linux-kernel - Re: [PATCH v2 3/5] mm: Add structure to keep sva information

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Date:   Thu, 31 Aug 2023 10:45:17 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     Tina Zhang <tina.zhang@...el.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Kevin Tian <kevin.tian@...el.com>,
        Michael Shavit <mshavit@...gle.com>
Cc:     baolu.lu@...ux.intel.com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/5] mm: Add structure to keep sva information

On 2023/8/27 16:43, Tina Zhang wrote:
> Introduce iommu_mm_data structure to keep sva information (pasid and the
> related sva domains). Add iommu_mm pointer, pointing to an instance of
> iommu_mm_data structure, to mm.
> 
> Signed-off-by: Tina Zhang<tina.zhang@...el.com>
> ---
>   include/linux/iommu.h    | 5 +++++
>   include/linux/mm_types.h | 2 ++
>   2 files changed, 7 insertions(+)

Nit:

iommu also has a per-device private pointer, it's defined as struct
dev_iommu and stored at dev->iommu. Is it valuable to align both?

Best regards,
baolu