Autogenerated code in trace.h/trace.c and friends is specific to the
config-host.mak TRACE_BACKENDS setting and must be regenerated when
./configure --enable-trace-backend= changes settings.

This patch ensures that changes to TRACE_BACKENDS are detected.  For
example, the trace-root.h file is now updated after switching trace
backends:

  $ ./configure && make
  $ cp trace-root.h /tmp/old-trace-root.h
  $ ./configure --enable-trace-backend=simple && make
  $ diff -u /tmp/old-trace-root.h trace-root.h
Reported-by: NChristophe Lyon <christophe.lyon@st.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-id: 20190129025343.4788-1-stefanha@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Trace previous state, move tracepoint to runstate_set start (to cover
all cases for debugging), add string representations of traced states.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190124125154.474650-1-vsementsov@virtuozzo.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

The dtrace systemtap trace backend for QEMU is very powerful but it is
also somewhat unfriendly to users who aren't familiar with systemtap,
or who don't need its power right now.

  stap -e "....some strange script...."

The 'log' backend for QEMU by comparison is very crude but incredibly
easy to use:

 $ qemu -d trace:qio* ...some args...
 23266@1547735759.137292:qio_channel_socket_new Socket new ioc=0x563a8a39d400
 23266@1547735759.137305:qio_task_new Task new task=0x563a891d0570 source=0x563a8a39d400 func=0x563a86f1e6c0 opaque=0x563a89078000
 23266@1547735759.137326:qio_task_thread_start Task thread start task=0x563a891d0570 worker=0x563a86f1ce50 opaque=0x563a891d9d90
 23273@1547735759.137491:qio_task_thread_run Task thread run task=0x563a891d0570
 23273@1547735759.137503:qio_channel_socket_connect_sync Socket connect sync ioc=0x563a8a39d400 addr=0x563a891d9d90
 23273@1547735759.138108:qio_channel_socket_connect_fail Socket connect fail ioc=0x563a8a39d400

This commit introduces a way to do simple printf style logging of probe
points using systemtap. In particular it creates another set of tapsets,
one per emulator:

  /usr/share/systemtap/tapset/qemu-*-log.stp

These pre-define probe functions which simply call printf() on their
arguments. The printf() format string is taken from the normal
trace-events files, with a little munging to the format specifiers
to cope with systemtap's more restrictive syntax.

With this you can now do

 $ stap -e 'probe qemu.system.x86_64.log.qio*{}'
 22806@1547735341399856820 qio_channel_socket_new Socket new ioc=0x56135d1d7c00
 22806@1547735341399862570 qio_task_new Task new task=0x56135cd66eb0 source=0x56135d1d7c00 func=0x56135af746c0 opaque=0x56135bf06400
 22806@1547735341399865943 qio_task_thread_start Task thread start task=0x56135cd66eb0 worker=0x56135af72e50 opaque=0x56135c071d70
 22806@1547735341399976816 qio_task_thread_run Task thread run task=0x56135cd66eb0

We go one step further though and introduce a 'qemu-trace-stap' tool to
make this even easier

 $ qemu-trace-stap run qemu-system-x86_64 'qio*'
 22806@1547735341399856820 qio_channel_socket_new Socket new ioc=0x56135d1d7c00
 22806@1547735341399862570 qio_task_new Task new task=0x56135cd66eb0 source=0x56135d1d7c00 func=0x56135af746c0 opaque=0x56135bf06400
 22806@1547735341399865943 qio_task_thread_start Task thread start task=0x56135cd66eb0 worker=0x56135af72e50 opaque=0x56135c071d70
 22806@1547735341399976816 qio_task_thread_run Task thread run task=0x56135cd66eb0

This tool is clever in that it will automatically change the
SYSTEMTAP_TAPSET env variable to point to the directory containing the
right set of probes for the QEMU binary path you give it. This is useful
if you have QEMU installed in /usr but are trying to test and trace a
binary in /home/berrange/usr/qemu-git. In that case you'd do

 $ qemu-trace-stap run /home/berrange/usr/qemu-git/bin/qemu-system-x86_64 'qio*'

And it'll make sure /home/berrange/usr/qemu-git/share/systemtap/tapset
is used for the trace session

The 'qemu-trace-stap' script takes a verbose arg so you can understand
what it is running

 $ qemu-trace-stap run /home/berrange/usr/qemu-git/bin/qemu-system-x86_64 'qio*'
 Using tapset dir '/home/berrange/usr/qemu-git/share/systemtap/tapset' for binary '/home/berrange/usr/qemu-git/bin/qemu-system-x86_64'
 Compiling script 'probe qemu.system.x86_64.log.qio* {}'
 Running script, <Ctrl>-c to quit
 ...trace output...

It can enable multiple probes at once

 $ qemu-trace-stap run qemu-system-x86_64 'qio*' 'qcrypto*' 'buffer*'

By default it monitors all existing running processes and all future
launched proceses. This can be restricted to a specific PID using the
--pid arg

 $ qemu-trace-stap run --pid 2532 qemu-system-x86_64 'qio*'

Finally if you can't remember what probes are valid it can tell you

 $ qemu-trace-stap list qemu-system-x86_64
 ahci_check_irq
 ahci_cmd_done
 ahci_dma_prepare_buf
 ahci_dma_prepare_buf_fail
 ahci_dma_rw_buf
 ahci_irq_lower
 ...snip...

Or list just those matching a prefix pattern

 $ qemu-trace-stap list -v qemu-system-x86_64 'qio*'
 Using tapset dir '/home/berrange/usr/qemu-git/share/systemtap/tapset' for binary '/home/berrange/usr/qemu-git/bin/qemu-system-x86_64'
 Listing probes with name 'qemu.system.x86_64.log.qio*'
 qio_channel_command_abort
 qio_channel_command_new_pid
 qio_channel_command_new_spawn
 qio_channel_command_wait
 qio_channel_file_new_fd
 ...snip...
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-id: 20190123120016.4538-5-berrange@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

The '%m' format instructs glibc's printf()/syslog() implementation to
insert the contents of strerror(errno). Since this is a glibc extension
it should generally be avoided in QEMU due to need for portability to a
variety of platforms.

Even though vfio is Linux-only code that could otherwise use "%m", it
must still be avoided in trace-events files because several of the
backends do not use the format string and so this error information is
invisible to them.

The errno string value should be given as an explicit trace argument
instead, making it accessible to all backends. This also allows it to
work correctly with future patches that use the format string with
systemtap's simple printf code.
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-id: 20190123120016.4538-4-berrange@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

When generating the trace-events-all file, the build system simply
concatenates all the individual trace-events files. If any one of those
files does not have a final newline, the printf format string will have
the contents of the first line of the next file appended to it, which is
usually a '#' comment.
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-id: 20190123120016.4538-3-berrange@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

The QXL_IO_LOG command allows the guest to send log messages to the host
via a buffer in the QXLRam struct. QEMU prints these to the console if
the qxl 'guestdebug' option is set to non-zero. It will also feed them
to the trace subsystem if any backends are built-in.

In both cases the log_buf data will get treated as being as a nul
terminated string, by the printf '%s' format specifier and / or other
code reading the buffer.

QEMU does nothing to guarantee that the log_buf really is nul terminated,
so there is potential for out of bounds array access.

This would affect any QEMU which has the log, syslog or ftrace trace
backends built into QEMU. It can only be triggered if the 'qxl_io_log'
trace event is enabled, however, so they are not vulnerable without
specific administrative action to enable this.

It would also affect QEMU if the 'guestdebug' parameter is set to a
non-zero value, which again is not the default and requires explicit
admin opt-in.
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-id: 20190123120016.4538-2-berrange@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

ui: highres logo for sdl and gtk, bugfixes for vnc and egl.

# gpg: Signature made Mon 21 Jan 2019 14:11:39 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ui-20190121-pull-request:
  egl-helpers.h: do not depend on X11 Window type, use EGLNativeWindowType
  vnc: detect and optimize pageflips
  sdl: add support for high resolution window icon
  ui: fix icon display for GTK frontend under GNOME Shell with Wayland
  ui: install logo icons to $prefix/share/icons
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Merge remote-tracking branch 'remotes/edgar/tags/edgar/xilinx-next-2019-01-22.for-upstream' into staging

Pullreq 2019-01-22

# gpg: Signature made Tue 22 Jan 2019 11:42:41 GMT
# gpg:                using RSA key 29C596780F6BCA83
# gpg: Good signature from "Edgar E. Iglesias (Xilinx key) <edgar.iglesias@xilinx.com>"
# gpg:                 aka "Edgar E. Iglesias <edgar.iglesias@gmail.com>"
# Primary key fingerprint: AC44 FEDC 14F7 F1EB EDBF  4151 29C5 9678 0F6B CA83

* remotes/edgar/tags/edgar/xilinx-next-2019-01-22.for-upstream:
  target/microblaze: Add props enabling exceptions on failed bus accesses
  hw/microblaze: s3adsp1800: Create an unimplemented GPIO area
  target/microblaze: Switch to transaction_failed hook
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

ipxe: update to latest git master

# gpg: Signature made Tue 22 Jan 2019 06:33:53 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ipxe-20190122-pull-request:
  ipxe: update to latest git master
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

nbd patches for 2019-01-21

Add 'qemu-nbd --list' for probing a remote NBD server's advertisements.

- Eric Blake: 0/21 nbd: add qemu-nbd --list

# gpg: Signature made Mon 21 Jan 2019 22:44:27 GMT
# gpg:                using RSA key A7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>"
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>"
# gpg:                 aka "[jpeg image of size 6874]"
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2019-01-21: (21 commits)
  iotests: Enhance 223, 233 to cover 'qemu-nbd --list'
  nbd/client: Work around 3.0 bug for listing meta contexts
  qemu-nbd: Add --list option
  nbd/client: Add meta contexts to nbd_receive_export_list()
  nbd/client: Add nbd_receive_export_list()
  nbd/client: Refactor nbd_opt_go() to support NBD_OPT_INFO
  nbd/client: Pull out oldstyle size determination
  nbd/client: Split handshake into two functions
  nbd/client: Refactor return of nbd_receive_negotiate()
  nbd/client: Split out nbd_receive_one_meta_context()
  nbd/client: Split out nbd_send_meta_query()
  nbd/client: Change signature of nbd_negotiate_simple_meta_context()
  nbd/client: Move export name into NBDExportInfo
  nbd/client: Refactor nbd_receive_list()
  qemu-nbd: Avoid strtol open-coding
  nbd/server: Favor [u]int64_t over off_t
  nbd/server: Hoist length check to qmp_nbd_server_add
  qemu-nbd: Sanity check partition bounds
  qemu-nbd: Enhance man page
  maint: Allow for EXAMPLES in texi2pod
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Add MicroBlaze CPU properties to enable exceptions on failed
bus accesses.
Reviewed-by: NLuc Michel <luc.michel@greensocs.com>
Reviewed-by: NAlistair Francis <alistair.francis@wdc.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>

Create an unimplemented GPIO area instead of leaving it unassigned.
Reviewed-by: NLuc Michel <luc.michel@greensocs.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>

Switch the microblaze target from the old unassigned_access hook
to the transaction_failed hook.

The notable difference is that rather than it being called
for all physical memory accesses which fail (including
those made by DMA devices or by the gdbstub), it is only
called for those made by the CPU via its MMU. For
microblaze this makes no difference because none of the
target CPU code needs to make loads or stores by physical
address.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
[EI: Add space in qemu_log()]
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>

- Use more CONFIG Makefile switches for qtests
- Get rid of global_qtests in some more qtests
- typedef cleanups
- Fixes for compiling with Clang
- Force C standard to gnu99
- Don't use -nographic in qtests

# gpg: Signature made Tue 22 Jan 2019 06:18:41 GMT
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>"
# gpg:                 aka "Thomas Huth <thuth@redhat.com>"
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>"
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>"
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2019-01-22: (26 commits)
  tests: remove rule for nonexisting qdev-monitor-test
  tests/hexloader-test: Don't pass -nographic to the QEMU under test
  configure: Force the C standard to gnu99
  seccomp: Work-around GCC 4.x bug in gnu99 mode
  block: Work-around a bug in libiscsi 1.9.0 when used in gnu99 mode
  linux-user: Fix compilation with clang 3.4
  virtio-net: Fix VirtIONet typedef redefinition
  ppc: Fix duplicated typedefs to be able to compile with Clang in gnu99 mode
  ppc: Move spapr-related prototypes from xics.h into a seperate header file
  ui/console: Remove PixelFormat from qemu/typedefs.h
  ui/console: Remove MouseTransformInfo from qemu/typedefs.h
  ui/console: Remove DisplayState/DisplaySurface from "qemu/typedefs.h"
  ui/console: Remove QemuDmaBuf from "qemu/typedefs.h"
  audio: Remove AudioState from "qemu/typedefs.h"
  hw/i386: Remove PCMachineClass from "qemu/typedefs.h"
  hw/char/serial: Remove SerialState from "qemu/typedefs.h"
  hw/bt: Remove HCIInfo from "qemu/typedefs.h"
  hw/i2c/smbus: Remove SMBusDevice from "qemu/typedefs.h"
  hw/ide/ahci: Remove AllwinnerAHCIState from "qemu/typedefs.h"
  hw/pcmcia: Remove PCMCIACardState from "qemu/typedefs.h"
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

git shortlog ipxe-qemu-20170717-0600d3ae94-0..ipxe-qemu-20190122-de4565cbe7-0
-----------------------------------------------------------------------------

Aaron Young (1):
      [libc] Fix strcmp()/strncmp() to return proper values

Ameer Mahagneh (1):
      [golan] Set log_max_qp to 1

Bruce Rogers (1):
      [build] Disable gcc stringop-truncation warnings

Christian Hesse (1):
      [build] Handle R_X86_64_PLT32 from binutils 2.31

Hannes Reinecke (1):
      [iscsi] Parse IPv6 address in root path

Heinrich Schuchardt (2):
      [efi] Accept (and ignore) R_ARM_V4BX relocations
      [efi] Add support for R_ARM_REL32 relocations

Ignat Korchagin (1):
      [efi] Fix error handling path in efi_snp_probe

Janos Mattyasovszky (1):
      [intel] Add PCI device ID for X550-T2

Joseph Wong (1):
      [tg3] Add support for SerDes PHY initialization

Ladi Prosek (1):
      [crypto] Fail fast if cross-certificate source is empty

Laurent Gourvénec (1):
      [acpi] Compute and check checksum for ACPI tables

Martin Habets (2):
      [netdevice] Make netdev_irq_enabled() independent of netdev_irq_supported()
      [sfc] Add support for X25xx adapters

Michael Brown (88):
      [efi] Enumerate PCI BARs in same order as SnpDxe
      [build] Conditionalise use of -mabi=lp64 for ARM64 builds
      [build] Fix use of inline assembly on GCC 4.8 ARM64 builds
      [build] Fix ARM32 EFI builds with current EDK2 headers
      [acpi] Fix spurious uninitialised-variable warning on some gcc versions
      [hyperv] Do not steal ownership from the Gen 2 UEFI firmware
      [shell] Enable "shell" command even when BANNER_TIMEOUT is zero
      [romprefix] Avoid unaligned accesses within ROM headers
      [malloc] Avoid false positive warnings from valgrind
      [linux] Impose receive quota on tap driver
      [efi] Raise TPL when calling UNDI entry point
      [netdevice] Cancel all pending transmissions on any transmit error
      [monojob] Check for job progress only once per timer tick
      [job] Allow jobs to report an arbitrary status message
      [downloader] Allow underlying downloads to provide detailed job progress
      [monojob] Display job status message, if present
      [peerdist] Gather and report peer statistics during download
      [netdevice] Add "hwaddr" setting
      [resolv] Use pass-through interfaces for name resolution multiplexer
      [dns] Report current DNS query as job progress status message
      [efi] Check buffer length for packets retrieved via our SNP protocol
      [efi] Match behaviour of SnpDxe for truncated received packets
      [dns] Ensure DNS names are NUL-terminated when used as diagnostic strings
      [efi] Continue to connect remaining handles after connection errors
      [build] Exclude selected directories from Secure Boot builds
      [efi] Inhibit our driver Start() method during disconnection attempts
      [efi] Allow for building with older versions of elf.h system header
      [crypto] Fix endianness typo in comment
      [crypto] Eliminate repetitions in MD5 round constant table
      [crypto] Add MD4 message digest algorithm
      [ntlm] Add support for NTLM authentication mechanism
      [http] Gracefully handle offers of multiple authentication schemes
      [http] Handle parsing of WWW-Authenticate header within authentication scheme
      [http] Add support for NTLM authentication
      [xen] Skip probing of any unsupported device types
      [http] Include error messages for 4xx and 5xx response codes
      [http] Report unsuccessful response status lines at DBGVL_LOG
      [image] Omit URI query string and fragment from download progress messages
      [legal] Add missing FILE_LICENCE declarations
      [legal] Add missing FILE_LICENCE declarations
      [build] Avoid use of "ld --oformat binary"
      [ena] Add driver for Amazon ENA virtual function NIC
      [skel] Remove MII interface
      [ena] Fix spurious uninitialised variable warning on older versions of gcc
      [xhci] Assume an invalid PSI table if any invalid PSI value is observed
      [intel] Work around broken reset mechanism in i219 devices
      [http] Allow for domain names within NTLM user names
      [xhci] Consume event TRB before reporting completion to USB core
      [efi] Run at TPL_CALLBACK to protect against UEFI timers
      [efi] Raise TPL within EFI_SIMPLE_NETWORK_PROTOCOL entry points
      [efi] Raise TPL within EFI_USB_IO_PROTOCOL entry points
      [process] Include process name in debug messages
      [efi] Drop to TPL_APPLICATION when gathering entropy
      [efi] Raise TPL within EFI_DRIVER_BINDING_PROTOCOL entry points
      [librm] Add facility to provide register and stack dump for CPU exceptions
      [golan] Do not assume all devices are identical
      [lacp] Mark link as blocked if partner is not yet up and running
      [lacp] Fix debug message to match documentation
      [tftp] Prevent potential division by zero
      [profile] Prevent potential division by zero
      [ocsp] Centralise test for whether or not an OCSP check is required
      [ocsp] Allow OCSP checks to be disabled
      [lacp] Check the partner's own state when checking for blocked links
      [efi] Provide Map_Mem() and associated UNDI callbacks
      [time] Add support for the ACPI power management timer
      [rng] Use fixed-point calculations for min-entropy quantities
      [build] Prevent use of MMX and SSE registers
      [undi] Treat invalid IRQ numbers as non-fatal errors
      [librm] Provide symbols for inline code placed into other sections
      [librm] Ensure that inline code symbols are unique
      [tls] Ensure received data list is initialised before calling tls_free()
      [list] Add list_is_first_entry() and list_is_last_entry()
      [tls] Rename tls_session to tls_connection
      [tls] Ensure that window change is propagated to plainstream interface
      [efi] Release SNP devices before starting SAN boot image
      [efi] Do not raise TPL within EFI_DRIVER_BINDING_PROTOCOL.Supported()
      [undi] Include subsystem IDs in broken interrupt device check
      [rhine] Fix usage of mii_read()
      [velocity] Fix usage of mii_read() and mii_write()
      [mii] Separate concepts of MII interface and MII device
      [tcp] Add missing packed attribute on struct tcp_header
      [mii] Fix typo in parameter name
      [http] Work around stateful authentication schemes
      [build] Use positive-form tests when checking for supported warnings
      [rndis] Clean up error handling path in register_rndis()
      [ethernet] Use standard 1500 byte MTU unless explicitly overridden
      [intelxl] Add driver for Intel 40 Gigabit Ethernet NICs
      [zbin] Fix compiler warning with GCC 9

Peter von Konigsmark (2):
      [exanic] Power up optical PHYs (if present)
      [exanic] Add PCI device ID for another X40 variant

Petr Borsodi (3):
      [pci] Correct invalid base-class/sub-class/prog-if order in PCIR
      [util] Improve processing of ROM images in Option::ROM
      [util] Add support for EFI ROM images

Richard Moore (1):
      [intel] Add various PCI device IDs

Rob Taglang (3):
      [intel] Add PCI_ROM entry for Intel i354 NIC
      [intelx] Add PCI_ROM entry for Intel X553 NIC
      [efi] Exclude link-layer header length from MaxPacketSize

Robin Smidsrød (1):
      [util] Support reversed sort ordering when generating NIC list

Roman Kagan (2):
      [rndis] Register netdev with MAC filled
      [vmbus] Do not expect version in version_response

Steven Haber (1):
      [intelx] Add support for Intel X552 NIC

Sylvie Barlow (3):
      [mii] Add mii_find()
      [mii] Add bit-bashing interface
      [icplus] Add driver for IC+ network card
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This test was merged into drive_del-test in 2014.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
Fixes: e2f3f221 ("Merge of qdev-monitor-test, blockdev-test")
Signed-off-by: NThomas Huth <thuth@redhat.com>

The hexloader test invokes QEMU with the -nographic argument. This
is unnecessary, because the qtest_initf() function will pass it
-display none, which suffices to disable the graphical window.
It also means that the QEMU process will make the stdin/stdout
O_NONBLOCK. Since O_NONBLOCK is not per-file descriptor but per
"file description", this non-blocking behaviour is then shared
with any other process that's using the stdin/stdout of the
'make check' run, including make itself. This can result in make
falling over with "make: write error: stdout" because it got
an unexpected EINTR trying to write output messages to the terminal.
This is particularly noticable if running 'make check' in a loop with
  while make check; do true; done
(It does not affect single make check runs so much because the
shell will remove the O_NONBLOCK status before it reads the
terminal for interactive input.)

Remove the unwanted -nographic argument.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Different versions of GCC and Clang use different versions of the C standard.
This repeatedly caused problems already, e.g. with duplicated typedefs:

 https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg05829.html

or with for-loop variable initializers:

 https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg00237.html

To avoid these problems, we should enforce the C language version to the
same level for all compilers. Since our minimum compiler versions is
GCC v4.8, our best option is "gnu99" for C code right now ("gnu17" is not
available there yet, and "gnu11" is marked as "experimental"), and "gnu++98"
for the few C++ code that we have in the repository.
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: NGreg Kurz <groug@kaod.org>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: NThomas Huth <thuth@redhat.com>

We'd like to compile QEMU with -std=gnu99, but GCC 4.8 currently
fails to compile qemu-seccomp.c in this mode:

qemu-seccomp.c:45:1: error: initializer element is not constant
 };
 ^
qemu-seccomp.c:45:1: error: (near initialization for ‘sched_setscheduler_arg[0]’)

This is due to a compiler bug which has just been fixed in GCC 5.0:

 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63567

Since we still want to support GCC 4.8 for a while and also want to use
gnu99 mode, work-around the issue by expanding the macro manually.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: NEduardo Otubo <otubo@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

The header "scsi-lowlevel.h" of libiscsi 1.9.0 contains some bad
"inline" prototype definitions which GCC refuses to compile in its
gnu99 mode:

In file included from block/iscsi.c:52:0:
/usr/include/iscsi/scsi-lowlevel.h:810:13: error: inline function
‘scsi_set_uint16’ declared but never defined [-Werror]
 inline void scsi_set_uint16(unsigned char *c, uint16_t val);
             ^
/usr/include/iscsi/scsi-lowlevel.h:809:13: error: inline function
‘scsi_set_uint32’ declared but never defined [-Werror]
 inline void scsi_set_uint32(unsigned char *c, uint32_t val);
             ^
[...]

This has been fixed by upstream libiscsi in version 1.10.0 (see
https://github.com/sahlberg/libiscsi/commit/7692027d6c11 ), but
since we still want to support 1.9.0 for CentOS 7 / RHEL7, we
have to work-around the issue by redefining the "inline" keyword
to use the old "gnu89" mode behavior via "gnu_inline" instead.
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Clang version 3.4.2 does not know the -Wpragmas option yet and bails
out with an error when we try to disable it in linux-user/qemu.h.
Fortunately, clang has a __has_warning() macro which allows us to add
an explicit check for the option that we want to ignore. With that we
can check for the availability of "-Waddress-of-packed-member" properly
and do not need the "-Wpragmas" at all here.

Fixes: 850d5e33Reviewed-by: NLaurent Vivier <laurent@vivier.eu>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Commit 2974e916 introduced the VirtioNetRscChain structure which
refer to a VirtIONet, declared later, thus required VirtIONet typedef
to use a forward declaration.
However, when compiling with Clang in -std=gnu99 mode, this triggers
the following warning/error:

    CC      hw/net/virtio-net.o
  In file included from qemu/hw/net/virtio-net.c:22:
  include/hw/virtio/virtio-net.h:189:3: error: redefinition of typedef 'VirtIONet' is a C11 feature [-Werror,-Wtypedef-redefinition]
  } VirtIONet;
    ^
  include/hw/virtio/virtio-net.h:110:26: note: previous definition is here
  typedef struct VirtIONet VirtIONet;
                           ^
  1 error generated.
  make: *** [rules.mak:69: hw/net/virtio-net.o] Error 1

Fix it by removing the duplicate typedef definition.
Reported-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NGreg Kurz <groug@kaod.org>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

When compiling the ppc code with clang and -std=gnu99, there are a
couple of warnings/errors like this one:

  CC      ppc64-softmmu/hw/intc/xics.o
In file included from hw/intc/xics.c:35:
include/hw/ppc/xics.h:43:25: error: redefinition of typedef 'ICPState' is a C11 feature
      [-Werror,-Wtypedef-redefinition]
typedef struct ICPState ICPState;
                        ^
target/ppc/cpu.h:1181:25: note: previous definition is here
typedef struct ICPState ICPState;
                        ^
Work around the problems by including the proper headers in spapr.h
and by using struct forward declarations in cpu.h.
Reviewed-by: NGreg Kurz <groug@kaod.org>
Signed-off-by: NThomas Huth <thuth@redhat.com>

When compiling with Clang in -std=gnu99 mode, there is a warning/error:

  CC      ppc64-softmmu/hw/intc/xics_spapr.o
In file included from /home/thuth/devel/qemu/hw/intc/xics_spapr.c:34:
/home/thuth/devel/qemu/include/hw/ppc/xics.h:203:34: error: redefinition of typedef 'sPAPRMachineState' is a C11 feature
      [-Werror,-Wtypedef-redefinition]
typedef struct sPAPRMachineState sPAPRMachineState;
                                 ^
/home/thuth/devel/qemu/include/hw/ppc/spapr_irq.h:25:34: note: previous definition is here
typedef struct sPAPRMachineState sPAPRMachineState;
                                 ^

We have to remove the duplicated typedef here and include "spapr.h" instead.
But "spapr.h" should not be included for the pnv machine files. So move
the spapr-related prototypes into a new file called "xics_spapr.h" instead.
Reviewed-by: NGreg Kurz <groug@kaod.org>
Reviewed-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Header files requiring PixelFormat already include "ui/qemu-pixman.h".

To clean "qemu/typedefs.h", move the declaration to "ui/qemu-pixman.h"
(removing the forward declaration).
Suggested-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Header files requiring MouseTransformInfo already include "ui/console.h".

To clean "qemu/typedefs.h", move the declaration to "ui/console.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring DisplayState/DisplaySurface already include "ui/console.h".

To clean "qemu/typedefs.h", move the declarations to "ui/console.h"
(removing DisplaySurface forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring QemuDmaBuf already include "ui/console.h".

To clean "qemu/typedefs.h", move the declaration to "ui/console.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring AudioState already include "audio_int.h".

To clean "qemu/typedefs.h", move the declaration to "audio_int.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring PCMachineClass already include "hw/i386/pc.h".

To clean "qemu/typedefs.h", move the declaration to "hw/i386/pc.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring SerialState already include "hw/char/serial.h".

To clean "qemu/typedefs.h", move the declaration to "hw/char/serial.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring HCIInfo already include "sysemu/bt.h".

To clean "qemu/typedefs.h", move the declaration to "sysemu/bt.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring SMBusDevice already include "hw/i2c/smbus.h".

To clean "qemu/typedefs.h", move the forward declaration
to "hw/i2c/smbus.h".
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Files requiring AllwinnerAHCIState already include "hw/ide/ahci.h".

To clean "qemu/typedefs.h", move the declaration to "hw/ide/ahci.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

There is only one header file requiring this typedef (hw/arm/pxa.h),
let it include "hw/pcmcia.h" directly to simplify "qemu/typedefs.h".

To clean "qemu/typedefs.h", move the declaration to "hw/pcmcia.h"
(removing the forward declaration).
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
[thuth: slightly tweaked commit message]
Signed-off-by: NThomas Huth <thuth@redhat.com>

PS2State is only used in "hw/input/ps2.h", there is no
need to expose it via "qemu/typedefs.h".

To clean "qemu/typedefs.h", move the forward declaration
to "hw/input/ps2.h".
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

Pass around the QTestState, so that we can finally get rid of the
out-of-favor global_qtest variable in this file, too.
Signed-off-by: NThomas Huth <thuth@redhat.com>

Pass around the QTestState from function to function, so that we can finally
get rid of the out-of-favor global_qtest variable in this file, too.
Signed-off-by: NThomas Huth <thuth@redhat.com>

Pass around the test state explicitly, to be able to use the qtest_in*()
and qtest_out*() function in this test.
Signed-off-by: NThomas Huth <thuth@redhat.com>

To be able to build and test QEMU binaries where certain devices or machines
are disabled, we have to use the right CONFIG_* switches to run certain tests
only if the corresponding device or machine really has been compiled into
the binary.
Reviewed-by: NWainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>