Commit cd9f07a9 authored Nov 12, 2014 by Mitchel Humpherys Committed by Patrick Daly Sep 07, 2016

iommu/arm-smmu: implement DOMAIN_ATTR_PT_BASE_ADDR using ttbr[0]



Some clients need to get the base address of the page table for a given
IOMMU domain.  This functionality is provided by the
DOMAIN_ATTR_PT_BASE_ADDR domain attribute.  Implement it in the ARM SMMU
driver by returning ttbr[0] from the page table config.

Change-Id: Ie9b0241c7c7df18b25761bae79c1be1a283ff3a4
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent 39e9c91a

drivers/iommu/arm-smmu.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1707,6 +1707,10 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
		case DOMAIN_ATTR_NESTING:
		(int )data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED);
		return 0;
		case DOMAIN_ATTR_PT_BASE_ADDR:
		((phys_addr_t )data) =
		smmu_domain->pgtbl_cfg.arm_lpae_s1_cfg.ttbr[0];
		return 0;
		default:
		return -ENODEV;
		}