diff options
| author | Joerg Roedel <joro@8bytes.org> | 2013-02-06 15:55:23 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 02:06:37 +0400 |
| commit | 0c8581863389e969dcbf6d9e79971435a1ecf554 (patch) | |
| tree | da637c63cd76fa341608655a54edd81ee706da61 | |
| parent | db6154ead40e0a568982ec4885cfa3fa89e67324 (diff) | |
| download | linux-0c8581863389e969dcbf6d9e79971435a1ecf554.tar.xz | |
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>
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index ef0ae93500f4..b573f803d84b 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; |