From: bugzilla-daemon@kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 215964] nVMX: KVM(L0) does not perform a platform reboot when guest(L2) trigger a reboot event through IO-Port-0xCF9
Date: Thu, 12 May 2022 01:36:07 +0000 [thread overview]
Message-ID: <bug-215964-28872-iMikjjTS8E@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-215964-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=215964
--- Comment #4 from Yadong Qi (yadong.qi@intel.com) ---
I think the OUT of 0xCF9 is forwarded to QEMU , because there is no any
0xCF9-OUT VMExit in L1 been traced.
Besides, the first VMExit in L1 after the OUT is a RDMSR-VMExit which is
totally unexpected, and the guest(L2) RIP is 0xFFF0. So I guess L0(QEMU/KVM)
has reset part of the vCPU, but the not cleared the nVMX state, so when L0
resume guest, it still treat L1 as alive and emulate unexpected VMExit to L1.
--
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next prev parent reply other threads:[~2022-05-12 1:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 2:45 [Bug 215964] New: nVMX: KVM(L0) does not perform a platform reboot when guest(L2) trigger a reboot event through IO-Port-0xCF9 bugzilla-daemon
2022-05-10 16:01 ` [Bug 215964] " bugzilla-daemon
2022-05-11 2:29 ` bugzilla-daemon
2022-05-11 13:55 ` bugzilla-daemon
2022-05-12 1:36 ` bugzilla-daemon [this message]
2022-05-12 14:06 ` bugzilla-daemon
2022-05-13 1:50 ` bugzilla-daemon
2023-01-26 10:03 ` bugzilla-daemon
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