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.thodi@xxxxxxxxxx> > --- > 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.zyngier@xxxxxxx> M. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
