docs/system/cpu-models-x86.rst.inc

5 CPU models on x86 hosts. The goals are to maximise performance, while
7 enabling live migration between hosts with heterogeneous CPU models.
10 Two ways to configure CPU models with QEMU / KVM
24     QEMU comes with a number of predefined named CPU models, that
33 Libvirt supports a third way to configure CPU models known as "Host
42 ABI compatibility levels for CPU models
50 can be satisfied by the QEMU CPU models. Note that the table only
59    :file: cpu-models-x86-abi.csv
64 Preferred CPU models for Intel x86 hosts
67 The following CPU models are preferred for use on Intel hosts.
70 mixture of host CPU models between machines, if live migration
116 all, of the named CPU models listed above. In general all of these
122   Included by default in Haswell, Broadwell & Skylake Intel CPU models.
125   IvyBridge Intel CPU models. Note that some desktop/mobile Westmere
131   Included by default in Intel CPU models with -IBRS suffix.
133   Must be explicitly turned on for Intel CPU models without -IBRS
143   Must be explicitly turned on for all Intel CPU models.
153   Must be explicitly turned on for all Intel CPU models.
163   Should be explicitly turned on for all Intel CPU models.
173   Must be explicitly turned on for all Intel CPU models.
227 Preferred CPU models for AMD x86 hosts
230 The following CPU models are preferred for use on AMD hosts.
233 mixture of host CPU models between machines, if live migration
262 all, of the named CPU models listed above. In general all of these
268   Included by default in AMD CPU models with -IBPB suffix.
270   Must be explicitly turned on for AMD CPU models without -IBPB suffix.
279   Must be explicitly turned on for all AMD CPU models.
289   Must be explicitly turned on for all AMD CPU models.
303   Must be explicitly turned on for all AMD CPU models.
325   Should be explicitly turned on for all AMD CPU models.
330 Default x86 CPU models
333 The default QEMU CPU models are designed such that they can run on all
338 The default CPU models will, however, leave the guest OS vulnerable to
354 The following CPUs models are compatible with most AMD and Intel x86
361     Legacy models just for historical compatibility with ancient QEMU
365     Various very old x86 CPU models, mostly predating the introduction
370 Syntax for configuring CPU models
374 CPU models / features in QEMU and libvirt.
391 Named CPU models:
397 Named CPU models with feature customization: