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Commit 92ac4320 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

amd-iommu: add function to disable all iommus 



This function is required for suspend/resume support with AMD IOMMU
enabled.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent d91cecdd

arch/x86/kernel/amd_iommu_init.c

+13 −0
Original line number Diff line number Diff line
@@ -252,6 +252,11 @@ static void __init iommu_enable(struct amd_iommu *iommu) 
	iommu_feature_enable(iommu, CONTROL_IOMMU_EN);

}



static void iommu_disable(struct amd_iommu *iommu)

{

	iommu_feature_disable(iommu, CONTROL_IOMMU_EN);

}



/*

 * mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in

 * the system has one.
@@ -945,6 +950,14 @@ static void __init enable_iommus(void) 
	}

}



static void disable_iommus(void)

{

	struct amd_iommu *iommu;



	for_each_iommu(iommu)

		iommu_disable(iommu);

}



/*

 * Suspend/Resume support

 * disable suspend until real resume implemented