Good Day John,
I tried to reproduce the problem on my side, using KVM
accelerated with the module kvm_intel from Debian native kernel
4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 (2019-05-13).
I encountered the following trace in my `dmesg` output, which is
only remotely related to kvm_intel:
[ 89.389480] kvm: zapping shadow pages for mmio generation wraparound
[ 120.924745] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x1c9
[ 120.928959] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x1a6
[ 120.933429] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x1a7
[ 120.938123] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x3f6
[ 120.942968] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x3f7
[ 120.971155] kvm: zapping shadow pages for mmio generation wraparound
[ 121.498463] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x64e
[ 121.503585] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x34
[ 125.592208] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x606
[ 126.334166] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x611
[ 126.339807] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x639
[ 126.345627] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x641
[ 126.351708] kvm [1716]: vcpu0, guest rIP: 0xffffffffaea5a602
unhandled rdmsr: 0x619
While you were seeing:
> > > [ 6.234764] kvm_intel: Unknown symbol cpu_tlbstate (err -22)
> > > [ 6.235463] kvm_intel: Unknown symbol mds_user_clear (err 0)
> > > [ 6.330732] kvm_intel: disagrees about version of symbol cpu_tlbstate
On my side, my messages did not prove to be fatal. I have been
able to start virtual machines.
Using upstream kernel 4.19.45 on another machine did not show
any issues at all. I don't know if that could be eligible to
additional material or not to the bug report (well if you
issued one :). I thought it might have been worth mentioning
anyway.
Perhaps the CPU model has it's importance, I used an Intel Xeon
W-2104 for my test with the native Debian kernel, and an Intel
i7 of 7th generation for my test with upstream kernel.
Kind Regards,
--
Étienne Mollier <etienne.moll...@mailoo.org>
