linux-kernel - Re: [PATCH v8 12/18] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap.

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Message-ID: <617d3cba-cbe0-0f18-bdf2-e73a70e472d6@redhat.com>
Date:   Fri, 4 Dec 2020 12:08:20 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Ashish Kalra <Ashish.Kalra@....com>
Cc:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        joro@...tes.org, bp@...e.de, Thomas.Lendacky@....com,
        x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        srutherford@...gle.com, rientjes@...gle.com,
        venu.busireddy@...cle.com, brijesh.singh@....com
Subject: Re: [PATCH v8 12/18] KVM: SVM: Add support for static allocation of
 unified Page Encryption Bitmap.

On 05/05/20 23:18, Ashish Kalra wrote:
> Add support for static 
> allocation of the unified Page encryption bitmap by extending 
> kvm_arch_commit_memory_region() callack to add svm specific x86_ops 
> which can read the userspace provided memory region/memslots and 
> calculate the amount of guest RAM managed by the KVM and grow the bitmap 
> based on that information, i.e. the highest guest PA that is mapped by a 
> memslot.

Hi Ashish,

the commit message should explain why this is needed or useful.

Paolo