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Date: Mon, 16 May 2022 11:52:54 +0300 From: cyndis@...si.fi To: thierry.reding@...il.com, jonathanh@...dia.com, joro@...tes.org, will@...nel.org, robin.murphy@....com, robh+dt@...nel.org, krzysztof.kozlowski@...onical.com Cc: linux-tegra@...r.kernel.org, dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Mikko Perttunen <mperttunen@...dia.com> Subject: [PATCH v5 5/9] iommu/arm-smmu: Attach to host1x context device bus From: Mikko Perttunen <mperttunen@...dia.com> Set itself as the IOMMU for the host1x context device bus, containing "dummy" devices used for Host1x context isolation. Signed-off-by: Mikko Perttunen <mperttunen@...dia.com> --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index 568cce590ccc..9ff54eaecf81 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -39,6 +39,7 @@ #include <linux/amba/bus.h> #include <linux/fsl/mc.h> +#include <linux/host1x_context_bus.h> #include "arm-smmu.h" @@ -2053,8 +2054,20 @@ static int arm_smmu_bus_init(struct iommu_ops *ops) goto err_reset_pci_ops; } #endif +#ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS + if (!iommu_present(&host1x_context_device_bus_type)) { + err = bus_set_iommu(&host1x_context_device_bus_type, ops); + if (err) + goto err_reset_fsl_mc_ops; + } +#endif + return 0; +err_reset_fsl_mc_ops: __maybe_unused; +#ifdef CONFIG_FSL_MC_BUS + bus_set_iommu(&fsl_mc_bus_type, NULL); +#endif err_reset_pci_ops: __maybe_unused; #ifdef CONFIG_PCI bus_set_iommu(&pci_bus_type, NULL); -- 2.36.1
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