blk/bdrv_drain_all() only takes effect for a single instant and then
resumes block jobs, guest devices, and other external clients like the
NBD server. This can be handy when performing a synchronous drain
before terminating the program, for example.
Monitor commands usually need to quiesce I/O across an entire code
region so blk/bdrv_drain_all() is not suitable. They must use
bdrv_drain_all_begin/end() to mark the region. This prevents new I/O
requests from slipping in or worse - block jobs completing and modifying
the graph.
I audited other blk/bdrv_drain_all() callers but did not find anything
that needs a similar fix. This patch fixes the savevm/loadvm commands.
Although I haven't encountered a read world issue this makes the code
safer.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
AioContext was designed to allow nested acquire/release calls. It uses
a recursive mutex so callers don't need to worry about nesting...or so
we thought.
BDRV_POLL_WHILE() is used to wait for block I/O requests. It releases
the AioContext temporarily around aio_poll(). This gives IOThreads a
chance to acquire the AioContext to process I/O completions.
It turns out that recursive locking and BDRV_POLL_WHILE() don't mix.
BDRV_POLL_WHILE() only releases the AioContext once, so the IOThread
will not be able to acquire the AioContext if it was acquired
multiple times.
Instead of trying to release AioContext n times in BDRV_POLL_WHILE(),
this patch simply avoids nested locking in save_vmstate(). It's the
simplest fix and we should step back to consider the big picture with
all the recent changes to block layer threading.
This patch is the final fix to solve 'savevm' hanging with -object
iothread.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Calling aio_poll() directly may have been fine previously, but this is
the future, man! The difference between an aio_poll() loop and
BDRV_POLL_WHILE() is that BDRV_POLL_WHILE() releases the AioContext
around aio_poll().
This allows the IOThread to run fd handlers or BHs to complete the
request. Failure to release the AioContext causes deadlocks.
Using BDRV_POLL_WHILE() partially fixes a 'savevm' hang with -object
iothread.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Call bdrv_inc/dec_in_flight() for vmstate reads/writes. This seems
unnecessary at first glance because vmstate reads/writes are done
synchronously while the guest is stopped. But we need the bdrv_wakeup()
in bdrv_dec_in_flight() so the main loop sees request completion.
Besides, it's cleaner to count vmstate reads/writes like ordinary
read/write requests.
The bdrv_wakeup() partially fixes a 'savevm' hang with -object iothread.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When qemu is exited, all running jobs should be cancelled successfully.
This adds a test for this for all types of block jobs that currently
exist in qemu.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
After _cleanup_qemu(), test cases should be able to start the next qemu
process and call _cleanup_qemu() for that one as well. For this to work
cleanly, we need to improve the cleanup so that the second invocation
doesn't try to kill the qemu instances from the first invocation a
second time (which would result in error messages).
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
commit_complete() can't assume that after its block_job_completed() the
job is actually immediately freed; someone else may still be holding
references. In this case, the op blockers on the intermediate nodes make
the graph reconfiguration in the completion code fail.
Call block_job_remove_all_bdrv() manually so that we know for sure that
any blockers on intermediate nodes are given up.
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
We want the wide character functions from the ncurses header.
Unfortunately it doesn't provide them by default, but only
if either:
* NCURSES_WIDECHAR is defined (for ncurses 20111030 and up)
* _XOPEN_SOURCE/_XOPEN_SOURCE_EXTENDED are suitably defined
So far we have been implicitly relying on the latter, because
for GNU libc when we define _GNU_SOURCE this causes libc
to define the _XOPEN_SOURCE macros for us. Unfortunately
this doesn't work on all libcs, because some (like OSX and
musl libc) do not define _XOPEN_SOURCE when _GNU_SOURCE
is defined.
We can't fix this by defining _XOPEN_SOURCE ourselves, because
that also means "and don't provide any functions that aren't in
that standard", and not all libcs provide any way to override
that to also get the non-standard functions. In particular
FreeBSD has no such mechanism, and OSX's _DARWIN_C_SOURCE
doesn't reenable everything (for instance getpagesize()
is still not prototyped if _DARWIN_C_SOURCE and _XOPEN_SOURCE
are both defined).
So we have to define NCURSES_WIDECHAR. (This will only work
if your ncurses is at least 20111030, as older versions
don't honour this macro.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 1496414138-7622-1-git-send-email-peter.maydell@linaro.org
Let's keep it very simple for now and flush the complete tlb,
we currently can't find the right entries in our tlb, we would have
to store the used tables for each element.
As we now fully implement the DAT-enhancement facility, we can allow to
enable it for the qemu CPU model.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170622094151.28633-4-david@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
If only the page index is set, most likely we don't have a valid
virtual address. Let's do a full tlb flush for that case.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170622094151.28633-3-david@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Let's allow to enable it for the qemu cpu model and correctly emulate
it.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170622094151.28633-2-david@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Most of the PSW bits that were being copied into TB->flags
are not relevant to translation. Removing those that are
unnecessary reduces the amount of translation required.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Missed the proper alignment in TRTO/TRTT, and ignoring the M3
field for all TRXX insns without ETF2-ENH.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This facility bit includes execution-hint, load-and-trap,
miscellaneous-instruction-extensions and processor-assist.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This facility bit includes load-on-condition-2 and
load-and-zero-rightmost-byte.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This facility bit includes DFP-rounding, FPR-GR-transfer,
FPS-sign-handling, and IEEE-exception-simulation. We do
support all of these.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This adds support for the MOVE WITH OPTIONAL SPECIFICATIONS (MVCOS)
instruction. Allow to enable it for the qemu cpu model using
qemu-system-s390x ... -cpu qemu,mvcos=on ...
This allows to boot linux kernel that uses it for uacccess.
We are missing (as for most other part) low address protection checks,
PSW key / storage key checks and support for AR-mode.
We fake an ADDRESSING exception when called from problem state (which
seems to rely on PSW key checks to be in place) and if AR-mode is used.
user mode will always see a PRIVILEDGED exception.
This patch is based on an original patch by Miroslav Benes (thanks!).
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170614133819.18480-3-david@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Such shifts are usually used to easily extract the PSW KEY from the PSW
mask, so let's avoid the confusing offset of 4.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170614133819.18480-2-david@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
The FAC_ names were placeholders prior to the introduction
of the current facility modeling.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
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Merge remote-tracking branch 'remotes/otubo/tags/pull-seccomp-20170622' into staging
pull-seccomp-20170622
# gpg: Signature made Thu 22 Jun 2017 09:01:01 BST
# gpg: using RSA key 0xDF32E7C0F0FFF9A2
# gpg: Good signature from "Eduardo Otubo (Senior Software Engineer) <otubo@redhat.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D67E 1B50 9374 86B4 0723 DBAB DF32 E7C0 F0FF F9A2
* remotes/otubo/tags/pull-seccomp-20170622:
MAINTAINERS: seccomp: change email contact for Eduardo Otubo
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Programs running inside of QEMU can sometimes use more CPU time than is really
needed. To solve this problem, we just need to throttle the virtual CPU. This
feature will stop laptops from burning up.
This patch adds a menu called Speed that has menu items from 100% to 1% that
represent the speed options. 100% is full speed and 1% is slowest.
Signed-off-by: John Arbuckle <programmingkidx@gmail.com>
Message-id: D6FAAABF-064D-49C0-B572-C73679F34052@gmail.com
[PMM: Moved "mark 100% menu item as checked initially" code to
after menu item is allocated, not before it]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Set access width of all AppleSMC i/o regions to 1 byte, since they
all represent 8-bit-wide ports.
Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Message-id: 1497639316-22202-4-git-send-email-gsomlo@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
As of release 10.12.4, OS X (Sierra) refuses to boot unless the
AppleSMC supports an additional I/O port, expected to provide an
error status code.
Update the [cmd|data]_write() and data_read() methods to implement
the required state machine, and add I/O region & methods to handle
access to the error port.
Originally proposed by Eric Shelton <eshelton@pobox.com> based in
part on FakeSMC (git://git.assembla.com/fakesmc.git).
Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1497639316-22202-3-git-send-email-gsomlo@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
When the guest resets the keyboard also clear the queue. It is highly
unlikely that the guest is still interested in the events stuck in the
queue, and it avoids confusing the guest in case the queue is full and
the ACK can't be queued up.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1372583
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170606112105.13331-4-kraxel@redhat.com
Factor out ps2 queue reset to a separate function.
No functional change.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170606112105.13331-3-kraxel@redhat.com
Cleanup: Create and use a typedef for PS2State and stop passing void
pointers. No functional change.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170606112105.13331-2-kraxel@redhat.com
There is a loop a few lines up counting consoles and setting
sdl2_num_outputs accordingly, so con ptr can't be NULL there.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170621122234.12751-1-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
When resetting the keyboard, we need to reset not just the pending keystrokes,
but also any pending modifiers. Otherwise there's a race when we're getting
reset while running an escape sequence (modifier 0x100).
Cc: qemu-stable@nongnu.org
Signed-off-by: Alexander Graf <agraf@suse.de>
Message-id: 1498117295-162030-1-git-send-email-agraf@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Delays in the input layer are special cased input events. Every input
event is accounted for in a global intput queue count. The special cased
delays however did not get removed from the queue, leading to queue overruns
and thus silent key drops after typing quite a few characters.
Signed-off-by: Alexander Graf <agraf@suse.de>
Message-id: 1498117318-162102-1-git-send-email-agraf@suse.de
Fixes: be1a7176 ("input: add support for kbd delays")
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Drop commented debug logging, add trace points instead.
Also cleanup parser code a bit, the key name is copied into a new
variable instead of patching the input line, that way we can log
the unmodified line.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170606134736.26080-1-kraxel@redhat.com
We add the following cross-compile targets:
- mipsel-softmmu,mipsel-linux-user,mips64el-linux-user
- armeb-linux-user
While I was rolling I discovered we could also back out a bunch of the
emdebian hacks as the newly released stretch handles cross compilers
as first class citizens. Unfortunately this also meant I had to drop
the powerpc support as that is no longer in Debian stable.
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-ci-updates-210617-2' into staging
This is mostly Philippe's updates
We add the following cross-compile targets:
- mipsel-softmmu,mipsel-linux-user,mips64el-linux-user
- armeb-linux-user
While I was rolling I discovered we could also back out a bunch of the
emdebian hacks as the newly released stretch handles cross compilers
as first class citizens. Unfortunately this also meant I had to drop
the powerpc support as that is no longer in Debian stable.
# gpg: Signature made Wed 21 Jun 2017 15:09:50 BST
# gpg: using RSA key 0xFBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>"
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-ci-updates-210617-2: (21 commits)
MAINTAINERS: self-appoint me as reviewer in build/test automation
MAINTAINERS: add Shippable automation platform URL
shippable: add mipsel target
shippable: add armeb-linux-user target
shippable: be verbose while building docker images
shippable: do not initialize submodules automatically
shippable: build using all available cpus
shippable: use C locale to simplify console output
docker: add mipsel build target
docker: add extra libs to s390x target to extend codebase coverage
docker: add extra libs to arm64 target to extend codebase coverage
docker: add extra libs to armhf target to extend codebase coverage
docker: use eatmydata in debian arm64 image
docker: use eatmydata in debian armhf image
docker: use eatmydata, install common build packages in base image
docker: use better regex to generate deb-src entries
docker: install ca-certificates package in base image
docker: rebuild image if 'extra files' checksum does not match
docker: add --include-files argument to 'build' command
docker: let _copy_with_mkdir() sub_path argument be optional
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2017-06-09-v2' into staging
QAPI patches for 2017-06-09
# gpg: Signature made Tue 20 Jun 2017 13:31:39 BST
# gpg: using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-qapi-2017-06-09-v2: (41 commits)
tests/qdict: check more get_try_int() cases
console: use get_uint() for "head" property
i386/cpu: use get_uint() for "min-level"/"min-xlevel" properties
numa: use get_uint() for "size" property
pnv-core: use get_uint() for "core-pir" property
pvpanic: use get_uint() for "ioport" property
auxbus: use get_uint() for "addr" property
arm: use get_uint() for "mp-affinity" property
xen: use get_uint() for "max-ram-below-4g" property
pc: use get_uint() for "hpet-intcap" property
pc: use get_uint() for "apic-id" property
pc: use get_uint() for "iobase" property
acpi: use get_uint() for "pci-hole*" properties
acpi: use get_uint() for various acpi properties
acpi: use get_uint() for "acpi-pcihp-io*" properties
platform-bus: use get_uint() for "addr" property
bcm2835_fb: use {get, set}_uint() for "vcram-size" and "vcram-base"
aspeed: use {set, get}_uint() for "ram-size" property
pcihp: use get_uint() for "bsel" property
pc-dimm: make "size" property uint64
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Coldfire uses float64, but 680x0 use floatx80.
This patch introduces the use of floatx80 internally
and enables 680x0 80bits FPU.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170620205121.26515-4-laurent@vivier.eu>
on reset, set FP registers to NaN and control registers to 0
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170620205121.26515-3-laurent@vivier.eu>
Move code of fmove to/from control register to a function
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170620205121.26515-2-laurent@vivier.eu>
