From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 204209] kernel 5.2.1: "floating point exception" in qemu with kvm enabled
Date: Sun, 28 Jul 2019 12:03:53 +0000 [thread overview]
Message-ID: <bug-204209-28872-4WZEoEeYbQ@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-204209-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=204209
--- Comment #3 from anthony (antdev66@gmail.com) ---
Today I saw the following commit:
>Revert "kvm: x86: Use task structs fpu field for user"
>commit ec269475cba7bcdd1eb8fdf8e87f4c6c81a376fe upstream.
>
>This reverts commit 240c35a3783ab9b3a0afaba0dde7291295680a6b
>("kvm: x86: Use task structs fpu field for user", 2018-11-06).
>The commit is broken and causes QEMU's FPU state to be destroyed
>when KVM_RUN is preempted.
>
>Fixes: 240c35a3783a ("kvm: x86: Use task structs fpu field for user")
applied to the 5.2.4 kernel and I thought it could relate to the reported bug,
but recompiling the kernel without previous indicated patch, the guest report
"fpu exception" error again: it was necessary to re-include the patch and
recompile the kernel for it to work.
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next prev parent reply other threads:[~2019-07-28 12:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 14:27 [Bug 204209] New: kernel 5.2.1: "floating point exception" in qemu with kvm enabled bugzilla-daemon
2019-07-18 12:28 ` [Bug 204209] " bugzilla-daemon
2019-07-19 20:46 ` bugzilla-daemon
2019-07-28 12:03 ` bugzilla-daemon [this message]
2019-07-31 11:15 ` bugzilla-daemon
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