linux-kernel - Re: [PATCH v2 3/4] KVM: SVM: move sev_bind

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Message-ID: <CAA03e5HK1Qkk0uyZRi_ncFewJ5yStXWGT7REQdYQ2Z1BYHcCew@mail.gmail.com>
Date:   Thu, 9 Sep 2021 18:23:29 -0700
From:   Marc Orr <marcorr@...gle.com>
To:     Mingwei Zhang <mizhang@...gle.com>
Cc:     Brijesh Singh <brijesh.singh@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        John Allen <john.allen@....com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm <kvm@...r.kernel.org>,
        linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Alper Gun <alpergun@...gle.com>,
        Borislav Petkov <bp@...en8.de>,
        David Rienjes <rientjes@...gle.com>,
        Peter Gonda <pgonda@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>
Subject: Re: [PATCH v2 3/4] KVM: SVM: move sev_bind_asid to psp

On Thu, Sep 9, 2021 at 6:18 PM Mingwei Zhang <mizhang@...gle.com> wrote:
>
> > I believe once we are done with it, will have 5 functions that will need
> >  >=8 arguments. I don't know if its acceptable.
> >
> > > In addition, having to construct each sev_data_* structure in KVM code
> > > is also a pain and  consumes a lot of irrelevant lines as well.
> > >
> >
> > Maybe I am missing something, aren't those lines will be moved from KVM
> > to PSP driver?
> >
> > I am in full support for restructuring, but lets look at full set of PSP
> > APIs before making the final decision.
> >
> > thanks
> >
>
> Oh, sorry for the confusion. I think the current feedback I got is
> that my restructuring patchset was blocked due to the fact that it is
> a partial one. So, if this patchset got checked in, then the psp-sev.h
> will have two types of APIs: ones that use sev_data_* structure and
> ones that do not. So one of the worries is that this would make the
> situation even worse.
>
> So that's why I am thinking that maybe it is fine to just avoid using
> sev_data_* for all PSP functions exposed to KVM? I use the number of
> arguments as the justification. But that might not be a good one.
>
> In anycase, I will not rush into any code change before we reach a consensus.

Isn't the first patch in this patch set a straight-forward bug fix
:-)? Assuming others agree, I'd suggest to re-send that one out as a
single patch on its own, so we can get it merged while the rest of
this patch set works its way through the process.