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Greg Kurz 040bdafce1 spapr: Adjust firmware path of PCI devices
It is currently not possible to perform a strict boot from USB storage:

$ qemu-system-ppc64 -accel kvm -nodefaults -nographic -serial stdio \
	-boot strict=on \
	-device qemu-xhci \
	-device usb-storage,drive=disk,bootindex=0 \
	-blockdev driver=file,node-name=disk,filename=fedora-ppc64le.qcow2

SLOF **********************************************************************
QEMU Starting
 Build Date = Jul 17 2020 11:15:24
 FW Version = git-e18ddad8516ff2cf
 Press "s" to enter Open Firmware.

Populating /vdevice methods
Populating /vdevice/vty@71000000
Populating /vdevice/nvram@71000001
Populating /pci@800000020000000
                     00 0000 (D) : 1b36 000d    serial bus [ usb-xhci ]
No NVRAM common partition, re-initializing...
Scanning USB
  XHCI: Initializing
    USB Storage
       SCSI: Looking for devices
          101000000000000 DISK     : "QEMU     QEMU HARDDISK    2.5+"
Using default console: /vdevice/vty@71000000

  Welcome to Open Firmware

  Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
  This program and the accompanying materials are made available
  under the terms of the BSD License available at
  http://www.opensource.org/licenses/bsd-license.php

Trying to load:  from: /pci@800000020000000/usb@0/storage@1/disk@101000000000000 ...
E3405: No such device

E3407: Load failed

  Type 'boot' and press return to continue booting the system.
  Type 'reset-all' and press return to reboot the system.

Ready!
0 >

The device tree handed over by QEMU to SLOF indeed contains:

qemu,boot-list =
	"/pci@800000020000000/usb@0/storage@1/disk@101000000000000 HALT";

but the device node is named usb-xhci@0, not usb@0.

This happens because the firmware names of PCI devices returned
by get_boot_devices_list() come from pcibus_get_fw_dev_path(),
while the sPAPR PHB code uses a different naming scheme for
device nodes. This inconsistency has always been there but it was
hidden for a long time because SLOF used to rename USB device
nodes, until this commit, merged in QEMU 4.2.0 :

commit 85164ad4ed
Author: Alexey Kardashevskiy <aik@ozlabs.ru>
Date:   Wed Sep 11 16:24:32 2019 +1000

    pseries: Update SLOF firmware image

    This fixes USB host bus adapter name in the device tree to match QEMU's
    one.

    Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
    Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Fortunately, sPAPR implements the firmware path provider interface.
This provides a way to override the default firmware paths.

Just factor out the sPAPR PHB naming logic from spapr_dt_pci_device()
to a helper, and use it in the sPAPR firmware path provider hook.

Fixes: 85164ad4ed ("pseries: Update SLOF firmware image")
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20210122170157.246374-1-groug@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2021-02-10 10:43:50 +11:00
.github .github: Enable repo-lockdown bot to refuse GitHub pull requests 2020-04-07 16:19:18 +01:00
.gitlab-ci.d gitlab-ci: Add alpine to pipeline 2021-01-20 10:46:54 +01:00
accel replay: fix replay of the interrupts 2021-02-08 14:43:55 +01:00
audio audio: space prohibited between function name and parenthesis'(' 2021-01-15 11:49:26 +01:00
authz authz-simple: Check that 'identity' property is set 2020-11-18 10:51:35 +00:00
backends replay: rng-builtin support 2021-02-08 15:15:32 +01:00
block block: rename and alter bdrv_all_find_snapshot semantics 2021-02-08 11:19:51 +00:00
bsd-user accel: replace struct CpusAccel with AccelOpsClass 2021-02-05 10:24:15 -10:00
capstone@f8b1b83301 capstone: Update to upstream "next" branch 2020-10-03 04:23:14 -05:00
chardev chardev: check if the chardev is registered for yanking 2021-02-04 15:58:54 +01:00
contrib vhost-user-gpu: handle display-info in a callback 2021-02-04 15:58:54 +01:00
crypto crypto: Add spaces around operator 2021-01-29 17:07:53 +00:00
default-configs Testing, gdbstub and semihosting patches: 2021-01-18 12:10:20 +00:00
disas build-system: clean up TCG/TCI configury 2021-01-21 13:00:41 +01:00
docs * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
dtc@85e5d83984 Makefile: dtc: update, build the libfdt target 2020-06-16 14:49:05 +01:00
dump qapi: More complex uses of QAPI_LIST_APPEND 2021-01-28 08:08:45 +01:00
fpu softfloat: Define misc operations for bfloat16 2020-08-28 10:48:07 -07:00
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 spapr: Adjust firmware path of PCI devices 2021-02-10 10:43:50 +11:00
include spapr: Adjust firmware path of PCI devices 2021-02-10 10:43:50 +11:00
io Yank patches patches for 2021-01-13 2021-01-13 14:19:24 +00:00
libdecnumber qemu/: fix some comment spelling errors 2020-09-17 20:35:43 +02:00
linux-headers Update linux headers to 5.11-rc2 2021-01-21 11:19:45 +01:00
linux-user accel: replace struct CpusAccel with AccelOpsClass 2021-02-05 10:24:15 -10:00
meson@776acd2a80 submodules: bump meson to 0.55.3 2020-10-17 10:45:42 -04:00
migration migration: only check page size match if RAM postcopy is enabled 2021-02-08 11:19:52 +00:00
monitor migration: introduce a delete_snapshot wrapper 2021-02-08 11:19:51 +00:00
nbd nbd/server: Quiesce coroutines on context switch 2021-01-20 14:48:54 -06:00
net Trivial patches 20210129 2021-01-29 10:10:43 +00:00
pc-bios pc-bios/descriptors: fix paths in json files 2021-02-08 14:43:55 +01:00
plugins cfi: Initial support for cfi-icall in QEMU 2021-01-02 21:03:35 +01:00
po configure: move gettext detection to meson.build 2021-01-02 21:03:09 +01:00
python python: add __repr__ to ConsoleSocket to aid debugging 2021-01-02 21:03:09 +01:00
qapi * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
qga qapi: More complex uses of QAPI_LIST_APPEND 2021-01-28 08:08:45 +01:00
qobject qobject: braces {} are necessary for all arms of this statement 2021-02-04 13:20:29 +01:00
qom qom: Allow optional sugar props 2021-02-08 16:57:37 +11:00
replay migration: wire up support for snapshot device selection 2021-02-08 11:19:51 +00:00
roms qboot: update to latest upstream 2020-11-20 10:48:53 -05:00
scripts * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
scsi qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
slirp@8f43a99191 slirp: update to fix CVE-2020-29129 CVE-2020-29130 2020-11-27 20:57:11 +04:00
softmmu * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
storage-daemon block: move blk_exp_close_all() to qemu_cleanup() 2021-02-02 13:23:47 +01:00
stubs qapi/meson: Restrict qdev code to system-mode emulation 2021-02-08 14:43:55 +01:00
subprojects/libvhost-user build-sys: add libvhost-user missing dependencies 2021-01-23 09:26:41 -05:00
target target/i386: Expose VMX entry/exit load pkrs control bits 2021-02-08 15:15:32 +01:00
tcg tcg/tci: Remove TCG_CONST 2021-02-05 10:24:14 -10:00
tests * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
tools virtiofsd: Add restart_syscall to the seccomp whitelist 2021-02-04 17:50:08 +00:00
trace trace: add meson custom_target() depend_files for tracetool 2021-02-01 10:50:55 +00:00
ui display/ui: add a callback to indicate GL state is flushed 2021-02-04 15:58:54 +01:00
util * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
.cirrus.yml cirrus/msys2: Cache msys2 mingw in a better way. 2021-01-12 12:38:03 +01:00
.dir-locals.el
.editorconfig meson: rename included C source files to .c.inc 2020-08-21 06:18:30 -04:00
.exrc
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 2017-06-07 14:38:45 +01:00
.gitattributes buildsys: Help git-diff adding .gitattributes config file 2020-11-18 09:33:16 +01:00
.gitignore Makefile: add GNU global tags support 2021-01-18 10:04:31 +00:00
.gitlab-ci.yml gitlab-ci.yml: Avoid recompiling the sources in the test jobs 2021-01-27 04:47:40 +01:00
.gitmodules gitmodules: add qemu.org vbootrom submodule 2020-09-23 13:44:59 +01:00
.gitpublish Add a git-publish configuration file 2018-03-05 09:03:17 +00:00
.mailmap MAINTAINERS: chenhc@lemote.com -> chenhuacai@kernel.org 2020-12-13 16:00:58 +01:00
.patchew.yml ci: store Patchew configuration in the tree 2019-06-03 14:03:02 +02:00
.readthedocs.yml readthedocs: build with Python 3.6 2020-10-05 16:30:45 +01:00
.shippable.yml shippable.yml: Remove jobs duplicated on Gitlab-CI 2021-01-18 10:04:31 +00:00
.travis.yml gitlab: migrate the minimal tools and unit tests from Travis 2021-01-18 10:04:31 +00:00
block.c block: move blk_exp_close_all() to qemu_cleanup() 2021-02-02 13:23:47 +01:00
blockdev-nbd.c nbd: Update qapi to support exporting multiple bitmaps 2020-10-30 15:10:15 -05:00
blockdev.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
blockjob.c blockjob: add set_speed to BlockJobDriver 2021-01-26 14:36:37 +01:00
CODING_STYLE.rst CODING_STYLE.rst: Be less strict about 80 character limit 2020-12-13 17:51:33 +01:00
configure * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
COPYING
COPYING.LIB COPYING.LIB: Synchronize the LGPL 2.1 with the version from gnu.org 2019-01-30 11:01:22 +01:00
cpu.c accel/tcg: split TCG-only code from cpu_exec_realizefn 2021-02-05 10:24:14 -10:00
cpus-common.c overall/alpha tcg cpus|hppa: Fix Lesser GPL version number 2020-11-15 16:43:54 +01:00
disas.c disas: Push const down through host disassembly 2021-01-07 05:09:42 -10:00
exec-vary.c nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
gdbstub.c gdbstub: Fix handle_query_xfer_auxv 2021-02-08 10:55:15 +00:00
gitdm.config contrib: gitdm: add a mapping for Janus Technologies 2019-03-12 19:31:29 +00:00
hmp-commands-info.hx replay: introduce info hmp/qmp command 2020-10-06 08:34:49 +02:00
hmp-commands.hx hmp: remove "change vnc TARGET" command 2021-01-23 15:55:07 -05:00
iothread.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
job-qmp.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
job.c job: call job_enter from job_pause 2021-01-26 14:36:37 +01:00
Kconfig Makefile: simplify MINIKCONF rules 2020-07-10 18:02:21 -04:00
Kconfig.host configure: Fix build dependencies with vhost-vdpa. 2020-09-29 02:15:24 -04:00
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 2019-11-11 15:11:21 +01:00
MAINTAINERS * Fuzzing improvements (Qiuhao, Alexander) 2021-02-09 10:04:51 +00:00
Makefile tests/docker: alias docker-help target for consistency 2021-02-08 09:41:00 +00:00
memory_ldst.c.inc fuzz: ignore address_space_map is_write flag 2021-02-08 14:43:54 +01:00
meson_options.txt configure: Improve TCI feature description 2021-02-08 14:43:55 +01:00
meson.build meson: Restrict emulation code 2021-02-08 14:43:55 +01:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
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 vl: relocate paths to data directories 2020-09-30 19:11:36 +02:00
qemu-bridge-helper.c qemu-bridge-helper: relocate path to default ACL 2020-09-30 19:11:36 +02:00
qemu-edid.c qemu-edid: drop cast 2020-10-14 06:05:56 +02:00
qemu-img-cmds.hx qemu-img: add support for rate limit in qemu-img convert 2020-10-27 15:26:20 +01:00
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: add preallocate mode parameter for truncate command 2020-12-18 12:35:55 +01:00
qemu-io.c trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
qemu-keymap.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-nbd.c block: move blk_exp_close_all() to qemu_cleanup() 2021-02-02 13:23:47 +01:00
qemu-options-wrapper.h qemu-img: remove references to GEN_DOCS 2018-05-20 08:35:54 +03:00
qemu-options.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
qemu-options.hx machine: add missing doc for memory-backend option 2021-02-08 14:43:54 +01:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl Default to GSSAPI (Kerberos) instead of DIGEST-MD5 for SASL 2017-05-09 14:41:47 +01:00
README.rst CHANGELOG: remove disused file 2020-10-27 16:48:50 +01:00
replication.c replication: Introduce new APIs to do replication operation 2016-09-13 11:00:56 +01:00
replication.h Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
thunk.c overall usermode...: Fix Lesser GPL version number 2020-11-15 16:43:40 +01:00
trace-events trace-events: Fix attribution of trace points to source 2020-09-09 17:17:58 +01:00
VERSION Open 6.0 development tree 2020-12-08 21:04:57 +00:00
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.


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://git.qemu.org/git/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 CODING_STYLE.rst file.

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://git.qemu.org/git/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>`_