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| author | Eduardo Habkost | 2017-01-16 22:11:22 +0100 |
|---|---|---|
| committer | Eduardo Habkost | 2017-02-27 17:23:13 +0100 |
| commit | a357a65b66a59488f3f5f09298a01df31319c624 (patch) | |
| tree | 642afe57d3d0b1aa0b111d70ae8aea9a4e4bb819 /qapi-schema.json | |
| parent | i386: Reorganize and document CPUID initialization steps (diff) | |
| download | qemu-a357a65b66a59488f3f5f09298a01df31319c624.tar.gz qemu-a357a65b66a59488f3f5f09298a01df31319c624.tar.xz qemu-a357a65b66a59488f3f5f09298a01df31319c624.zip | |
qapi-schema: Comment about full expansion of non-migration-safe models
Add a note warning that static expansion may not be 100% accurate
when the CPU model is not migration-safe. This will be the case
on x86 when expansing the "host" CPU model, because there are
"host" features that can't have a migration-safe representation
(e.g. "host-cache-info").
Message-Id: <20170116211124.29245-3-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'qapi-schema.json')
| -rw-r--r-- | qapi-schema.json | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/qapi-schema.json b/qapi-schema.json index 150ee98e9e..2051c46cfc 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -4274,6 +4274,15 @@ # migration-safe, but allows tooling to get an insight and work with # model details. # +# Note: When a non-migration-safe CPU model is expanded in static mode, some +# features enabled by the CPU model may be omitted, because they can't be +# implemented by a static CPU model definition (e.g. cache info passthrough and +# PMU passthrough in x86). If you need an accurate representation of the +# features enabled by a non-migration-safe CPU model, use @full. If you need a +# static representation that will keep ABI compatibility even when changing QEMU +# version or machine-type, use @static (but keep in mind that some features may +# be omitted). +# # Since: 2.8.0 ## { 'enum': 'CpuModelExpansionType', |