On 09/10/19 02:41, Aaron Lewis wrote: > - /* > - * The only supported bit as of Skylake is bit 8, but > - * it is not supported on KVM. > - */ > - if (data != 0) > - return 1; This comment is actually not true anymore; Intel supports PT (bit 8) on Cascade Lake, so it could be changed to something like /* * We do support PT (bit 8) if kvm_x86_ops->pt_supported(), but * guests will have to configure it using WRMSR rather than * XSAVES. */ Paolo