if (hypervisor_is_type(X86_HYPER_XEN_PV)) {
pti_print_if_insecure("disabled on XEN PV.");
return;
}I have wondered what the impact would be on hypervisors. Xen seems like they patched it in a way that removes the need for guests to mitigate, but would guests of other hypervisors get hit with the penalty twice in some cases?
Google says guests need to upgrade.
"Compute Engine customers must update their virtual machine operating systems and applications so that their virtual machines are protected from intra-guest attacks and inter-guest attacks that exploit application-level vulnerabilities."
"Compute Engine customers should work with their operating system provider(s) to download and install the necessary patches."