Messages in this thread | | | Subject | Re: [PATCH 0/4] Add support for XMM fast hypercalls | From | Paolo Bonzini <> | Date | Thu, 8 Apr 2021 17:48:19 +0200 |
| |
On 08/04/21 17:40, Siddharth Chandrasekaran 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. > The guest is at fault here as it expects Hyper-V to consume arguments > from XMM registers for certain hypercalls (that we are working) even if > we didn't expose the feature via CPUID bits.
What guest is that?
Paolo
| |