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

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Message-ID: <Yz80XAg74KGdSqco@google.com>
Date:   Thu, 6 Oct 2022 20:02:36 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Vishal Annapurve <vannapurve@...gle.com>
Cc:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, pbonzini@...hat.com,
        vkuznets@...hat.com, wanpengli@...cent.com, jmattson@...gle.com,
        joro@...tes.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
        shuah@...nel.org, yang.zhong@...el.com, drjones@...hat.com,
        ricarkol@...gle.com, aaronlewis@...gle.com, wei.w.wang@...el.com,
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        jlayton@...nel.org, bfields@...ldses.org,
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        mizhang@...gle.com, bgardon@...gle.com
Subject: Re: [RFC V3 PATCH 3/6] selftests: kvm: ucall: Allow querying ucall
 pool gpa

On Fri, Aug 19, 2022, Vishal Annapurve wrote:
> Add a helper to query guest physical address for ucall pool
> so that guest can mark the page as accessed shared or private.
> 
> Signed-off-by: Vishal Annapurve <vannapurve@...gle.com>
> ---

This should be handled by the SEV series[*].  Can you provide feedback on that
series if having a generic way to map the ucall address as shared won't work?

[*] https://lore.kernel.org/all/20220829171021.701198-1-pgonda@google.com