ if (ret < 0) {
+ if (bs != bs1)
+ term_printf("Warning: ");
+ switch(ret) {
+ case -ENOTSUP:
+ term_printf("Snapshots not supported on device '%s'\n",
+ bdrv_get_device_name(bs1));
+ break;
+ case -ENOENT:
+ term_printf("Could not find snapshot '%s' on device '%s'\n",
+ name, bdrv_get_device_name(bs1));
+ break;
+ default:
+ term_printf("Error %d while activating snapshot on '%s'\n",
+ ret, bdrv_get_device_name(bs1));
+ break;
+ }
+ /* fatal on snapshot block device */
+ if (bs == bs1)
+ goto the_end;
+ }
+ }
+ }
+
+ if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
+ term_printf("Device %s does not support VM state snapshots\n",
+ bdrv_get_device_name(bs));
+ return;
+ }
+
+ /* restore the VM state */
+ f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
+ if (!f) {
+ term_printf("Could not open VM state file\n");
+ goto the_end;
+ }
+ ret = qemu_loadvm_state(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ term_printf("Error %d while loading VM state\n", ret);
+ }
+ the_end:
+ if (saved_vm_running)
+ vm_start();
+}
+
+void do_delvm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ int i, ret;
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device supports snapshots\n");
+ return;
+ }
+
+ for(i = 0; i <= MAX_DISKS; i++) {
+ bs1 = bs_table[i];
+ if (bdrv_has_snapshot(bs1)) {
+ ret = bdrv_snapshot_delete(bs1, name);
+ if (ret < 0) {
+ if (ret == -ENOTSUP)
+ term_printf("Snapshots not supported on device '%s'\n",
+ bdrv_get_device_name(bs1));
+ else
+ term_printf("Error %d while deleting snapshot on '%s'\n",
+ ret, bdrv_get_device_name(bs1));
+ }
+ }
+ }
+}
+
+void do_info_snapshots(void)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo *sn_tab, *sn;
+ int nb_sns, i;
+ char buf[256];
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No available block device supports snapshots\n");
+ return;
+ }
+ term_printf("Snapshot devices:");
+ for(i = 0; i <= MAX_DISKS; i++) {
+ bs1 = bs_table[i];
+ if (bdrv_has_snapshot(bs1)) {
+ if (bs == bs1)
+ term_printf(" %s", bdrv_get_device_name(bs1));
+ }
+ }
+ term_printf("\n");
+
+ nb_sns = bdrv_snapshot_list(bs, &sn_tab);
+ if (nb_sns < 0) {
+ term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
+ return;
+ }
+ term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
+ term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
+ for(i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
+ }
+ qemu_free(sn_tab);
}
/***********************************************************/
/***********************************************************/
/* ram save/restore */
-/* we just avoid storing empty pages */
-static void ram_put_page(QEMUFile *f, const uint8_t *buf, int len)
-{
- int i, v;
-
- v = buf[0];
- for(i = 1; i < len; i++) {
- if (buf[i] != v)
- goto normal_save;
- }
- qemu_put_byte(f, 1);
- qemu_put_byte(f, v);
- return;
- normal_save:
- qemu_put_byte(f, 0);
- qemu_put_buffer(f, buf, len);
-}
-
static int ram_get_page(QEMUFile *f, uint8_t *buf, int len)
{
int v;
return 0;
}
+static int ram_load_v1(QEMUFile *f, void *opaque)
+{
+ int i, ret;
+
+ if (qemu_get_be32(f) != phys_ram_size)
+ return -EINVAL;
+ for(i = 0; i < phys_ram_size; i+= TARGET_PAGE_SIZE) {
+ ret = ram_get_page(f, phys_ram_base + i, TARGET_PAGE_SIZE);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+#define BDRV_HASH_BLOCK_SIZE 1024
+#define IOBUF_SIZE 4096
+#define RAM_CBLOCK_MAGIC 0xfabe
+
+typedef struct RamCompressState {
+ z_stream zstream;
+ QEMUFile *f;
+ uint8_t buf[IOBUF_SIZE];
+} RamCompressState;
+
+static int ram_compress_open(RamCompressState *s, QEMUFile *f)
+{
+ int ret;
+ memset(s, 0, sizeof(*s));
+ s->f = f;
+ ret = deflateInit2(&s->zstream, 1,
+ Z_DEFLATED, 15,
+ 9, Z_DEFAULT_STRATEGY);
+ if (ret != Z_OK)
+ return -1;
+ s->zstream.avail_out = IOBUF_SIZE;
+ s->zstream.next_out = s->buf;
+ return 0;
+}
+
+static void ram_put_cblock(RamCompressState *s, const uint8_t *buf, int len)
+{
+ qemu_put_be16(s->f, RAM_CBLOCK_MAGIC);
+ qemu_put_be16(s->f, len);
+ qemu_put_buffer(s->f, buf, len);
+}
+
+static int ram_compress_buf(RamCompressState *s, const uint8_t *buf, int len)
+{
+ int ret;
+
+ s->zstream.avail_in = len;
+ s->zstream.next_in = (uint8_t *)buf;
+ while (s->zstream.avail_in > 0) {
+ ret = deflate(&s->zstream, Z_NO_FLUSH);
+ if (ret != Z_OK)
+ return -1;
+ if (s->zstream.avail_out == 0) {
+ ram_put_cblock(s, s->buf, IOBUF_SIZE);
+ s->zstream.avail_out = IOBUF_SIZE;
+ s->zstream.next_out = s->buf;
+ }
+ }
+ return 0;
+}
+
+static void ram_compress_close(RamCompressState *s)
+{
+ int len, ret;
+
+ /* compress last bytes */
+ for(;;) {
+ ret = deflate(&s->zstream, Z_FINISH);
+ if (ret == Z_OK || ret == Z_STREAM_END) {
+ len = IOBUF_SIZE - s->zstream.avail_out;
+ if (len > 0) {
+ ram_put_cblock(s, s->buf, len);
+ }
+ s->zstream.avail_out = IOBUF_SIZE;
+ s->zstream.next_out = s->buf;
+ if (ret == Z_STREAM_END)
+ break;
+ } else {
+ goto fail;
+ }
+ }
+fail:
+ deflateEnd(&s->zstream);
+}
+
+typedef struct RamDecompressState {
+ z_stream zstream;
+ QEMUFile *f;
+ uint8_t buf[IOBUF_SIZE];
+} RamDecompressState;
+
+static int ram_decompress_open(RamDecompressState *s, QEMUFile *f)
+{
+ int ret;
+ memset(s, 0, sizeof(*s));
+ s->f = f;
+ ret = inflateInit(&s->zstream);
+ if (ret != Z_OK)
+ return -1;
+ return 0;
+}
+
+static int ram_decompress_buf(RamDecompressState *s, uint8_t *buf, int len)
+{
+ int ret, clen;
+
+ s->zstream.avail_out = len;
+ s->zstream.next_out = buf;
+ while (s->zstream.avail_out > 0) {
+ if (s->zstream.avail_in == 0) {
+ if (qemu_get_be16(s->f) != RAM_CBLOCK_MAGIC)
+ return -1;
+ clen = qemu_get_be16(s->f);
+ if (clen > IOBUF_SIZE)
+ return -1;
+ qemu_get_buffer(s->f, s->buf, clen);
+ s->zstream.avail_in = clen;
+ s->zstream.next_in = s->buf;
+ }
+ ret = inflate(&s->zstream, Z_PARTIAL_FLUSH);
+ if (ret != Z_OK && ret != Z_STREAM_END) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static void ram_decompress_close(RamDecompressState *s)
+{
+ inflateEnd(&s->zstream);
+}
+
static void ram_save(QEMUFile *f, void *opaque)
{
int i;
+ RamCompressState s1, *s = &s1;
+ uint8_t buf[10];
+
qemu_put_be32(f, phys_ram_size);
- for(i = 0; i < phys_ram_size; i+= TARGET_PAGE_SIZE) {
- ram_put_page(f, phys_ram_base + i, TARGET_PAGE_SIZE);
+ if (ram_compress_open(s, f) < 0)
+ return;
+ for(i = 0; i < phys_ram_size; i+= BDRV_HASH_BLOCK_SIZE) {
+#if 0
+ if (tight_savevm_enabled) {
+ int64_t sector_num;
+ int j;
+
+ /* find if the memory block is available on a virtual
+ block device */
+ sector_num = -1;
+ for(j = 0; j < MAX_DISKS; j++) {
+ if (bs_table[j]) {
+ sector_num = bdrv_hash_find(bs_table[j],
+ phys_ram_base + i, BDRV_HASH_BLOCK_SIZE);
+ if (sector_num >= 0)
+ break;
+ }
+ }
+ if (j == MAX_DISKS)
+ goto normal_compress;
+ buf[0] = 1;
+ buf[1] = j;
+ cpu_to_be64wu((uint64_t *)(buf + 2), sector_num);
+ ram_compress_buf(s, buf, 10);
+ } else
+#endif
+ {
+ // normal_compress:
+ buf[0] = 0;
+ ram_compress_buf(s, buf, 1);
+ ram_compress_buf(s, phys_ram_base + i, BDRV_HASH_BLOCK_SIZE);
+ }
}
+ ram_compress_close(s);
}
static int ram_load(QEMUFile *f, void *opaque, int version_id)
{
- int i, ret;
+ RamDecompressState s1, *s = &s1;
+ uint8_t buf[10];
+ int i;
- if (version_id != 1)
+ if (version_id == 1)
+ return ram_load_v1(f, opaque);
+ if (version_id != 2)
return -EINVAL;
if (qemu_get_be32(f) != phys_ram_size)
return -EINVAL;
- for(i = 0; i < phys_ram_size; i+= TARGET_PAGE_SIZE) {
- ret = ram_get_page(f, phys_ram_base + i, TARGET_PAGE_SIZE);
- if (ret)
- return ret;
+ if (ram_decompress_open(s, f) < 0)
+ return -EINVAL;
+ for(i = 0; i < phys_ram_size; i+= BDRV_HASH_BLOCK_SIZE) {
+ if (ram_decompress_buf(s, buf, 1) < 0) {
+ fprintf(stderr, "Error while reading ram block header\n");
+ goto error;
+ }
+ if (buf[0] == 0) {
+ if (ram_decompress_buf(s, phys_ram_base + i, BDRV_HASH_BLOCK_SIZE) < 0) {
+ fprintf(stderr, "Error while reading ram block address=0x%08x", i);
+ goto error;
+ }
+ } else
+#if 0
+ if (buf[0] == 1) {
+ int bs_index;
+ int64_t sector_num;
+
+ ram_decompress_buf(s, buf + 1, 9);
+ bs_index = buf[1];
+ sector_num = be64_to_cpupu((const uint64_t *)(buf + 2));
+ if (bs_index >= MAX_DISKS || bs_table[bs_index] == NULL) {
+ fprintf(stderr, "Invalid block device index %d\n", bs_index);
+ goto error;
+ }
+ if (bdrv_read(bs_table[bs_index], sector_num, phys_ram_base + i,
+ BDRV_HASH_BLOCK_SIZE / 512) < 0) {
+ fprintf(stderr, "Error while reading sector %d:%" PRId64 "\n",
+ bs_index, sector_num);
+ goto error;
+ }
+ } else
+#endif
+ {
+ error:
+ printf("Error block header\n");
+ return -EINVAL;
+ }
}
+ ram_decompress_close(s);
return 0;
}
+/***********************************************************/
+/* bottom halves (can be seen as timers which expire ASAP) */
+
+struct QEMUBH {
+ QEMUBHFunc *cb;
+ void *opaque;
+ int scheduled;
+ QEMUBH *next;
+};
+
+static QEMUBH *first_bh = NULL;
+
+QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
+{
+ QEMUBH *bh;
+ bh = qemu_mallocz(sizeof(QEMUBH));
+ if (!bh)
+ return NULL;
+ bh->cb = cb;
+ bh->opaque = opaque;
+ return bh;
+}
+
+int qemu_bh_poll(void)
+{
+ QEMUBH *bh, **pbh;
+ int ret;
+
+ ret = 0;
+ for(;;) {
+ pbh = &first_bh;
+ bh = *pbh;
+ if (!bh)
+ break;
+ ret = 1;
+ *pbh = bh->next;
+ bh->scheduled = 0;
+ bh->cb(bh->opaque);
+ }
+ return ret;
+}
+
+void qemu_bh_schedule(QEMUBH *bh)
+{
+ CPUState *env = cpu_single_env;
+ if (bh->scheduled)
+ return;
+ bh->scheduled = 1;
+ bh->next = first_bh;
+ first_bh = bh;
+
+ /* stop the currently executing CPU to execute the BH ASAP */
+ if (env) {
+ cpu_interrupt(env, CPU_INTERRUPT_EXIT);
+ }
+}
+
+void qemu_bh_cancel(QEMUBH *bh)
+{
+ QEMUBH **pbh;
+ if (bh->scheduled) {
+ pbh = &first_bh;
+ while (*pbh != bh)
+ pbh = &(*pbh)->next;
+ *pbh = bh->next;
+ bh->scheduled = 0;
+ }
+}
+
+void qemu_bh_delete(QEMUBH *bh)
+{
+ qemu_bh_cancel(bh);
+ qemu_free(bh);
+}
+
/***********************************************************/
/* machine registration */
slirp_select_poll(&rfds, &wfds, &xfds);
}
#endif
-#ifdef _WIN32
- tap_win32_poll();
-#endif
+ qemu_aio_poll();
+ qemu_bh_poll();
if (vm_running) {
qemu_run_timers(&active_timers[QEMU_TIMER_VIRTUAL],
void help(void)
{
- printf("QEMU PC emulator version " QEMU_VERSION ", Copyright (c) 2003-2005 Fabrice Bellard\n"
+ printf("QEMU PC emulator version " QEMU_VERSION ", Copyright (c) 2003-2006 Fabrice Bellard\n"
"usage: %s [options] [disk_image]\n"
"\n"
"'disk_image' is a raw hard image image for IDE hard disk 0\n"
"-d item1,... output log to %s (use -d ? for a list of log items)\n"
"-hdachs c,h,s[,t] force hard disk 0 physical geometry and the optional BIOS\n"
" translation (t=none or lba) (usually qemu can guess them)\n"
- "-L path set the directory for the BIOS and VGA BIOS\n"
+ "-L path set the directory for the BIOS, VGA BIOS and keymaps\n"
#ifdef USE_KQEMU
"-kernel-kqemu enable KQEMU full virtualization (default is user mode only)\n"
"-no-kqemu disable KQEMU kernel module usage\n"
}
#else
SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
+ /* Note: cpu_interrupt() is currently not SMP safe, so we force
+ QEMU to run on a single CPU */
+ {
+ HANDLE h;
+ DWORD mask, smask;
+ int i;
+ h = GetCurrentProcess();
+ if (GetProcessAffinityMask(h, &mask, &smask)) {
+ for(i = 0; i < 32; i++) {
+ if (mask & (1 << i))
+ break;
+ }
+ if (i != 32) {
+ mask = 1 << i;
+ SetProcessAffinityMask(h, mask);
+ }
+ }
+ }
#endif
- init_timers();
register_machines();
machine = first_machine;
setvbuf(stdout, NULL, _IOLBF, 0);
+ init_timers();
+ init_timer_alarm();
+ qemu_aio_init();
+
#ifdef _WIN32
socket_init();
#endif
snprintf(buf, sizeof(buf), "hd%c", i + 'a');
bs_table[i] = bdrv_new(buf);
}
- if (bdrv_open(bs_table[i], hd_filename[i], snapshot) < 0) {
+ if (bdrv_open(bs_table[i], hd_filename[i], snapshot ? BDRV_O_SNAPSHOT : 0) < 0) {
fprintf(stderr, "qemu: could not open hard disk image '%s'\n",
hd_filename[i]);
exit(1);
bdrv_set_type_hint(fd_table[i], BDRV_TYPE_FLOPPY);
}
if (fd_filename[i] != '\0') {
- if (bdrv_open(fd_table[i], fd_filename[i], snapshot) < 0) {
+ if (bdrv_open(fd_table[i], fd_filename[i],
+ snapshot ? BDRV_O_SNAPSHOT : 0) < 0) {
fprintf(stderr, "qemu: could not open floppy disk image '%s'\n",
fd_filename[i]);
exit(1);
}
}
- register_savevm("timer", 0, 1, timer_save, timer_load, NULL);
- register_savevm("ram", 0, 1, ram_save, ram_load, NULL);
+ register_savevm("timer", 0, 2, timer_save, timer_load, NULL);
+ register_savevm("ram", 0, 2, ram_save, ram_load, NULL);
init_ioports();
- cpu_calibrate_ticks();
/* terminal init */
if (nographic) {
monitor_init(monitor_hd, !nographic);
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
- if (serial_devices[i][0] != '\0') {
- serial_hds[i] = qemu_chr_open(serial_devices[i]);
+ const char *devname = serial_devices[i];
+ if (devname[0] != '\0' && strcmp(devname, "none")) {
+ serial_hds[i] = qemu_chr_open(devname);
if (!serial_hds[i]) {
fprintf(stderr, "qemu: could not open serial device '%s'\n",
- serial_devices[i]);
+ devname);
exit(1);
}
- if (!strcmp(serial_devices[i], "vc"))
- qemu_chr_printf(serial_hds[i], "serial%d console\n", i);
+ if (!strcmp(devname, "vc"))
+ qemu_chr_printf(serial_hds[i], "serial%d console\r\n", i);
}
}
for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
- if (parallel_devices[i][0] != '\0') {
- parallel_hds[i] = qemu_chr_open(parallel_devices[i]);
+ const char *devname = parallel_devices[i];
+ if (devname[0] != '\0' && strcmp(devname, "none")) {
+ parallel_hds[i] = qemu_chr_open(devname);
if (!parallel_hds[i]) {
fprintf(stderr, "qemu: could not open parallel device '%s'\n",
- parallel_devices[i]);
+ devname);
exit(1);
}
- if (!strcmp(parallel_devices[i], "vc"))
- qemu_chr_printf(parallel_hds[i], "parallel%d console\n", i);
+ if (!strcmp(devname, "vc"))
+ qemu_chr_printf(parallel_hds[i], "parallel%d console\r\n", i);
}
}
} else
#endif
if (loadvm)
- qemu_loadvm(loadvm);
+ do_loadvm(loadvm);
{
/* XXX: simplify init */
projects / qemu.git / blobdiff