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amd-iommu: add function to disable all iommus 

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
hifive-unleashed-5.1
Joerg Roedel 2009-05-19 19:06:27 +02:00
parent d91cecdd79
commit 92ac4320af
1 changed files with 13 additions and 0 deletions
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13
arch/x86/kernel/amd_iommu_init.c
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@ -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