Re: [PATCH v4 0/4] Add support for XMM fast hypercalls

[Paolo Bonzini]

On 06/07/21 17:15, Siddharth Chandrasekaran wrote:
> 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.

No problem! The patches for the rc period (in your case it was 5.13) go 
in master, while yours ended up in next (destined for 5.14).

I usually update master only after 5.14-rc1 is out.  In this case I 
didn't even have access to kvm.git on the day that Linus pulled your 
patches into his tree.

Paolo