From mboxrd@z Thu Jan 1 00:00:00 1970 From: julien.grall@linaro.org (Julien Grall) Date: Thu, 20 Feb 2014 16:20:32 +0000 Subject: [PATCH 0/2] Avoid to use Xen DMA ops when the device is protected by an IOMMU Message-ID: <1392913234-25429-1-git-send-email-julien.grall@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 -- 1.7.10.4