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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h> |
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#include <stdarg.h> |
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#include <stdlib.h> |
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#ifndef _WIN32
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#include <sys/types.h> |
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#include <sys/mman.h> |
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#endif
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#include "config.h" |
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#include "monitor/monitor.h" |
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#include "sysemu/sysemu.h" |
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#include "qemu/bitops.h" |
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#include "qemu/bitmap.h" |
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#include "sysemu/arch_init.h" |
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#include "audio/audio.h" |
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#include "hw/i386/pc.h" |
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#include "hw/pci/pci.h" |
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#include "hw/audio/audio.h" |
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#include "sysemu/kvm.h" |
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#include "migration/migration.h" |
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#include "hw/i386/smbios.h" |
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#include "exec/address-spaces.h" |
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#include "hw/audio/pcspk.h" |
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#include "migration/page_cache.h" |
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#include "qemu/config-file.h" |
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#include "qmp-commands.h" |
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#include "trace.h" |
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#include "exec/cpu-all.h" |
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#include "exec/ram_addr.h" |
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#include "hw/acpi/acpi.h" |
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#include "qemu/host-utils.h" |
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|
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#ifdef DEBUG_ARCH_INIT
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#define DPRINTF(fmt, ...) \
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do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0) |
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#endif
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#ifdef TARGET_SPARC
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int graphic_width = 1024; |
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int graphic_height = 768; |
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int graphic_depth = 8; |
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#else
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int graphic_width = 800; |
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int graphic_height = 600; |
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int graphic_depth = 32; |
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#endif
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#if defined(TARGET_ALPHA)
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#define QEMU_ARCH QEMU_ARCH_ALPHA
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#elif defined(TARGET_ARM)
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#define QEMU_ARCH QEMU_ARCH_ARM
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#elif defined(TARGET_CRIS)
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#define QEMU_ARCH QEMU_ARCH_CRIS
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#elif defined(TARGET_I386)
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#define QEMU_ARCH QEMU_ARCH_I386
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#elif defined(TARGET_M68K)
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#define QEMU_ARCH QEMU_ARCH_M68K
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#elif defined(TARGET_LM32)
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#define QEMU_ARCH QEMU_ARCH_LM32
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#elif defined(TARGET_MICROBLAZE)
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#define QEMU_ARCH QEMU_ARCH_MICROBLAZE
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#elif defined(TARGET_MIPS)
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#define QEMU_ARCH QEMU_ARCH_MIPS
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#elif defined(TARGET_MOXIE)
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#define QEMU_ARCH QEMU_ARCH_MOXIE
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#elif defined(TARGET_OPENRISC)
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#define QEMU_ARCH QEMU_ARCH_OPENRISC
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#elif defined(TARGET_PPC)
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#define QEMU_ARCH QEMU_ARCH_PPC
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#elif defined(TARGET_S390X)
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#define QEMU_ARCH QEMU_ARCH_S390X
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#elif defined(TARGET_SH4)
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#define QEMU_ARCH QEMU_ARCH_SH4
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#elif defined(TARGET_SPARC)
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#define QEMU_ARCH QEMU_ARCH_SPARC
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#elif defined(TARGET_XTENSA)
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#define QEMU_ARCH QEMU_ARCH_XTENSA
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#elif defined(TARGET_UNICORE32)
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#define QEMU_ARCH QEMU_ARCH_UNICORE32
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#endif
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const uint32_t arch_type = QEMU_ARCH;
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static bool mig_throttle_on; |
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static int dirty_rate_high_cnt; |
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static void check_guest_throttling(void); |
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|
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/***********************************************************/
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/* ram save/restore */
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#define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */ |
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#define RAM_SAVE_FLAG_COMPRESS 0x02 |
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#define RAM_SAVE_FLAG_MEM_SIZE 0x04 |
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#define RAM_SAVE_FLAG_PAGE 0x08 |
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#define RAM_SAVE_FLAG_EOS 0x10 |
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#define RAM_SAVE_FLAG_CONTINUE 0x20 |
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#define RAM_SAVE_FLAG_XBZRLE 0x40 |
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/* 0x80 is reserved in migration.h start with 0x100 next */
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static struct defconfig_file { |
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const char *filename; |
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/* Indicates it is an user config file (disabled by -no-user-config) */
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bool userconfig;
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} default_config_files[] = {
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{ CONFIG_QEMU_CONFDIR "/qemu.conf", true },
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{ CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true },
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{ NULL }, /* end of list */
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}; |
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int qemu_read_default_config_files(bool userconfig) |
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{
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int ret;
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struct defconfig_file *f;
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for (f = default_config_files; f->filename; f++) {
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if (!userconfig && f->userconfig) {
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continue;
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} |
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ret = qemu_read_config_file(f->filename); |
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if (ret < 0 && ret != -ENOENT) { |
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return ret;
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} |
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} |
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return 0; |
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} |
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static inline bool is_zero_range(uint8_t *p, uint64_t size) |
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{
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return buffer_find_nonzero_offset(p, size) == size;
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} |
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/* struct contains XBZRLE cache and a static page
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used by the compression */
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static struct { |
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/* buffer used for XBZRLE encoding */
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uint8_t *encoded_buf; |
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/* buffer for storing page content */
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uint8_t *current_buf; |
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/* Cache for XBZRLE */
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PageCache *cache; |
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} XBZRLE = {
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.encoded_buf = NULL,
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.current_buf = NULL,
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.cache = NULL,
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}; |
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/* buffer used for XBZRLE decoding */
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static uint8_t *xbzrle_decoded_buf;
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int64_t xbzrle_cache_resize(int64_t new_size) |
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{
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if (new_size < TARGET_PAGE_SIZE) {
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return -1; |
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} |
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if (XBZRLE.cache != NULL) { |
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return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
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TARGET_PAGE_SIZE; |
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} |
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return pow2floor(new_size);
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} |
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|
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/* accounting for migration statistics */
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typedef struct AccountingInfo { |
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uint64_t dup_pages; |
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uint64_t skipped_pages; |
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uint64_t norm_pages; |
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uint64_t iterations; |
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uint64_t xbzrle_bytes; |
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uint64_t xbzrle_pages; |
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uint64_t xbzrle_cache_miss; |
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uint64_t xbzrle_overflows; |
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} AccountingInfo; |
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static AccountingInfo acct_info;
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static void acct_clear(void) |
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{
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memset(&acct_info, 0, sizeof(acct_info)); |
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} |
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uint64_t dup_mig_bytes_transferred(void)
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{
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return acct_info.dup_pages * TARGET_PAGE_SIZE;
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} |
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uint64_t dup_mig_pages_transferred(void)
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{
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return acct_info.dup_pages;
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} |
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uint64_t skipped_mig_bytes_transferred(void)
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{
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return acct_info.skipped_pages * TARGET_PAGE_SIZE;
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} |
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uint64_t skipped_mig_pages_transferred(void)
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{
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return acct_info.skipped_pages;
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} |
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uint64_t norm_mig_bytes_transferred(void)
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{
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return acct_info.norm_pages * TARGET_PAGE_SIZE;
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} |
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uint64_t norm_mig_pages_transferred(void)
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{
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return acct_info.norm_pages;
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} |
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uint64_t xbzrle_mig_bytes_transferred(void)
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{
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return acct_info.xbzrle_bytes;
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} |
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uint64_t xbzrle_mig_pages_transferred(void)
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{
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return acct_info.xbzrle_pages;
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} |
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uint64_t xbzrle_mig_pages_cache_miss(void)
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{
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return acct_info.xbzrle_cache_miss;
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} |
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uint64_t xbzrle_mig_pages_overflow(void)
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{
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return acct_info.xbzrle_overflows;
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} |
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static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
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int cont, int flag) |
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{
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size_t size; |
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qemu_put_be64(f, offset | cont | flag); |
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size = 8;
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if (!cont) {
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qemu_put_byte(f, strlen(block->idstr)); |
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qemu_put_buffer(f, (uint8_t *)block->idstr, |
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strlen(block->idstr)); |
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size += 1 + strlen(block->idstr);
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} |
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return size;
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} |
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#define ENCODING_FLAG_XBZRLE 0x1 |
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static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data, |
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ram_addr_t current_addr, RAMBlock *block, |
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ram_addr_t offset, int cont, bool last_stage) |
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{
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int encoded_len = 0, bytes_sent = -1; |
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uint8_t *prev_cached_page; |
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if (!cache_is_cached(XBZRLE.cache, current_addr)) {
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if (!last_stage) {
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if (cache_insert(XBZRLE.cache, current_addr, current_data) == -1) { |
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return -1; |
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} |
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} |
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acct_info.xbzrle_cache_miss++; |
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return -1; |
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} |
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prev_cached_page = get_cached_data(XBZRLE.cache, current_addr); |
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/* save current buffer into memory */
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memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE); |
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/* XBZRLE encoding (if there is no overflow) */
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encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf, |
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TARGET_PAGE_SIZE, XBZRLE.encoded_buf, |
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TARGET_PAGE_SIZE); |
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if (encoded_len == 0) { |
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DPRINTF("Skipping unmodified page\n");
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return 0; |
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} else if (encoded_len == -1) { |
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DPRINTF("Overflow\n");
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acct_info.xbzrle_overflows++; |
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/* update data in the cache */
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memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE); |
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return -1; |
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} |
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|
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/* we need to update the data in the cache, in order to get the same data */
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if (!last_stage) {
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memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); |
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} |
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|
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/* Send XBZRLE based compressed page */
|
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bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); |
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qemu_put_byte(f, ENCODING_FLAG_XBZRLE); |
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qemu_put_be16(f, encoded_len); |
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qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); |
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bytes_sent += encoded_len + 1 + 2; |
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acct_info.xbzrle_pages++; |
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acct_info.xbzrle_bytes += bytes_sent; |
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return bytes_sent;
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} |
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|
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|
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/* This is the last block that we have visited serching for dirty pages
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*/
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static RAMBlock *last_seen_block;
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/* This is the last block from where we have sent data */
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static RAMBlock *last_sent_block;
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static ram_addr_t last_offset;
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static unsigned long *migration_bitmap; |
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static uint64_t migration_dirty_pages;
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static uint32_t last_version;
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static bool ram_bulk_stage; |
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|
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static inline |
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ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr, |
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ram_addr_t start) |
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{
|
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unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS; |
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unsigned long nr = base + (start >> TARGET_PAGE_BITS); |
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uint64_t mr_size = TARGET_PAGE_ALIGN(memory_region_size(mr)); |
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unsigned long size = base + (mr_size >> TARGET_PAGE_BITS); |
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|
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unsigned long next; |
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|
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if (ram_bulk_stage && nr > base) {
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next = nr + 1;
|
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} else {
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next = find_next_bit(migration_bitmap, size, nr); |
| 359 |
} |
| 360 |
|
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if (next < size) {
|
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clear_bit(next, migration_bitmap); |
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migration_dirty_pages--; |
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} |
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return (next - base) << TARGET_PAGE_BITS;
|
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} |
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|
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static inline bool migration_bitmap_set_dirty(ram_addr_t addr) |
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{
|
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bool ret;
|
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int nr = addr >> TARGET_PAGE_BITS;
|
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|
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ret = test_and_set_bit(nr, migration_bitmap); |
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|
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if (!ret) {
|
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migration_dirty_pages++; |
| 377 |
} |
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return ret;
|
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} |
| 380 |
|
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static void migration_bitmap_sync_range(ram_addr_t start, ram_addr_t length) |
| 382 |
{
|
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ram_addr_t addr; |
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unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); |
| 385 |
|
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/* start address is aligned at the start of a word? */
|
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if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
|
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int k;
|
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int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
|
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unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]; |
| 391 |
|
| 392 |
for (k = page; k < page + nr; k++) {
|
| 393 |
if (src[k]) {
|
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unsigned long new_dirty; |
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new_dirty = ~migration_bitmap[k]; |
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migration_bitmap[k] |= src[k]; |
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new_dirty &= src[k]; |
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migration_dirty_pages += ctpopl(new_dirty); |
| 399 |
src[k] = 0;
|
| 400 |
} |
| 401 |
} |
| 402 |
} else {
|
| 403 |
for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { |
| 404 |
if (cpu_physical_memory_get_dirty(start + addr,
|
| 405 |
TARGET_PAGE_SIZE, |
| 406 |
DIRTY_MEMORY_MIGRATION)) {
|
| 407 |
cpu_physical_memory_reset_dirty(start + addr, |
| 408 |
TARGET_PAGE_SIZE, |
| 409 |
DIRTY_MEMORY_MIGRATION); |
| 410 |
migration_bitmap_set_dirty(start + addr); |
| 411 |
} |
| 412 |
} |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
|
| 417 |
/* Needs iothread lock! */
|
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|
| 419 |
static void migration_bitmap_sync(void) |
| 420 |
{
|
| 421 |
RAMBlock *block; |
| 422 |
uint64_t num_dirty_pages_init = migration_dirty_pages; |
| 423 |
MigrationState *s = migrate_get_current(); |
| 424 |
static int64_t start_time;
|
| 425 |
static int64_t bytes_xfer_prev;
|
| 426 |
static int64_t num_dirty_pages_period;
|
| 427 |
int64_t end_time; |
| 428 |
int64_t bytes_xfer_now; |
| 429 |
|
| 430 |
if (!bytes_xfer_prev) {
|
| 431 |
bytes_xfer_prev = ram_bytes_transferred(); |
| 432 |
} |
| 433 |
|
| 434 |
if (!start_time) {
|
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start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 436 |
} |
| 437 |
|
| 438 |
trace_migration_bitmap_sync_start(); |
| 439 |
address_space_sync_dirty_bitmap(&address_space_memory); |
| 440 |
|
| 441 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 442 |
migration_bitmap_sync_range(block->mr->ram_addr, block->length); |
| 443 |
} |
| 444 |
trace_migration_bitmap_sync_end(migration_dirty_pages |
| 445 |
- num_dirty_pages_init); |
| 446 |
num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init; |
| 447 |
end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 448 |
|
| 449 |
/* more than 1 second = 1000 millisecons */
|
| 450 |
if (end_time > start_time + 1000) { |
| 451 |
if (migrate_auto_converge()) {
|
| 452 |
/* The following detection logic can be refined later. For now:
|
| 453 |
Check to see if the dirtied bytes is 50% more than the approx.
|
| 454 |
amount of bytes that just got transferred since the last time we
|
| 455 |
were in this routine. If that happens >N times (for now N==4)
|
| 456 |
we turn on the throttle down logic */
|
| 457 |
bytes_xfer_now = ram_bytes_transferred(); |
| 458 |
if (s->dirty_pages_rate &&
|
| 459 |
(num_dirty_pages_period * TARGET_PAGE_SIZE > |
| 460 |
(bytes_xfer_now - bytes_xfer_prev)/2) &&
|
| 461 |
(dirty_rate_high_cnt++ > 4)) {
|
| 462 |
trace_migration_throttle(); |
| 463 |
mig_throttle_on = true;
|
| 464 |
dirty_rate_high_cnt = 0;
|
| 465 |
} |
| 466 |
bytes_xfer_prev = bytes_xfer_now; |
| 467 |
} else {
|
| 468 |
mig_throttle_on = false;
|
| 469 |
} |
| 470 |
s->dirty_pages_rate = num_dirty_pages_period * 1000
|
| 471 |
/ (end_time - start_time); |
| 472 |
s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE; |
| 473 |
start_time = end_time; |
| 474 |
num_dirty_pages_period = 0;
|
| 475 |
} |
| 476 |
} |
| 477 |
|
| 478 |
/*
|
| 479 |
* ram_save_block: Writes a page of memory to the stream f
|
| 480 |
*
|
| 481 |
* Returns: The number of bytes written.
|
| 482 |
* 0 means no dirty pages
|
| 483 |
*/
|
| 484 |
|
| 485 |
static int ram_save_block(QEMUFile *f, bool last_stage) |
| 486 |
{
|
| 487 |
RAMBlock *block = last_seen_block; |
| 488 |
ram_addr_t offset = last_offset; |
| 489 |
bool complete_round = false; |
| 490 |
int bytes_sent = 0; |
| 491 |
MemoryRegion *mr; |
| 492 |
ram_addr_t current_addr; |
| 493 |
|
| 494 |
if (!block)
|
| 495 |
block = QTAILQ_FIRST(&ram_list.blocks); |
| 496 |
|
| 497 |
while (true) { |
| 498 |
mr = block->mr; |
| 499 |
offset = migration_bitmap_find_and_reset_dirty(mr, offset); |
| 500 |
if (complete_round && block == last_seen_block &&
|
| 501 |
offset >= last_offset) {
|
| 502 |
break;
|
| 503 |
} |
| 504 |
if (offset >= block->length) {
|
| 505 |
offset = 0;
|
| 506 |
block = QTAILQ_NEXT(block, next); |
| 507 |
if (!block) {
|
| 508 |
block = QTAILQ_FIRST(&ram_list.blocks); |
| 509 |
complete_round = true;
|
| 510 |
ram_bulk_stage = false;
|
| 511 |
} |
| 512 |
} else {
|
| 513 |
int ret;
|
| 514 |
uint8_t *p; |
| 515 |
int cont = (block == last_sent_block) ?
|
| 516 |
RAM_SAVE_FLAG_CONTINUE : 0;
|
| 517 |
|
| 518 |
p = memory_region_get_ram_ptr(mr) + offset; |
| 519 |
|
| 520 |
/* In doubt sent page as normal */
|
| 521 |
bytes_sent = -1;
|
| 522 |
ret = ram_control_save_page(f, block->offset, |
| 523 |
offset, TARGET_PAGE_SIZE, &bytes_sent); |
| 524 |
|
| 525 |
if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
|
| 526 |
if (ret != RAM_SAVE_CONTROL_DELAYED) {
|
| 527 |
if (bytes_sent > 0) { |
| 528 |
acct_info.norm_pages++; |
| 529 |
} else if (bytes_sent == 0) { |
| 530 |
acct_info.dup_pages++; |
| 531 |
} |
| 532 |
} |
| 533 |
} else if (is_zero_range(p, TARGET_PAGE_SIZE)) { |
| 534 |
acct_info.dup_pages++; |
| 535 |
bytes_sent = save_block_hdr(f, block, offset, cont, |
| 536 |
RAM_SAVE_FLAG_COMPRESS); |
| 537 |
qemu_put_byte(f, 0);
|
| 538 |
bytes_sent++; |
| 539 |
} else if (!ram_bulk_stage && migrate_use_xbzrle()) { |
| 540 |
current_addr = block->offset + offset; |
| 541 |
bytes_sent = save_xbzrle_page(f, p, current_addr, block, |
| 542 |
offset, cont, last_stage); |
| 543 |
if (!last_stage) {
|
| 544 |
p = get_cached_data(XBZRLE.cache, current_addr); |
| 545 |
} |
| 546 |
} |
| 547 |
|
| 548 |
/* XBZRLE overflow or normal page */
|
| 549 |
if (bytes_sent == -1) { |
| 550 |
bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE); |
| 551 |
qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE); |
| 552 |
bytes_sent += TARGET_PAGE_SIZE; |
| 553 |
acct_info.norm_pages++; |
| 554 |
} |
| 555 |
|
| 556 |
/* if page is unmodified, continue to the next */
|
| 557 |
if (bytes_sent > 0) { |
| 558 |
last_sent_block = block; |
| 559 |
break;
|
| 560 |
} |
| 561 |
} |
| 562 |
} |
| 563 |
last_seen_block = block; |
| 564 |
last_offset = offset; |
| 565 |
|
| 566 |
return bytes_sent;
|
| 567 |
} |
| 568 |
|
| 569 |
static uint64_t bytes_transferred;
|
| 570 |
|
| 571 |
void acct_update_position(QEMUFile *f, size_t size, bool zero) |
| 572 |
{
|
| 573 |
uint64_t pages = size / TARGET_PAGE_SIZE; |
| 574 |
if (zero) {
|
| 575 |
acct_info.dup_pages += pages; |
| 576 |
} else {
|
| 577 |
acct_info.norm_pages += pages; |
| 578 |
bytes_transferred += size; |
| 579 |
qemu_update_position(f, size); |
| 580 |
} |
| 581 |
} |
| 582 |
|
| 583 |
static ram_addr_t ram_save_remaining(void) |
| 584 |
{
|
| 585 |
return migration_dirty_pages;
|
| 586 |
} |
| 587 |
|
| 588 |
uint64_t ram_bytes_remaining(void)
|
| 589 |
{
|
| 590 |
return ram_save_remaining() * TARGET_PAGE_SIZE;
|
| 591 |
} |
| 592 |
|
| 593 |
uint64_t ram_bytes_transferred(void)
|
| 594 |
{
|
| 595 |
return bytes_transferred;
|
| 596 |
} |
| 597 |
|
| 598 |
uint64_t ram_bytes_total(void)
|
| 599 |
{
|
| 600 |
RAMBlock *block; |
| 601 |
uint64_t total = 0;
|
| 602 |
|
| 603 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) |
| 604 |
total += block->length; |
| 605 |
|
| 606 |
return total;
|
| 607 |
} |
| 608 |
|
| 609 |
void free_xbzrle_decoded_buf(void) |
| 610 |
{
|
| 611 |
g_free(xbzrle_decoded_buf); |
| 612 |
xbzrle_decoded_buf = NULL;
|
| 613 |
} |
| 614 |
|
| 615 |
static void migration_end(void) |
| 616 |
{
|
| 617 |
if (migration_bitmap) {
|
| 618 |
memory_global_dirty_log_stop(); |
| 619 |
g_free(migration_bitmap); |
| 620 |
migration_bitmap = NULL;
|
| 621 |
} |
| 622 |
|
| 623 |
if (XBZRLE.cache) {
|
| 624 |
cache_fini(XBZRLE.cache); |
| 625 |
g_free(XBZRLE.cache); |
| 626 |
g_free(XBZRLE.encoded_buf); |
| 627 |
g_free(XBZRLE.current_buf); |
| 628 |
XBZRLE.cache = NULL;
|
| 629 |
XBZRLE.encoded_buf = NULL;
|
| 630 |
XBZRLE.current_buf = NULL;
|
| 631 |
} |
| 632 |
} |
| 633 |
|
| 634 |
static void ram_migration_cancel(void *opaque) |
| 635 |
{
|
| 636 |
migration_end(); |
| 637 |
} |
| 638 |
|
| 639 |
static void reset_ram_globals(void) |
| 640 |
{
|
| 641 |
last_seen_block = NULL;
|
| 642 |
last_sent_block = NULL;
|
| 643 |
last_offset = 0;
|
| 644 |
last_version = ram_list.version; |
| 645 |
ram_bulk_stage = true;
|
| 646 |
} |
| 647 |
|
| 648 |
#define MAX_WAIT 50 /* ms, half buffered_file limit */ |
| 649 |
|
| 650 |
static int ram_save_setup(QEMUFile *f, void *opaque) |
| 651 |
{
|
| 652 |
RAMBlock *block; |
| 653 |
int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS; |
| 654 |
|
| 655 |
migration_bitmap = bitmap_new(ram_pages); |
| 656 |
bitmap_set(migration_bitmap, 0, ram_pages);
|
| 657 |
migration_dirty_pages = ram_pages; |
| 658 |
mig_throttle_on = false;
|
| 659 |
dirty_rate_high_cnt = 0;
|
| 660 |
|
| 661 |
if (migrate_use_xbzrle()) {
|
| 662 |
XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() / |
| 663 |
TARGET_PAGE_SIZE, |
| 664 |
TARGET_PAGE_SIZE); |
| 665 |
if (!XBZRLE.cache) {
|
| 666 |
DPRINTF("Error creating cache\n");
|
| 667 |
return -1; |
| 668 |
} |
| 669 |
|
| 670 |
/* We prefer not to abort if there is no memory */
|
| 671 |
XBZRLE.encoded_buf = g_try_malloc0(TARGET_PAGE_SIZE); |
| 672 |
if (!XBZRLE.encoded_buf) {
|
| 673 |
DPRINTF("Error allocating encoded_buf\n");
|
| 674 |
return -1; |
| 675 |
} |
| 676 |
|
| 677 |
XBZRLE.current_buf = g_try_malloc(TARGET_PAGE_SIZE); |
| 678 |
if (!XBZRLE.current_buf) {
|
| 679 |
DPRINTF("Error allocating current_buf\n");
|
| 680 |
g_free(XBZRLE.encoded_buf); |
| 681 |
XBZRLE.encoded_buf = NULL;
|
| 682 |
return -1; |
| 683 |
} |
| 684 |
|
| 685 |
acct_clear(); |
| 686 |
} |
| 687 |
|
| 688 |
qemu_mutex_lock_iothread(); |
| 689 |
qemu_mutex_lock_ramlist(); |
| 690 |
bytes_transferred = 0;
|
| 691 |
reset_ram_globals(); |
| 692 |
|
| 693 |
memory_global_dirty_log_start(); |
| 694 |
migration_bitmap_sync(); |
| 695 |
qemu_mutex_unlock_iothread(); |
| 696 |
|
| 697 |
qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); |
| 698 |
|
| 699 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 700 |
qemu_put_byte(f, strlen(block->idstr)); |
| 701 |
qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); |
| 702 |
qemu_put_be64(f, block->length); |
| 703 |
} |
| 704 |
|
| 705 |
qemu_mutex_unlock_ramlist(); |
| 706 |
|
| 707 |
ram_control_before_iterate(f, RAM_CONTROL_SETUP); |
| 708 |
ram_control_after_iterate(f, RAM_CONTROL_SETUP); |
| 709 |
|
| 710 |
qemu_put_be64(f, RAM_SAVE_FLAG_EOS); |
| 711 |
|
| 712 |
return 0; |
| 713 |
} |
| 714 |
|
| 715 |
static int ram_save_iterate(QEMUFile *f, void *opaque) |
| 716 |
{
|
| 717 |
int ret;
|
| 718 |
int i;
|
| 719 |
int64_t t0; |
| 720 |
int total_sent = 0; |
| 721 |
|
| 722 |
qemu_mutex_lock_ramlist(); |
| 723 |
|
| 724 |
if (ram_list.version != last_version) {
|
| 725 |
reset_ram_globals(); |
| 726 |
} |
| 727 |
|
| 728 |
ram_control_before_iterate(f, RAM_CONTROL_ROUND); |
| 729 |
|
| 730 |
t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
| 731 |
i = 0;
|
| 732 |
while ((ret = qemu_file_rate_limit(f)) == 0) { |
| 733 |
int bytes_sent;
|
| 734 |
|
| 735 |
bytes_sent = ram_save_block(f, false);
|
| 736 |
/* no more blocks to sent */
|
| 737 |
if (bytes_sent == 0) { |
| 738 |
break;
|
| 739 |
} |
| 740 |
total_sent += bytes_sent; |
| 741 |
acct_info.iterations++; |
| 742 |
check_guest_throttling(); |
| 743 |
/* we want to check in the 1st loop, just in case it was the 1st time
|
| 744 |
and we had to sync the dirty bitmap.
|
| 745 |
qemu_get_clock_ns() is a bit expensive, so we only check each some
|
| 746 |
iterations
|
| 747 |
*/
|
| 748 |
if ((i & 63) == 0) { |
| 749 |
uint64_t t1 = (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - t0) / 1000000;
|
| 750 |
if (t1 > MAX_WAIT) {
|
| 751 |
DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n", |
| 752 |
t1, i); |
| 753 |
break;
|
| 754 |
} |
| 755 |
} |
| 756 |
i++; |
| 757 |
} |
| 758 |
|
| 759 |
qemu_mutex_unlock_ramlist(); |
| 760 |
|
| 761 |
/*
|
| 762 |
* Must occur before EOS (or any QEMUFile operation)
|
| 763 |
* because of RDMA protocol.
|
| 764 |
*/
|
| 765 |
ram_control_after_iterate(f, RAM_CONTROL_ROUND); |
| 766 |
|
| 767 |
bytes_transferred += total_sent; |
| 768 |
|
| 769 |
/*
|
| 770 |
* Do not count these 8 bytes into total_sent, so that we can
|
| 771 |
* return 0 if no page had been dirtied.
|
| 772 |
*/
|
| 773 |
qemu_put_be64(f, RAM_SAVE_FLAG_EOS); |
| 774 |
bytes_transferred += 8;
|
| 775 |
|
| 776 |
ret = qemu_file_get_error(f); |
| 777 |
if (ret < 0) { |
| 778 |
return ret;
|
| 779 |
} |
| 780 |
|
| 781 |
return total_sent;
|
| 782 |
} |
| 783 |
|
| 784 |
static int ram_save_complete(QEMUFile *f, void *opaque) |
| 785 |
{
|
| 786 |
qemu_mutex_lock_ramlist(); |
| 787 |
migration_bitmap_sync(); |
| 788 |
|
| 789 |
ram_control_before_iterate(f, RAM_CONTROL_FINISH); |
| 790 |
|
| 791 |
/* try transferring iterative blocks of memory */
|
| 792 |
|
| 793 |
/* flush all remaining blocks regardless of rate limiting */
|
| 794 |
while (true) { |
| 795 |
int bytes_sent;
|
| 796 |
|
| 797 |
bytes_sent = ram_save_block(f, true);
|
| 798 |
/* no more blocks to sent */
|
| 799 |
if (bytes_sent == 0) { |
| 800 |
break;
|
| 801 |
} |
| 802 |
bytes_transferred += bytes_sent; |
| 803 |
} |
| 804 |
|
| 805 |
ram_control_after_iterate(f, RAM_CONTROL_FINISH); |
| 806 |
migration_end(); |
| 807 |
|
| 808 |
qemu_mutex_unlock_ramlist(); |
| 809 |
qemu_put_be64(f, RAM_SAVE_FLAG_EOS); |
| 810 |
|
| 811 |
return 0; |
| 812 |
} |
| 813 |
|
| 814 |
static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size) |
| 815 |
{
|
| 816 |
uint64_t remaining_size; |
| 817 |
|
| 818 |
remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; |
| 819 |
|
| 820 |
if (remaining_size < max_size) {
|
| 821 |
qemu_mutex_lock_iothread(); |
| 822 |
migration_bitmap_sync(); |
| 823 |
qemu_mutex_unlock_iothread(); |
| 824 |
remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; |
| 825 |
} |
| 826 |
return remaining_size;
|
| 827 |
} |
| 828 |
|
| 829 |
static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) |
| 830 |
{
|
| 831 |
int ret, rc = 0; |
| 832 |
unsigned int xh_len; |
| 833 |
int xh_flags;
|
| 834 |
|
| 835 |
if (!xbzrle_decoded_buf) {
|
| 836 |
xbzrle_decoded_buf = g_malloc(TARGET_PAGE_SIZE); |
| 837 |
} |
| 838 |
|
| 839 |
/* extract RLE header */
|
| 840 |
xh_flags = qemu_get_byte(f); |
| 841 |
xh_len = qemu_get_be16(f); |
| 842 |
|
| 843 |
if (xh_flags != ENCODING_FLAG_XBZRLE) {
|
| 844 |
fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
|
| 845 |
return -1; |
| 846 |
} |
| 847 |
|
| 848 |
if (xh_len > TARGET_PAGE_SIZE) {
|
| 849 |
fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
|
| 850 |
return -1; |
| 851 |
} |
| 852 |
/* load data and decode */
|
| 853 |
qemu_get_buffer(f, xbzrle_decoded_buf, xh_len); |
| 854 |
|
| 855 |
/* decode RLE */
|
| 856 |
ret = xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host, |
| 857 |
TARGET_PAGE_SIZE); |
| 858 |
if (ret == -1) { |
| 859 |
fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
|
| 860 |
rc = -1;
|
| 861 |
} else if (ret > TARGET_PAGE_SIZE) { |
| 862 |
fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
|
| 863 |
ret, TARGET_PAGE_SIZE); |
| 864 |
abort(); |
| 865 |
} |
| 866 |
|
| 867 |
return rc;
|
| 868 |
} |
| 869 |
|
| 870 |
static inline void *host_from_stream_offset(QEMUFile *f, |
| 871 |
ram_addr_t offset, |
| 872 |
int flags)
|
| 873 |
{
|
| 874 |
static RAMBlock *block = NULL; |
| 875 |
char id[256]; |
| 876 |
uint8_t len; |
| 877 |
|
| 878 |
if (flags & RAM_SAVE_FLAG_CONTINUE) {
|
| 879 |
if (!block) {
|
| 880 |
fprintf(stderr, "Ack, bad migration stream!\n");
|
| 881 |
return NULL; |
| 882 |
} |
| 883 |
|
| 884 |
return memory_region_get_ram_ptr(block->mr) + offset;
|
| 885 |
} |
| 886 |
|
| 887 |
len = qemu_get_byte(f); |
| 888 |
qemu_get_buffer(f, (uint8_t *)id, len); |
| 889 |
id[len] = 0;
|
| 890 |
|
| 891 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 892 |
if (!strncmp(id, block->idstr, sizeof(id))) |
| 893 |
return memory_region_get_ram_ptr(block->mr) + offset;
|
| 894 |
} |
| 895 |
|
| 896 |
fprintf(stderr, "Can't find block %s!\n", id);
|
| 897 |
return NULL; |
| 898 |
} |
| 899 |
|
| 900 |
/*
|
| 901 |
* If a page (or a whole RDMA chunk) has been
|
| 902 |
* determined to be zero, then zap it.
|
| 903 |
*/
|
| 904 |
void ram_handle_compressed(void *host, uint8_t ch, uint64_t size) |
| 905 |
{
|
| 906 |
if (ch != 0 || !is_zero_range(host, size)) { |
| 907 |
memset(host, ch, size); |
| 908 |
} |
| 909 |
} |
| 910 |
|
| 911 |
static int ram_load(QEMUFile *f, void *opaque, int version_id) |
| 912 |
{
|
| 913 |
ram_addr_t addr; |
| 914 |
int flags, ret = 0; |
| 915 |
int error;
|
| 916 |
static uint64_t seq_iter;
|
| 917 |
|
| 918 |
seq_iter++; |
| 919 |
|
| 920 |
if (version_id < 4 || version_id > 4) { |
| 921 |
return -EINVAL;
|
| 922 |
} |
| 923 |
|
| 924 |
do {
|
| 925 |
addr = qemu_get_be64(f); |
| 926 |
|
| 927 |
flags = addr & ~TARGET_PAGE_MASK; |
| 928 |
addr &= TARGET_PAGE_MASK; |
| 929 |
|
| 930 |
if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
|
| 931 |
if (version_id == 4) { |
| 932 |
/* Synchronize RAM block list */
|
| 933 |
char id[256]; |
| 934 |
ram_addr_t length; |
| 935 |
ram_addr_t total_ram_bytes = addr; |
| 936 |
|
| 937 |
while (total_ram_bytes) {
|
| 938 |
RAMBlock *block; |
| 939 |
uint8_t len; |
| 940 |
|
| 941 |
len = qemu_get_byte(f); |
| 942 |
qemu_get_buffer(f, (uint8_t *)id, len); |
| 943 |
id[len] = 0;
|
| 944 |
length = qemu_get_be64(f); |
| 945 |
|
| 946 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 947 |
if (!strncmp(id, block->idstr, sizeof(id))) { |
| 948 |
if (block->length != length) {
|
| 949 |
fprintf(stderr, |
| 950 |
"Length mismatch: %s: " RAM_ADDR_FMT
|
| 951 |
" in != " RAM_ADDR_FMT "\n", id, length, |
| 952 |
block->length); |
| 953 |
ret = -EINVAL; |
| 954 |
goto done;
|
| 955 |
} |
| 956 |
break;
|
| 957 |
} |
| 958 |
} |
| 959 |
|
| 960 |
if (!block) {
|
| 961 |
fprintf(stderr, "Unknown ramblock \"%s\", cannot "
|
| 962 |
"accept migration\n", id);
|
| 963 |
ret = -EINVAL; |
| 964 |
goto done;
|
| 965 |
} |
| 966 |
|
| 967 |
total_ram_bytes -= length; |
| 968 |
} |
| 969 |
} |
| 970 |
} |
| 971 |
|
| 972 |
if (flags & RAM_SAVE_FLAG_COMPRESS) {
|
| 973 |
void *host;
|
| 974 |
uint8_t ch; |
| 975 |
|
| 976 |
host = host_from_stream_offset(f, addr, flags); |
| 977 |
if (!host) {
|
| 978 |
return -EINVAL;
|
| 979 |
} |
| 980 |
|
| 981 |
ch = qemu_get_byte(f); |
| 982 |
ram_handle_compressed(host, ch, TARGET_PAGE_SIZE); |
| 983 |
} else if (flags & RAM_SAVE_FLAG_PAGE) { |
| 984 |
void *host;
|
| 985 |
|
| 986 |
host = host_from_stream_offset(f, addr, flags); |
| 987 |
if (!host) {
|
| 988 |
return -EINVAL;
|
| 989 |
} |
| 990 |
|
| 991 |
qemu_get_buffer(f, host, TARGET_PAGE_SIZE); |
| 992 |
} else if (flags & RAM_SAVE_FLAG_XBZRLE) { |
| 993 |
void *host = host_from_stream_offset(f, addr, flags);
|
| 994 |
if (!host) {
|
| 995 |
return -EINVAL;
|
| 996 |
} |
| 997 |
|
| 998 |
if (load_xbzrle(f, addr, host) < 0) { |
| 999 |
ret = -EINVAL; |
| 1000 |
goto done;
|
| 1001 |
} |
| 1002 |
} else if (flags & RAM_SAVE_FLAG_HOOK) { |
| 1003 |
ram_control_load_hook(f, flags); |
| 1004 |
} |
| 1005 |
error = qemu_file_get_error(f); |
| 1006 |
if (error) {
|
| 1007 |
ret = error; |
| 1008 |
goto done;
|
| 1009 |
} |
| 1010 |
} while (!(flags & RAM_SAVE_FLAG_EOS));
|
| 1011 |
|
| 1012 |
done:
|
| 1013 |
DPRINTF("Completed load of VM with exit code %d seq iteration "
|
| 1014 |
"%" PRIu64 "\n", ret, seq_iter); |
| 1015 |
return ret;
|
| 1016 |
} |
| 1017 |
|
| 1018 |
SaveVMHandlers savevm_ram_handlers = {
|
| 1019 |
.save_live_setup = ram_save_setup, |
| 1020 |
.save_live_iterate = ram_save_iterate, |
| 1021 |
.save_live_complete = ram_save_complete, |
| 1022 |
.save_live_pending = ram_save_pending, |
| 1023 |
.load_state = ram_load, |
| 1024 |
.cancel = ram_migration_cancel, |
| 1025 |
}; |
| 1026 |
|
| 1027 |
struct soundhw {
|
| 1028 |
const char *name; |
| 1029 |
const char *descr; |
| 1030 |
int enabled;
|
| 1031 |
int isa;
|
| 1032 |
union {
|
| 1033 |
int (*init_isa) (ISABus *bus);
|
| 1034 |
int (*init_pci) (PCIBus *bus);
|
| 1035 |
} init; |
| 1036 |
}; |
| 1037 |
|
| 1038 |
static struct soundhw soundhw[9]; |
| 1039 |
static int soundhw_count; |
| 1040 |
|
| 1041 |
void isa_register_soundhw(const char *name, const char *descr, |
| 1042 |
int (*init_isa)(ISABus *bus))
|
| 1043 |
{
|
| 1044 |
assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
|
| 1045 |
soundhw[soundhw_count].name = name; |
| 1046 |
soundhw[soundhw_count].descr = descr; |
| 1047 |
soundhw[soundhw_count].isa = 1;
|
| 1048 |
soundhw[soundhw_count].init.init_isa = init_isa; |
| 1049 |
soundhw_count++; |
| 1050 |
} |
| 1051 |
|
| 1052 |
void pci_register_soundhw(const char *name, const char *descr, |
| 1053 |
int (*init_pci)(PCIBus *bus))
|
| 1054 |
{
|
| 1055 |
assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
|
| 1056 |
soundhw[soundhw_count].name = name; |
| 1057 |
soundhw[soundhw_count].descr = descr; |
| 1058 |
soundhw[soundhw_count].isa = 0;
|
| 1059 |
soundhw[soundhw_count].init.init_pci = init_pci; |
| 1060 |
soundhw_count++; |
| 1061 |
} |
| 1062 |
|
| 1063 |
void select_soundhw(const char *optarg) |
| 1064 |
{
|
| 1065 |
struct soundhw *c;
|
| 1066 |
|
| 1067 |
if (is_help_option(optarg)) {
|
| 1068 |
show_valid_cards:
|
| 1069 |
|
| 1070 |
if (soundhw_count) {
|
| 1071 |
printf("Valid sound card names (comma separated):\n");
|
| 1072 |
for (c = soundhw; c->name; ++c) {
|
| 1073 |
printf ("%-11s %s\n", c->name, c->descr);
|
| 1074 |
} |
| 1075 |
printf("\n-soundhw all will enable all of the above\n");
|
| 1076 |
} else {
|
| 1077 |
printf("Machine has no user-selectable audio hardware "
|
| 1078 |
"(it may or may not have always-present audio hardware).\n");
|
| 1079 |
} |
| 1080 |
exit(!is_help_option(optarg)); |
| 1081 |
} |
| 1082 |
else {
|
| 1083 |
size_t l; |
| 1084 |
const char *p; |
| 1085 |
char *e;
|
| 1086 |
int bad_card = 0; |
| 1087 |
|
| 1088 |
if (!strcmp(optarg, "all")) { |
| 1089 |
for (c = soundhw; c->name; ++c) {
|
| 1090 |
c->enabled = 1;
|
| 1091 |
} |
| 1092 |
return;
|
| 1093 |
} |
| 1094 |
|
| 1095 |
p = optarg; |
| 1096 |
while (*p) {
|
| 1097 |
e = strchr(p, ',');
|
| 1098 |
l = !e ? strlen(p) : (size_t) (e - p); |
| 1099 |
|
| 1100 |
for (c = soundhw; c->name; ++c) {
|
| 1101 |
if (!strncmp(c->name, p, l) && !c->name[l]) {
|
| 1102 |
c->enabled = 1;
|
| 1103 |
break;
|
| 1104 |
} |
| 1105 |
} |
| 1106 |
|
| 1107 |
if (!c->name) {
|
| 1108 |
if (l > 80) { |
| 1109 |
fprintf(stderr, |
| 1110 |
"Unknown sound card name (too big to show)\n");
|
| 1111 |
} |
| 1112 |
else {
|
| 1113 |
fprintf(stderr, "Unknown sound card name `%.*s'\n",
|
| 1114 |
(int) l, p);
|
| 1115 |
} |
| 1116 |
bad_card = 1;
|
| 1117 |
} |
| 1118 |
p += l + (e != NULL);
|
| 1119 |
} |
| 1120 |
|
| 1121 |
if (bad_card) {
|
| 1122 |
goto show_valid_cards;
|
| 1123 |
} |
| 1124 |
} |
| 1125 |
} |
| 1126 |
|
| 1127 |
void audio_init(void) |
| 1128 |
{
|
| 1129 |
struct soundhw *c;
|
| 1130 |
ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL); |
| 1131 |
PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL); |
| 1132 |
|
| 1133 |
for (c = soundhw; c->name; ++c) {
|
| 1134 |
if (c->enabled) {
|
| 1135 |
if (c->isa) {
|
| 1136 |
if (!isa_bus) {
|
| 1137 |
fprintf(stderr, "ISA bus not available for %s\n", c->name);
|
| 1138 |
exit(1);
|
| 1139 |
} |
| 1140 |
c->init.init_isa(isa_bus); |
| 1141 |
} else {
|
| 1142 |
if (!pci_bus) {
|
| 1143 |
fprintf(stderr, "PCI bus not available for %s\n", c->name);
|
| 1144 |
exit(1);
|
| 1145 |
} |
| 1146 |
c->init.init_pci(pci_bus); |
| 1147 |
} |
| 1148 |
} |
| 1149 |
} |
| 1150 |
} |
| 1151 |
|
| 1152 |
int qemu_uuid_parse(const char *str, uint8_t *uuid) |
| 1153 |
{
|
| 1154 |
int ret;
|
| 1155 |
|
| 1156 |
if (strlen(str) != 36) { |
| 1157 |
return -1; |
| 1158 |
} |
| 1159 |
|
| 1160 |
ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], |
| 1161 |
&uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], |
| 1162 |
&uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], |
| 1163 |
&uuid[15]);
|
| 1164 |
|
| 1165 |
if (ret != 16) { |
| 1166 |
return -1; |
| 1167 |
} |
| 1168 |
return 0; |
| 1169 |
} |
| 1170 |
|
| 1171 |
void do_acpitable_option(const QemuOpts *opts) |
| 1172 |
{
|
| 1173 |
#ifdef TARGET_I386
|
| 1174 |
Error *err = NULL;
|
| 1175 |
|
| 1176 |
acpi_table_add(opts, &err); |
| 1177 |
if (err) {
|
| 1178 |
error_report("Wrong acpi table provided: %s",
|
| 1179 |
error_get_pretty(err)); |
| 1180 |
error_free(err); |
| 1181 |
exit(1);
|
| 1182 |
} |
| 1183 |
#endif
|
| 1184 |
} |
| 1185 |
|
| 1186 |
void do_smbios_option(QemuOpts *opts)
|
| 1187 |
{
|
| 1188 |
#ifdef TARGET_I386
|
| 1189 |
smbios_entry_add(opts); |
| 1190 |
#endif
|
| 1191 |
} |
| 1192 |
|
| 1193 |
void cpudef_init(void) |
| 1194 |
{
|
| 1195 |
#if defined(cpudef_setup)
|
| 1196 |
cpudef_setup(); /* parse cpu definitions in target config file */
|
| 1197 |
#endif
|
| 1198 |
} |
| 1199 |
|
| 1200 |
int tcg_available(void) |
| 1201 |
{
|
| 1202 |
return 1; |
| 1203 |
} |
| 1204 |
|
| 1205 |
int kvm_available(void) |
| 1206 |
{
|
| 1207 |
#ifdef CONFIG_KVM
|
| 1208 |
return 1; |
| 1209 |
#else
|
| 1210 |
return 0; |
| 1211 |
#endif
|
| 1212 |
} |
| 1213 |
|
| 1214 |
int xen_available(void) |
| 1215 |
{
|
| 1216 |
#ifdef CONFIG_XEN
|
| 1217 |
return 1; |
| 1218 |
#else
|
| 1219 |
return 0; |
| 1220 |
#endif
|
| 1221 |
} |
| 1222 |
|
| 1223 |
|
| 1224 |
TargetInfo *qmp_query_target(Error **errp) |
| 1225 |
{
|
| 1226 |
TargetInfo *info = g_malloc0(sizeof(*info));
|
| 1227 |
|
| 1228 |
info->arch = g_strdup(TARGET_NAME); |
| 1229 |
|
| 1230 |
return info;
|
| 1231 |
} |
| 1232 |
|
| 1233 |
/* Stub function that's gets run on the vcpu when its brought out of the
|
| 1234 |
VM to run inside qemu via async_run_on_cpu()*/
|
| 1235 |
static void mig_sleep_cpu(void *opq) |
| 1236 |
{
|
| 1237 |
qemu_mutex_unlock_iothread(); |
| 1238 |
g_usleep(30*1000); |
| 1239 |
qemu_mutex_lock_iothread(); |
| 1240 |
} |
| 1241 |
|
| 1242 |
/* To reduce the dirty rate explicitly disallow the VCPUs from spending
|
| 1243 |
much time in the VM. The migration thread will try to catchup.
|
| 1244 |
Workload will experience a performance drop.
|
| 1245 |
*/
|
| 1246 |
static void mig_throttle_guest_down(void) |
| 1247 |
{
|
| 1248 |
CPUState *cpu; |
| 1249 |
|
| 1250 |
qemu_mutex_lock_iothread(); |
| 1251 |
CPU_FOREACH(cpu) {
|
| 1252 |
async_run_on_cpu(cpu, mig_sleep_cpu, NULL);
|
| 1253 |
} |
| 1254 |
qemu_mutex_unlock_iothread(); |
| 1255 |
} |
| 1256 |
|
| 1257 |
static void check_guest_throttling(void) |
| 1258 |
{
|
| 1259 |
static int64_t t0;
|
| 1260 |
int64_t t1; |
| 1261 |
|
| 1262 |
if (!mig_throttle_on) {
|
| 1263 |
return;
|
| 1264 |
} |
| 1265 |
|
| 1266 |
if (!t0) {
|
| 1267 |
t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
| 1268 |
return;
|
| 1269 |
} |
| 1270 |
|
| 1271 |
t1 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
| 1272 |
|
| 1273 |
/* If it has been more than 40 ms since the last time the guest
|
| 1274 |
* was throttled then do it again.
|
| 1275 |
*/
|
| 1276 |
if (40 < (t1-t0)/1000000) { |
| 1277 |
mig_throttle_guest_down(); |
| 1278 |
t0 = t1; |
| 1279 |
} |
| 1280 |
} |