From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Mark Cave-Ayland" <mark.cave-ayland@ilande.co.uk>,
devel@lists.libvirt.org, "Thomas Huth" <thuth@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Igor Mammedov" <imammedo@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
mst@redhat.com, "Eduardo Habkost" <eduardo@habkost.net>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Daniel P . Berrangé" <berrange@redhat.com>
Subject: [PATCH-for-9.0] hw/i386/pc: Deprecate 64-bit CPUs on ISA-only PC machine
Date: Wed, 27 Mar 2024 16:35:17 +0100 [thread overview]
Message-ID: <20240327153517.31285-1-philmd@linaro.org> (raw)
Per Daniel suggestion [*]:
> isapc could arguably be restricted to just 32-bit CPU models,
> because we should not need it to support any feature that didn't
> exist prior to circa 1995. eg refuse to start with isapc, if 'lm'
> is present in the CPU model for example.
[*] https://lore.kernel.org/qemu-devel/ZgQkS4RPmSt5Xa08@redhat.com/
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
docs/about/deprecated.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 7b548519b5..345c35507f 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -208,6 +208,13 @@ is no longer packaged in any distro making it harder to run the
``check-tcg`` tests. Unless we can improve the testing situation there
is a chance the code will bitrot without anyone noticing.
+64-bit (x86_64) CPUs on the ``isapc`` machine (since 9.0)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The ``isapc`` machine aims to emulate old PC machine without PCI was
+generalized, so hardware available around 1995, before 64-bit intel
+CPUs were produced.
+
System emulator machines
------------------------
--
2.41.0
next reply other threads:[~2024-03-27 15:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-27 15:35 Philippe Mathieu-Daudé [this message]
2024-03-27 15:57 ` [PATCH-for-9.0] hw/i386/pc: Deprecate 64-bit CPUs on ISA-only PC machine Daniel P. Berrangé
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