linux-kernel - Re: [PATCH v4 05/13] KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA

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Date:   Tue, 19 Sep 2023 15:20:06 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Paul Durrant <paul@....org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Paul Durrant <pdurrant@...zon.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v4 05/13] KVM: pfncache: allow a cache to be activated
 with a fixed (userspace) HVA

On Tue, 2023-09-19 at 13:41 +0000, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@...zon.com>
> 
> Some cached 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 think I gave you one of these in a previous round, but

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


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