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| author | Joerg Roedel <joro@8bytes.org> | 2013-02-06 12:55:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 06:09:03 +0800 |
| commit | ffbf1423cc7e8ed018d0ba8fbe3f9f3bb816fa4c (patch) | |
| tree | 878215e4c8bf88447ecf4790295e8ecb0f0fb4ee /arch/x86 | |
| parent | 1adbb5db21a1e08537061607abc9b0a9e7e12848 (diff) | |
| download | kernel_samsung_aries-ffbf1423cc7e8ed018d0ba8fbe3f9f3bb816fa4c.zip kernel_samsung_aries-ffbf1423cc7e8ed018d0ba8fbe3f9f3bb816fa4c.tar.gz kernel_samsung_aries-ffbf1423cc7e8ed018d0ba8fbe3f9f3bb816fa4c.tar.bz2 | |
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 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/amd_iommu_init.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 33df6e8..d86aa3f 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -1363,6 +1363,7 @@ static struct syscore_ops amd_iommu_syscore_ops = { */ static int __init amd_iommu_init(void) { + struct amd_iommu *iommu; int i, ret = 0; /* @@ -1411,9 +1412,6 @@ static int __init amd_iommu_init(void) if (amd_iommu_pd_alloc_bitmap == NULL) goto free; - /* init the device table */ - init_device_table(); - /* * let all alias entries point to itself */ @@ -1463,6 +1461,12 @@ static int __init amd_iommu_init(void) if (ret) goto free_disable; + /* init the device table */ + init_device_table(); + + for_each_iommu(iommu) + iommu_flush_all_caches(iommu); + amd_iommu_init_api(); amd_iommu_init_notifier(); |