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.
Paolo
