linux-kernel - Re: [PATCH v2 0/4] iommu: Add device fault reporting API

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Date:   Mon, 3 Jun 2019 14:59:51 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Jean-Philippe Brucker <jean-philippe.brucker@....com>
Cc:     joro@...tes.org, alex.williamson@...hat.com, eric.auger@...hat.com,
        ashok.raj@...el.com, yi.l.liu@...el.com, robdclark@...il.com,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        robin.murphy@....com, jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v2 0/4] iommu: Add device fault reporting API

On Mon,  3 Jun 2019 15:57:45 +0100
Jean-Philippe Brucker <jean-philippe.brucker@....com> wrote:

> Allow device drivers and VFIO to get notified on IOMMU translation
> fault, and handle recoverable faults (PCI PRI). Several series require
> this API (Intel VT-d and Arm SMMUv3 nested support, as well as the
> generic host SVA implementation).
> 
> Changes since v1 [1]:
> * Allocate iommu_param earlier, in iommu_probe_device().
> * Pass struct iommu_fault to fault handlers, instead of the
>   iommu_fault_event wrapper.
> * Removed unused iommu_fault_event::iommu_private.
> * Removed unnecessary iommu_page_response::addr.
> * Added iommu_page_response::version, which would allow to introduce a
>   new incompatible iommu_page_response structure (as opposed to just
>   adding a flag + field).
> 
> [1] [PATCH 0/4] iommu: Add device fault reporting API
>     https://lore.kernel.org/lkml/20190523180613.55049-1-jean-philippe.brucker@arm.com/
> 
> Jacob Pan (3):
>   driver core: Add per device iommu param
>   iommu: Introduce device fault data
>   iommu: Introduce device fault report API
> 
> Jean-Philippe Brucker (1):
>   iommu: Add recoverable fault reporting
> 
This interface meet the need for vt-d, just one more comment on 2/4. Do
you want to add Co-developed-by you for the three patches from me?

Thanks,

Jacob

>  drivers/iommu/iommu.c      | 236
> ++++++++++++++++++++++++++++++++++++- include/linux/device.h     |
> 3 + include/linux/iommu.h      |  87 ++++++++++++++
>  include/uapi/linux/iommu.h | 153 ++++++++++++++++++++++++
>  4 files changed, 476 insertions(+), 3 deletions(-)
>  create mode 100644 include/uapi/linux/iommu.h
>