Re: [PATCH] target/i386/kvm: Add Hyper-V direct tlb flush support

[Cornelia Huck <cohuck@redhat.com>]

On Mon, 14 Oct 2019 13:29:12 +0000
Tianyu Lan <Tianyu.Lan@microsoft.com> wrote:

> > > diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
> > > index 18892d6541..923fb33a01 100644
> > > --- a/linux-headers/linux/kvm.h
> > > +++ b/linux-headers/linux/kvm.h
> > > @@ -995,6 +995,7 @@ struct kvm_ppc_resize_hpt {
> > >  #define KVM_CAP_ARM_SVE 170
> > >  #define KVM_CAP_ARM_PTRAUTH_ADDRESS 171
> > >  #define KVM_CAP_ARM_PTRAUTH_GENERIC 172
> > > +#define KVM_CAP_HYPERV_DIRECT_TLBFLUSH 174  
> >
> > I was once told that scripts/update-linux-headers.sh script is supposed
> > to be used instead of cherry-picking stuff you need (adn this would be a
> > separate patch - update linux headers to smth).
> >  
> 
> Thanks for suggestion. I just try the update-linux-headers.sh and there are a lot
> of changes which are not related with my patch. I also include these
> changes in my patch, right?

The important part is that you split out the headers update as a
separate patch.

If this change is already included in the upstream kernel, just do a
complete update via the script (mentioning the base you did the update
against.) If not, include a placeholder patch that can be replaced by a
real update when applying.