On Thu, Apr 08, 2021 at 03:38:13PM +0000, Wei Liu wrote: > On Thu, Apr 08, 2021 at 05:30:26PM +0200, Paolo Bonzini wrote: > > On 08/04/21 17:28, Wei Liu wrote: > > > > Although the Hyper-v TLFS mentions that a guest cannot use this feature > > > > unless the hypervisor advertises support for it, some hypercalls which > > > > we plan on upstreaming in future uses them anyway. > > > > > > No, please don't do this. Check the feature bit(s) before you issue > > > hypercalls which rely on the extended interface. > > > > Perhaps Siddharth should clarify this, but I read it as Hyper-V being buggy > > and using XMM arguments unconditionally. > > > > There is no code in upstream Linux that uses the XMM fast hypercall > interface at the moment. > > If there is such code, it has bugs in it and should be fixed. :-) None of the existing hypercalls are buggy. These are some hypercalls we are working on (and planning on upstreaming in the near future). ~ Sid. Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879
