Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Various header files rely on qemu-char.h including qemu-config.h or
main-loop.h, but they really do not need qemu-char.h at all (particularly
interesting is the case of the block layer!).  Clean this up, and also
add missing inclusions of qemu-char.h itself.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

update all users so we can remove the makefile hack.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

madvise(DONTNEED) will throw away the contents of the whole page at the
given address, even if the given length is less than the page size.  One
can argue about whether that's the correct behaviour, but that's what it's
done for a long time in Linux at least.

That means that the madvise() in ram_load(), on a setup where
TARGET_PAGE_SIZE is smaller than the host page size, can throw away data
in guest pages adjacent to the one it's actually processing right now,
leading to guest memory corruption on an incoming migration.

This patch therefore, disables the madvise() if the host page size is
larger than TARGET_PAGE_SIZE.  This means we don't get the benefits of that
madvise() in this case, but a more complete fix is more difficult to
accomplish.  This at least fixes the guest memory corruption.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reported-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

The code for migrating (or savevm-ing) memory pages starts off by creating
a dirty bitmap and filling it with 1s.  Except, actually, because bit
addresses are 0-based it fills every bit except bit 0 with 1s and puts an
extra 1 beyond the end of the bitmap, potentially corrupting unrelated
memory.  Oops.  This patch fixes it.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

It indicates how many pages were dirtied during the last second.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

This patch creates a migration bitmap, which is periodically kept in
sync with the qemu bitmap. A separate copy of the dirty bitmap for the
migration limits the amount of concurrent access to the qemu bitmap
from iothread and migration thread (which requires taking the big
lock).

We use the qemu bitmap type.  We have to "undo" the dirty_pages
counting optimization on the general dirty bitmap and do the counting
optimization with the migration local bitmap.
Signed-off-by: NUmesh Deshpande <udeshpan@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>

Helper that we use each time that we need to syncronize the migration
bitmap with the other dirty bitmaps.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>

It just test if the dirty bit is set, and clears it.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>

It just marks a region of memory as dirty.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>

This file is not needed anymore, as QEMU won't ship any config-based
cpudefs out of the box, relying only on the builtin CPU models.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

For architectures which don't set HAS_AUDIO_CHOICE, improve the
'-soundhw help' message so that it doesn't simply print an empty
list, implying no sound support at all.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: Nmalc <av1474@comtv.ru>

'%' symbols were missing in front of PRIu64 macros in DPRINTF() messages in
arch_init.c, this caused compilation warnings when compiled with DEBUG_ARCH_INIT defined.
Signed-off-by: NIgor Mitsyanko <i.mitsyanko@samsung.com>
Signed-off-by: NStefan Hajnoczi <stefanha@gmail.com>

Add a 'query-target' QAPI command to allow management applications
to determine what target architecture a QEMU binary is emulating
without having to parse the binary name or -help output

  $ qmp-shell -p /tmp/qemu
  (QEMU) query-target
  {   u'return': {   u'arch': u'x86_64' }}
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

This patch adds unicore32-softmmu build support, include configure,
makefile, arch_init, and all missing functions needed by softmmu.
Although all missing functions are empty, unicore32-softmmu could
be build successfully.
By 20120804: change QEMU_ARCH_UNICORE32 to 0x4000
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Signed-off-by: NBenoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: NPetter Svard <petters@cs.umu.se>
Signed-off-by: NAidan Shribman <aidan.shribman@sap.com>
Signed-off-by: NOrit Wasserman <owasserm@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Signed-off-by: NBenoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: NPetter Svard <petters@cs.umu.se>
Signed-off-by: NAidan Shribman <aidan.shribman@sap.com>
Signed-off-by: NOrit Wasserman <owasserm@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Change XBZRLE cache size in bytes (the size should be a power of 2, it will be
rounded down to the nearest power of 2).
If XBZRLE cache size is too small there will be many cache miss.

New query-migrate-cache-size QMP command and 'info migrate_cache_size' HMP
command to query cache value.
Signed-off-by: NBenoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: NPetter Svard <petters@cs.umu.se>
Signed-off-by: NAidan Shribman <aidan.shribman@sap.com>
Signed-off-by: NOrit Wasserman <owasserm@redhat.com>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

In the outgoing migration check to see if the page is cached and
changed, then send compressed page by using save_xbrle_page function.
In the incoming migration check to see if RAM_SAVE_FLAG_XBZRLE is set
and decompress the page (by using load_xbrle function).
Signed-off-by: NBenoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: NPetter Svard <petters@cs.umu.se>
Signed-off-by: NAidan Shribman <aidan.shribman@sap.com>
Signed-off-by: NOrit Wasserman <owasserm@redhat.com>
Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

For command line options which permit '?' meaning 'please list the
permitted values', add support for 'help' as a synonym, by abstracting
the check out into a helper function.

This change means that in some cases where we were being lazy in
our string parsing, "?junk" will now be rejected as an invalid option
rather than being (undocumentedly) treated the same way as "?".

Update the documentation to use 'help' rather than '?', since '?'
is a shell metacharacter and thus prone to fail confusingly if there
is a single character filename in the current working directory and
the '?' has not been escaped. It's therefore better to steer users
towards 'help', though '?' is retained for backwards compatibility.

We do not, however, update the output of the system emulator's -help
(or any documentation autogenerated from the qemu-options.hx which
is the source of the -help text) because libvirt parses our -help
output and will break. At a later date when QEMU provides a better
interface so libvirt can avoid having to do this, we can update the
-help text too.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Add OpenRISC target stubs, QOM cpu and basic machine.
Signed-off-by: NJia Liu <proljc@gmail.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

It will return 0 if the page is unmodifed.
Signed-off-by: NOrit Wasserman <owasserm@redhat.com>

1st: we were synchonizing the dirty bitmap before calling
      memory_global_dirty_log_start().

2nd: We are marking all pages as dirty anywhere, no reason to go
     through all the bitmap to "mark" dirty same pages twice.

So, call removed.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

We only need to synchronize the bitmap when the number of dirty pages is low.
Not every time that we call the function.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

We were doing the same loop that stage2, and a new one for stage3.  We
only need the one for stage3.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

We should send pages on interate phase, not in setup one.  This was a
"bug".  Just removing the loop does what we want.  Tested that it
works with current ram_load().
Signed-off-by: NJuan Quintela <quintela@redhat.com>

We split it into 2 functions, foo_live_iterate, and foo_live_complete.
At this point, we only remove the bits that are for the other stage,
functionally this is equivalent to previous code.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

This patch splits stage 1 to its own function for both save_live
users, ram and block.  It is just a copy of the function, removing the
parts of the other stages.  Optimizations would came later.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Intead of abusing stage with value -1.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Notice that the live migration users never unregister, so no problem
about freeing the ops structure.
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Calculate the number of dirty pages takes a lot on hosts with lots
of memory.  Just maintain how many pages are dirty.
Signed-off-by: NJuan Quintela <quintela@redhat.com>