Commit Graph

71655 Commits

Author SHA1 Message Date
Max Filippov
1cc5274016 linux-user: drop redundant handling of environment variables
QEMU_STRACE and QEMU_RAND_SEED are handled by the parse_args, no need to
do it again in main.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190906165736.5612-1-jcmvbkbc@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:47:06 +02:00
Max Filippov
130ea8322b target/xtensa: linux-user: add call0 ABI support
Xtensa binaries built for call0 ABI don't rotate register window on
function calls and returns. Invocation of signal handlers from the
kernel is therefore different in windowed and call0 ABIs.
There's currently no way to determine xtensa ELF binary ABI from the
binary itself. Add handler for the -xtensa-abi-call0 command line
parameter/QEMU_XTENSA_ABI_CALL0 envitonment variable to the qemu-user
and record ABI choice. Use it to initialize PS.WOE in xtensa_cpu_reset.
Check PS.WOE in setup_rt_frame to determine how a signal should be
delivered.

Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Message-Id: <20190906165713.5558-1-jcmvbkbc@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:47:06 +02:00
Josh Kunz
dc12567a53 linux-user: Support gdb 'qOffsets' query for ELF
This is needed to support debugging PIE ELF binaries running under QEMU
user mode. Currently, `code_offset` and `data_offset` remain unset for
all ELF binaries, so GDB is unable to correctly locate the position of
the binary's text and data.

The fields `code_offset`, and `data_offset` were originally added way
back in 2006 to support debugging of bFMT executables (978efd6aac),
and support was just never added for ELF. Since non-PIE binaries are
loaded at exactly the address specified in the binary, GDB does not need
to relocate any symbols, so the buggy behavior is not normally observed.

http://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qOffsets-packet

Buglink: https://bugs.launchpad.net/qemu/+bug/1528239
Signed-off-by: Josh Kunz <jkz@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190816233422.16715-1-jkz@google.com>
[lv: added link to documentation]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:46:52 +02:00
Richard Henderson
0b689da375 linux-user/arm: Adjust MAX_RESERVED_VA for M-profile
Limit the virtual address space for M-profile cpus to 2GB,
so that we avoid all of the magic addresses in the top half
of the M-profile system map.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190822185929.16891-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:46:34 +02:00
Richard Henderson
8f67b9c694 linux-user: Pass CPUState to MAX_RESERVED_VA
Turn the scalar macro into a functional macro.  Move the creation
of the cpu up a bit within main() so that we can pass it to the
invocation of MAX_RESERVED_VA.  Delay the validation of the -R
parameter until MAX_RESERVED_VA is computed.

So far no changes to any of the MAX_RESERVED_VA macros to actually
use the cpu in any way, but ARM will need it.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190822185929.16891-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:46:34 +02:00
Shu-Chun Weng
9bdfa4d23f linux-user: add memfd_create
Add support for the memfd_create syscall. If the host does not have the
libc wrapper, translate to a direct syscall with NC-macro.

Buglink: https://bugs.launchpad.net/qemu/+bug/1734792
Signed-off-by: Shu-Chun Weng <scw@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190819180947.180725-1-scw@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:46:17 +02:00
Alex Bennée
7f4341e84b linux-user: fail and report on bad dfilter specs
Just passing NULL means we end up ignoring the bad dfilter spec
instead of reporting it and exiting as we should.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190830143648.2967-1-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:46:05 +02:00
Shu-Chun Weng
895e2ef521 linux-user: erroneous fd_trans_unregister call
timer_getoverrun returns the "overrun count" for the timer, which is not
a file descriptor and thus should not call fd_trans_unregister on it.

Signed-off-by: Shu-Chun Weng <scw@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190819185348.221825-1-scw@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-11 08:45:57 +02:00
Richard Henderson
2041df4a05 linux-user: Add AT_HWCAP2 for aarch64-linux-user
Add the HWCAP2_* bits from kernel version v5.3-rc3.
Enable the bits corresponding to ARMv8.5-CondM and ARMv8.5-FRINT.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190809171156.3476-1-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-10 10:29:07 +02:00
Laurent Vivier
9d3019bce3 linux-user: remove useless variable
filename is only used to open the file if AT_EXECFD is not provided.
But exec_path already contains the path of the file to open.
Remove filename as it is only used in main.c whereas exec_path is
also used in syscall.c.

Fixes: d088d664f2 ("linux-user: identify running binary in /proc/self/exe")
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20190714134028.315-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-10 10:28:50 +02:00
Peter Maydell
89ea03a7dc Add the m68k next-cube machine
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Merge remote-tracking branch 'remotes/huth-gitlab/tags/m68k-pull-2019-09-07' into staging

Add the m68k next-cube machine

# gpg: Signature made Sat 07 Sep 2019 16:32:53 BST
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "huth@tuxfamily.org"
# 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/m68k-pull-2019-09-07:
  .travis.yml: Let the avocado job run the NeXTcube tests
  tests/acceptance: Add test of NeXTcube framebuffer using OCR
  m68k: Add an entry for the NeXTcube machine to the MAINTAINERS file
  m68k: Add serial controller to the NeXTcube machine
  escc: introduce a selector for the register bit
  m68k: Add NeXTcube machine
  m68k: Add NeXTcube keyboard device
  m68k: Add NeXTcube framebuffer device emulation

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-09 09:48:34 +01:00
Philippe Mathieu-Daudé
2531164959 .travis.yml: Let the avocado job run the NeXTcube tests
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20190813134921.30602-3-philmd@redhat.com>
[huth: Rebased patch to master branch]
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:35:41 +02:00
Philippe Mathieu-Daudé
ca2e7e463f tests/acceptance: Add test of NeXTcube framebuffer using OCR
Add a test of the NeXTcube framebuffer using the Tesseract OCR
engine on a screenshot of the framebuffer device.

The test is very quick:

  $ avocado --show=app,console run tests/acceptance/machine_m68k_nextcube.py
  JOB ID     : 78844a92424cc495bd068c3874d542d1e20f24bc
  JOB LOG    : /home/phil/avocado/job-results/job-2019-08-13T13.16-78844a9/job.log
   (1/3) tests/acceptance/machine_m68k_nextcube.py:NextCubeMachine.test_bootrom_framebuffer_size: PASS (2.16 s)
   (2/3) tests/acceptance/machine_m68k_nextcube.py:NextCubeMachine.test_bootrom_framebuffer_ocr_with_tesseract_v3: -
  ue r pun Honl'flx ; 5‘ 55‘
  avg ncaaaaa 25 MHZ, memary jag m
  Backplane slat «a
  Ethernet address a a r a r3 2
  Memgry sackets aea canflqured far 16MB Darlly page made stMs but have 16MB page made stMs )nstalled
  Memgry sackets a and 1 canflqured far 16MB Darlly page made stMs but have 16MB page made stMs )nstalled
  [...]
  Yestlnq the rpu, 5::
  system test raneg Errar egge 51
  Egg: cammand
  Default pggc devlce nut fauna
  NEXY>I
  PASS (2.64 s)
   (3/3) tests/acceptance/machine_m68k_nextcube.py:NextCubeMachine.test_bootrom_framebuffer_ocr_with_tesseract_v4: SKIP: tesseract v4 OCR tool not available
  RESULTS    : PASS 2 | ERROR 0 | FAIL 0 | SKIP 1 | WARN 0 | INTERRUPT 0 | CANCEL 0
  JOB TIME   : 5.35 s

Documentation on how to install tesseract:
  https://github.com/tesseract-ocr/tesseract/wiki#installation

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20190813134921.30602-2-philmd@redhat.com>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:33:49 +02:00
Thomas Huth
1810b81501 m68k: Add an entry for the NeXTcube machine to the MAINTAINERS file
I don't have much clue about the NeXT hardware, but at least I know now
the source files a little bit, so I volunteer to pick up patches and send
PULL requests for them until someone else with more knowledge steps up
to do this job instead.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-7-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:32:52 +02:00
Thomas Huth
b17bed5b17 m68k: Add serial controller to the NeXTcube machine
The NeXTcube uses a normal 8530 serial controller, so we can simply use
our normal "escc" device here.
While we're at it, also add a boot-serial-test for the next-cube machine,
now that the serial output works.

Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-6-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:32:34 +02:00
Laurent Vivier
b43047a20f escc: introduce a selector for the register bit
On Sparc and PowerMac, the bit 0 of the address selects the register
type (control or data) and bit 1 selects the channel (B or A).

On m68k Macintosh and NeXTcube, the bit 0 selects the channel and
bit 1 the register type.

This patch introduces a new parameter (bit_swap) to the device interface
to indicate bits usage must be swapped between registers and channels.

For the moment all the machines use the bit 0, but this change will be
needed to emulate the Quadra 800 or NeXTcube machine.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
[thh: added NeXTcube to the patch description]
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-5-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:32:12 +02:00
Thomas Huth
956a78118b m68k: Add NeXTcube machine
It is still quite incomplete (no SCSI, no floppy emulation, no network,
etc.), but the firmware already shows up the debug monitor prompt in the
framebuffer display, so at least the very basics are already working.

This code has been taken from Bryce Lanham's GSoC 2011 NeXT branch at

 https://github.com/blanham/qemu-NeXT/blob/next-cube/hw/next-cube.c

and altered quite a bit to fit the latest interface and coding conventions
of the current QEMU.

Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-4-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:31:51 +02:00
Thomas Huth
c8e8bc85a6 m68k: Add NeXTcube keyboard device
It is likely still quite incomplete (e.g. mouse and interrupts are not
implemented yet), but it is good enough for keyboard input at the firmware
monitor.
This code has been taken from Bryce Lanham's GSoC 2011 NeXT branch at

 https://github.com/blanham/qemu-NeXT/blob/next-cube/hw/next-kbd.c

and altered to fit the latest interface of the current QEMU (e.g. to use
memory_region_init_io() instead of cpu_register_physical_memory()).

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-3-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:31:33 +02:00
Thomas Huth
e3355a0ca2 m68k: Add NeXTcube framebuffer device emulation
The NeXTcube uses a linear framebuffer with 4 greyscale colors and
a fixed resolution of 1120 * 832.
This code has been taken from Bryce Lanham's GSoC 2011 NeXT branch at

 https://github.com/blanham/qemu-NeXT/blob/next-cube/hw/next-fb.c

and altered to fit the latest interface of the current QEMU (e.g.
the device has been "qdev"-ified etc.).

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-2-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
2019-09-07 08:30:34 +02:00
Peter Maydell
019217c3b3 nbd patches for 2019-09-05
- Advertise NBD_FLAG_CAN_MULTI_CONN on readonly images
 - Tolerate larger set of server error responses during handshake
 - More precision on handling fallocate() failures due to alignment
 - Better documentation of NBD connection URIs
 - Implement new extension NBD_CMD_FLAG_FAST_ZERO to benefit qemu-img convert
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Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2019-09-05-v2' into staging

nbd patches for 2019-09-05

- Advertise NBD_FLAG_CAN_MULTI_CONN on readonly images
- Tolerate larger set of server error responses during handshake
- More precision on handling fallocate() failures due to alignment
- Better documentation of NBD connection URIs
- Implement new extension NBD_CMD_FLAG_FAST_ZERO to benefit qemu-img convert

# gpg: Signature made Thu 05 Sep 2019 22:08:17 BST
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2019-09-05-v2:
  nbd: Implement server use of NBD FAST_ZERO
  nbd: Implement client use of NBD FAST_ZERO
  nbd: Prepare for NBD_CMD_FLAG_FAST_ZERO
  nbd: Improve per-export flag handling in server
  docs: Update preferred NBD device syntax
  block: workaround for unaligned byte range in fallocate()
  nbd: Tolerate more errors to structured reply request
  nbd: Use g_autofree in a few places
  nbd: Advertise multi-conn for shared read-only connections

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-06 09:28:31 +01:00
Eric Blake
b491dbb7f8 nbd: Implement server use of NBD FAST_ZERO
The server side is fairly straightforward: we can always advertise
support for detection of fast zero, and implement it by mapping the
request to the block layer BDRV_REQ_NO_FALLBACK.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190823143726.27062-5-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: update iotests 223, 233]
2019-09-05 16:04:53 -05:00
Eric Blake
f061656cc3 nbd: Implement client use of NBD FAST_ZERO
The client side is fairly straightforward: if the server advertised
fast zero support, then we can map that to BDRV_REQ_NO_FALLBACK
support.  A server that advertises FAST_ZERO but not WRITE_ZEROES
is technically broken, but we can ignore that situation as it does
not change our behavior.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190823143726.27062-4-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
2019-09-05 16:03:26 -05:00
Eric Blake
0a4795455c nbd: Prepare for NBD_CMD_FLAG_FAST_ZERO
Commit fe0480d6 and friends added BDRV_REQ_NO_FALLBACK as a way to
avoid wasting time on a preliminary write-zero request that will later
be rewritten by actual data, if it is known that the write-zero
request will use a slow fallback; but in doing so, could not optimize
for NBD.  The NBD specification is now considering an extension that
will allow passing on those semantics; this patch updates the new
protocol bits and 'qemu-nbd --list' output to recognize the bit, as
well as the new errno value possible when using the new flag; while
upcoming patches will improve the client to use the feature when
present, and the server to advertise support for it.

The NBD spec recommends (but not requires) that ENOTSUP be avoided for
all but failures of a fast zero (the only time it is mandatory to
avoid an ENOTSUP failure is when fast zero is supported but not
requested during write zeroes; the questionable use is for ENOTSUP to
other actions like a normal write request).  However, clients that get
an unexpected ENOTSUP will either already be treating it the same as
EINVAL, or may appreciate the extra bit of information.  We were
equally loose for returning EOVERFLOW in more situations than
recommended by the spec, so if it turns out to be a problem in
practice, a later patch can tighten handling for both error codes.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190823143726.27062-3-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: tweak commit message, also handle EOPNOTSUPP]
2019-09-05 16:03:13 -05:00
Eric Blake
dbb38caac5 nbd: Improve per-export flag handling in server
When creating a read-only image, we are still advertising support for
TRIM and WRITE_ZEROES to the client, even though the client should not
be issuing those commands.  But seeing this requires looking across
multiple functions:

All callers to nbd_export_new() passed a single flag based solely on
whether the export allows writes.  Later, we then pass a constant set
of flags to nbd_negotiate_options() (namely, the set of flags which we
always support, at least for writable images), which is then further
dynamically modified with NBD_FLAG_SEND_DF based on client requests
for structured options.  Finally, when processing NBD_OPT_EXPORT_NAME
or NBD_OPT_EXPORT_GO we bitwise-or the original caller's flag with the
runtime set of flags we've built up over several functions.

Let's refactor things to instead compute a baseline of flags as soon
as possible which gets shared between multiple clients, in
nbd_export_new(), and changing the signature for the callers to pass
in a simpler bool rather than having to figure out flags.  We can then
get rid of the 'myflags' parameter to various functions, and instead
refer to client for everything we need (we still have to perform a
bitwise-OR for NBD_FLAG_SEND_DF during NBD_OPT_EXPORT_NAME and
NBD_OPT_EXPORT_GO, but it's easier to see what is being computed).
This lets us quit advertising senseless flags for read-only images, as
well as making the next patch for exposing FAST_ZERO support easier to
write.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190823143726.27062-2-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: improve commit message, update iotest 223]
2019-09-05 16:02:54 -05:00
Eric Blake
0c61ebb0cd docs: Update preferred NBD device syntax
Mention the preferred URI form, especially since NBD is trying to
standardize that form: https://lists.debian.org/nbd/2019/06/msg00012.html

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190903145634.20237-1-eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
2019-09-05 16:01:47 -05:00
Andrey Shinkevich
294682cc3a block: workaround for unaligned byte range in fallocate()
Revert the commit 118f99442d 'block/io.c: fix for the allocation failure'
and use better error handling for file systems that do not support
fallocate() for an unaligned byte range. Allow falling back to pwrite
in case fallocate() returns EINVAL.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Message-Id: <1566913973-15490-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2019-09-05 16:01:31 -05:00
Eric Blake
5de47735c7 nbd: Tolerate more errors to structured reply request
A server may have a reason to reject a request for structured replies,
beyond just not recognizing them as a valid request; similarly, it may
have a reason for rejecting a request for a meta context.  It doesn't
hurt us to continue talking to such a server; otherwise 'qemu-nbd
--list' of such a server fails to display all available details about
the export.

Encountered when temporarily tweaking nbdkit to reply with
NBD_REP_ERR_POLICY.  Present since structured reply support was first
added (commit d795299b reused starttls handling, but starttls is
different in that we can't fall back to other behavior on any error).

Note that for an unencrypted client trying to connect to a server that
requires encryption, this defers the point of failure to when we
finally execute a strict command (such as NBD_OPT_GO or NBD_OPT_LIST),
now that the intermediate NBD_OPT_STRUCTURED_REPLY does not diagnose
NBD_REP_ERR_TLS_REQD as fatal; but as the protocol eventually gets us
to a command where we can't continue onwards, the changed error
message doesn't cause any security concerns.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190824172813.29720-3-eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
[eblake: fix iotest 233]
2019-09-05 15:57:37 -05:00
Eric Blake
df18c04edf nbd: Use g_autofree in a few places
Thanks to our recent move to use glib's g_autofree, I can join the
bandwagon.  Getting rid of gotos is fun ;)

There are probably more places where we could register cleanup
functions and get rid of more gotos; this patch just focuses on the
labels that existed merely to call g_free.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190824172813.29720-2-eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
2019-09-05 15:52:45 -05:00
Eric Blake
61cc872456 nbd: Advertise multi-conn for shared read-only connections
The NBD specification defines NBD_FLAG_CAN_MULTI_CONN, which can be
advertised when the server promises cache consistency between
simultaneous clients (basically, rules that determine what FUA and
flush from one client are able to guarantee for reads from another
client).  When we don't permit simultaneous clients (such as qemu-nbd
without -e), the bit makes no sense; and for writable images, we
probably have a lot more work before we can declare that actions from
one client are cache-consistent with actions from another.  But for
read-only images, where flush isn't changing any data, we might as
well advertise multi-conn support.  What's more, advertisement of the
bit makes it easier for clients to determine if 'qemu-nbd -e' was in
use, where a second connection will succeed rather than hang until the
first client goes away.

This patch affects qemu as server in advertising the bit.  We may want
to consider patches to qemu as client to attempt parallel connections
for higher throughput by spreading the load over those connections
when a server advertises multi-conn, but for now sticking to one
connection per nbd:// BDS is okay.

See also: https://bugzilla.redhat.com/1708300
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190815185024.7010-1-eblake@redhat.com>
[eblake: tweak blockdev-nbd.c to not request shared when writable,
fix iotest 233]
Reviewed-by: John Snow <jsnow@redhat.com>
2019-09-05 15:51:55 -05:00
Peter Maydell
90b1e3afd3 - Make the core libqtest library independent from global_qtest
- Clean up docs from hard-coded qemu-system-* names
 - Install libattr-dev and libcap-dev in gitlab-ci to test virtio-9p
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Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-09-05-v2' into staging

- Make the core libqtest library independent from global_qtest
- Clean up docs from hard-coded qemu-system-* names
- Install libattr-dev and libcap-dev in gitlab-ci to test virtio-9p

# gpg: Signature made Thu 05 Sep 2019 15:52:30 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-2019-09-05-v2:
  gitlab-ci.yml: Install libattr-devel and libcap-devel to test virtio-9p
  qemu-doc: Do not hard-code the name of the QEMU binary
  tests/vm: Take the J=x setting into account for the vm-boot-ssh targets, too
  tests/libqtest: Use libqtest-single.h in tests that require global_qtest
  tests/libqtest: Move global_test wrapper function into a separate header
  tests: Remove unnecessary global_qtest references
  tests/libqos: Replace clock_step with qtest_clock_step in virtio code
  tests/libqos/e1000e: Make e1000e libqos functions independent from global_qtest
  tests/migration: Do not use functions anymore that rely on global_qtest

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 17:09:13 +01:00
Peter Maydell
74aa913fe6 docs: add docs about use of automatic cleanup functions
This is ostensibly about adding docs for the g_autofree/g_autoptr
 macros. As part of doing that, however, the existing HACKING doc
 is merged into the CODING_STYLE doc and the text is converted to
 rst with a table of contents.
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Merge remote-tracking branch 'remotes/berrange/tags/docs-pull-request' into staging

docs: add docs about use of automatic cleanup functions

This is ostensibly about adding docs for the g_autofree/g_autoptr
macros. As part of doing that, however, the existing HACKING doc
is merged into the CODING_STYLE doc and the text is converted to
rst with a table of contents.

# gpg: Signature made Thu 05 Sep 2019 14:43:44 BST
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/docs-pull-request:
  docs: split the CODING_STYLE doc into distinct groups
  docs: document use of automatic cleanup functions in glib
  docs: merge HACKING.rst contents into CODING_STYLE.rst
  docs: convert README, CODING_STYLE and HACKING to RST syntax

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 16:33:39 +01:00
Thomas Huth
e7dc804ef0 gitlab-ci.yml: Install libattr-devel and libcap-devel to test virtio-9p
So far the gitlab-ci was not testing virtio-9p yet, since we did not
install libattr-devel and libcap-devel in any of the pipelines. Do
it now to get some more test coverage.

Message-Id: <20190905111729.1197-1-thuth@redhat.com>
Acked-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2019-09-05 16:00:01 +02:00
Daniel P. Berrangé
9f8efa74d3 docs: split the CODING_STYLE doc into distinct groups
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2019-09-05 14:41:00 +01:00
Daniel P. Berrangé
821f296756 docs: document use of automatic cleanup functions in glib
Document the use of g_autofree and g_autoptr in glib for automatic
freeing of memory.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2019-09-05 14:27:06 +01:00
Daniel P. Berrangé
637f39568f docs: merge HACKING.rst contents into CODING_STYLE.rst
The split of information between the two docs is rather arbitary and
unclear. It is simpler for contributors if all the information is in
one file.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2019-09-05 14:27:06 +01:00
Daniel P. Berrangé
336a7451e8 docs: convert README, CODING_STYLE and HACKING to RST syntax
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2019-09-05 14:27:06 +01:00
Richard Henderson
eac2f39602 target/arm: Inline gen_bx_im into callers
There are only two remaining uses of gen_bx_im.  In each case, we
know the destination mode -- not changing in the case of gen_jmp
or changing in the case of trans_BLX_i.  Use this to simplify the
surrounding code.

For trans_BLX_i, use gen_jmp for the actual branch.  For gen_jmp,
use gen_set_pc_im to set up the single-step.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-70-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
0831403b08 target/arm: Clean up disas_thumb_insn
Now that everything is converted, remove the rest of
the legacy decode.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-69-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
67b54c554b target/arm: Convert T16, long branches
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-68-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
8d4a4dc849 target/arm: Convert T16, Unconditional branch
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-67-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
46beb58efb target/arm: Convert T16, load (literal)
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-66-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
151c2f2841 target/arm: Convert T16, shift immediate
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-65-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
43f7e42c7d target/arm: Convert T16, Miscellaneous 16-bit instructions
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-64-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
629fcaa71c target/arm: Convert T16, Conditional branches, Supervisor call
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-63-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
564b125fb9 target/arm: Convert T16, push and pop
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-62-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
279de61a21 target/arm: Split gen_nop_hint
Now that all callers pass a constant value, split the switch
statement into the individual trans_* functions.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190904193059.26202-61-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
56e6250ede target/arm: Convert T16, nop hints
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190904193059.26202-60-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
ae3002b021 target/arm: Convert T16, Reverse bytes
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-59-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
20556e7bd6 target/arm: Convert T16, Change processor state
Add a check for ARMv6 in trans_CPS.  We had this correct in
the T16 path, but had previously forgotten the check on the
A32 and T32 paths.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-58-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00
Richard Henderson
e6f69612cc target/arm: Convert T16, extract
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-57-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-05 13:23:04 +01:00