[PATCH v6 0/9] ACPI/IORT: Support for IORT RMR node

[Laurentiu Tudor]

On 7/16/2021 11:34 AM, Shameer Kolothum wrote:
> Hi,
> 
> Major Changes from v5:
> - Addressed comments from Robin & Lorenzo.
>   : Moved iort_parse_rmr() to acpi_iort_init() from
>     iort_init_platform_devices().
>   : Removed use of struct iort_rmr_entry during the initial
>     parse. Using struct iommu_resv_region instead.
>   : Report RMR address alignment and overlap errors, but continue.
>   : Reworked arm_smmu_init_bypass_stes() (patch # 6).
> - Updated SMMUv2 bypass SMR code. Thanks to Jon N (patch #8).
> - Set IOMMU protection flags(IOMMU_CACHE, IOMMU_MMIO) based
>   on Type of RMR region. Suggested by Jon N.
> 
> Sanity tested on a HiSilicon D06(SMMUv3). Further testing and
> feedback is greatly appreciated.
> 
> Thanks,
> Shameer
> 
> ------
> v4 --> v5
>  -Added a fw_data union to struct iommu_resv_region and removed
>   struct iommu_rmr (Based on comments from Joerg/Robin).
>  -Added iommu_put_rmrs() to release mem.
>  -Thanks to Steve for verifying on SMMUv2, but not added the Tested-by
>   yet because of the above changes.
> 
> v3 -->v4
> -Included the SMMUv2 SMR bypass install changes suggested by
>  Steve(patch #7)
> -As per Robin's comments, RMR reserve implementation is now
>  more generic  (patch #8) and dropped v3 patches 8 and 10.
> -Rebase to 5.13-rc1
> 
> RFC v2 --> v3
>  -Dropped RFC tag as the ACPICA header changes are now ready to be
>   part of 5.13[0]. But this series still has a dependency on that patch.
>  -Added IORT E.b related changes(node flags, _DSM function 5 checks for
>   PCIe).
>  -Changed RMR to stream id mapping from M:N to M:1 as per the spec and
>   discussion here[1].
>  -Last two patches add support for SMMUv2(Thanks to Jon Nettleton!)
> ------
> 
> Jon Nettleton (1):
>   iommu/arm-smmu: Get associated RMR info and install bypass SMR
> 
> Shameer Kolothum (8):
>   iommu: Introduce a union to struct iommu_resv_region
>   ACPI/IORT: Add support for RMR node parsing
>   iommu/dma: Introduce generic helper to retrieve RMR info
>   ACPI/IORT: Add a helper to retrieve RMR memory regions
>   iommu/arm-smmu-v3: Introduce strtab init helper
>   iommu/arm-smmu-v3: Refactor arm_smmu_init_bypass_stes() to force
>     bypass
>   iommu/arm-smmu-v3: Get associated RMR info and install bypass STE
>   iommu/dma: Reserve any RMR regions associated with a dev
> 
>  drivers/acpi/arm64/iort.c                   | 172 +++++++++++++++++++-
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |  76 +++++++--
>  drivers/iommu/arm/arm-smmu/arm-smmu.c       |  48 ++++++
>  drivers/iommu/dma-iommu.c                   |  89 +++++++++-
>  include/linux/acpi_iort.h                   |   7 +
>  include/linux/dma-iommu.h                   |  13 ++
>  include/linux/iommu.h                       |  11 ++
>  7 files changed, 393 insertions(+), 23 deletions(-)
>
Validated on a NXP LX2160A with SMMUv2, so:

Tested-by: Laurentiu Tudor <laurentiu.tudor at nxp.com>

---
Thanks & Best Regards, Laurentiu