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Subject: Re: [PATCH 0/5] KVM: x86: Use kernel x86 cpuid utilities in KVM
 selftests
To:     Jim Mattson <jmattson@google.com>,
        Ricardo Koller <ricarkol@google.com>
Cc:     kvm@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
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        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Sean Christopherson <seanjc@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Joerg Roedel <joro@8bytes.org>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com
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From:   Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <16823e91-5caf-f52e-e0dc-28ebb9a87b47@redhat.com>
Date:   Thu, 8 Jul 2021 18:50:41 +0200
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On 29/06/21 19:28, Jim Mattson wrote:
>> Thanks. I was thinking about kvm-unit-tests, but the issue is that it
>> would also be a copy. And just like with kernel headers, it would be
>> ideal to keep them in-sync. The advantage of the kernel headers is that
>> it's much easier to check and fix diffs with them. On the other hand, as
>> you say, there would not be any #ifdef stuff with kvm=unit-tests. Please
>> let me know what you think.
>
> I think the kvm-unit-tests implementation is superior to the kernel
> implementation, but that's probably because I suggested it. Still, I
> think there's an argument to be made that selftests, unlike
> kvm-unit-tests, are part of the kernel distribution and should be
> consistent with the kernel where possible.
> 
> Paolo?

I also prefer the kvm-unit-tests implementation, for what it's worth... 
Let's see what the code looks like?

Paolo