linux-kernel - Re: [V2 PATCH 5/8] KVM: selftests: x86: delete svm_vmcall

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Message-ID: <CAGtprH800a_Gz6QVbnAVD7og4yimpRd6k_TziJy3z4x8o3x53Q@mail.gmail.com>
Date:   Mon, 26 Sep 2022 16:32:43 -0700
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     David Matlack <dmatlack@...gle.com>
Cc:     x86 <x86@...nel.org>, kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-kselftest@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>, shuah <shuah@...nel.org>,
        Ben Gardon <bgardon@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Oliver Upton <oupton@...gle.com>, peterx@...hat.com,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [V2 PATCH 5/8] KVM: selftests: x86: delete svm_vmcall_test

On Wed, Sep 21, 2022 at 2:34 PM David Matlack <dmatlack@...gle.com> wrote:
>
> On Thu, Sep 15, 2022 at 12:04:45AM +0000, Vishal Annapurve wrote:
> > svm_vmcall_test is superseded by fix_hypercall_test.
>
> Please provide a more detailed description of why svm_vmcall_test is
> being dropped. e.g. What do you mean by "superseded" specifically?
>
> I ask because this will be helpful context for future readers of this
> commit. I also ask because it's not clear to me that fix_hypercall_test
> is a 1:1 replacement of svm_vmcall_test. e.g. svm_vmcall_test sets up an
> L2 while fix_hypercall_test just executes in L1.
>

You are right, I earlier wrongly interpreted it to be just testing
vmcall, but it also does vmcall from L2.
I will exclude this change in the next series.

> >
> > Suggested-by: Sean Christopherson <seanjc@...gle.com>
> > Signed-off-by: Vishal Annapurve <vannapurve@...gle.com>
> > ---
> > --
> > 2.37.2.789.g6183377224-goog
> >