mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
28,322 Commits 50 Branches 394 Tags 404 MiB
C 82.6%
C++ 6.5%
Python 3.4%
Dylan 2.9%
Shell 1.6%
Other 2.8%
04920fc0fa
Go to file
Michael S. Tsirkin 04920fc0fa loader: store FW CFG ROM files in RAM 
ROM files that are put in FW CFG are copied to guest ram, by BIOS, but
they are not backed by RAM so they don't get migrated.

Each time we change two bytes in such a ROM this breaks cross-version
migration: since we can migrate after BIOS has read the first byte but
before it has read the second one, getting an inconsistent state.

Future-proof this by creating, for each such ROM,
an MR serving as the backing store.
This MR is never mapped into guest memory, but it's registered
as RAM so it's migrated with the guest.

Naturally, this only helps for -M 1.7 and up, older machine types
will still have the cross-version migration bug.
Luckily the race window for the problem to trigger is very small,
which is also likely why we didn't notice the cross-version
migration bug in testing yet.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2013-08-21 00:18:39 +03:00
audio audio: Replace static functions in header file by macros, remove GCC_ATTR 2013-06-21 22:52:50 +04:00
backends rng-random: use error_setg_file_open() 2013-06-17 11:01:14 -04:00
block aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
bsd-user gdbstub: Change gdb_handlesig() argument to CPUState 2013-07-23 02:41:33 +02:00
default-configs default-configs: Fix A9MP and A15MP config names 2013-08-20 14:54:32 +01:00
disas tcg-arm: Implement division instructions 2013-04-27 02:16:44 +02:00
docs misc: Fix new typos in comments and strings 2013-07-27 11:22:54 +04:00
dtc@bc895d6d09 dtc: add submodule 2013-04-18 13:50:53 +02:00
fpu softfloat: Fix shift128Right for shift counts 64..127 2013-06-10 11:36:12 -05:00
fsdev fsdev: Fix potential memory leak 2013-07-09 13:38:56 -05:00
gdb-xml
hw loader: store FW CFG ROM files in RAM 2013-08-21 00:18:39 +03:00
include loader: store FW CFG ROM files in RAM 2013-08-21 00:18:39 +03:00
libcacard libcacard: Fix cppcheck warning and remove unneeded code 2013-06-21 22:52:50 +04:00
linux-headers linux-headers: Update to v3.10-rc5 2013-06-12 13:19:10 +04:00
linux-user linux-user: Return success from m68k set_thread_area syscall 2013-07-29 19:56:52 -05:00
net misc: Use g_assert_not_reached for code which is expected to be unreachable 2013-07-27 11:22:54 +04:00
pc-bios Update OpenBIOS images 2013-07-30 23:11:07 +01:00
pixman@97336fad32
po po: Update all *.po files 2013-08-07 12:48:00 -05:00
qapi qapi: make visit_type_size fallback to type_int 2013-07-29 19:33:33 -05:00
qga qga: escape cmdline args when registering win32 service (CVE-2013-2231) 2013-07-25 14:49:04 -05:00
QMP net: add support of mac-programming over macvtap in QEMU side 2013-07-15 21:23:08 +03:00
qobject Implement qdict_flatten() 2013-07-26 22:01:31 +02:00
qom qom: Introduce instance_post_init hook 2013-08-16 18:44:33 +02:00
roms Update OpenBIOS images 2013-07-30 23:11:07 +01:00
scripts qapi.py: Permit comments starting anywhere on the line 2013-07-29 10:37:11 -05:00
slirp slirp: remove mbuf(m_hdr,m_dat) indirection 2013-07-19 12:52:03 +04:00
stubs dump: rebase from host-private RAMBlock offsets to guest-physical addresses 2013-08-08 11:01:46 -04:00
sysconfigs/target
target-alpha target-alpha: Consider the superpage when threading and ending TBs 2013-08-16 11:17:23 -07:00
target-arm target-arm: Implement the generic timer 2013-08-20 14:54:31 +01:00
target-cris cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-i386 target-i386: Move hyperv_* static globals to X86CPU 2013-08-16 18:44:33 +02:00
target-lm32 lm32_juart: Relocate and tidy header 2013-07-29 21:06:27 +02:00
target-m68k cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-microblaze cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-mips target-mips: fix decoding of microMIPS POOL32Axf instructions 2013-08-06 13:09:14 +02:00
target-moxie cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-openrisc cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-ppc target-ppc: Add POWER5+ v2.1 CPU model 2013-08-07 12:47:44 -05:00
target-s390x dump: rebase from host-private RAMBlock offsets to guest-physical addresses 2013-08-08 11:01:46 -04:00
target-sh4 cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-sparc cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-unicore32 cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" 2013-07-29 15:29:15 +02:00
target-xtensa xtensa queue 2013-07-29 2013-08-05 08:06:25 -05:00
tcg tcg/mips: fix invalid op definition errors 2013-08-08 23:06:02 +02:00
tests Merge remote-tracking branch 'stefanha/block-next' into staging 2013-08-20 09:52:18 -05:00
trace trace: Add ftrace tracing backend 2013-05-03 13:58:09 +02:00
ui spice: fix display initialization 2013-07-30 10:25:47 +02:00
util qemu-option: Guard against qemu_opts_set_defaults() misuse 2013-08-12 09:15:37 -05:00
.exrc
.gitignore gitignore: unignore *.patch 2013-06-11 23:45:43 +04:00
.gitmodules pc-bios: Update palcode-clipper 2013-07-18 08:17:42 -07:00
.mailmap Change email address 2013-08-19 08:49:37 -05:00
aio-posix.c aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
aio-win32.c aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
arch_init.c arch_init: align MR size to target page size 2013-08-21 00:18:39 +03:00
async.c aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
balloon.c
block-migration.c block-migration: efficiently encode zero blocks 2013-07-19 12:29:21 +08:00
block.c block: stop relying on io_flush() in bdrv_drain_all() 2013-08-19 15:45:34 +02:00
blockdev-nbd.c hw: move headers to include/ 2013-04-08 18:13:10 +02:00
blockdev.c block: Dont ignore previously set bdrv_flags 2013-08-14 08:34:00 -05:00
blockjob.c
bt-host.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
bt-vhci.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
Changelog
CODING_STYLE
configure xtensa queue 2013-07-29 2013-08-05 08:06:25 -05:00
COPYING
COPYING.LIB
coroutine-gthread.c
coroutine-sigaltstack.c Merge remote-tracking branch 'kwolf/for-anthony' into staging 2013-02-26 07:44:39 -06:00
coroutine-ucontext.c Fix warnings suppressors to honor --disable-werror 2013-04-17 10:28:04 -05:00
coroutine-win32.c
cpu-exec.c cpu: Move singlestep_enabled field from CPU_COMMON to CPUState 2013-07-23 02:41:32 +02:00
cpus.c cpus: Use cpu_is_stopped() efficiently 2013-08-16 18:44:33 +02:00
cputlb.c cpu: Make first_cpu and next_cpu CPUState 2013-07-09 21:32:54 +02:00
device_tree.c device_tree: Add qemu_devtree_setprop_sized_cells() utility functions 2013-07-19 12:58:46 +01:00
device-hotplug.c hw: move device-hotplug.o to toplevel, compile it once 2013-03-01 13:57:13 +01:00
disas.c exec: Change cpu_memory_rw_debug() argument to CPUState 2013-07-23 02:41:33 +02:00
dma-helpers.c dma: keep a device alive while it has SGLists 2013-07-04 17:42:30 +02:00
dump.c dump: rebase from host-private RAMBlock offsets to guest-physical addresses 2013-08-08 11:01:46 -04:00
exec.c cpu: Fix VMSTATE_CPU() semantics 2013-07-31 21:03:59 +02:00
gdbstub.c gdbstub: Fix gdb_register_coprocessor() register counting 2013-08-16 18:44:33 +02:00
HACKING HACKING: Document vaddr type usage 2013-07-23 02:41:31 +02:00
hmp-commands.hx block: add drive_backup HMP command 2013-07-15 09:49:00 +02:00
hmp.c rdma: account for the time spent in MIG_STATE_SETUP through QMP 2013-07-23 13:06:37 +02:00
hmp.h block: add drive_backup HMP command 2013-07-15 09:49:00 +02:00
iohandler.c iohandler: switch to GPollFD 2013-02-21 16:17:31 -06:00
ioport.c Revert "ioport: remove LITTLE_ENDIAN mark for portio" 2013-07-25 08:12:27 -05:00
kvm-all.c kvm: Change prototype of kvm_update_guest_debug() 2013-07-26 23:05:31 +02:00
kvm-stub.c kvm: Change prototype of kvm_update_guest_debug() 2013-07-26 23:05:31 +02:00
LICENSE LICENSE: clarify 2013-08-12 09:15:12 -05:00
main-loop.c aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
MAINTAINERS Change email address 2013-08-19 08:49:37 -05:00
Makefile w32: Add missing version.o to all executables (fix regression) 2013-08-12 09:19:05 -05:00
Makefile.objs w32: Add missing version.o to all executables (fix regression) 2013-08-12 09:19:05 -05:00
Makefile.target build: do not use TARGET_ARCH 2013-06-14 15:33:10 +01:00
memory_mapping.c dump: rebase from host-private RAMBlock offsets to guest-physical addresses 2013-08-08 11:01:46 -04:00
memory.c memory.c: drop kvm.h dependency 2013-08-02 18:05:16 +04:00
migration-exec.c migration: eliminate s->migration_file 2013-03-11 13:32:03 +01:00
migration-fd.c migration: eliminate s->migration_file 2013-03-11 13:32:03 +01:00
migration-rdma.c rdma: IPv6 over Ethernet (RoCE) is broken in linux - workaround 2013-08-12 09:31:16 -05:00
migration-tcp.c migration: eliminate s->migration_file 2013-03-11 13:32:03 +01:00
migration-unix.c migration: eliminate s->migration_file 2013-03-11 13:32:03 +01:00
migration.c migration: don't use uninitialized variables 2013-08-01 09:40:46 -04:00
monitor.c exec: Change cpu_memory_rw_debug() argument to CPUState 2013-07-23 02:41:33 +02:00
nbd.c nbd: support large NBD requests 2013-05-03 13:05:49 +02:00
os-posix.c Add option to mlock qemu and guest memory 2013-04-22 08:52:23 -05:00
os-win32.c qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32 2013-04-12 18:27:16 +02:00
page_cache.c remove some double-includes 2013-05-18 16:35:12 +04:00
qapi-schema.json qapi: Rename ChardevBackend member "memory" to "ringbuf" 2013-07-29 10:37:12 -05:00
qdev-monitor.c qemu-help: Sort devices by logical functionality 2013-07-29 10:37:09 -05:00
qdict-test-data.txt
qemu-bridge-helper.c qemu-bridge-helper: force usage of a very high MAC address for the bridge 2013-03-28 12:58:52 -05:00
qemu-char.c qemu-char: fix infinite recursion connecting to monitor pty 2013-08-13 13:24:50 -05:00
qemu-coroutine-io.c rdma: export yield_until_fd_readable() 2013-06-27 02:38:36 +02:00
qemu-coroutine-lock.c block: Repair the throttling code. 2013-07-29 17:07:37 +02:00
qemu-coroutine-sleep.c
qemu-coroutine.c coroutine: stop using AioContext in CoQueue 2013-05-24 16:17:56 +02:00
qemu-doc.texi doc: we use seabios, not bochs bios 2013-06-28 22:10:34 +04:00
qemu-img-cmds.hx qemu-img: Add compare subcommand 2013-02-22 21:21:10 +01:00
qemu-img.c ignore SIGPIPE in qemu-img and qemu-io 2013-08-06 10:41:56 +02:00
qemu-img.texi qemu-img: Add compare subcommand 2013-02-22 21:21:10 +01:00
qemu-io-cmds.c qemu-io: Interface cleanup 2013-06-06 11:27:05 +02:00
qemu-io.c ignore SIGPIPE in qemu-img and qemu-io 2013-08-06 10:41:56 +02:00
qemu-log.c qemu-log: default to stderr for logging output 2013-02-26 13:31:47 -06:00
qemu-nbd.c Add -f FMT / --format FMT arg to qemu-nbd 2013-04-15 14:29:20 -05:00
qemu-nbd.texi Add -f FMT / --format FMT arg to qemu-nbd 2013-04-15 14:29:20 -05:00
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx Revert "chardev: Make the name of memory device consistent" 2013-07-29 10:37:11 -05:00
qemu-seccomp.c seccomp: add arch_prctl() to the syscall whitelist 2013-07-29 19:56:52 -05:00
qemu-tech.texi
qemu-timer.c qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32 2013-04-12 18:27:16 +02:00
qemu.nsi w32, w64: Add build rule for installer 2013-07-29 11:43:37 +02:00
qemu.sasl Fix command example in qemu.sasl 2013-07-19 12:52:03 +04:00
qmp-commands.hx rdma: remaining documentation fixes 2013-08-12 09:31:16 -05:00
qmp.c QMP: Add cpu-add command 2013-05-01 13:06:07 +02:00
qtest.c qtest: Don't reset on qtest chardev connect 2013-07-18 13:27:46 -05:00
readline.c readline: Handle xterm escape sequences for Home/End keys 2013-05-14 08:53:22 -05:00
README
rules.mak win32: fix compilation again 2013-05-03 12:04:40 -05:00
savevm.c rdma: bugfix: ram_control_save_page() 2013-07-23 11:11:59 +02:00
spice-qemu-char.c qemu-char: don't issue CHR_EVENT_OPEN in a BH 2013-06-10 11:38:37 -05:00
tcg-runtime.c tcg: Implement multiword multiply helpers 2013-02-23 17:25:28 +00:00
tci.c tci: Make tcg temporaries local to tcg_qemu_tb_exec 2013-04-11 19:58:21 +02:00
thread-pool.c aio: drop io_flush argument 2013-08-19 15:52:19 +02:00
thunk.c
tpm.c tpm.c: Don't try to put -1 in a variable of type TpmModel 2013-07-29 10:37:10 -05:00
trace-events memory: add tracepoints for MMIO reads/writes 2013-07-29 10:37:10 -05:00
translate-all.c linux-user: Unlock mmap_lock when resuming guest from page_unprotect 2013-07-23 17:28:28 +03:00
translate-all.h cputlb: Pass CPUState to cpu_unlink_tb() 2013-02-16 14:51:00 +01:00
user-exec.c linux-user: fix segmentation fault passing with h2g(x) != x 2013-07-23 17:28:28 +03:00
VERSION Open up 1.7 development branch 2013-08-15 15:41:13 -05:00
version.rc
vl.c spice: fix display initialization 2013-07-30 10:25:47 +02:00
xbzrle.c
xen-all.c memory: add ref/unref calls 2013-07-04 17:42:45 +02:00
xen-mapcache.c hw: move headers to include/ 2013-04-08 18:13:10 +02:00
xen-stub.c Allow use of pc machine type (accel=xen) for Xen HVM domains. 2013-06-25 12:00:48 +00:00

README 

Read the documentation in qemu-doc.html or on http://wiki.qemu.org

- QEMU team