linux-kernel - Re: [PATCH v6 2/7] iommu/sva: Move PASID helpers to sva code

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Message-ID: <ZBh2LTrijOuTkOm9@nvidia.com>
Date:   Mon, 20 Mar 2023 12:05:17 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, iommu@...ts.linux.dev,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Robin Murphy <robin.murphy@....com>,
        Dave Hansen <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        X86 Kernel <x86@...nel.org>, bp@...en8.de,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>, corbet@....net,
        vkoul@...nel.org, dmaengine@...r.kernel.org,
        linux-doc@...r.kernel.org, Will Deacon <will@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Raj Ashok <ashok.raj@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>, Yi Liu <yi.l.liu@...el.com>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH v6 2/7] iommu/sva: Move PASID helpers to sva code

On Mon, Mar 13, 2023 at 01:41:53PM -0700, Jacob Pan wrote:
> Preparing to remove IOASID infrastructure, PASID management will be
> under SVA code. Decouple mm code from IOASID.
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> ---
> v6:
> 	- put helpers under iommu.h instead of iommu-helper.h
> v5:
> 	- move definition of helpers to iommu code to be consistent with
> 	  declarations. (Kevin)
> 	- fix patch partitioning bug (Baolu)
> v4:
> 	- delete and open code mm_set_pasid
> 	- keep mm_init_pasid() as inline for fork performance
> ---
>  drivers/iommu/iommu-sva.c | 10 +++++++++-
>  include/linux/ioasid.h    |  6 +-----
>  include/linux/iommu.h     | 14 +++++++++++++-
>  include/linux/sched/mm.h  | 26 --------------------------
>  kernel/fork.c             |  3 +++
>  5 files changed, 26 insertions(+), 33 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason