Hello all
This small patch series allows Xen guest to be used when Xen is programming
the IOMMUs.
For this purpose, I have added a new optional property "protected-devices" which
list the devices protected by an IOMMU.
The first patch create a new helper which will contain Xen specific check
to know if we might need to use swiotlb-xen. The second patch is implementing
the goal of this patch series.
Regards,
Julien Grall (2):
arm/xen: Introduce need_xen_dma_ops and use it in get_dma_ops
arm/xen: Don't use xen DMA ops when the device is protected by an
IOMMU
Documentation/devicetree/bindings/arm/xen.txt | 2 +
arch/arm/include/asm/dma-mapping.h | 5 +-
arch/arm/include/asm/xen/dma-mapping.h | 22 ++++++++
arch/arm/include/asm/xen/hypervisor.h | 2 -
arch/arm/xen/enlighten.c | 75 +++++++++++++++++++++++++
5 files changed, 101 insertions(+), 5 deletions(-)
create mode 100644 arch/arm/include/asm/xen/dma-mapping.h
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1.7.10.4