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[Qemu-devel] [Bug 1042561] Re: Guest has no "xsave" feature with paramet
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [Bug 1042561] Re: Guest has no "xsave" feature with parameter "-cpu qemu64, +xsave" in qemu command line. |
Date: |
Fri, 16 Dec 2016 09:06:38 -0000 |
** Changed in: qemu
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1042561
Title:
Guest has no "xsave" feature with parameter "-cpu qemu64,+xsave" in
qemu command line.
Status in QEMU:
Invalid
Bug description:
Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32e
Guest OS Type (Linux/Windows):Linux
kvm.git Commit:1a577b72475d161b6677c05abe57301362023bb2
qemu-kvm Commit:98f1f30a89901c416e51cc70c1a08d9dc15a2ad4
Host Kernel Version:3.5.0-rc1
Hardware:Romley-EP, Ivy-bridge
Bug detailed description:
--------------------------
Guest has no "xsave" feature when create guest with parameter "-cpu
qemu64,+xsave,+avx" in qemu command line, but the guest has avx feature.
When starting a guest with parameter "-cpu host" in qemu command line, the
guest has 'avx' and 'xsave' features (as /proc/cpuinfo shows).
This is not a recent regression; it exists for a long time.
Reproduce steps:
----------------
1. qemu-system-x86_64 -m 1024 -smp 2 -hda rhel6u3.img -cpu qemu64,+xsave
2. cat /proc/cpuinfo | grep xsave ( check guest's xsave feature)
Current result:
----------------
The guest has no xsave feature
Expected result:
----------------
The guest has xsave feature
Basic root-causing log:
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- [Qemu-devel] [Bug 1042561] Re: Guest has no "xsave" feature with parameter "-cpu qemu64, +xsave" in qemu command line.,
Thomas Huth <=