From: Markus Armbruster <armbru@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Eduardo Habkost" <eduardo@habkost.net>,
"Daniel P. Berrangé" <berrange@redhat.com>
Subject: x86 CPU properties "family", "model", "stepping", "tsc-freq"
Date: Wed, 09 Oct 2024 13:01:40 +0200 [thread overview]
Message-ID: <87wmihr14b.fsf@pond.sub.org> (raw)
QOM properties serve several purposes: initial configuration (external
interface), run time control and monitoring (external interface), and
internal purposes like versioning. Which purpose(s) a property serves
is often unclear.
The x86 CPU properties "family", "model", and "stepping" are used
internally; see target/i386/cpu.c and hw/i386/pc.c. I figure changing
them at run time makes no sense. What about configuration? Can the
user set arbitrary CPU properties? If yes, are these properties meant
to be set by the user?
Property "tsc-freq" seems not to be used internally. I figure changing
it at run time makes no sense. Looks like it is be meant to be set by
the user: x86_cpu_parse_featurestr() seems to parse it from the argument
of -cpu. Correct? Note that -cpu help doesn't mention it.
next reply other threads:[~2024-10-09 11:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-09 11:01 Markus Armbruster [this message]
2024-10-09 11:35 ` x86 CPU properties "family", "model", "stepping", "tsc-freq" Daniel P. Berrangé
2024-10-09 11:47 ` Markus Armbruster
2024-10-09 13:44 ` Markus Armbruster
2024-10-09 13:47 ` Daniel P. Berrangé
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