diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-08-05 02:19:08 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-08-05 02:19:08 -0300 |
commit | 8dec7c70575785729a6a9e6719a955e9c545bcab (patch) | |
tree | 897b1b743b2ceb44ace956e8176b6a7e36751019 /drivers/iommu/intel-iommu.c | |
parent | 4411a04f871d94ae997fb7262a428fe2ee988eb3 (diff) |
Linux-libre 4.6.5-gnupck-4.6.5-gnu
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
-rw-r--r-- | drivers/iommu/intel-iommu.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index e1852e845..ae364e078 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3169,11 +3169,6 @@ static int __init init_dmars(void) } } - 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; #ifdef CONFIG_INTEL_IOMMU_SVM @@ -3182,6 +3177,18 @@ static int __init init_dmars(void) #endif } + /* + * Now that qi is enabled on all iommus, set the root entry and flush + * caches. This is required on some Intel X58 chipsets, otherwise the + * flush_context function will loop forever and the boot hangs. + */ + for_each_active_iommu(iommu, drhd) { + 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 (iommu_pass_through) iommu_identity_mapping |= IDENTMAP_ALL; |