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@nvidia.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 d8c6bfde6a61..ec746c2a08ae 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -40,6 +40,7 @@
#include <linux/amba/bus.h> #include <linux/fsl/mc.h> +#include <linux/host1x_context_bus.h>
#include "arm-smmu.h"
@@ -2087,8 +2088,20 @@ 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);