linux-kernel - Re: [PATCH v7 00/11] KVM: xen: update shared_info and vcpu

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Message-ID: <bf34f990-4f32-4cd3-9dd0-df1cf9187b25@xen.org>
Date:   Thu, 5 Oct 2023 09:36:17 +0100
From:   Paul Durrant <xadimgnik@...il.com>
To:     David Woodhouse <dwmw2@...radead.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Paul Durrant <pdurrant@...zon.com>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Subject: Re: [PATCH v7 00/11] KVM: xen: update shared_info and vcpu_info
 handling

On 05/10/2023 07:41, David Woodhouse wrote:
> On Mon, 2023-10-02 at 09:57 +0000, Paul Durrant wrote:
>> From: Paul Durrant <pdurrant@...zon.com>
>>
>> The following text from the original cover letter still serves as an
>> introduction to the series:
>>
>> "Currently we treat the shared_info page as guest memory and the VMM
>> informs KVM of its location using a GFN. However it is not guest memory as
>> such; it's an overlay page. So we pointlessly invalidate and re-cache a
>> mapping to the *same page* of memory every time the guest requests that
>> shared_info be mapped into its address space. Let's avoid doing that by
>> modifying the pfncache code to allow activation using a fixed userspace HVA
>> as well as a GPA."
>>
>> This version of the series is functionally the same as version 6. I have
>> simply added David Woodhouse's R-b to patch 11 to indicate that he has
>> now fully reviewed the series.
> 
> Thanks. I believe Sean is probably waiting for us to stop going back
> and forth, and for the dust to settle. So for the record: I think I'm
> done heckling and this is ready to go in.
> 
> Are you doing the QEMU patches or am I?
> 

I'll do the QEMU changes, once the patches hit kvm/next.