Probably in most cases. Vmware have disclaimers in the mitigation options that preclude turning off HT, meaning, use at your own risk. [1] I am still waiting

Probably in most cases. Vmware have disclaimers in the mitigation options that preclude turning off HT, meaning, use at your own risk. [1] I am still waiting on a comment from Linode [2] Openstack have some knobs you can adjust, but it really depends on your workloads and what risk you are willing to accept. [3] AWS have their own custom hypervisor and are said to have worked around the issue. [4] Amazon had info on this before others. It appears they have a special relationship with Intel? I have not found any hardware or OS vendors that are willing to say that you can leave HT enabled. It is a very heated topic because folks will have to increase their VM infrastructure anywhere from 5% to 50% depending on their workload profiles. For public clouds, you can't predict workload profiles. Edit: Oops I left out the main site for L1TF [5] [1] - https://kb.vmware.com/s/article/55806 https://kb.vmware.com/s/article/55806 [2] - https://blog.linode.com/2018/08/16/intels-l1tf-cpu-vulnerabilities-linode/ https://blog.linode.com/2018/08/16/intels-l1tf-cpu-vulnerabi... [3] - https://access.redhat.com/articles/3569281 https://access.redhat.com/articles/3569281 [4] - https://aws.amazon.com/security/security-bulletins/AWS-2018-019/ https://aws.amazon.com/security/security-bulletins/AWS-2018-... [5] - https://foreshadowattack.eu/ https://foreshadowattack.eu/