Re: [Patch v3 00/12] Fix AMD IOMMU faults in kdump kernel

[Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

CC more people who is interested

On 01/26/16 at 06:29pm, Baoquan He wrote:
> This is v3 post. Now the situation is patchset test on amd-vi v2 machine
> is OK, however still some IO_PAGE_FAULT warning is printed out on v1
> machine. The log will be attached later.
> 
> I didn't figure out what caused the warning, so post them to ask for help.
> 
> The strategy is unchanged:
> 1) Copy old dev tables and old irq tables to kdump kernel
> 2) Insatll this newly copied DTE to iommu
> 3) Hold the updating of domain info to iommu dev, mainly the io page table
> 4) Update domain info to iommu dev as soon as dev is initialized
> 
> 
> Baoquan He (12):
>   iommu/amd: Use standard bitmap operation to set bitmap
>   iommu/amd: Detect pre enabled translation
>   iommu/amd: move dte irq macro defitions to amd_iommu_types.h
>   iommu/amd: add copy_irq_table function
>   iommu/amd: change IOMMU_PTE_P to IOMMU_PTE_V
>   iommu/amd: Clean up the useless IOMMU_PTE_U/IOMMU_PTE_FC
>   iommu/amd: Add function copy_dev_tables
>   iommu/amd: set the device table and re-enable event/cmd buffer
>   iommu/amd: Don't update the domain information to iommu dev before dev
>     init
>   iommu/amd: Update related domain info to dev when dev driver init
>   iommu/amd: No need to wait iommu completion if no dte irq entry change
>   iommu/amd: fix a code bug in do_attach
> 
>  drivers/iommu/amd_iommu.c       |  51 ++++++++------
>  drivers/iommu/amd_iommu_init.c  | 147 ++++++++++++++++++++++++++++++++++++----
>  drivers/iommu/amd_iommu_proto.h |   5 ++
>  drivers/iommu/amd_iommu_types.h |  14 ++--
>  4 files changed, 180 insertions(+), 37 deletions(-)
> 
> -- 
> 2.1.0
>