On 05.06.2020 10:02, Roger Pau Monné wrote: > On Fri, Jun 05, 2020 at 09:51:09AM +0200, Jan Beulich wrote: >> Both match prior generation processors as far as LBR and C-state MSRs >> go (SDM rev 072) as well as applicability of the if_pschange_mc erratum >> (recent spec updates). >> >> Signed-off-by: Jan Beulich <jbeul...@suse.com> >> --- >> Such changes having been subject to backporting in the past, this >> change may want considering for 4.14. >> --- >> I'm leaving alone spec_ctrl.c, albeit there's a scary looking erratum >> for Ice Lake indicating that MDS_NO may wrongly be set. But this is >> apparently addressed by ucode update, so we may not need to deal with >> it in software. >> >> --- a/xen/arch/x86/acpi/cpu_idle.c >> +++ b/xen/arch/x86/acpi/cpu_idle.c > > What about mwait-idle? I guess we pick that from Linux and no patch > has been added so far?
Correct. I've looked at recent history there, and I'm uncertain they'll add further models there. They look to prefer to use ACPI _CST now again with, as it seems, not overly much of a difference to the ACPI driver (which, if we were to follow, I'd rather see us integrate there). Jan
