Commit-ID: 92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7
Gitweb: http://git.kernel.org/tip/92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Tue, 19 May 2009 19:06:27 +0200
Committer: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Thu, 28 May 2009 18:09:26 +0200
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@xxxxxxx>
---
arch/x86/kernel/amd_iommu_init.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index feee475..ed10c0f 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -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
--
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