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| author | Joerg Roedel <jroedel@suse.de> | 2015-06-12 09:18:53 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-06-16 10:59:34 +0200 |
| commit | 5f0a7f7614a9d99325ac8d618f1cdf7a3014287c (patch) | |
| tree | 6fec61fe80852313b1309f69c4afaa79dc64d46a /drivers/iommu/intel-iommu.c | |
| parent | iommu/vt-d: Init QI before root entry is allocated (diff) | |
| download | linux-5f0a7f7614a9d99325ac8d618f1cdf7a3014287c.tar.xz linux-5f0a7f7614a9d99325ac8d618f1cdf7a3014287c.zip | |
iommu/vt-d: Make root entry visible for hardware right after allocation
In case there was an old root entry, make our new one
visible immediately after it was allocated.
Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 989761c8f017..bf3e450b5b97 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2817,6 +2817,12 @@ static int __init init_dmars(void) ret = iommu_alloc_root_entry(iommu); if (ret) goto free_iommu; + + iommu_flush_write_buffer(iommu); + iommu_set_root_entry(iommu); + iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); + iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); + if (!ecap_pass_through(iommu->ecap)) hw_pass_through = 0; } @@ -2893,10 +2899,6 @@ static int __init init_dmars(void) if (ret) goto free_iommu; - iommu_set_root_entry(iommu); - - iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); - iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); iommu_enable_translation(iommu); iommu_disable_protect_mem_regions(iommu); } |