On Tue, Jul 06, 2021 at 05:04:59PM +0200, Paolo Bonzini wrote: > On 30/06/21 13:56, Siddharth Chandrasekaran wrote: > > On Wed, May 26, 2021 at 10:56:07AM +0200, Siddharth Chandrasekaran wrote: > > > Hyper-V supports the use of XMM registers to perform fast hypercalls. > > > This allows guests to take advantage of the improved performance of the > > > fast hypercall interface even though a hypercall may require more than > > > (the current maximum of) two general purpose registers. > > > > > > The XMM fast hypercall interface uses an additional six XMM registers > > > (XMM0 to XMM5) to allow the caller to pass an input parameter block of > > > up to 112 bytes. Hyper-V can also return data back to the guest in the > > > remaining XMM registers that are not used by the current hypercall. > > > > > > 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. This patchset adds > > > necessary infrastructure for handling input/output via XMM registers and > > > patches kvm_hv_flush_tlb() to use xmm input arguments. > > > > Hi Paolo, > > > > Are you expecting more reviews on these patches? > > They are part of 5.14 already. :) Ahh, I see them now. I was expecting them to show up in master - that was the confusion. Thanks! :) ~ 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
