linux-kernel - Re: [RFC V3 PATCH 3/6] selftests: kvm: ucall: Allow querying ucall pool gpa

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Message-ID: <CAGtprH-i6MDiYFQGf=cjOPcaTZyezObW7HpegBiFq6BPKa2jWQ@mail.gmail.com>
Date:   Tue, 18 Oct 2022 18:41:53 +0530
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, pbonzini@...hat.com,
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        bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
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Subject: Re: [RFC V3 PATCH 3/6] selftests: kvm: ucall: Allow querying ucall
 pool gpa

On Mon, Oct 17, 2022 at 11:38 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> On Mon, Oct 17, 2022, Vishal Annapurve wrote:
> > This is much sleeker and will avoid hacking KVM for testing. Only
> > caveat here is that these tests will not be able to exercise implicit
> > conversion path if we go this route.
>
> Yeah, I think that's a perfectly fine tradeoff.  Implicit conversion isn't strictly
> a UPM feature, e.g. if TDX and SNP "architecturally" disallowed implicit conversions,
> then KVM wouldn't need to support implicit conversions at all, i.e. that testing can
> be punted to SNP and/or TDX selftests.

Ack. Will address this feedback in the next series.