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authorJoerg Roedel <joro@8bytes.org>2013-02-06 12:55:23 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-04 06:06:37 +0800
commit0c8581863389e969dcbf6d9e79971435a1ecf554 (patch)
treeda637c63cd76fa341608655a54edd81ee706da61 /drivers/iommu
parentdb6154ead40e0a568982ec4885cfa3fa89e67324 (diff)
iommu/amd: Initialize device table after dma_ops
commit f528d980c17b8714aedc918ba86e058af914d66b upstream. When dma_ops are initialized the unity mappings are created. The init_device_table_dma() function makes sure DMA from all devices is blocked by default. This opens a short window in time where DMA to unity mapped regions is blocked by the IOMMU. Make sure this does not happen by initializing the device table after dma_ops. Signed-off-by: Joerg Roedel <joro@8bytes.org> Signed-off-by: Shuah Khan <shuah.khan@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu_init.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index ef0ae93500f..b573f803d84 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1572,8 +1572,6 @@ int __init amd_iommu_init_hardware(void)
if (amd_iommu_pd_alloc_bitmap == NULL)
goto free;
- /* init the device table */
- init_device_table();
/*
* let all alias entries point to itself
@@ -1655,6 +1653,7 @@ out:
*/
static int __init amd_iommu_init(void)
{
+ struct amd_iommu *iommu;
int ret = 0;
ret = amd_iommu_init_hardware();
@@ -1673,6 +1672,12 @@ static int __init amd_iommu_init(void)
if (ret)
goto free;
+ /* init the device table */
+ init_device_table();
+
+ for_each_iommu(iommu)
+ iommu_flush_all_caches(iommu);
+
amd_iommu_init_api();
x86_platform.iommu_shutdown = disable_iommus;