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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-05-19 19:06:27 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-05-28 18:09:26 +0200 |
| commit | 92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7 (patch) | |
| tree | dc77e4dfbac57240dadf05dc5b1589d511bce80a /arch/x86/kernel/amd_iommu_init.c | |
| parent | d91cecdd796c27df46339e80ed436a980c56fcad (diff) | |
| download | lwn-92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7.tar.gz lwn-92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
| -rw-r--r-- | 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 feee475e6264..ed10c0f5ff77 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 |