linux-kernel - Re: [PATCH v2 0/4] iommu/iova: Add CPU hotplug handler to flush rcaches to core code

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Message-ID: <20210325175354.GE15504@willie-the-truck>
Date:   Thu, 25 Mar 2021 17:53:54 +0000
From:   Will Deacon <will@...nel.org>
To:     John Garry <john.garry@...wei.com>
Cc:     joro@...tes.org, dwmw2@...radead.org, baolu.lu@...ux.intel.com,
        robin.murphy@....com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, linuxarm@...wei.com
Subject: Re: [PATCH v2 0/4] iommu/iova: Add CPU hotplug handler to flush
 rcaches to core code

On Thu, Mar 25, 2021 at 08:29:57PM +0800, John Garry wrote:
> The Intel IOMMU driver supports flushing the per-CPU rcaches when a CPU is
> offlined.
> 
> Let's move it to core code, so everyone can take advantage.
> 
> Also throw in a patch to stop exporting free_iova_fast().
> 
> Differences to v1:
> - Add RB tags (thanks!)
> - Add patch to stop exporting free_iova_fast()
> - Drop patch to correct comment
> - Add patch to delete iommu_dma_free_cpu_cached_iovas() and associated
>   changes
> 
> John Garry (4):
>   iova: Add CPU hotplug handler to flush rcaches
>   iommu/vt-d: Remove IOVA domain rcache flushing for CPU offlining
>   iommu: Delete iommu_dma_free_cpu_cached_iovas()
>   iommu: Stop exporting free_iova_fast()

Looks like this is all set for 5.13, so hopefully Joerg can stick it in
-next for a bit more exposure.

Will