On Fri, Jun 30, 2023 at 12:07:00PM +0200, Peter Zijlstra wrote: > On Thu, Jun 29, 2023 at 10:33:38AM +0000, Huang, Kai wrote: > > Looking at the later versions of TDX spec (with TD live migration, etc), it > > seems they are already using R12-R13 as SEAMCALL output: > > > > https://cdrdv2.intel.com/v1/dl/getContent/733579 > > Urgh.. I think I read an older versio because I got bleeding eyes from > all this colour coded crap. > > All this red is unreadable :-( Have they been told about the glories of > TeX and diff ? > > > E.g., 6.3.15. NEW: TDH.IMPORT.MEM Leaf > > > > It uses R12 and R13 as input. > > 12 and 14. They skipped 13 for some mysterious raisin. Things like TDH.SERVTD.BIND do use R13. > But also, 10,11 are frequently used as input with this new stuff, which > already suggests the setup from your patches is not tenable. TDG.SERVTD.RD *why* can't they pass that TD_UUID as a pointer? Using *4* registers like that is quite insane. TDG.VP.ENTER :-(((( that has b,15,si,di as additional output. That means there's not a single register left unused. Can we still get this changed, please?!?
