Re: image works in native but not in vm when cpu mode='host-passthrough' is set

Greetings Martin, > Sent: Thursday, November 19, 2020 at 11:23 PM > From: "Martin Kletzander" <mkletzan(a)redhat.com&gt; > To: "daggs" <daggs(a)gmx.com&gt; > Cc: "libvirt-usersredhat.com" <libvirt-users(a)redhat.com&gt; > Subject: Re: image works in native but not in vm when cpu mode='host-passthrough' is set > > On Tue, Nov 17, 2020 at 11:32:29AM +0100, daggs wrote: > ... > Not sure, but there might be some flags that are not passed through even with > host-passthrough. Virtualisation ones are definitely one of those that need to > be enabled on top of host-passthrough. The easiest thing to check that I can > think of would be booting some live distro and checking the flags in > /proc/cpuinfo and how are they different from your host. > I don't need livecd, I can diff both native and vm, see https://dpaste.com/ARETBEPCL from what I can see, the vm is missing these flags: dts acpi tm pbe art pebs bts nonstop_tsc aperfmperf dtes64 monitor ds_cpl est tm2 sdbg xtpr pdcm epb intel_pt dtherm pln pts hwp hwp_notify hwp_act_window hwp_epp and have these flags: tsc_known_freq hypervisor umip arch_capabilities beside the acpi flag which I found strange to be messing, I can't think of any other flag which might be needed.

Dagg.