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/qemu/docs/devel/
H A Dblkverify.txt19 The blkverify protocol has two child block devices, the "test" device and the
23 The "raw" device is a raw image, a flat file, that has identical starting
34 Imagine raw.img has 0xcd repeated throughout its first sector:
H A Dmulti-thread-tcg.rst12 system-mode emulation. user-mode emulation has always mirrored the
30 guest has had the required work done to support this safely
98 Each vCPU has its own TCG context and associated TCG region, thereby
265 The Linux kernel has an excellent `write-up
285 fairly strong guarantees of sequential consistency whereas Arm has
299 The system currently has a tcg_gen_mb() which will add memory barrier
318 are often seen when code modification has taken place to ensure the
333 guarantee that a region of memory has not been touched between the
336 successful store only if no other CPU has accessed the memory region
339 Traditionally TCG has generated a series of operations that work
H A Datomics.rst48 either side of it to the other side. The compiler barrier has no direct
209 Note that the first load really has to have a _data_ dependency and not
221 mostly used when a data structure has one thread that is always a writer
298 either *acquire* or *release* semantics [#rmw]_. This has two effects:
316 - ``pthread_mutex_lock`` has acquire semantics, ``pthread_mutex_unlock`` has
321 ``pthread_cond_wait`` has both release semantics (synchronizing with
325 - ``pthread_create`` has release semantics and synchronizes with the start
326 of the new thread; ``pthread_join`` has acquire semantics and synchronizes
329 - ``qemu_event_set`` has release semantics, ``qemu_event_wait`` has
399 Finally, this more complex example has more than two accesses and data
H A Ddecodetree.rst9 Each pattern has both *fixedbits* and *fixedmask*, the combination of which
47 cannot currently do both at once (i.e. pattern P uses format F; F has
49 has a field C that refers to a named field D that is defined in F).
179 come in handy when fields overlap between patterns and one has to
233 When the *cf* field is zero, the instruction has no side effects,
235 is discarded and so the instruction has no effect. When the *rt2*
H A Dzoned-storage.rst20 - BLK_Z_NONE: The non-zoned model has no zones support. It includes both
26 block layer while processing I/O requests. A BlockBackend has a root pointer to
55 Additionally, QEMU has several ways of supporting zoned storage, including:
H A Dreset.rst105 local state of the object; it must not do anything that has a side-effect
110 group which is being reset has had its *enter* phase executed. At this point
123 the object does not need to care how many of reset controllers it has and how
131 must provide and what functions it has access to. It is intended for people
132 who want to implement or convert a class which has the resettable interface;
229 This function may be used if the object behavior has to be adapted
230 while in reset state. For example if a device has an irq input,
319 the current machine, if it has one. That method must call
320 ``qemu_devices_reset()``. If the machine has no reset method,
/qemu/docs/system/arm/
H A Dnuvoton.rst8 Hyperscale applications. The former is a superset of the latter, so NPCM750 has
13 The NPCM750 SoC has two Cortex-A9 cores and is targeted for the Enterprise
18 The NPCM730 SoC has two Cortex-A9 cores and is targeted for Data Center and
/qemu/
H A D.patchew.yml3 # Patchew configuration in case patchew.org disappears or has to be
156 # HEAD pointing to a commit that has the patches applied on top of "base"
185 # HEAD pointing to a commit that has the patches applied on top of "base"
214 # HEAD pointing to a commit that has the patches applied on top of "base"
239 # HEAD pointing to a commit that has the patches applied on top of "base"
/qemu/docs/about/
H A Ddeprecated.rst210 The ``dtb-kaslr-seed`` property on the ``virt`` board has been
225 The machine is no longer in existence and has been long unmaintained
242 the codebase, and over many years nobody has been interested in
245 has now passed away into history. We are therefore dropping support
295 has used a properly allocated identifier. Deprecate the ``use-intel-id``
309 The 9p ``proxy`` filesystem backend driver has been deprecated and will be
327 has indicated plans for such kind of reimplementation unfortunately.
332 The 'any' CPU type was introduced back in 2018 and has been around since the
333 initial RISC-V QEMU port. Its usage has always been unclear: users don't know
337 After the introduction of the 'max' CPU type, RISC-V now has a good coverage
[all …]
/qemu/docs/system/
H A Dsecurity.rst14 requirements than others. The community has agreed on the overall security
70 guest has escaped the virtual machine and is able to act in the context of the
81 The principle of least privilege states that each component only has access to
83 each process only has access to resources belonging to the guest.
87 QEMU process since it already has access to those same resources from within
91 requirements. For example, guest A only has access to its own disk image file
/qemu/qapi/
H A Djob.json48 # @created: The job has been created, but not yet started.
66 # @pending: The job has finished its work, but has finalization steps
76 # @concluded: The job has finished all work. If auto-dismiss was set
202 # This command will refuse to operate on any job that has not yet
/qemu/docs/specs/
H A Dppc-spapr-uv-hcalls.rst14 Power Architecture Reference document ([LoPAR]_). An internal ACR has been filed
33 wrapped/encrypted using the public key of a trusted system which has the private
50 response, opening a new TPM session if one has not already been opened.
H A Dstandard-vga.rst41 The legacy-free variant has no ROM and has ``PCI_CLASS_DISPLAY_OTHER``
/qemu/docs/system/ppc/
H A Dpseries.rst169 a pSeries guest (or a PowerVM LPAR for that matter), and that is where it has
184 performance, maintenance work has been much more focused on it in the past
185 years. Maintenance for KVM-PR has been minimal.
201 This limitation has been lifted, and now it is possible to run KVM-HV inside
204 As KVM-HV has access to privileged instructions, guests that use a lot of these
205 can run much faster than with KVM-PR. On the other hand, the guest CPU has to be
287 enabled, whether or not the guest has actually entered secure mode.
/qemu/docs/
H A Digd-assign.txt4 IGD has two different modes for assignment using vfio-pci:
18 theoretically has no device specific handling dependencies on vfio-pci or
45 has been assigned to a VM. It's therefore generally recommended to prevent
67 to access the reserved GTT space after reset, which it no longer has access to
121 running the IGD ROM, which has other dependencies on the device appearing
/qemu/tests/qapi-schema/
H A Dunion-empty.err2 union-empty.json:4: union has no branches
H A Dbad-ident.err2 bad-ident.json:2: struct has an invalid name
H A Dreserved-command-q.err2 reserved-command-q.json:5: command has an invalid name
H A Dbad-if-keys.err2 bad-if-keys.json:2: 'if' condition of struct has conflicting keys
H A Dreserved-member-underscore.err2 reserved-member-underscore.json:4: 'data' member '_oops' has an invalid name
H A Dreserved-enum-q.err2 reserved-enum-q.json:4: 'data' member 'q-Unix' has an invalid name
H A Dreserved-member-q.err2 reserved-member-q.json:4: 'data' member 'q-unix' has an invalid name
H A Denum-bad-name.err2 enum-bad-name.json:3: 'data' member 'not\possible' has an invalid name
H A Dalternate-base.err2 alternate-base.json:4: alternate has unknown key 'base'
H A Dfeatures-unknown-key.err2 features-unknown-key.json:1: 'features' member has unknown key 'colour'

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