Hello, Since kernel 5.16 users can't start VMware VMs when it is nested under KVM on AMD CPUs. User reports are here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008583 https://forums.unraid.net/topic/128868-vmware-7x-will-not-start-any-vms-under-unraid-6110/ I've pinpointed it to commit 174a921b6975ef959dd82ee9e8844067a62e3ec1 (appeared in 5.16rc1) "nSVM: Check for reserved encodings of TLB_CONTROL in nested VMCB" I've confirmed that VMware errors out when it checks for TLB_CONTROL_FLUSH_ASID support and gets a 'false' answer. First revisions of the patch in question had some support for TLB_CONTROL_FLUSH_ASID, but it was removed: https://lore.kernel.org/kvm/f7c2d5f5-3560-8666-90be-3605220cb93c@xxxxxxxxxx/ I don't know what would be the best case here, maybe put a quirk there, so it doesn't break "userspace". Committer's email is dead, so I'm writing here.
