linux-kernel - Re: [PATCH 06/12] swiotlb: Remove bounce buffer remapping for Hyper-V

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Date:   Mon, 24 Oct 2022 08:36:12 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Michael Kelley <mikelley@...rosoft.com>
Cc:     hpa@...or.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        sthemmin@...rosoft.com, wei.liu@...nel.org, decui@...rosoft.com,
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Subject: Re: [PATCH 06/12] swiotlb: Remove bounce buffer remapping for Hyper-V

On Thu, Oct 20, 2022 at 10:57:09AM -0700, Michael Kelley wrote:
> With changes to how Hyper-V guest VMs flip memory between private
> (encrypted) and shared (decrypted), creating a second kernel virtual
> mapping for shared memory is no longer necessary. Everything needed
> for the transition to shared is handled by set_memory_decrypted().
> 
> As such, remove swiotlb_unencrypted_base and the associated
> code.
> 
> Signed-off-by: Michael Kelley <mikelley@...rosoft.com>

I'm more than glad that we can kill this code:

Acked-by: Christoph Hellwig <hch@....de>