mirror of https://github.com/xemu-project/xemu.git
df7625d422
Currently TCE tables are created once at start and their sizes never change. We are going to change that by introducing a Dynamic DMA windows support where DMA configuration may change during the guest execution. This changes spapr_tce_new_table() to create an empty zero-size IOMMU memory region (IOMMU MR). Only LIOBN is assigned by the time of creation. It still will be called once at the owner object (VIO or PHB) creation. This introduces an "enabled" state for TCE table objects, some helper functions are added: - spapr_tce_table_enable() receives TCE table parameters, stores in sPAPRTCETable and allocates a guest view of the TCE table (in the user space or KVM) and sets the correct size on the IOMMU MR; - spapr_tce_table_disable() disposes the table and resets the IOMMU MR size; it is made public as the following DDW code will be using it. This changes the PHB reset handler to do the default DMA initialization instead of spapr_phb_realize(). This does not make differenct now but later with more than just one DMA window, we will have to remove them all and create the default one on a system reset. No visible change in behaviour is expected except the actual table will be reallocated every reset. We might optimize this later. The other way to implement this would be dynamically create/remove the TCE table QOM objects but this would make migration impossible as the migration code expects all QOM objects to exist at the receiver so we have to have TCE table objects created when migration begins. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> |
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|---|---|---|
| audio | ||
| backends | ||
| block | ||
| bsd-user | ||
| contrib | ||
| crypto | ||
| default-configs | ||
| disas | ||
| docs | ||
| dtc@65cc4d2748 | ||
| fpu | ||
| fsdev | ||
| gdb-xml | ||
| hw | ||
| include | ||
| io | ||
| libdecnumber | ||
| linux-headers | ||
| linux-user | ||
| migration | ||
| nbd | ||
| net | ||
| pc-bios | ||
| pixman@87eea99e44 | ||
| po | ||
| qapi | ||
| qga | ||
| qobject | ||
| qom | ||
| replay | ||
| roms | ||
| scripts | ||
| slirp | ||
| stubs | ||
| target-alpha | ||
| target-arm | ||
| target-cris | ||
| target-i386 | ||
| target-lm32 | ||
| target-m68k | ||
| target-microblaze | ||
| target-mips | ||
| target-moxie | ||
| target-openrisc | ||
| target-ppc | ||
| target-s390x | ||
| target-sh4 | ||
| target-sparc | ||
| target-tilegx | ||
| target-tricore | ||
| target-unicore32 | ||
| target-xtensa | ||
| tcg | ||
| tests | ||
| trace | ||
| ui | ||
| util | ||
| .dir-locals.el | ||
| .exrc | ||
| .gitignore | ||
| .gitmodules | ||
| .mailmap | ||
| .travis.yml | ||
| CODING_STYLE | ||
| COPYING | ||
| COPYING.LIB | ||
| Changelog | ||
| HACKING | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.objs | ||
| Makefile.target | ||
| README | ||
| VERSION | ||
| accel.c | ||
| aio-posix.c | ||
| aio-win32.c | ||
| arch_init.c | ||
| async.c | ||
| balloon.c | ||
| block.c | ||
| blockdev-nbd.c | ||
| blockdev.c | ||
| blockjob.c | ||
| bootdevice.c | ||
| bt-host.c | ||
| bt-vhci.c | ||
| configure | ||
| cpu-exec-common.c | ||
| cpu-exec.c | ||
| cpus.c | ||
| cputlb.c | ||
| device-hotplug.c | ||
| device_tree.c | ||
| disas.c | ||
| dma-helpers.c | ||
| dump.c | ||
| exec.c | ||
| gdbstub.c | ||
| hmp-commands-info.hx | ||
| hmp-commands.hx | ||
| hmp.c | ||
| hmp.h | ||
| iohandler.c | ||
| ioport.c | ||
| iothread.c | ||
| kvm-all.c | ||
| kvm-stub.c | ||
| main-loop.c | ||
| memory.c | ||
| memory_mapping.c | ||
| module-common.c | ||
| monitor.c | ||
| numa.c | ||
| os-posix.c | ||
| os-win32.c | ||
| page_cache.c | ||
| qapi-schema.json | ||
| qdev-monitor.c | ||
| qdict-test-data.txt | ||
| qemu-bridge-helper.c | ||
| qemu-char.c | ||
| qemu-doc.texi | ||
| qemu-ga.texi | ||
| qemu-img-cmds.hx | ||
| qemu-img.c | ||
| qemu-img.texi | ||
| qemu-io-cmds.c | ||
| qemu-io.c | ||
| qemu-nbd.c | ||
| qemu-nbd.texi | ||
| qemu-options-wrapper.h | ||
| qemu-options.h | ||
| qemu-options.hx | ||
| qemu-seccomp.c | ||
| qemu-tech.texi | ||
| qemu-timer.c | ||
| qemu.nsi | ||
| qemu.sasl | ||
| qmp-commands.hx | ||
| qmp.c | ||
| qtest.c | ||
| rules.mak | ||
| softmmu_template.h | ||
| spice-qemu-char.c | ||
| tcg-runtime.c | ||
| tci.c | ||
| thread-pool.c | ||
| thunk.c | ||
| tpm.c | ||
| trace-events | ||
| translate-all.c | ||
| translate-all.h | ||
| translate-common.c | ||
| user-exec.c | ||
| version.rc | ||
| vl.c | ||
| xen-common-stub.c | ||
| xen-common.c | ||
| xen-hvm-stub.c | ||
| xen-hvm.c | ||
| xen-mapcache.c | ||
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
Complete details of the process for building and configuring QEMU for
all supported host platforms can be found in the qemu-tech.html file.
Additional information can also be found online via the QEMU website:
http://qemu-project.org/Hosts/Linux
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