#include <sys/mman.h>
#endif
#include "config.h"
-#include "monitor.h"
-#include "sysemu.h"
-#include "arch_init.h"
+#include "monitor/monitor.h"
+#include "sysemu/sysemu.h"
+#include "qemu/bitops.h"
+#include "qemu/bitmap.h"
+#include "sysemu/arch_init.h"
#include "audio/audio.h"
#include "hw/pc.h"
-#include "hw/pci.h"
+#include "hw/pci/pci.h"
#include "hw/audiodev.h"
-#include "kvm.h"
-#include "migration.h"
-#include "net.h"
-#include "gdbstub.h"
+#include "sysemu/kvm.h"
+#include "migration/migration.h"
+#include "exec/gdbstub.h"
#include "hw/smbios.h"
-#include "exec-memory.h"
+#include "exec/address-spaces.h"
+#include "hw/pcspk.h"
+#include "migration/page_cache.h"
+#include "qemu/config-file.h"
+#include "qmp-commands.h"
+#include "trace.h"
+#include "exec/cpu-all.h"
+
+#ifdef DEBUG_ARCH_INIT
+#define DPRINTF(fmt, ...) \
+ do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+ do { } while (0)
+#endif
#ifdef TARGET_SPARC
int graphic_width = 1024;
int graphic_depth = 15;
#endif
-const char arch_config_name[] = CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf";
#if defined(TARGET_ALPHA)
#define QEMU_ARCH QEMU_ARCH_ALPHA
#define QEMU_ARCH QEMU_ARCH_MICROBLAZE
#elif defined(TARGET_MIPS)
#define QEMU_ARCH QEMU_ARCH_MIPS
+#elif defined(TARGET_OPENRISC)
+#define QEMU_ARCH QEMU_ARCH_OPENRISC
#elif defined(TARGET_PPC)
#define QEMU_ARCH QEMU_ARCH_PPC
#elif defined(TARGET_S390X)
#define QEMU_ARCH QEMU_ARCH_SPARC
#elif defined(TARGET_XTENSA)
#define QEMU_ARCH QEMU_ARCH_XTENSA
+#elif defined(TARGET_UNICORE32)
+#define QEMU_ARCH QEMU_ARCH_UNICORE32
#endif
const uint32_t arch_type = QEMU_ARCH;
#define RAM_SAVE_FLAG_PAGE 0x08
#define RAM_SAVE_FLAG_EOS 0x10
#define RAM_SAVE_FLAG_CONTINUE 0x20
+#define RAM_SAVE_FLAG_XBZRLE 0x40
+
+#ifdef __ALTIVEC__
+#include <altivec.h>
+#define VECTYPE vector unsigned char
+#define SPLAT(p) vec_splat(vec_ld(0, p), 0)
+#define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
+/* altivec.h may redefine the bool macro as vector type.
+ * Reset it to POSIX semantics. */
+#undef bool
+#define bool _Bool
+#elif defined __SSE2__
+#include <emmintrin.h>
+#define VECTYPE __m128i
+#define SPLAT(p) _mm_set1_epi8(*(p))
+#define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
+#else
+#define VECTYPE unsigned long
+#define SPLAT(p) (*(p) * (~0UL / 255))
+#define ALL_EQ(v1, v2) ((v1) == (v2))
+#endif
+
+
+static struct defconfig_file {
+ const char *filename;
+ /* Indicates it is an user config file (disabled by -no-user-config) */
+ bool userconfig;
+} default_config_files[] = {
+ { CONFIG_QEMU_CONFDIR "/qemu.conf", true },
+ { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
+ { NULL }, /* end of list */
+};
+
+
+int qemu_read_default_config_files(bool userconfig)
+{
+ int ret;
+ struct defconfig_file *f;
+
+ for (f = default_config_files; f->filename; f++) {
+ if (!userconfig && f->userconfig) {
+ continue;
+ }
+ ret = qemu_read_config_file(f->filename);
+ if (ret < 0 && ret != -ENOENT) {
+ return ret;
+ }
+ }
+
+ return 0;
+}
-static int is_dup_page(uint8_t *page, uint8_t ch)
+static int is_dup_page(uint8_t *page)
{
- uint32_t val = ch << 24 | ch << 16 | ch << 8 | ch;
- uint32_t *array = (uint32_t *)page;
+ VECTYPE *p = (VECTYPE *)page;
+ VECTYPE val = SPLAT(page);
int i;
- for (i = 0; i < (TARGET_PAGE_SIZE / 4); i++) {
- if (array[i] != val) {
+ for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
+ if (!ALL_EQ(val, p[i])) {
return 0;
}
}
return 1;
}
-static RAMBlock *last_block;
+/* struct contains XBZRLE cache and a static page
+ used by the compression */
+static struct {
+ /* buffer used for XBZRLE encoding */
+ uint8_t *encoded_buf;
+ /* buffer for storing page content */
+ uint8_t *current_buf;
+ /* buffer used for XBZRLE decoding */
+ uint8_t *decoded_buf;
+ /* Cache for XBZRLE */
+ PageCache *cache;
+} XBZRLE = {
+ .encoded_buf = NULL,
+ .current_buf = NULL,
+ .decoded_buf = NULL,
+ .cache = NULL,
+};
+
+
+int64_t xbzrle_cache_resize(int64_t new_size)
+{
+ if (XBZRLE.cache != NULL) {
+ return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
+ TARGET_PAGE_SIZE;
+ }
+ return pow2floor(new_size);
+}
+
+/* accounting for migration statistics */
+typedef struct AccountingInfo {
+ uint64_t dup_pages;
+ uint64_t norm_pages;
+ uint64_t iterations;
+ uint64_t xbzrle_bytes;
+ uint64_t xbzrle_pages;
+ uint64_t xbzrle_cache_miss;
+ uint64_t xbzrle_overflows;
+} AccountingInfo;
+
+static AccountingInfo acct_info;
+
+static void acct_clear(void)
+{
+ memset(&acct_info, 0, sizeof(acct_info));
+}
+
+uint64_t dup_mig_bytes_transferred(void)
+{
+ return acct_info.dup_pages * TARGET_PAGE_SIZE;
+}
+
+uint64_t dup_mig_pages_transferred(void)
+{
+ return acct_info.dup_pages;
+}
+
+uint64_t norm_mig_bytes_transferred(void)
+{
+ return acct_info.norm_pages * TARGET_PAGE_SIZE;
+}
+
+uint64_t norm_mig_pages_transferred(void)
+{
+ return acct_info.norm_pages;
+}
+
+uint64_t xbzrle_mig_bytes_transferred(void)
+{
+ return acct_info.xbzrle_bytes;
+}
+
+uint64_t xbzrle_mig_pages_transferred(void)
+{
+ return acct_info.xbzrle_pages;
+}
+
+uint64_t xbzrle_mig_pages_cache_miss(void)
+{
+ return acct_info.xbzrle_cache_miss;
+}
+
+uint64_t xbzrle_mig_pages_overflow(void)
+{
+ return acct_info.xbzrle_overflows;
+}
+
+static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
+ int cont, int flag)
+{
+ size_t size;
+
+ qemu_put_be64(f, offset | cont | flag);
+ size = 8;
+
+ if (!cont) {
+ qemu_put_byte(f, strlen(block->idstr));
+ qemu_put_buffer(f, (uint8_t *)block->idstr,
+ strlen(block->idstr));
+ size += 1 + strlen(block->idstr);
+ }
+ return size;
+}
+
+#define ENCODING_FLAG_XBZRLE 0x1
+
+static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
+ ram_addr_t current_addr, RAMBlock *block,
+ ram_addr_t offset, int cont, bool last_stage)
+{
+ int encoded_len = 0, bytes_sent = -1;
+ uint8_t *prev_cached_page;
+
+ if (!cache_is_cached(XBZRLE.cache, current_addr)) {
+ if (!last_stage) {
+ cache_insert(XBZRLE.cache, current_addr,
+ g_memdup(current_data, TARGET_PAGE_SIZE));
+ }
+ acct_info.xbzrle_cache_miss++;
+ return -1;
+ }
+
+ prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
+
+ /* save current buffer into memory */
+ memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
+
+ /* XBZRLE encoding (if there is no overflow) */
+ encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
+ TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
+ TARGET_PAGE_SIZE);
+ if (encoded_len == 0) {
+ DPRINTF("Skipping unmodified page\n");
+ return 0;
+ } else if (encoded_len == -1) {
+ DPRINTF("Overflow\n");
+ acct_info.xbzrle_overflows++;
+ /* update data in the cache */
+ memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
+ return -1;
+ }
+
+ /* we need to update the data in the cache, in order to get the same data */
+ if (!last_stage) {
+ memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
+ }
+
+ /* Send XBZRLE based compressed page */
+ bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
+ qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
+ qemu_put_be16(f, encoded_len);
+ qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
+ bytes_sent += encoded_len + 1 + 2;
+ acct_info.xbzrle_pages++;
+ acct_info.xbzrle_bytes += bytes_sent;
+
+ return bytes_sent;
+}
+
+
+/* This is the last block that we have visited serching for dirty pages
+ */
+static RAMBlock *last_seen_block;
+/* This is the last block from where we have sent data */
+static RAMBlock *last_sent_block;
static ram_addr_t last_offset;
+static unsigned long *migration_bitmap;
+static uint64_t migration_dirty_pages;
+static uint32_t last_version;
+
+static inline
+ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
+ ram_addr_t start)
+{
+ unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
+ unsigned long nr = base + (start >> TARGET_PAGE_BITS);
+ unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
+
+ unsigned long next = find_next_bit(migration_bitmap, size, nr);
+
+ if (next < size) {
+ clear_bit(next, migration_bitmap);
+ migration_dirty_pages--;
+ }
+ return (next - base) << TARGET_PAGE_BITS;
+}
+
+static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
+ ram_addr_t offset)
+{
+ bool ret;
+ int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
+
+ ret = test_and_set_bit(nr, migration_bitmap);
+
+ if (!ret) {
+ migration_dirty_pages++;
+ }
+ return ret;
+}
+
+static void migration_bitmap_sync(void)
+{
+ RAMBlock *block;
+ ram_addr_t addr;
+ uint64_t num_dirty_pages_init = migration_dirty_pages;
+ MigrationState *s = migrate_get_current();
+ static int64_t start_time;
+ static int64_t num_dirty_pages_period;
+ int64_t end_time;
+
+ if (!start_time) {
+ start_time = qemu_get_clock_ms(rt_clock);
+ }
+
+ trace_migration_bitmap_sync_start();
+ memory_global_sync_dirty_bitmap(get_system_memory());
+
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+ for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
+ if (memory_region_test_and_clear_dirty(block->mr,
+ addr, TARGET_PAGE_SIZE,
+ DIRTY_MEMORY_MIGRATION)) {
+ migration_bitmap_set_dirty(block->mr, addr);
+ }
+ }
+ }
+ trace_migration_bitmap_sync_end(migration_dirty_pages
+ - num_dirty_pages_init);
+ num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
+ end_time = qemu_get_clock_ms(rt_clock);
+
+ /* more than 1 second = 1000 millisecons */
+ if (end_time > start_time + 1000) {
+ s->dirty_pages_rate = num_dirty_pages_period * 1000
+ / (end_time - start_time);
+ start_time = end_time;
+ num_dirty_pages_period = 0;
+ }
+}
+
+/*
+ * ram_save_block: Writes a page of memory to the stream f
+ *
+ * Returns: The number of bytes written.
+ * 0 means no dirty pages
+ */
-static int ram_save_block(QEMUFile *f)
+static int ram_save_block(QEMUFile *f, bool last_stage)
{
- RAMBlock *block = last_block;
+ RAMBlock *block = last_seen_block;
ram_addr_t offset = last_offset;
+ bool complete_round = false;
int bytes_sent = 0;
MemoryRegion *mr;
+ ram_addr_t current_addr;
if (!block)
- block = QLIST_FIRST(&ram_list.blocks);
+ block = QTAILQ_FIRST(&ram_list.blocks);
- do {
+ while (true) {
mr = block->mr;
- if (memory_region_get_dirty(mr, offset, DIRTY_MEMORY_MIGRATION)) {
+ offset = migration_bitmap_find_and_reset_dirty(mr, offset);
+ if (complete_round && block == last_seen_block &&
+ offset >= last_offset) {
+ break;
+ }
+ if (offset >= block->length) {
+ offset = 0;
+ block = QTAILQ_NEXT(block, next);
+ if (!block) {
+ block = QTAILQ_FIRST(&ram_list.blocks);
+ complete_round = true;
+ }
+ } else {
uint8_t *p;
- int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
-
- memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
- DIRTY_MEMORY_MIGRATION);
+ int cont = (block == last_sent_block) ?
+ RAM_SAVE_FLAG_CONTINUE : 0;
p = memory_region_get_ram_ptr(mr) + offset;
- if (is_dup_page(p, *p)) {
- qemu_put_be64(f, offset | cont | RAM_SAVE_FLAG_COMPRESS);
- if (!cont) {
- qemu_put_byte(f, strlen(block->idstr));
- qemu_put_buffer(f, (uint8_t *)block->idstr,
- strlen(block->idstr));
- }
+ /* In doubt sent page as normal */
+ bytes_sent = -1;
+ if (is_dup_page(p)) {
+ acct_info.dup_pages++;
+ bytes_sent = save_block_hdr(f, block, offset, cont,
+ RAM_SAVE_FLAG_COMPRESS);
qemu_put_byte(f, *p);
- bytes_sent = 1;
- } else {
- qemu_put_be64(f, offset | cont | RAM_SAVE_FLAG_PAGE);
- if (!cont) {
- qemu_put_byte(f, strlen(block->idstr));
- qemu_put_buffer(f, (uint8_t *)block->idstr,
- strlen(block->idstr));
+ bytes_sent += 1;
+ } else if (migrate_use_xbzrle()) {
+ current_addr = block->offset + offset;
+ bytes_sent = save_xbzrle_page(f, p, current_addr, block,
+ offset, cont, last_stage);
+ if (!last_stage) {
+ p = get_cached_data(XBZRLE.cache, current_addr);
}
- qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
- bytes_sent = TARGET_PAGE_SIZE;
}
- break;
- }
+ /* XBZRLE overflow or normal page */
+ if (bytes_sent == -1) {
+ bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
+ qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
+ bytes_sent += TARGET_PAGE_SIZE;
+ acct_info.norm_pages++;
+ }
- offset += TARGET_PAGE_SIZE;
- if (offset >= block->length) {
- offset = 0;
- block = QLIST_NEXT(block, next);
- if (!block)
- block = QLIST_FIRST(&ram_list.blocks);
+ /* if page is unmodified, continue to the next */
+ if (bytes_sent > 0) {
+ last_sent_block = block;
+ break;
+ }
}
- } while (block != last_block || offset != last_offset);
-
- last_block = block;
+ }
+ last_seen_block = block;
last_offset = offset;
return bytes_sent;
static ram_addr_t ram_save_remaining(void)
{
- RAMBlock *block;
- ram_addr_t count = 0;
-
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- ram_addr_t addr;
- for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
- if (memory_region_get_dirty(block->mr, addr,
- DIRTY_MEMORY_MIGRATION)) {
- count++;
- }
- }
- }
-
- return count;
+ return migration_dirty_pages;
}
uint64_t ram_bytes_remaining(void)
RAMBlock *block;
uint64_t total = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next)
+ QTAILQ_FOREACH(block, &ram_list.blocks, next)
total += block->length;
return total;
}
-static int block_compar(const void *a, const void *b)
+static void migration_end(void)
{
- RAMBlock * const *ablock = a;
- RAMBlock * const *bblock = b;
+ if (migration_bitmap) {
+ memory_global_dirty_log_stop();
+ g_free(migration_bitmap);
+ migration_bitmap = NULL;
+ }
- return strcmp((*ablock)->idstr, (*bblock)->idstr);
+ if (XBZRLE.cache) {
+ cache_fini(XBZRLE.cache);
+ g_free(XBZRLE.cache);
+ g_free(XBZRLE.encoded_buf);
+ g_free(XBZRLE.current_buf);
+ g_free(XBZRLE.decoded_buf);
+ XBZRLE.cache = NULL;
+ }
}
-static void sort_ram_list(void)
+static void ram_migration_cancel(void *opaque)
{
- RAMBlock *block, *nblock, **blocks;
- int n;
- n = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- ++n;
- }
- blocks = g_malloc(n * sizeof *blocks);
- n = 0;
- QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) {
- blocks[n++] = block;
- QLIST_REMOVE(block, next);
- }
- qsort(blocks, n, sizeof *blocks, block_compar);
- while (--n >= 0) {
- QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next);
- }
- g_free(blocks);
+ migration_end();
}
-int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
+static void reset_ram_globals(void)
{
- ram_addr_t addr;
- uint64_t bytes_transferred_last;
- double bwidth = 0;
- uint64_t expected_time = 0;
- int ret;
-
- if (stage < 0) {
- cpu_physical_memory_set_dirty_tracking(0);
- return 0;
- }
+ last_seen_block = NULL;
+ last_sent_block = NULL;
+ last_offset = 0;
+ last_version = ram_list.version;
+}
- memory_global_sync_dirty_bitmap(get_system_memory());
+#define MAX_WAIT 50 /* ms, half buffered_file limit */
- if (stage == 1) {
- RAMBlock *block;
- bytes_transferred = 0;
- last_block = NULL;
- last_offset = 0;
- sort_ram_list();
-
- /* Make sure all dirty bits are set */
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
- if (!memory_region_get_dirty(block->mr, addr,
- DIRTY_MEMORY_MIGRATION)) {
- memory_region_set_dirty(block->mr, addr);
- }
- }
+static int ram_save_setup(QEMUFile *f, void *opaque)
+{
+ RAMBlock *block;
+ int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
+
+ migration_bitmap = bitmap_new(ram_pages);
+ bitmap_set(migration_bitmap, 0, ram_pages);
+ migration_dirty_pages = ram_pages;
+
+ qemu_mutex_lock_ramlist();
+ bytes_transferred = 0;
+ reset_ram_globals();
+
+ if (migrate_use_xbzrle()) {
+ XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
+ TARGET_PAGE_SIZE,
+ TARGET_PAGE_SIZE);
+ if (!XBZRLE.cache) {
+ DPRINTF("Error creating cache\n");
+ return -1;
}
+ XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
+ XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
+ acct_clear();
+ }
- /* Enable dirty memory tracking */
- cpu_physical_memory_set_dirty_tracking(1);
+ memory_global_dirty_log_start();
+ migration_bitmap_sync();
- qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
+ qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- qemu_put_byte(f, strlen(block->idstr));
- qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
- qemu_put_be64(f, block->length);
- }
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+ qemu_put_byte(f, strlen(block->idstr));
+ qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
+ qemu_put_be64(f, block->length);
}
- bytes_transferred_last = bytes_transferred;
- bwidth = qemu_get_clock_ns(rt_clock);
+ qemu_mutex_unlock_ramlist();
+ qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
+
+ return 0;
+}
+static int ram_save_iterate(QEMUFile *f, void *opaque)
+{
+ int ret;
+ int i;
+ int64_t t0;
+ int total_sent = 0;
+
+ qemu_mutex_lock_ramlist();
+
+ if (ram_list.version != last_version) {
+ reset_ram_globals();
+ }
+
+ t0 = qemu_get_clock_ns(rt_clock);
+ i = 0;
while ((ret = qemu_file_rate_limit(f)) == 0) {
int bytes_sent;
- bytes_sent = ram_save_block(f);
- bytes_transferred += bytes_sent;
- if (bytes_sent == 0) { /* no more blocks */
+ bytes_sent = ram_save_block(f, false);
+ /* no more blocks to sent */
+ if (bytes_sent == 0) {
break;
}
+ total_sent += bytes_sent;
+ acct_info.iterations++;
+ /* we want to check in the 1st loop, just in case it was the 1st time
+ and we had to sync the dirty bitmap.
+ qemu_get_clock_ns() is a bit expensive, so we only check each some
+ iterations
+ */
+ if ((i & 63) == 0) {
+ uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
+ if (t1 > MAX_WAIT) {
+ DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
+ t1, i);
+ break;
+ }
+ }
+ i++;
}
+ qemu_mutex_unlock_ramlist();
+
if (ret < 0) {
+ bytes_transferred += total_sent;
return ret;
}
- bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
- bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
+ qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
+ total_sent += 8;
+ bytes_transferred += total_sent;
- /* if we haven't transferred anything this round, force expected_time to a
- * a very high value, but without crashing */
- if (bwidth == 0) {
- bwidth = 0.000001;
- }
+ return total_sent;
+}
+
+static int ram_save_complete(QEMUFile *f, void *opaque)
+{
+ qemu_mutex_lock_ramlist();
+ migration_bitmap_sync();
/* try transferring iterative blocks of memory */
- if (stage == 3) {
+
+ /* flush all remaining blocks regardless of rate limiting */
+ while (true) {
int bytes_sent;
- /* flush all remaining blocks regardless of rate limiting */
- while ((bytes_sent = ram_save_block(f)) != 0) {
- bytes_transferred += bytes_sent;
+ bytes_sent = ram_save_block(f, true);
+ /* no more blocks to sent */
+ if (bytes_sent == 0) {
+ break;
}
- cpu_physical_memory_set_dirty_tracking(0);
+ bytes_transferred += bytes_sent;
}
+ migration_end();
+ qemu_mutex_unlock_ramlist();
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
- expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+ return 0;
+}
+
+static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
+{
+ uint64_t remaining_size;
+
+ remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
+
+ if (remaining_size < max_size) {
+ migration_bitmap_sync();
+ remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
+ }
+ return remaining_size;
+}
+
+static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
+{
+ int ret, rc = 0;
+ unsigned int xh_len;
+ int xh_flags;
+
+ if (!XBZRLE.decoded_buf) {
+ XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
+ }
+
+ /* extract RLE header */
+ xh_flags = qemu_get_byte(f);
+ xh_len = qemu_get_be16(f);
+
+ if (xh_flags != ENCODING_FLAG_XBZRLE) {
+ fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
+ return -1;
+ }
- return (stage == 2) && (expected_time <= migrate_max_downtime());
+ if (xh_len > TARGET_PAGE_SIZE) {
+ fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
+ return -1;
+ }
+ /* load data and decode */
+ qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
+
+ /* decode RLE */
+ ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
+ TARGET_PAGE_SIZE);
+ if (ret == -1) {
+ fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
+ rc = -1;
+ } else if (ret > TARGET_PAGE_SIZE) {
+ fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
+ ret, TARGET_PAGE_SIZE);
+ abort();
+ }
+
+ return rc;
}
static inline void *host_from_stream_offset(QEMUFile *f,
return NULL;
}
- return block->host + offset;
+ return memory_region_get_ram_ptr(block->mr) + offset;
}
len = qemu_get_byte(f);
qemu_get_buffer(f, (uint8_t *)id, len);
id[len] = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
if (!strncmp(id, block->idstr, sizeof(id)))
- return block->host + offset;
+ return memory_region_get_ram_ptr(block->mr) + offset;
}
fprintf(stderr, "Can't find block %s!\n", id);
return NULL;
}
-int ram_load(QEMUFile *f, void *opaque, int version_id)
+static int ram_load(QEMUFile *f, void *opaque, int version_id)
{
ram_addr_t addr;
- int flags;
+ int flags, ret = 0;
int error;
+ static uint64_t seq_iter;
+
+ seq_iter++;
if (version_id < 4 || version_id > 4) {
return -EINVAL;
id[len] = 0;
length = qemu_get_be64(f);
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
if (!strncmp(id, block->idstr, sizeof(id))) {
- if (block->length != length)
- return -EINVAL;
+ if (block->length != length) {
+ ret = -EINVAL;
+ goto done;
+ }
break;
}
}
if (!block) {
fprintf(stderr, "Unknown ramblock \"%s\", cannot "
"accept migration\n", id);
- return -EINVAL;
+ ret = -EINVAL;
+ goto done;
}
total_ram_bytes -= length;
memset(host, ch, TARGET_PAGE_SIZE);
#ifndef _WIN32
if (ch == 0 &&
- (!kvm_enabled() || kvm_has_sync_mmu())) {
+ (!kvm_enabled() || kvm_has_sync_mmu()) &&
+ getpagesize() <= TARGET_PAGE_SIZE) {
qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
}
#endif
void *host;
host = host_from_stream_offset(f, addr, flags);
+ if (!host) {
+ return -EINVAL;
+ }
qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
+ } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
+ void *host = host_from_stream_offset(f, addr, flags);
+ if (!host) {
+ return -EINVAL;
+ }
+
+ if (load_xbzrle(f, addr, host) < 0) {
+ ret = -EINVAL;
+ goto done;
+ }
}
error = qemu_file_get_error(f);
if (error) {
- return error;
+ ret = error;
+ goto done;
}
} while (!(flags & RAM_SAVE_FLAG_EOS));
- return 0;
+done:
+ DPRINTF("Completed load of VM with exit code %d seq iteration "
+ "%" PRIu64 "\n", ret, seq_iter);
+ return ret;
}
+SaveVMHandlers savevm_ram_handlers = {
+ .save_live_setup = ram_save_setup,
+ .save_live_iterate = ram_save_iterate,
+ .save_live_complete = ram_save_complete,
+ .save_live_pending = ram_save_pending,
+ .load_state = ram_load,
+ .cancel = ram_migration_cancel,
+};
+
#ifdef HAS_AUDIO
struct soundhw {
const char *name;
static struct soundhw soundhw[] = {
#ifdef HAS_AUDIO_CHOICE
-#if defined(TARGET_I386) || defined(TARGET_MIPS)
+#ifdef CONFIG_PCSPK
{
"pcspk",
"PC speaker",
{
struct soundhw *c;
- if (*optarg == '?') {
+ if (is_help_option(optarg)) {
show_valid_cards:
+#ifdef HAS_AUDIO_CHOICE
printf("Valid sound card names (comma separated):\n");
for (c = soundhw; c->name; ++c) {
printf ("%-11s %s\n", c->name, c->descr);
}
printf("\n-soundhw all will enable all of the above\n");
- exit(*optarg != '?');
+#else
+ printf("Machine has no user-selectable audio hardware "
+ "(it may or may not have always-present audio hardware).\n");
+#endif
+ exit(!is_help_option(optarg));
}
else {
size_t l;
return 0;
#endif
}
+
+
+TargetInfo *qmp_query_target(Error **errp)
+{
+ TargetInfo *info = g_malloc0(sizeof(*info));
+
+ info->arch = TARGET_TYPE;
+
+ return info;
+}
projects / qemu.git / blobdiff