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Peter Maydell 44d7ce0ef3 cputlb: Don't assume do_unassigned_access() never returns
In get_page_addr_code(), if the guest PC doesn't correspond to RAM
then we currently run the CPU's do_unassigned_access() hook if it has
one, and otherwise we give up and exit QEMU with a more-or-less
useful message.  This code assumes that the do_unassigned_access hook
will never return, because if it does then we'll plough on attempting
to use a non-RAM TLB entry to get a RAM address and will abort() in
qemu_ram_addr_from_host_nofail().  Unfortunately some CPU
implementations of this hook do return: Microblaze, SPARC and the ARM
v7M.

Change the code to call report_bad_exec() if the hook returns, as
well as if it didn't have one.  This means we can tidy it up to use
the cpu_unassigned_access() function which wraps the "get the CPU
class and call the hook if it has one" work, since we aren't trying
to distinguish "no hook" from "hook existed and returned" any more.

This brings the handling of this hook into line with the handling
used for data accesses, where "hook returned" is treated the
same as "no hook existed" and gets you the default behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2017-02-28 12:08:15 +00:00
audio trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
backends Add wctablet device 2017-02-20 11:26:28 +01:00
block iscsi: do not use aio_context_acquire/release 2017-02-27 13:58:58 +00:00
bsd-user translate-all: add DEBUG_LOCKING asserts 2016-10-31 10:24:45 +01:00
chardev Add wctablet device 2017-02-20 11:26:28 +01:00
contrib contrib: add libvhost-user 2016-12-16 01:14:38 +02:00
crypto crypto: assert cipher algorithm is always valid 2017-02-27 13:37:14 +00:00
default-configs hw/mips: MIPS Boston board support 2017-02-24 10:37:21 +00:00
disas disas/ppc: Fix indefinite articles in comments 2017-01-31 10:10:12 +11:00
docs docs: new design document multi-thread-tcg.txt 2017-02-24 10:32:45 +00:00
dtc@ec02b34c05 dtc: Update requirement to v1.4.2 2017-02-21 22:24:58 +00:00
fpu softfloat: Add float128_to_uint32_round_to_zero() 2017-02-22 11:28:28 +11:00
fsdev 9pfs: add cleanup operation in FileOperations 2016-11-23 13:53:34 +01:00
gdb-xml target-ppc: gdbstub: Add VSX support 2016-01-30 23:37:38 +11:00
hw hw/arm/virt: fix cpu object reference leak 2017-02-28 12:08:15 +00:00
include target-arm: Implement BCM2835 hardware RNG 2017-02-28 12:08:13 +00:00
io io: make qio_channel_yield aware of AioContexts 2017-02-21 11:14:07 +00:00
libdecnumber libdecnumber: Clean up includes 2016-02-16 14:29:27 +00:00
linux-headers vhost: drop VHOST_F_DEVICE_IOTLB 2017-01-18 22:59:54 +02:00
linux-user target-ppc, tcg: fix usermode segfault with pthread_create() 2017-02-22 11:28:28 +11:00
migration migration: Add VMSTATE_WITH_TMP 2017-02-13 17:27:14 +00:00
nbd nbd: convert to use qio_channel_yield 2017-02-21 11:14:08 +00:00
net net: Flatten simple union NetLegacyOptions 2017-02-22 19:50:52 +01:00
pc-bios Update OpenBIOS images to ef8a14e built from submodule. 2016-11-24 21:26:00 +00:00
pixman@87eea99e44 pixman: update internal copy to pixman-0.32.6 2014-09-15 08:14:19 +02:00
po po: add missing translations in de, fr, it, zh 2016-12-14 18:47:19 +00:00
qapi option cutils: Fix and clean up number conversions 2017-02-24 18:34:27 +00:00
qga qga: fix erroneous argument to strerror 2017-01-24 23:26:53 +03:00
qobject option cutils: Fix and clean up number conversions 2017-02-24 18:34:27 +00:00
qom tcg: drop global lock during TCG code execution 2017-02-24 10:32:45 +00:00
replay char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
roms Update OpenBIOS images to ef8a14e built from submodule. 2016-11-24 21:26:00 +00:00
scripts qapi2texi: replace quotation by bold section name 2017-02-20 14:10:46 +01:00
slirp slirp: tcp_listen(): Don't try to close() an fd we never opened 2017-02-26 15:39:29 +01:00
stubs block: move AioContext, QEMUTimer, main-loop to libqemuutil 2017-02-21 11:14:07 +00:00
target Add missing fp_access_check() to aarch64 crypto instructions 2017-02-28 12:08:15 +00:00
tcg tcg: enable MTTCG by default for ARM on x86 hosts 2017-02-24 10:32:46 +00:00
tests tests-aio-multithread: use atomic_read properly 2017-02-27 14:00:53 +00:00
trace trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
ui vnc: fix double free issues 2017-02-27 16:22:01 +01:00
util option: Fix checking of sizes for overflow and trailing crap 2017-02-23 20:35:36 +01:00
.dir-locals.el Add .dir-locals.el file to configure emacs coding style 2015-10-08 19:46:01 +03:00
.exrc qemu: add .exrc 2012-09-07 09:02:44 +03:00
.gitignore Makefile: Put VERSION info into version.texi rather than using -D 2017-02-20 14:11:07 +01:00
.gitmodules ppc: add skiboot firmware for the pnv platform 2016-10-28 09:36:58 +11:00
.mailmap Update mailmap 2013-09-05 09:40:31 -05:00
.shippable.yml .shippable.yml: new CI provider 2017-02-24 14:18:11 +08:00
.travis.yml .travis.yml: split VM based builds 2017-02-10 13:19:56 +00:00
CODING_STYLE CODING_STYLE: Fix a typo ("have" vs. "has") 2016-10-08 11:25:29 +03:00
COPYING
COPYING.LIB
Changelog Use qemu-project.org domain name 2013-10-11 09:34:56 -07:00
HACKING HACKING: document #include order 2017-01-03 16:38:47 +00:00
LICENSE vfio: move hw/misc/vfio.c to hw/vfio/pci.c Move vfio.h into include/hw/vfio 2014-12-19 15:24:06 -07:00
MAINTAINERS MAINTAINERS: merge Build and test automation with Docker tests 2017-02-24 14:18:11 +08:00
Makefile Makefile: Put VERSION info into version.texi rather than using -D 2017-02-20 14:11:07 +01:00
Makefile.objs block: move AioContext, QEMUTimer, main-loop to libqemuutil 2017-02-21 11:14:07 +00:00
Makefile.target -----BEGIN PGP SIGNATURE----- 2017-02-02 16:08:28 +00:00
README README: Add linux to macOS build info 2017-01-24 23:26:52 +03:00
VERSION Open 2.9 development tree 2016-12-20 16:20:16 +00:00
accel.c clean-up: removed duplicate #includes 2016-10-28 18:17:24 +03:00
arch_init.c nios2: Add support for Nios-II R1 2017-01-24 13:10:36 -08:00
atomic_template.h tcg: Add atomic128 helpers 2016-10-26 08:29:01 -07:00
balloon.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
block.c Block layer patches 2017-02-26 12:26:37 +00:00
blockdev-nbd.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
blockdev.c blockdev: Use BlockBackend to resize in qmp_block_resize() 2017-02-24 16:09:23 +01:00
blockjob.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
bootdevice.c error: Remove NULL checks on error_propagate() calls 2016-06-20 16:38:13 +02:00
bt-host.c all: Clean up includes 2016-02-04 17:41:30 +00:00
bt-vhci.c all: Clean up includes 2016-02-04 17:41:30 +00:00
configure MIPS patches 2017-02-24-2 2017-02-25 21:15:14 +00:00
cpu-exec-common.c tcg: remove global exit_request 2017-02-24 10:32:45 +00:00
cpu-exec.c tcg: handle EXCP_ATOMIC exception for system emulation 2017-02-24 10:32:45 +00:00
cpus-common.c *_run_on_cpu: introduce run_on_cpu_data type 2016-10-31 15:00:25 +01:00
cpus.c tcg: handle EXCP_ATOMIC exception for system emulation 2017-02-24 10:32:45 +00:00
cputlb.c cputlb: Don't assume do_unassigned_access() never returns 2017-02-28 12:08:15 +00:00
device-hotplug.c blockdev: Split monitor reference from BB creation 2016-03-17 15:47:56 +01:00
device_tree.c qemu-common: stop including qemu/bswap.h from qemu-common.h 2016-05-19 16:42:28 +02:00
disas.c Fix Thumb-1 BE32 execution and disassembly. 2017-02-07 18:29:59 +00:00
dma-helpers.c block: explicitly acquire aiocontext in bottom halves that need it 2017-02-21 11:39:39 +00:00
dump.c error: Remove NULL checks on error_propagate() calls 2016-06-20 16:38:13 +02:00
exec.c tcg: drop global lock during TCG code execution 2017-02-24 10:32:45 +00:00
gdbstub.c gdbstub: Fix vCont behaviour 2017-02-16 14:06:56 +01:00
hax-stub.c Plumb the HAXM-based hardware acceleration support 2017-01-19 22:07:46 +01:00
hmp-commands-info.hx memory: hmp: add "-f" for "info mtree" 2017-01-27 18:07:31 +01:00
hmp-commands.hx COLO: Add 'x-colo-lost-heartbeat' command to trigger failover 2016-10-30 15:17:39 +05:30
hmp.c util/cutils: Change qemu_strtosz*() from int64_t to uint64_t 2017-02-23 20:35:36 +01:00
hmp.h COLO: Add 'x-colo-lost-heartbeat' command to trigger failover 2016-10-30 15:17:39 +05:30
ioport.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
iothread.c monitor: add poll-* properties into query-iothreads result 2017-02-21 18:29:01 +00:00
kvm-all.c report guest crash information in GUEST_PANICKED event 2017-02-16 15:30:49 +01:00
kvm-stub.c kvm-all: Pass requester ID to MSI routing functions 2016-10-04 13:28:09 +01:00
memory.c tcg: drop global lock during TCG code execution 2017-02-24 10:32:45 +00:00
memory_ldst.inc.c exec: introduce memory_ldst.inc.c 2016-12-22 16:00:23 +01:00
memory_mapping.c memory: Replace skip_dump flag with "ram_device" 2016-10-31 09:53:03 -06:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
monitor.c option cutils: Fix and clean up number conversions 2017-02-24 18:34:27 +00:00
numa.c numa: Flatten simple union NumaOptions 2017-02-22 19:50:46 +01:00
os-posix.c use g_path_get_dirname instead of dirname 2016-07-17 09:59:21 +02:00
os-win32.c all: Clean up includes 2016-02-04 17:41:30 +00:00
page_cache.c coccinelle: Remove unnecessary variables for function return value 2016-06-20 16:38:13 +02:00
qapi-schema.json QAPI patches for 2017-02-22 2017-02-24 15:00:51 +00:00
qdev-monitor.c Introduce DEVICE_CATEGORY_CPU for CPU devices 2017-01-27 18:07:31 +01:00
qdict-test-data.txt
qemu-bridge-helper.c all: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
qemu-doc.texi nios2 target support 2017-01-25 13:30:23 +00:00
qemu-ga.texi qemu-ga: Remove stray 'q' in documentation 2016-10-28 18:17:23 +03:00
qemu-img-cmds.hx qemu-img: add skip option to dd 2016-09-20 22:10:57 +02:00
qemu-img.c util/cutils: Change qemu_strtosz*() from int64_t to uint64_t 2017-02-23 20:35:36 +01:00
qemu-img.texi qemu-img: add skip option to dd 2016-09-20 22:10:57 +02:00
qemu-io-cmds.c util/cutils: Change qemu_strtosz*() from int64_t to uint64_t 2017-02-23 20:35:36 +01:00
qemu-io.c qemu-io: Return non-zero exit code on failure 2017-02-12 00:47:42 +01:00
qemu-nbd.c qemu-nbd: Implement socket activation. 2017-02-16 15:30:45 +01:00
qemu-nbd.texi nbd: Add qemu-nbd -D for human-readable description 2016-11-02 09:28:55 +01:00
qemu-option-trace.texi docs: update manpage for stderr->log rename 2017-02-13 13:38:31 +00:00
qemu-options-wrapper.h hxtool: emit Texinfo headings as @subsection 2017-01-16 17:52:35 +01:00
qemu-options.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
qemu-options.hx tcg: add options for enabling MTTCG 2017-02-24 10:32:45 +00:00
qemu-seccomp.c seccomp: adding getrusage to the whitelist 2016-09-21 11:26:02 +02:00
qemu-tech.texi qemu-doc: merge qemu-tech and qemu-doc 2016-10-07 10:05:54 +02:00
qemu.nsi qemu-doc: merge qemu-tech and qemu-doc 2016-10-07 10:05:54 +02:00
qemu.sasl sasl: Avoid 'Could not find keytab file' in syslog 2014-03-15 13:54:18 +04:00
qmp.c char: headers clean-up 2017-01-31 23:31:22 +04:00
qtest.c util/cutils: Rename qemu_strtoll(), qemu_strtoull() 2017-02-23 20:35:35 +01:00
replication.c replication: Introduce new APIs to do replication operation 2016-09-13 11:00:56 +01:00
replication.h replication: Introduce new APIs to do replication operation 2016-09-13 11:00:56 +01:00
rules.mak rules: don't try to create missing include dirs 2017-02-07 11:52:34 +00:00
softmmu_template.h cputlb: Tidy some macros 2016-10-26 08:29:00 -07:00
spice-qemu-char.c -----BEGIN PGP SIGNATURE----- 2017-02-02 16:08:28 +00:00
tcg-runtime.c tcg: Add opcode for ctpop 2017-01-10 08:48:56 -08:00
tci.c tcg/tci: Add support for fence 2016-09-16 08:12:12 -07:00
thunk.c thunk: Rename args and fields in host-target bitmask conversion code 2016-06-07 18:19:24 +03:00
tpm.c qapi: Don't special-case simple union wrappers 2016-03-18 10:29:26 +01:00
trace-events block: move AioContext, QEMUTimer, main-loop to libqemuutil 2017-02-21 11:14:07 +00:00
translate-all.c tcg: enable tb_lock() for SoftMMU 2017-02-24 10:32:45 +00:00
translate-all.h trace: Add per-vCPU tracing states for events with the 'vcpu' property 2016-07-18 18:23:12 +01:00
translate-common.c tcg: drop global lock during TCG code execution 2017-02-24 10:32:45 +00:00
user-exec-stub.c stubs: group stubs for user-mode emulation 2017-01-16 17:52:35 +01:00
user-exec.c tcg: Merge GETPC and GETRA 2016-09-16 08:12:11 -07:00
version.rc Use qemu-project.org domain name 2013-10-11 09:34:56 -07:00
vl.c This is the MTTCG pull-request as posted yesterday. 2017-02-25 18:43:52 +00:00
xen-common-stub.c char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
xen-common.c char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
xen-hvm-stub.c fix MSI injection on Xen 2016-02-06 20:44:10 +02:00
xen-hvm.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
xen-mapcache.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00

README

         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:

  mkdir build
  cd build
  ../configure
  make

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

  http://qemu-project.org/Hosts/Linux
  http://qemu-project.org/Hosts/Mac
  http://qemu-project.org/Hosts/W32


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

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

   git clone git://git.qemu-project.org/qemu.git

When submitting patches, the preferred 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 HACKING and CODING_STYLE files.

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

  http://qemu-project.org/Contribute/SubmitAPatch
  http://qemu-project.org/Contribute/TrivialPatches


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:

  http://qemu-project.org/Contribute/ReportABug


Contact
=======

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

 - qemu-devel@nongnu.org
   http://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:

  http://qemu-project.org/Contribute/StartHere

-- End