On Thu, 14 Dec 2017 16:09:55 +0000,
Shameer Kolothum wrote:
>
> On some platforms msi parent address regions have to be excluded from
> normal IOVA allocation in that they are detected and decoded in a HW
> specific way by system components and so they cannot be considered normal
> IOVA address space.
>
> Add a helper function that retrieves ITS address regions - the msi
> parent - through IORT device <-> ITS mappings and reserves it so that
> these regions will not be translated by IOMMU and will be excluded from
> IOVA allocations. The function checks for the smmu model number and
> only applies the msi reservation if the platform requires it.
>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
> ---
> drivers/acpi/arm64/iort.c | 111
> +++++++++++++++++++++++++++++++++++++--
> drivers/irqchip/irq-gic-v3-its.c | 3 +-
> include/linux/acpi_iort.h | 7 ++-
> 3 files changed, 116 insertions(+), 5 deletions(-)
For the ITS part:
Reviewed-by: Marc Zyngier <marc.zyng...@arm.com>
M.
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