linux-kernel - Re: [PATCH 08/12] Drivers: hv: vmbus: Remove second way of mapping ring buffers

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Message-ID: <900971fc-e8c0-b81b-8836-c416554a4c22@gmail.com>
Date:   Thu, 3 Nov 2022 23:07:34 +0800
From:   Tianyu Lan <ltykernel@...il.com>
To:     Michael Kelley <mikelley@...rosoft.com>, hpa@...or.com,
        kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, luto@...nel.org,
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        hch@...radead.org, m.szyprowski@...sung.com, robin.murphy@....com,
        thomas.lendacky@....com, brijesh.singh@....com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        Tianyu.Lan@...rosoft.com, kirill.shutemov@...ux.intel.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, ak@...ux.intel.com,
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        jane.chu@...cle.com, seanjc@...gle.com, tony.luck@...el.com,
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        linux-pci@...r.kernel.org, linux-arch@...r.kernel.org,
        iommu@...ts.linux.dev
Subject: Re: [PATCH 08/12] Drivers: hv: vmbus: Remove second way of mapping
 ring buffers

On 10/21/2022 1:57 AM, Michael Kelley wrote:
> With changes to how Hyper-V guest VMs flip memory between private
> (encrypted) and shared (decrypted), it's no longer necessary to
> have separate code paths for mapping VMBus ring buffers for
> for normal VMs and for Confidential VMs.
> 
> As such, remove the code path that uses vmap_pfn(), and set
> the protection flags argument to vmap() to account for the
> difference between normal and Confidential VMs.
> 
> Signed-off-by: Michael Kelley<mikelley@...rosoft.com>
> ---

Reviewed-by: Tianyu Lan <Tianyu.Lan@...rosoft.com>