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Mark Cave-Ayland d6cbd8f7a1 target/m68k: don't set SSW ATC bit for physical bus errors
If a NuBus slot doesn't contain a card, the Quadra hardware generates a physical
bus error if the CPU attempts to access the slot address space. Both Linux and
MacOS use a separate bus error handler during NuBus accesses in order to detect
and recover when addressing empty slots.

According to the MC68040 users manual the ATC bit of the SSW is used to
distinguish between ATC faults and physical bus errors. MacOS specifically checks
the stack frame generated by a NuBus error and panics if the SSW ATC bit is set.

Update m68k_cpu_transaction_failed() so that the SSW ATC bit is not set if the
memory API returns MEMTX_DECODE_ERROR which will be used to indicate that an
access to an empty NuBus slot occurred.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210308121155.2476-2-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-03-11 21:12:32 +01:00
.github .github: point Repo Lockdown bot to GitLab repo 2021-02-09 20:53:56 +00:00
.gitlab-ci.d docker: OpenSBI build job depends on OpenSBI container 2021-03-09 06:03:53 +01:00
accel * Add some missing gitlab-CI job dependencies 2021-03-10 17:22:45 +00:00
audio audio: space prohibited between function name and parenthesis'(' 2021-01-15 11:49:26 +01:00
authz
backends hostmem: Don't report pmem attribute if unsupported 2021-02-18 18:34:47 -05:00
block nbd patches for 2021-03-09 2021-03-11 13:57:08 +00:00
bsd-user exec: Use cpu_untagged_addr in g2h; split out g2h_untagged 2021-02-16 11:04:53 +00:00
capstone@f8b1b83301
chardev chardev: add nodelay option 2021-03-06 11:41:54 +01:00
contrib contrib: Open brace '{' following struct go on the same line 2021-02-18 08:17:27 +00:00
crypto crypto: Add spaces around operator 2021-01-29 17:07:53 +00:00
default-configs Remove deprecated target tilegx 2021-03-09 11:26:32 +01:00
disas Hexagon (disas) disassembler 2021-02-18 07:48:22 -08:00
docs Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
dtc@85e5d83984
dump qapi: More complex uses of QAPI_LIST_APPEND 2021-01-28 08:08:45 +01:00
fpu
fsdev meson: Declare have_virtfs_proxy_helper in main meson.build 2021-01-23 15:55:04 -05:00
gdb-xml target/riscv: Remove built-in GDB XML files for CSRs 2021-01-16 10:57:21 -08:00
hw Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
include Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
io io: error_prepend() in qio_channel_readv_full_all() causes segfault 2021-02-12 07:50:59 -06:00
libdecnumber
linux-headers Update linux headers to 5.11-rc2 2021-01-21 11:19:45 +01:00
linux-user Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
meson@776acd2a80
migration migration: dirty-bitmap: Allow control of bitmap persistence 2021-02-12 15:24:36 -06:00
monitor monitor/qmp: Stop processing requests when shutdown is requested 2021-02-15 15:10:14 +01:00
nbd nbd: server: Report holes for raw images 2021-03-08 13:08:45 -06:00
net qtest: delete superfluous inclusions of qtest.h 2021-03-09 06:03:53 +01:00
pc-bios roms/opensbi: Upgrade from v0.8 to v0.9 2021-03-04 09:43:29 -05:00
plugins accel/tcg: allow plugin instrumentation to be disable via cflags 2021-02-18 08:19:23 +00:00
po
python Python: close the log file kept by QEMUMachine before reading it 2021-02-15 21:40:16 -05:00
qapi qapi: Remove QMP events and commands from user-mode builds 2021-03-05 15:40:49 +01:00
qga * fix tracing vs -daemonize (Daniel) 2021-03-08 13:51:41 +00:00
qobject qobject: braces {} are necessary for all arms of this statement 2021-02-04 13:20:29 +01:00
qom qom: Check for wellformed id in user_creatable_add_type() 2021-03-06 11:41:54 +01:00
replay replay: fix icount request when replaying clock access 2021-02-16 17:15:39 +01:00
roms roms/opensbi: Upgrade from v0.8 to v0.9 2021-03-04 09:43:29 -05:00
scripts scripts/ci/gitlab-pipeline-status: give more info when pipeline not found 2021-03-09 06:03:53 +01:00
scsi scsi: inline sg_io_sense_from_errno() into the callers. 2021-03-06 11:42:56 +01:00
semihosting semihosting: Move hw/semihosting/ -> semihosting/ 2021-03-10 15:34:12 +00:00
slirp@8f43a99191
softmmu Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
storage-daemon qemu-storage-daemon: add --pidfile option 2021-03-08 14:55:18 +01:00
stubs semihosting: Move include/hw/semihosting/ -> include/semihosting/ 2021-03-10 15:34:12 +00:00
subprojects/libvhost-user build-sys: add libvhost-user missing dependencies 2021-01-23 09:26:41 -05:00
target target/m68k: don't set SSW ATC bit for physical bus errors 2021-03-11 21:12:32 +01:00
tcg tcg/tci: Merge mov, not and neg operations 2021-03-06 11:45:21 -08:00
tests Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
tools virtiofs: drop remapped security.capability xattr as needed 2021-03-04 10:26:16 +00:00
trace trace: fix "-trace file=..." 2021-03-06 11:42:57 +01:00
ui ui/console: Pass placeholder surface to displays 2021-03-04 09:35:36 +01:00
util nbd patches for 2021-03-09 2021-03-11 13:57:08 +00:00
.cirrus.yml
.dir-locals.el
.editorconfig .editorconfig: update the automatic mode setting for Emacs 2021-03-10 15:34:11 +00:00
.exrc
.gdbinit
.gitattributes maint: Tell git that *.py files should use python diff hunks 2021-02-15 22:13:34 -05:00
.gitignore Makefile: add GNU global tags support 2021-01-18 10:04:31 +00:00
.gitlab-ci.yml Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
.gitmodules gitmodules: use GitLab repos instead of qemu.org 2021-02-09 20:53:56 +00:00
.gitpublish
.mailmap
.patchew.yml
.readthedocs.yml
.travis.yml travis.yml: Limit simultaneous jobs to 3 2021-02-19 06:31:40 +01:00
block.c nbd patches for 2021-03-09 2021-03-11 13:57:08 +00:00
blockdev-nbd.c qemu-nbd: Use SOMAXCONN for socket listen() backlog 2021-02-12 07:42:08 -06:00
blockdev.c nbd patches for 2021-03-09 2021-03-11 13:57:08 +00:00
blockjob.c nbd patches for 2021-03-09 2021-03-11 13:57:08 +00:00
configure Remove deprecated target tilegx 2021-03-09 11:26:32 +01:00
COPYING
COPYING.LIB
cpu.c accel/tcg: split TCG-only code from cpu_exec_realizefn 2021-02-05 10:24:14 -10:00
cpus-common.c
disas.c
exec-vary.c
gdbstub.c semihosting: Move include/hw/semihosting/ -> include/semihosting/ 2021-03-10 15:34:12 +00:00
gitdm.config
hmp-commands-info.hx
hmp-commands.hx hmp: remove "change vnc TARGET" command 2021-01-23 15:55:07 -05:00
iothread.c multi-process: define MPQemuMsg format and transmission functions 2021-02-10 09:23:28 +00:00
job-qmp.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
job.c job: add .cancel handler for the driver 2021-02-12 11:23:19 -06:00
Kconfig semihosting: Move hw/semihosting/ -> semihosting/ 2021-03-10 15:34:12 +00:00
Kconfig.host multi-process: Add config option for multi-process QEMU 2021-02-09 20:53:56 +00:00
LICENSE
MAINTAINERS Testing, guest-loader and other misc tweaks 2021-03-11 16:20:58 +00:00
Makefile build-sys: invoke ninja with -d keepdepfile 2021-03-06 11:42:57 +01:00
memory_ldst.c.inc fuzz: ignore address_space_map is_write flag 2021-02-08 14:43:54 +01:00
meson_options.txt multiprocess: move feature to meson_options.txt 2021-02-25 14:14:32 +01:00
meson.build semihosting: Move hw/semihosting/ -> semihosting/ 2021-03-10 15:34:12 +00:00
module-common.c
os-posix.c os: deprecate the -enable-fips option and QEMU's FIPS enforcement 2021-01-29 17:07:53 +00:00
os-win32.c
qemu-bridge-helper.c
qemu-edid.c
qemu-img-cmds.hx
qemu-img.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
qemu-io-cmds.c
qemu-io.c
qemu-keymap.c
qemu-nbd.c qemu-nbd: Permit --shared=0 for unlimited clients 2021-02-12 07:42:08 -06:00
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx chardev: add nodelay option 2021-03-06 11:41:54 +01:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl
README.rst docs: move CODING_STYLE into the developer documentation 2021-02-24 11:05:21 +00:00
replication.c
replication.h
thunk.c
trace-events
VERSION
version.rc

===========
QEMU README
===========

QEMU is a generic and open source machine & userspace emulator and
virtualizer.

QEMU is capable of emulating a complete machine in software without any
need for hardware virtualization support. By using dynamic translation,
it achieves very good performance. QEMU can also integrate with the Xen
and KVM hypervisors to provide emulated hardware while allowing the
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
near native performance for CPUs. When QEMU emulates CPUs directly it is
capable of running operating systems made for one machine (e.g. an ARMv7
board) on a different machine (e.g. an x86_64 PC board).

QEMU is also capable of providing userspace API virtualization for Linux
and BSD kernel interfaces. This allows binaries compiled against one
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
different architecture ABI (e.g. the Linux x86_64 ABI). This does not
involve any hardware emulation, simply CPU and syscall emulation.

QEMU aims to fit into a variety of use cases. It can be invoked directly
by users wishing to have full control over its behaviour and settings.
It also aims to facilitate integration into higher level management
layers, by providing a stable command line interface and monitor API.
It is commonly invoked indirectly via the libvirt library when using
open source applications such as oVirt, OpenStack and virt-manager.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


Building
========

QEMU is multi-platform software intended to be buildable on all modern
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
of other UNIX targets. The simple steps to build QEMU are:


.. code-block:: shell

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

* `<https://qemu.org/Hosts/Linux>`_
* `<https://qemu.org/Hosts/Mac>`_
* `<https://qemu.org/Hosts/W32>`_


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

.. code-block:: shell

   git clone https://gitlab.com/qemu-project/qemu.git

When submitting patches, one common approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the
qemu-devel@nongnu.org mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the `style section
<https://www.qemu.org/docs/master/devel/style.html>` of
the Developers Guide.

Additional information on submitting patches can be found online via
the QEMU website

* `<https://qemu.org/Contribute/SubmitAPatch>`_
* `<https://qemu.org/Contribute/TrivialPatches>`_

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://gitlab.com/qemu-project/qemu-web.git

* `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_

A 'git-publish' utility was created to make above process less
cumbersome, and is highly recommended for making regular contributions,
or even just for sending consecutive patch series revisions. It also
requires a working 'git send-email' setup, and by default doesn't
automate everything, so you may want to go through the above steps
manually for once.

For installation instructions, please go to

*  `<https://github.com/stefanha/git-publish>`_

The workflow with 'git-publish' is:

.. code-block:: shell

  $ git checkout master -b my-feature
  $ # work on new commits, add your 'Signed-off-by' lines to each
  $ git publish

Your patch series will be sent and tagged as my-feature-v1 if you need to refer
back to it in the future.

Sending v2:

.. code-block:: shell

  $ git checkout my-feature # same topic branch
  $ # making changes to the commits (using 'git rebase', for example)
  $ git publish

Your patch series will be sent with 'v2' tag in the subject and the git tip
will be tagged as my-feature-v2.

Bug reporting
=============

The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://bugs.launchpad.net/qemu/>`_

If using QEMU via an operating system vendor pre-built binary package, it
is preferable to report bugs to the vendor's own bug tracker first. If
the bug is also known to affect latest upstream code, it can also be
reported via launchpad.

For additional information on bug reporting consult:

* `<https://qemu.org/Contribute/ReportABug>`_


ChangeLog
=========

For version history and release notes, please visit
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for
more detailed information.


Contact
=======

The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

* `<mailto:qemu-devel@nongnu.org>`_
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_
* #qemu on irc.oftc.net

Information on additional methods of contacting the community can be
found online via the QEMU website:

* `<https://qemu.org/Contribute/StartHere>`_