On Fri, May 20, 2022 at 3:03 PM Brian Cowan <brcowan@xxxxxxxxx> wrote: > > Well, the weird thing is that this is hypervisor-specific. KVM=kaboom. > VirtualBox is happy, and we can't make this happen on > roughly-analogous ESX hosts. I can't directly test on my (ubuntu) > laptop because the driver won't build on the too-new ubuntu 20.04.2 > "Hardware enablement" kernel as it's too new. But either all the other > hypervisors are doing this wrong and allowing this access, or KVM is. > > Not being a kernel expert makes this interesting. I'm passing the > possibility list over the wall to the kernel folks, but most of the > evidence we're seeing **seems** to point to KVM... Which version of kvm? Any unusual kvm module parameters? Does the guest under the happy hypervisors report that it has smap (in /proc/cpuidinfo)?
