linux-kernel - Re: [PATCH v9 08/15] KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA

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Date:   Wed, 22 Nov 2023 12:25:05 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Paul Durrant <paul@....org>,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 08/15] KVM: pfncache: allow a cache to be activated
 with a fixed (userspace) HVA

On Wed, 2023-11-22 at 12:18 +0000, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@...zon.com>
> 
> Some pfncache pages may actually be overlays on guest memory that have a
> fixed HVA within the VMM. It's pointless to invalidate such cached
> mappings if the overlay is moved so allow a cache to be activated directly
> with the HVA to cater for such cases. A subsequent patch will make use
> of this facility.
> 
> Signed-off-by: Paul Durrant <pdurrant@...zon.com>

I like that better now. Thank you.

Reviewed-by: David Woodhouse <dwmw@...zon.co.uk>



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