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* qcow2: Deprecate use of qemu-img amend to change backing fileEric Blake2020-07-142-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The use of 'qemu-img amend' to change qcow2 backing files is not tested very well. In particular, our implementation has a bug where if a new backing file is provided without a format, then the prior format is blindly reused, even if this results in data corruption, but this is not caught by iotests. There are also situations where amending other options needs access to the original backing file (for example, on a downgrade to a v2 image, knowing whether a v3 zero cluster must be allocated or may be left unallocated depends on knowing whether the backing file already reads as zero), but the command line does not have a nice way to tell us both the backing file to use for opening the image as well as the backing file to install after the operation is complete. Even if we do allow changing the backing file, it is redundant with the existing ability to change backing files via 'qemu-img rebase -u'. It is time to deprecate this support (leaving the existing behavior intact, even if it is buggy), and at a point in the future, require the use of only 'qemu-img rebase' for adjusting backing chain relations, saving 'qemu-img amend' for changes unrelated to the backing chain. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-8-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* block: Error if backing file fails during creation without -uEric Blake2020-07-142-9/+6Star
| | | | | | | | | | | | | | | | | | | | | | | | Back in commit 6e6e55f5 (Jul 2017, v2.10), we tweaked the code to warn if the backing file could not be opened but the user gave a size, unless the user also passes the -u option to bypass the open of the backing file. As one common reason for failure to open the backing file is when there is mismatch in the requested backing format in relation to what the backing file actually contains, we actually want to open the backing file and ensure that it has the right format in as many cases as possible. iotest 301 for qcow demonstrates how detecting explicit format mismatch is useful to prevent the creation of an image that would probe differently than the user requested. Now is the time to finally turn the warning an error, as promised. Note that the original warning was added prior to our documentation of an official deprecation policy (eb22aeca, also Jul 2017), and because the warning didn't mention the word "deprecated", we never actually remembered to document it as such. But the warning has been around long enough that I don't see prolonging it another two releases. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-7-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qcow: Tolerate backing_fmt=Eric Blake2020-07-143-0/+149
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | qcow has no space in the metadata to store a backing format, and there are existing qcow images backed both by raw or by other formats (usually qcow) images, reliant on probing to tell the difference. On the bright side, because we probe every time, raw files are marked as probed and we thus forbid a commit action into the backing file where guest-controlled contents could change the result of the probe next time around (the iotest added here proves that). Still, allowing the user to specify the backing format during creation, even if we can't record it, is a good thing. This patch blindly allows any value that resolves to a known driver, even if the user's request is a mismatch from what probing finds; then the next patch will further enhance things to verify that the user's request matches what we actually probe. With this and the next patch in place, we will finally be ready to deprecate the creation of images where a backing format was not explicitly specified by the user. Note that this is only for QemuOpts usage; there is no change to the QAPI to allow a format through -blockdev. Add a new iotest 301 just for qcow, to demonstrate the latest behavior, and to make it easier to show the improvements made in the next patch. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-6-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* block: Finish deprecation of 'qemu-img convert -n -o'Eric Blake2020-07-142-0/+11
| | | | | | | | | | | | | It's been two releases since we started warning; time to make the combination an error as promised. There was no iotest coverage, so add some. While touching the documentation, tweak another section heading for consistent style. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-3-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Flush stdout before before potential stderr messagesEric Blake2020-07-146-12/+12
| | | | | | | | | | | | | | | During 'qemu-img create ... 2>&1', if --quiet is not in force, we can end up with buffered I/O in stdout that was produced before failure, but which appears in output after failure. This is confusing; the fix is to flush stdout prior to attempting anything that might produce an error message. Several iotests demonstrate the resulting ordering change now that the merged outputs now reflect chronology. (An even better fix would be to avoid printf from within block.c altogether, but that's much more invasive...) Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-2-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* file-posix: Mitigate file fragmentation with extent size hintsKevin Wolf2020-07-144-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Especially when O_DIRECT is used with image files so that the page cache indirection can't cause a merge of allocating requests, the file will fragment on the file system layer, with a potentially very small fragment size (this depends on the requests the guest sent). On Linux, fragmentation can be reduced by setting an extent size hint when creating the file (at least on XFS, it can't be set any more after the first extent has been allocated), basically giving raw files a "cluster size" for allocation. This adds a create option to set the extent size hint, and changes the default from not setting a hint to setting it to 1 MB. The main reason why qcow2 defaults to smaller cluster sizes is that COW becomes more expensive, which is not an issue with raw files, so we can choose a larger size. The tradeoff here is only potentially wasted disk space. For qcow2 (or other image formats) over file-posix, the advantage should even be greater because they grow sequentially without leaving holes, so there won't be wasted space. Setting even larger extent size hints for such images may make sense. This can be done with the new option, but let's keep the default conservative for now. The effect is very visible with a test that intentionally creates a badly fragmented file with qemu-img bench (the time difference while creating the file is already remarkable) and then looks at the number of extents and the time a simple "qemu-img map" takes. Without an extent size hint: $ ./qemu-img create -f raw -o extent_size_hint=0 ~/tmp/test.raw 10G Formatting '/home/kwolf/tmp/test.raw', fmt=raw size=10737418240 extent_size_hint=0 $ ./qemu-img bench -f raw -t none -n -w ~/tmp/test.raw -c 1000000 -S 8192 -o 0 Sending 1000000 write requests, 4096 bytes each, 64 in parallel (starting at offset 0, step size 8192) Run completed in 25.848 seconds. $ ./qemu-img bench -f raw -t none -n -w ~/tmp/test.raw -c 1000000 -S 8192 -o 4096 Sending 1000000 write requests, 4096 bytes each, 64 in parallel (starting at offset 4096, step size 8192) Run completed in 19.616 seconds. $ filefrag ~/tmp/test.raw /home/kwolf/tmp/test.raw: 2000000 extents found $ time ./qemu-img map ~/tmp/test.raw Offset Length Mapped to File 0 0x1e8480000 0 /home/kwolf/tmp/test.raw real 0m1,279s user 0m0,043s sys 0m1,226s With the new default extent size hint of 1 MB: $ ./qemu-img create -f raw -o extent_size_hint=1M ~/tmp/test.raw 10G Formatting '/home/kwolf/tmp/test.raw', fmt=raw size=10737418240 extent_size_hint=1048576 $ ./qemu-img bench -f raw -t none -n -w ~/tmp/test.raw -c 1000000 -S 8192 -o 0 Sending 1000000 write requests, 4096 bytes each, 64 in parallel (starting at offset 0, step size 8192) Run completed in 11.833 seconds. $ ./qemu-img bench -f raw -t none -n -w ~/tmp/test.raw -c 1000000 -S 8192 -o 4096 Sending 1000000 write requests, 4096 bytes each, 64 in parallel (starting at offset 4096, step size 8192) Run completed in 10.155 seconds. $ filefrag ~/tmp/test.raw /home/kwolf/tmp/test.raw: 178 extents found $ time ./qemu-img map ~/tmp/test.raw Offset Length Mapped to File 0 0x1e8480000 0 /home/kwolf/tmp/test.raw real 0m0,061s user 0m0,040s sys 0m0,014s Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200707142329.48303-1-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* iotests/059: Filter out disk size with more standard filterKevin Wolf2020-07-142-506/+505Star
| | | | | | | | | | | | The actual disk space used by an image can vary between filesystems and depending on other settings like an extent size hint. Replace the one call of "$QEMU_IMG info" and the associated one-off sed filter with the more standard "_img_info" and the standard filter from common.filter. Apart from turning "vmdk" into "IMGFMT" and changing the placeholder for cid fields, this only removes the "disk size" line. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* iotests: Simplify _filter_img_create() a bitMax Reitz2020-07-144-61/+45Star
| | | | | | | | | | | | | | | | | | | Not only is it a bit stupid to try to filter multi-line "Formatting" output (because we only need it for a single test, which can easily be amended to no longer need it), it is also problematic when there can be output after a "Formatting" line that we do not want to filter as if it were part of it. So rename _filter_img_create to _do_filter_img_create, let it filter only a single line, and let _filter_img_create loop over all input lines, calling _do_filter_img_create only on those that match /^Formatting/ (basically, what _filter_img_create_in_qmp did already). (And fix 020 to work with that.) Reported-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200709110205.310942-1-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* Merge remote-tracking branch ↵Peter Maydell2020-07-132-2/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'remotes/huth-gitlab/tags/pull-request-2020-07-13' into staging * Some fuzzer related fixes * Fixes / improvements for the "configure" script * Doc updates * Gitlab pipeline-status script # gpg: Signature made Mon 13 Jul 2020 11:48:32 BST # gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5 # gpg: issuer "thuth@redhat.com" # gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full] # gpg: aka "Thomas Huth <thuth@redhat.com>" [full] # gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full] # gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown] # Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5 * remotes/huth-gitlab/tags/pull-request-2020-07-13: docs/system/s390x: Improve the 3270 documentation GitLab Gating CI: introduce pipeline-status contrib script disas/sh4: Add missing fallthrough annotations Remove the CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE switch docs/devel/fuzzing: Fix bugs in documentation tests/qtest/fuzz: Add missing spaces in description fuzz: add missing header for rcu_enable_atfork configure: do not clobber CFLAGS with --enable-fuzzing configure: fix malloc check Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * tests/qtest/fuzz: Add missing spaces in descriptionThomas Huth2020-07-131-2/+2
| | | | | | | | | | | | | | | | | | There should be a space between "forking" and "for". Message-Id: <20200709083719.22221-1-thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alexander Bulekov <alxndr@bu.edu> Signed-off-by: Thomas Huth <thuth@redhat.com>
| * fuzz: add missing header for rcu_enable_atforkAlexander Bulekov2020-07-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In 45222b9a90, I fixed a broken check for rcu_enable_atfork introduced in d6919e4cb6. I added a call to rcu_enable_atfork after the call to qemu_init in fuzz.c, but forgot to include the corresponding header, breaking --enable-fuzzing --enable-werror builds. Fixes: 45222b9a90 ("fuzz: fix broken qtest check at rcu_disable_atfork") Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Message-Id: <20200708200104.21978-3-alxndr@bu.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
* | Merge remote-tracking branch 'remotes/elmarco/tags/chardev-pull-request' ↵Peter Maydell2020-07-131-17/+105
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | into staging # gpg: Signature made Mon 13 Jul 2020 09:23:19 BST # gpg: using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5 # gpg: issuer "marcandre.lureau@redhat.com" # gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full] # gpg: aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full] # Primary key fingerprint: 87A9 BD93 3F87 C606 D276 F62D DAE8 E109 7596 9CE5 * remotes/elmarco/tags/chardev-pull-request: chardev: Extract system emulation specific code chardev: Reduce "char-mux.h" scope, rename it "chardev-internal.h" chardev: Restrict msmouse / wctablet / testdev to system emulation tests/test-char: Remove unused "chardev/char-mux.h" include monitor/misc: Remove unused "chardev/char-mux.h" include char: fix use-after-free with dup chardev & reconnect chardev: don't abort on attempt to add duplicated chardev char-socket: initialize reconnect timer only when the timer doesn't start Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * tests/test-char: Remove unused "chardev/char-mux.h" includePhilippe Mathieu-Daudé2020-07-131-1/+0Star
| | | | | | | | | | | | | | | | | | This test never required "chardev/char-mux.h", remove it. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200423202112.644-3-philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
| * char: fix use-after-free with dup chardev & reconnectMarc-André Lureau2020-07-131-2/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With a reconnect socket, qemu_char_open() will start a background thread. It should keep a reference on the chardev. Fixes invalid read: READ of size 8 at 0x6040000ac858 thread T7 #0 0x5555598d37b8 in unix_connect_saddr /home/elmarco/src/qq/util/qemu-sockets.c:954 #1 0x5555598d4751 in socket_connect /home/elmarco/src/qq/util/qemu-sockets.c:1109 #2 0x555559707c34 in qio_channel_socket_connect_sync /home/elmarco/src/qq/io/channel-socket.c:145 #3 0x5555596adebb in tcp_chr_connect_client_task /home/elmarco/src/qq/chardev/char-socket.c:1104 #4 0x555559723d55 in qio_task_thread_worker /home/elmarco/src/qq/io/task.c:123 #5 0x5555598a6731 in qemu_thread_start /home/elmarco/src/qq/util/qemu-thread-posix.c:519 #6 0x7ffff40d4431 in start_thread (/lib64/libpthread.so.0+0x9431) #7 0x7ffff40029d2 in __clone (/lib64/libc.so.6+0x1019d2) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20200420112012.567284-1-marcandre.lureau@redhat.com>
| * char-socket: initialize reconnect timer only when the timer doesn't startLi Feng2020-07-131-17/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the disconnect event is triggered in the connecting stage, the tcp_chr_disconnect_locked may be called twice. The first call: #0 qemu_chr_socket_restart_timer (chr=0x55555582ee90) at chardev/char-socket.c:120 #1 0x000055555558e38c in tcp_chr_disconnect_locked (chr=<optimized out>) at chardev/char-socket.c:490 #2 0x000055555558e3cd in tcp_chr_disconnect (chr=0x55555582ee90) at chardev/char-socket.c:497 #3 0x000055555558ea32 in tcp_chr_new_client (chr=chr@entry=0x55555582ee90, sioc=sioc@entry=0x55555582f0b0) at chardev/char-socket.c:892 #4 0x000055555558eeb8 in qemu_chr_socket_connected (task=0x55555582f300, opaque=<optimized out>) at chardev/char-socket.c:1090 #5 0x0000555555574352 in qio_task_complete (task=task@entry=0x55555582f300) at io/task.c:196 #6 0x00005555555745f4 in qio_task_thread_result (opaque=0x55555582f300) at io/task.c:111 #7 qio_task_wait_thread (task=0x55555582f300) at io/task.c:190 #8 0x000055555558f17e in tcp_chr_wait_connected (chr=0x55555582ee90, errp=0x555555802a08 <error_abort>) at chardev/char-socket.c:1013 #9 0x0000555555567cbd in char_socket_client_reconnect_test (opaque=0x5555557fe020 <client8unix>) at tests/test-char.c:1152 The second call: #0 0x00007ffff5ac3277 in raise () from /lib64/libc.so.6 #1 0x00007ffff5ac4968 in abort () from /lib64/libc.so.6 #2 0x00007ffff5abc096 in __assert_fail_base () from /lib64/libc.so.6 #3 0x00007ffff5abc142 in __assert_fail () from /lib64/libc.so.6 #4 0x000055555558d10a in qemu_chr_socket_restart_timer (chr=0x55555582ee90) at chardev/char-socket.c:125 #5 0x000055555558df0c in tcp_chr_disconnect_locked (chr=<optimized out>) at chardev/char-socket.c:490 #6 0x000055555558df4d in tcp_chr_disconnect (chr=0x55555582ee90) at chardev/char-socket.c:497 #7 0x000055555558e5b2 in tcp_chr_new_client (chr=chr@entry=0x55555582ee90, sioc=sioc@entry=0x55555582f0b0) at chardev/char-socket.c:892 #8 0x000055555558e93a in tcp_chr_connect_client_sync (chr=chr@entry=0x55555582ee90, errp=errp@entry=0x7fffffffd178) at chardev/char-socket.c:944 #9 0x000055555558ec78 in tcp_chr_wait_connected (chr=0x55555582ee90, errp=0x555555802a08 <error_abort>) at chardev/char-socket.c:1035 #10 0x000055555556804b in char_socket_client_test (opaque=0x5555557fe020 <client8unix>) at tests/test-char.c:1023 Run test/test-char to reproduce this issue. test-char: chardev/char-socket.c:125: qemu_chr_socket_restart_timer: Assertion `!s->reconnect_timer' failed. Signed-off-by: Li Feng <fengli@smartx.com> Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20200522025554.41063-1-fengli@smartx.com>
* | Merge remote-tracking branch ↵Peter Maydell2020-07-1257-247/+1196
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'remotes/stsquad/tags/pull-testing-and-misc-110720-2' into staging Testing and misc build updates: - tests/vm support for aarch64 VMs - tests/tcg better cross-compiler detection - update docker tooling to support registries - update docker support for xtensa - gitlab build docker images and store in registry - gitlab use docker images for builds - a number of skipIf updates to support move - linux-user MAP_FIXED_NOREPLACE fix - qht-bench compiler tweaks - configure fix for secret keyring - tsan fiber annotation clean-up - doc updates for mttcg/icount/gdbstub - fix cirrus to use brew bash for iotests - revert virtio-gpu breakage - fix LC_ALL to avoid sorting changes in iotests # gpg: Signature made Sat 11 Jul 2020 15:56:42 BST # gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44 # gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full] # Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44 * remotes/stsquad/tags/pull-testing-and-misc-110720-2: (50 commits) iotests: Set LC_ALL=C for sort Revert "vga: build virtio-gpu as module" tests: fix "make check-qtest" for modular builds .cirrus.yml: add bash to the brew packages tests/docker: update toolchain set in debian-xtensa-cross tests/docker: fall back more gracefully when pull fails docs: Add to gdbstub documentation the PhyMemMode docs/devel: add some notes on tcg-icount for developers docs/devel: convert and update MTTCG design document tests/qht-bench: Adjust threshold computation tests/qht-bench: Adjust testing rate by -1 travis.yml: Test also the other targets on s390x shippable: pull images from registry instead of building testing: add check-build target containers.yml: build with docker.py tooling gitlab: limit re-builds of the containers tests: improve performance of device-introspect-test gitlab: add avocado asset caching gitlab: enable check-tcg for linux-user tests linux-user/elfload: use MAP_FIXED_NOREPLACE in pgb_reserved_va ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * iotests: Set LC_ALL=C for sortMax Reitz2020-07-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Otherwise the result is basically unpredictable. (Note that the precise environment variable to control sorting order is LC_COLLATE, but LC_ALL overrides LC_COLLATE, and we do not want the sorting order to be messed up if LC_ALL is set in the environment.) Reported-by: John Snow <jsnow@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200710163253.381630-3-mreitz@redhat.com>
| * tests: fix "make check-qtest" for modular buildsGerd Hoffmann2020-07-111-0/+1
| | | | | | | | | | | | Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200710203652.9708-2-kraxel@redhat.com>
| * tests/docker: update toolchain set in debian-xtensa-crossMax Filippov2020-07-112-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch to the prebuilt xtensa toolchains release 2020.07. Drop csp toolchain as the csp core is not a part of QEMU. Add de233_fpu and dsp3400 toolchains to enable DFPU and FPU2000 tests. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [AJB: fix path in configure.sh] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200708082347.27318-1-jcmvbkbc@gmail.com> Message-Id: <20200709141327.14631-13-alex.bennee@linaro.org>
| * tests/docker: fall back more gracefully when pull failsAlex Bennée2020-07-111-5/+6
| | | | | | | | | | | | | | | | | | | | | | I only spotted this in the small window between my testing with my registry while waiting for the gitlab PR to go in. As we pre-pull the registry image we know if that fails there isn't any point attempting to use the cache. Fall back to the way we used to do it at that point. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20200709141327.14631-12-alex.bennee@linaro.org>
| * tests/qht-bench: Adjust threshold computationRichard Henderson2020-07-111-2/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 06c4cc3660b3, we split the multiplication in two parts to avoid a clang warning. But because double still rounds to 53 bits, this does not provide additional precision beyond multiplication by nextafter(0x1p64, 0), the largest representable value smaller than 2**64. However, since we have eliminated 1.0, mutiplying by 2**64 produces a better distribution of input values to the output values. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200626200950.1015121-3-richard.henderson@linaro.org>
| * tests/qht-bench: Adjust testing rate by -1Richard Henderson2020-07-111-7/+15
| | | | | | | | | | | | | | | | | | | | | | | | Since the seed must be non-zero, subtracting 1 means puts the rate in 0..UINT64_MAX-1, which allows the 0 and UINT64_MAX thresholds to corrspond to 0% (never) and 100% (always). Suggested-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200626200950.1015121-2-richard.henderson@linaro.org>
| * testing: add check-build targetAlex Bennée2020-07-111-4/+13
| | | | | | | | | | | | | | | | | | | | | | If we want to continue to split build and check phase it seems like a good idea to allow building of the tests during our multi-threaded build phase. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20200701135652.1366-40-alex.bennee@linaro.org>
| * tests: improve performance of device-introspect-testDaniel P. Berrangé2020-07-111-22/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total execution time with "-m slow" and x86_64 QEMU, drops from 3 minutes 15 seconds, down to 54 seconds. Individual tests drop from 17-20 seconds, down to 3-4 seconds. The cost of this change is that any QOM bugs resulting in the test failure will not be directly associated with the device that caused the failure. The test case is not frequently identifying such bugs though, and the cause is likely easily visible in the patch series that causes the failure. So overall the shorter running time is considered the more important factor. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> [thuth: Add the tree check to test_device_intro_none() and test_device_intro_abstract(), too, just to be sure...] Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200710060719.22386-1-thuth@redhat.com>
| * tests/docker: add a linux-user testing focused imageAlex Bennée2020-07-112-0/+54
| | | | | | | | | | | | | | | | | | | | | | | | We happily use all the cross images for both cross-building QEMU as well as building the linux-user tests. However calling docker from within docker seems not to work. As we can build in Debian anyway why not include an image that has all the compilers available for non-docker invocation. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200701135652.1366-33-alex.bennee@linaro.org>
| * tests/tcg: add more default compilers to configure.shAlex Bennée2020-07-111-5/+14
| | | | | | | | | | | | | | | | | | We were missing a bunch of compilers which we could use if they were locally installed. The defaults are based on Debian as they seem to be the best distro for well distributed cross-build compilers. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200701135652.1366-32-alex.bennee@linaro.org>
| * gitlab: add acceptance testing to system buildsAlex Bennée2020-07-112-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of migrating things from Travis to GitLab add the acceptance tests. To do this: - rename system1 to system-ubuntu-main - rename system2 to system-fedora-misc - split into build/check/acceptance - remove -j from check stages - use artifacts to save build stage - add post acceptance template and use Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200701135652.1366-31-alex.bennee@linaro.org>
| * tests/acceptance: skip LinuxInitrd 2gib with v4.16 on GitLabAlex Bennée2020-07-111-0/+3
| | | | | | | | | | | | | | | | | | This fails on GitLab but not when run locally on the same container image. It's very confusing. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20200701135652.1366-30-alex.bennee@linaro.org>
| * tests/acceptance: skip multicore mips_malta tests on GitLabAlex Bennée2020-07-111-0/+3
| | | | | | | | | | | | | | | | | | | | | | For some reason these tests fail all the time on GitLab. I can re-create the hang around 3% of the time locally but it doesn't seem to be MTTCG related. For now skipIf on GITLAB_CI. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> Message-Id: <20200701135652.1366-29-alex.bennee@linaro.org>
| * tests/acceptance: fix dtb path for machine_rx_gdbsimAlex Bennée2020-07-111-1/+1
| | | | | | | | | | | | | | | | | | The old path doesn't exist but the rx-virt.dtb file has the same checksum so lets use that. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20200701135652.1366-28-alex.bennee@linaro.org>
| * tests/acceptance: skip s390x_ccw_vrtio_tcg on GitLabAlex Bennée2020-07-111-0/+2
| | | | | | | | | | | | | | | | Currently the test takes more the 900 seconds on GitLab and then times out. Running on Travis seems to be OK. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200701135652.1366-27-alex.bennee@linaro.org>
| * tests/docker: add packages needed for check-acceptanceAlex Bennée2020-07-112-1/+16
| | | | | | | | | | | | | | | | | | | | We need additional python packages to run check-acceptance. Add them to the docker images we will be using later. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20200701135652.1366-26-alex.bennee@linaro.org>
| * tests/docker: add --registry support to toolingAlex Bennée2020-07-112-7/+43
| | | | | | | | | | | | | | | | | | | | This allows us to point the tools towards a registry from which they can grab pre-built layers instead of doing everything from scratch each time. To enable this we need to be using the DOCKER_BUILDKIT engine. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200701135652.1366-25-alex.bennee@linaro.org>
| * tests/docker: change tag naming scheme of our imagesAlex Bennée2020-07-1127-32/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We've been misusing the tag naming scheme for some time by overloading the post : section with the image type. Really it should be saved for the revision of that particular build. Move the details to the other side so we have: qemu/image-name with the implied :latest version added by the tooling. Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200701135652.1366-18-alex.bennee@linaro.org>
| * tests/docker: check for an parameters not empty stringAlex Bennée2020-07-111-1/+1
| | | | | | | | | | | | | | | | | | Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Suggested-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200701135652.1366-17-alex.bennee@linaro.org>
| * tests/vm: allow us to take advantage of MTTCGAlex Bennée2020-07-111-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | We currently limit TCG guests to -smp 1 but now we have added some aarch64 guests we can do better when running on x86_64 hardware. Raise the limit for TCG guests when it is safe to do so. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200701135652.1366-16-alex.bennee@linaro.org>
| * tests/vm: switch from optsparse to argparseAlex Bennée2020-07-112-46/+49
| | | | | | | | | | | | | | | | | | | | | | | | optparse has been deprecated since version 3.2 and argparse is the blessed replacement. Take the opportunity to enhance our help output showing defaults when called. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Robert Foley <robert.foley@linaro.org> Message-Id: <20200701135652.1366-15-alex.bennee@linaro.org>
| * tests/vm: Add workaround to consume consoleRobert Foley2020-07-112-2/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support to basevm.py so that we always drain the console chars. This makes use of support added in an earlier commit that allows QEMUMachine to use the ConsoleSocket. This is a workaround we found was needed since there is a known issue where QEMU will hang waiting for console characters to be consumed. We also added the option of logging the console to a file. LOG_CONSOLE=1 will now log the output to a file. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Acked-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-10-robert.foley@linaro.org> Message-Id: <20200701135652.1366-14-alex.bennee@linaro.org>
| * tests/vm: change scripts to use self._configRobert Foley2020-07-115-42/+38Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change converts existing scripts to using for example self.ROOT_PASS, to self._config['root_pass']. We made similar changes for GUEST_USER, and GUEST_PASS. This allows us also to remove the change in basevm.py, which adds __getattr__ for backwards compatibility. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200601211421.1277-8-robert.foley@linaro.org> Message-Id: <20200701135652.1366-12-alex.bennee@linaro.org>
| * tests/vm: Added a new script for centos.aarch64.Robert Foley2020-07-113-1/+280
| | | | | | | | | | | | | | | | | | | | | | | | centos.aarch64 creates a CentOS 8 image. Also added a new kickstart script used to build the centos.aarch64 image. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-7-robert.foley@linaro.org> Message-Id: <20200701135652.1366-11-alex.bennee@linaro.org>
| * tests/vm: Added a new script for ubuntu.aarch64.Robert Foley2020-07-114-0/+197
| | | | | | | | | | | | | | | | | | | | | | | | | | ubuntu.aarch64 provides a script to create an Ubuntu 18.04 VM. Another new file is also added aarch64vm.py, which is a module with common methods used by aarch64 VMs, such as how to create the flash images. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-6-robert.foley@linaro.org> Message-Id: <20200701135652.1366-10-alex.bennee@linaro.org>
| * tests/vm: Add common Ubuntu python moduleRobert Foley2020-07-112-34/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a common Ubuntu python module and make use of it with the ubuntu.i386 script. This is preparation for adding an Ubuntu script ubuntu.aarch64. Splitting out the common logic such as build_image() will reduce duplication. Signed-off-by: Robert Foley <robert.foley@linaro.org> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-5-robert.foley@linaro.org> Message-Id: <20200701135652.1366-9-alex.bennee@linaro.org>
| * tests/vm: Added configuration file supportRobert Foley2020-07-114-1/+146
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes to tests/vm/basevm.py to allow accepting a configuration file as a parameter. Allows for specifying VM options such as cpu, machine, memory, and arbitrary qemu arguments for specifying options such as NUMA configuration. Also added an example conf_example_aarch64.yml and conf_example_x86.yml. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-4-robert.foley@linaro.org> Message-Id: <20200701135652.1366-8-alex.bennee@linaro.org>
| * tests/vm: Add configuration to basevm.pyRobert Foley2020-07-111-39/+133
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added use of a configuration to tests/vm/basevm.py. The configuration provides parameters used to configure a VM. This allows for providing alternate configurations to the VM being created/launched. cpu, machine, memory, and NUMA configuration are all examples of configuration which we might want to vary on the VM being created or launched. This will for example allow for creating an aarch64 vm. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-3-robert.foley@linaro.org> Message-Id: <20200701135652.1366-7-alex.bennee@linaro.org>
| * tests/vm: pass args through to BaseVM's __init__Robert Foley2020-07-111-9/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding the args parameter to BaseVM's __init__. We will shortly need to pass more parameters to the class so let's just pass args rather than growing the parameter list. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-2-robert.foley@linaro.org> Message-Id: <20200701135652.1366-6-alex.bennee@linaro.org>
* | Merge remote-tracking branch 'remotes/philmd-gitlab/tags/avr-port-20200711' ↵Peter Maydell2020-07-114-0/+64
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | into staging 8bit AVR port from Michael Rolnik. Michael started to work on the AVR port few years ago [*] and kept improving the code over various series. List of people who help him (in chronological order): - Richard Henderson - Sarah Harris and Edward Robbins - Philippe Mathieu-Daudé and Aleksandar Markovic - Pavel Dovgalyuk - Thomas Huth [*] The oldest contribution I could find on the list is from 2016: https://lists.nongnu.org/archive/html/qemu-devel/2016-06/msg02985.html Tests included: $ avocado --show=app run -t arch:avr tests/acceptance/ Fetching asset from tests/acceptance/machine_avr6.py:AVR6Machine.test_freertos (1/1) tests/acceptance/machine_avr6.py:AVR6Machine.test_freertos: PASS (2.13 s) RESULTS : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0 JOB TIME : 2.35 s $ make check-qtest-avr TEST check-qtest-avr: tests/qtest/boot-serial-test TEST check-qtest-avr: tests/qtest/cdrom-test TEST check-qtest-avr: tests/qtest/device-introspect-test TEST check-qtest-avr: tests/qtest/machine-none-test TEST check-qtest-avr: tests/qtest/qmp-test TEST check-qtest-avr: tests/qtest/qmp-cmd-test TEST check-qtest-avr: tests/qtest/qom-test TEST check-qtest-avr: tests/qtest/test-hmp TEST check-qtest-avr: tests/qtest/qos-test CI results: . https://cirrus-ci.com/build/5697049146425344 . https://gitlab.com/philmd/qemu/-/pipelines/165328058 . https://travis-ci.org/github/philmd/qemu/builds/705817933 . https://app.shippable.com/github/philmd/qemu/runs/822/summary/console # gpg: Signature made Sat 11 Jul 2020 10:03:11 BST # gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE # gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full] # Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE * remotes/philmd-gitlab/tags/avr-port-20200711: (32 commits) target/avr/disas: Fix store instructions display order target/avr/cpu: Fix $PC displayed address target/avr/cpu: Drop tlb_flush() in avr_cpu_reset() target/avr: Add section into QEMU documentation tests/acceptance: Test the Arduino MEGA2560 board tests/boot-serial: Test some Arduino boards (AVR based) hw/avr: Add limited support for some Arduino boards hw/avr: Add some ATmega microcontrollers hw/avr: Add support for loading ELF/raw binaries hw/misc: avr: Add limited support for power reduction device hw/timer: avr: Add limited support for 16-bit timer peripheral hw/char: avr: Add limited support for USART peripheral tests/machine-none: Add AVR support target/avr: Register AVR support with the rest of QEMU target/avr: Add support for disassembling via option '-d in_asm' target/avr: Initialize TCG register variables target/avr: Add instruction translation - CPU main translation function target/avr: Add instruction translation - MCU Control Instructions target/avr: Add instruction translation - Bit and Bit-test Instructions target/avr: Add instruction translation - Data Transfer Instructions ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * | tests/acceptance: Test the Arduino MEGA2560 boardMichael Rolnik2020-07-111-0/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The test is based on https://github.com/seharris/qemu-avr-tests/tree/master/free-rtos/Demo demo which. If working correctly, prints 'ABCDEFGHIJKLMNOPQRSTUVWX' out. it also demostrates that timer and IRQ are working As the path name demonstrates, the FreeRTOS tests target a board based on a ATMega2560 MCU. We have one, the Arduino MEGA2560. Complementary documentation: https://feilipu.me/2012/01/15/ethermega-arduino-mega-2560-and-freertos/ https://feilipu.me/2015/11/24/arduino_freertos/ (see 'Compatibility') Signed-off-by: Michael Rolnik <mrolnik@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [rth: Squash multiple avocado fixups from f4bug] Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Tested-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * | tests/boot-serial: Test some Arduino boards (AVR based)Michael Rolnik2020-07-112-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Print out 'T' through serial port. The Arduino Duemilanove is based on a AVR5 CPU, while the Arduino MEGA2560 on a AVR6 CPU. Signed-off-by: Michael Rolnik <mrolnik@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [rth: Squash Arduino adjustments from f4bug] Tested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Acked-by: Thomas Huth <thuth@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20200705140315.260514-29-huth@tuxfamily.org>
| * | tests/machine-none: Add AVR supportMichael Rolnik2020-07-111-0/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a single code line that will automatically provide 'machine none' test. Signed-off-by: Michael Rolnik <mrolnik@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20200705140315.260514-28-huth@tuxfamily.org> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
* | target/i386: fix IEEE SSE floating-point exception raisingJoseph Myers2020-07-112-0/+817
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SSE instruction implementations all fail to raise the expected IEEE floating-point exceptions because they do nothing to convert the exception state from the softfloat machinery into the exception flags in MXCSR. Fix this by adding such conversions. Unlike for x87, emulated SSE floating-point operations might be optimized using hardware floating point on the host, and so a different approach is taken that is compatible with such optimizations. The required invariant is that all exceptions set in env->sse_status (other than "denormal operand", for which the SSE semantics are different from those in the softfloat code) are ones that are set in the MXCSR; the emulated MXCSR is updated lazily when code reads MXCSR, while when code sets MXCSR, the exceptions in env->sse_status are set accordingly. A few instructions do not raise all the exceptions that would be raised by the softfloat code, and those instructions are made to save and restore the softfloat exception state accordingly. Nothing is done about "denormal operand"; setting that (only for the case when input denormals are *not* flushed to zero, the opposite of the logic in the softfloat code for such an exception) will require custom code for relevant instructions, or else architecture-specific conditionals in the softfloat code for when to set such an exception together with custom code for various SSE conversion and rounding instructions that do not set that exception. Nothing is done about trapping exceptions (for which there is minimal and largely broken support in QEMU's emulation in the x87 case and no support at all in the SSE case). Signed-off-by: Joseph Myers <joseph@codesourcery.com> Message-Id: <alpine.DEB.2.21.2006252358000.3832@digraph.polyomino.org.uk> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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