QEMU With E2K User Support
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Richard Henderson df722e33d5 bsd-user: arm (32-bit) support
This series of patches brings in 32-bit arm support for bsd-user.  It implements
 all the bits needed to do image activation, signal handling, stack management
 and threading. This allows us to get to the "Hello World" level. The arm and x86
 code are now the same as in the bsd-user fork. For full context, the fork is at
 https://github.com/qemu-bsd-user/qemu-bsd-user/tree/blitz (though the the recent
 sig{bus,segv} needed updates are incomplete).
 
 v5 changes:
    o Moved to using the CPUArchState typedef and move
      set_sigtramp_args, get_mcontext, set_mcontext, and
      get_ucontext_sigreturn prototypes to
      bsd-user/freebsd/target_os_ucontext.h
    o Fix issues with arm's set_mcontext related to masking
      and remove an unnecessary check.
 
 We're down to only one hunk needing review:
     bsd-user/arm/target_arch_signal.c: arm set_mcontext
 
 Warnings that should be ignored:
    o make checkpatch has a couple of complaints about the comments for the
      signal trampoline, since it's a false positive IMHO.
 WARNING: Block comments use a leading /* on a separate line
 +    /* 8 */ sys_sigreturn,
 WARNING: Block comments use a leading /* on a separate line
 +    /* 9 */ sys_exit
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 Comment: GPGTools - https://gpgtools.org
 
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 EQDXyQ//cT3b2zUQobby/vJX017mFni8ozZgwWSFlAvVFGjWt8UMdAt4rUFzr7a3
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Merge tag 'bsd-user-arm-pull-request' of gitlab.com:bsdimp/qemu into staging

bsd-user: arm (32-bit) support

This series of patches brings in 32-bit arm support for bsd-user.  It implements
all the bits needed to do image activation, signal handling, stack management
and threading. This allows us to get to the "Hello World" level. The arm and x86
code are now the same as in the bsd-user fork. For full context, the fork is at
https://github.com/qemu-bsd-user/qemu-bsd-user/tree/blitz (though the the recent
sig{bus,segv} needed updates are incomplete).

v5 changes:
   o Moved to using the CPUArchState typedef and move
     set_sigtramp_args, get_mcontext, set_mcontext, and
     get_ucontext_sigreturn prototypes to
     bsd-user/freebsd/target_os_ucontext.h
   o Fix issues with arm's set_mcontext related to masking
     and remove an unnecessary check.

We're down to only one hunk needing review:
    bsd-user/arm/target_arch_signal.c: arm set_mcontext

Warnings that should be ignored:
   o make checkpatch has a couple of complaints about the comments for the
     signal trampoline, since it's a false positive IMHO.
WARNING: Block comments use a leading /* on a separate line
+    /* 8 */ sys_sigreturn,
WARNING: Block comments use a leading /* on a separate line
+    /* 9 */ sys_exit

# gpg: Signature made Fri 07 Jan 2022 11:36:37 PM PST
# gpg:                using RSA key 2035F894B00AA3CF7CCDE1B76C1CD1287DB01100
# gpg: Good signature from "Warner Losh <wlosh@netflix.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@bsdimp.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@freebsd.org>" [unknown]
# gpg:                 aka "Warner Losh <imp@village.org>" [unknown]
# gpg:                 aka "Warner Losh <wlosh@bsdimp.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2035 F894 B00A A3CF 7CCD  E1B7 6C1C D128 7DB0 1100

* tag 'bsd-user-arm-pull-request' of gitlab.com:bsdimp/qemu: (37 commits)
  bsd-user: add arm target build
  bsd-user/freebsd/target_os_ucontext.h: Require TARGET_*CONTEXT_SIZE
  bsd-user/arm/signal.c: arm get_ucontext_sigreturn
  bsd-user/arm/signal.c: arm set_mcontext
  bsd-user/arm/signal.c: arm get_mcontext
  bsd-user/arm/signal.c: arm set_sigtramp_args
  bsd-user/arm/target_arch_signal.h: Define size of *context_t
  bsd-user/arm/target_arch_signal.h: arm machine context and trapframe for signals
  bsd-user/arm/target_arch_signal.h: arm specific signal registers and stack
  bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl
  bsd-user/arm/target_arch_elf.h: arm get hwcap
  bsd-user/arm/target_arch_elf.h: arm defines for ELF
  bsd-user/arm/target_arch_thread.h: Routines to create and switch to a thread
  bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm
  bsd-user/arm/target_arch_vmparam.h: Parameters for arm address space
  bsd-user/arm/target_arch_reg.h: Implement core dump register copying
  bsd-user/arm/target_arch_cpu.h: Implement system call dispatch
  bsd-user/arm/target_arch_cpu.h: Implement data abort exceptions
  bsd-user/arm/target_arch_cpu.h: Implement trivial EXCP exceptions
  bsd-user/arm/target_arch_cpu.h: Dummy target_cpu_loop implementation
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-08 09:37:59 -08:00
.github/workflows .github: move repo lockdown to the v2 configuration 2021-10-12 08:38:10 +01:00
.gitlab/issue_templates GitLab: Add "Feature Request" issue template. 2021-06-25 10:08:37 +01:00
.gitlab-ci.d gitlab-ci: Enable docs in the centos job 2022-01-05 11:10:13 +01:00
accel exec/memop: Adding signedness to quad definitions 2022-01-08 15:46:10 +10:00
audio audio: add "dbus" audio backend 2021-12-21 10:50:22 +04:00
authz configure, meson: convert pam detection to meson 2021-06-25 10:54:10 +02:00
backends docs: move D-Bus VMState documentation to source XML 2021-12-21 10:50:21 +04:00
block blockjob: drop BlockJob.blk field 2021-12-28 15:18:59 +01:00
bsd-user bsd-user/freebsd/target_os_ucontext.h: Require TARGET_*CONTEXT_SIZE 2022-01-07 22:58:51 -07:00
capstone@f8b1b83301
chardev chardev/char-socket: tcp_chr_sync_read: don't clobber errno 2022-01-07 05:19:55 -05:00
common-user common-user: Really fix i386 calls to safe_syscall_set_errno_tail 2022-01-04 21:14:23 -08:00
configs bsd-user: add arm target build 2022-01-07 22:58:51 -07:00
contrib plugins/cache: make L2 emulation optional through args 2021-11-04 10:32:01 +00:00
crypto crypto: add gnutls pbkdf provider 2021-07-14 14:15:52 +01:00
disas target/riscv: setup everything for rv64 to support rv128 execution 2022-01-08 15:46:10 +10:00
docs docs: reSTify virtio-balloon-stats documentation and move to docs/interop 2022-01-07 19:30:13 -05:00
dtc@b6910bec11 dtc: Update to version 1.6.1 2021-10-14 08:08:11 +02:00
dump dump: Remove is_zero_page() 2021-12-15 10:31:42 +01:00
ebpf ebpf: only include in system emulators 2021-09-17 16:07:52 +08:00
fpu softfloat: Add float64r32 arithmetic routines 2021-12-17 17:57:15 +01:00
fsdev 9pfs: make V9fsPath usable via P9Array API 2021-10-27 14:45:22 +02:00
gdb-xml target/arm: Advertise MVE to gdb when present 2021-11-02 14:14:55 -04:00
hw hw/riscv: Use error_fatal for SoC realisation 2022-01-08 15:46:09 +10:00
include target/riscv: setup everything for rv64 to support rv128 execution 2022-01-08 15:46:10 +10:00
io build-sys: add HAVE_IPPROTO_MPTCP 2021-09-30 15:30:25 +02:00
libdecnumber libdecnumber: Introduce decNumberIntegralToInt128 2021-11-09 10:32:52 +11:00
linux-headers linux-headers: update to 5.16-rc1 2021-12-10 09:47:18 +01:00
linux-user linux-user: netlink: update IFLA_BRPORT entries 2022-01-06 11:40:53 +01:00
meson@12f9f04ba0 meson: bump submodule to 0.59.3 2021-11-02 15:57:28 +01:00
migration failover: Silence warning messages during qtest 2021-12-22 08:12:45 +01:00
monitor ui/dbus: add p2p=on/off option 2021-12-21 10:50:22 +04:00
nbd nbd/client-connection: improve error message of cancelled attempt 2021-12-21 14:52:19 +01:00
net vdpa: Add dummy receive callback 2021-11-28 17:03:52 -05:00
pc-bios roms/opensbi: Upgrade from v0.9 to v1.0 2022-01-08 15:46:09 +10:00
plugins plugins/meson.build: fix linker issue with weird paths 2021-11-29 15:13:07 +00:00
po po: update turkish translation 2021-10-22 18:07:30 +02:00
python python/aqmp: fix send_fd_scm for python 3.6.x 2021-11-22 18:41:21 -05:00
qapi hw/smbios: Use qapi for SmbiosEntryPointType 2022-01-07 05:19:55 -05:00
qga qapi: Add spaces after symbol declaration for consistency 2021-10-02 07:33:41 +02:00
qobject qobject: braces {} are necessary for all arms of this statement 2021-02-04 13:20:29 +01:00
qom monitor: Fix find_device_state() for IDs containing slashes 2021-11-10 06:14:51 +01:00
replay replay: notify CPU on event 2021-04-01 10:37:20 +02:00
roms roms/opensbi: Upgrade from v0.9 to v1.0 2022-01-08 15:46:09 +10:00
scripts qemu-binfmt-conf.sh: fix -F option 2022-01-06 11:40:40 +01:00
scsi error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
semihosting target/riscv: Replace riscv_cpu_is_32bit with riscv_cpu_mxl 2021-10-22 07:47:51 +10:00
slirp@a88d9ace23 Update libslirp to v4.6.1 2021-08-03 16:07:22 +04:00
softmmu util/oslib-posix: Forward SIGBUS to MCE handler under Linux 2022-01-07 19:30:13 -05:00
storage-daemon qapi: Generalize command policy checking 2021-10-29 18:24:46 +02:00
stubs chardev: don't exit() straight away on C-a x 2021-11-04 10:32:01 +00:00
subprojects/libvhost-user libvhost-user: fix VHOST_USER_REM_MEM_REG skipping mmap_addr 2021-10-20 04:37:55 -04:00
target target/riscv: Implement the stval/mtval illegal instruction 2022-01-08 15:46:10 +10:00
tcg exec/memop: Adding signedness to quad definitions 2022-01-08 15:46:10 +10:00
tests tests: acpi: Add updated TPM related tables 2022-01-07 19:30:13 -05:00
tools virtiofsd: Error on bad socket group name 2021-10-25 19:38:32 +01:00
trace trace: move configuration from configure to Meson 2021-10-14 09:50:56 +02:00
ui ui/dbus: register D-Bus VC handler 2021-12-21 10:50:22 +04:00
util qemu/int128: addition of div/rem 128-bit operations 2022-01-08 15:46:10 +10:00
.cirrus.yml cirrus: delete FreeBSD and macOS jobs 2021-07-14 14:33:53 +01:00
.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 gitignore: Update with some filetypes 2021-07-23 17:22:15 +01:00
.gitlab-ci.yml docs: Document GitLab custom CI/CD variables 2021-07-29 07:56:01 +02:00
.gitmodules gitmodules: use GitLab repos instead of qemu.org 2021-02-09 20:53:56 +00:00
.gitpublish
.mailmap MAINTAINERS: Change philmd's email address 2021-12-31 13:42:54 +01:00
.patchew.yml scripts/checkpatch: roll diff tweaking into checkpatch itself 2021-06-25 10:08:33 +01:00
.readthedocs.yml readthedocs: build with Python 3.6 2020-10-05 16:30:45 +01:00
.travis.yml travis.yml: Remove the "Release tarball" job 2021-10-12 08:37:05 +01:00
block.c block: Let replace_child_noperm free children 2021-11-16 09:43:46 +01:00
blockdev-nbd.c block/nbd: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:29:47 +01:00
blockdev.c blockjob: implement and use block_job_get_aio_context 2021-12-28 15:18:23 +01:00
blockjob.c blockjob: drop BlockJob.blk field 2021-12-28 15:18:59 +01:00
configure tests/tcg: Use $cpu in configure.sh 2021-12-30 21:37:35 -08:00
COPYING
COPYING.LIB
cpu.c linux-user: Add code for PR_GET/SET_UNALIGN 2022-01-06 11:40:52 +01:00
cpus-common.c overall/alpha tcg cpus|hppa: Fix Lesser GPL version number 2020-11-15 16:43:54 +01:00
disas.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
gdbstub.c gdbstub, kvm: let KVM report supported singlestep flags 2021-12-10 09:47:18 +01:00
gitdm.config contrib/gitdm: add a new interns group-map for GSoC/Outreachy work 2021-07-23 17:22:16 +01:00
hmp-commands-info.hx qapi: introduce x-query-irq QMP command 2021-11-02 15:57:12 +00:00
hmp-commands.hx hmp: Add shortcut to stop command to match cont 2021-11-09 10:11:27 +01:00
iothread.c iothread: use IOThreadParamInfo in iothread_[set|get]_param() 2021-10-07 15:29:50 +01:00
job-qmp.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
job.c job.c: add missing notifier initialization 2021-12-28 15:16:31 +01:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
Kconfig.host kconfig: split CONFIG_SPARSE_MEM from fuzzing 2021-10-14 09:50:56 +02:00
LICENSE
MAINTAINERS docs: reSTify virtio-balloon-stats documentation and move to docs/interop 2022-01-07 19:30:13 -05:00
Makefile build: use "meson test" as the test harness 2021-12-23 10:06:19 +01:00
memory_ldst.c.inc exec/memory_ldst: Use correct type sizes 2021-05-26 08:35:51 -07:00
meson_options.txt ui: add a D-Bus display backend 2021-12-21 10:50:22 +04:00
meson.build bsd-user: create a per-arch signal.c file 2022-01-07 22:58:51 -07:00
module-common.c
os-posix.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
os-win32.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
page-vary-common.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
page-vary.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
qemu-bridge-helper.c
qemu-edid.c qemu-edid: use qemu_edid_size() 2021-05-10 11:41:02 +02:00
qemu-img-cmds.hx qemu-img: Consistent docs for convert -F 2021-11-02 12:47:51 +01:00
qemu-img.c blockjob: implement and use block_job_get_aio_context 2021-12-28 15:18:23 +01:00
qemu-io-cmds.c block: Acquire AioContexts during bdrv_reopen_multiple() 2021-07-09 13:19:11 +02:00
qemu-io.c error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
qemu-keymap.c qemu-keymap: Add license in generated files 2021-12-17 10:41:50 +01:00
qemu-nbd.c nbd/server: Add --selinux-label option 2021-11-16 10:16:38 -06:00
qemu-options.hx qemu-options: Remove the deprecated -no-quit option 2022-01-05 11:10:13 +01:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl sasl: remove comment about obsolete kerberos versions 2021-06-14 13:28:50 +01:00
README.rst README: Fix some documentation URLs 2021-10-23 20:28:12 +02:00
replication.c replication: move include out of root directory 2021-05-26 14:49:46 +02:00
trace-events trace: Split guest_mem_before 2021-10-05 16:53:17 -07:00
VERSION Open 6.3 development tree 2021-12-14 12:40:12 -08:00
version.rc configure: remove CONFIG_FILEVERSION and CONFIG_PRODUCTVERSION 2021-01-02 21:03:37 +01:00

===========
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.


Documentation
=============

Documentation can be found hosted online at
`<https://www.qemu.org/documentation/>`_. The documentation for the
current development version that is available at
`<https://www.qemu.org/docs/master/>`_ is generated from the ``docs/``
folder in the source tree, and is built by `Sphinx
<https://www.sphinx-doc.org/en/master/>_`.


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://wiki.qemu.org/Hosts/Linux>`_
* `<https://wiki.qemu.org/Hosts/Mac>`_
* `<https://wiki.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://wiki.qemu.org/Contribute/SubmitAPatch>`_
* `<https://wiki.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 GitLab issues to track bugs. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://gitlab.com/qemu-project/qemu/-/issues>`_

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 GitLab.

For additional information on bug reporting consult:

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