linux-kernel - Re: [PATCH] KVM: SEV: improve the code readability for ASID management

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Message-ID: <YQf1SDrEi8zl03Dv@8bytes.org>
Date:   Mon, 2 Aug 2021 15:38:16 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Mingwei Zhang <mizhang@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tom Lendacky <thomas.lendacky@....com>,
        Marc Orr <marcorr@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Alper Gun <alpergun@...gle.com>,
        Dionna Glaze <dionnaglaze@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>
Subject: Re: [PATCH] KVM: SEV: improve the code readability for ASID
 management

On Fri, Jul 30, 2021 at 06:13:04PM -0700, Mingwei Zhang wrote:
> Fix the min_asid usage: ensure that its usage is consistent with its name;
> adjust its value before using it as a bitmap position. Add comments on ASID
> bitmap allocation to clarify the skipping-ASID-0 property.
> 
> Fixes: 80675b3ad45f (KVM: SVM: Update ASID allocation to support SEV-ES guests)

This looks more like an optimization to me, or does this fix any real
bug?