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| author |   Lu Baolu <baolu.lu@linux.intel.com> | 2019-05-25 13:41:25 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2019-05-28 10:19:07 +0200 |
| commit | d8190dc638866fe5811d4b45b3af6f34b3f5870f (patch) | |
| tree | 72083292e316aeba2f6b1100f124a74246d32e3b /drivers/iommu | |
| parent | iommu/vt-d: Expose ISA direct mapping region via iommu_get_resv_regions (diff) | |
| download | linux-dev-d8190dc638866fe5811d4b45b3af6f34b3f5870f.tar.xz linux-dev-d8190dc638866fe5811d4b45b3af6f34b3f5870f.zip | |
iommu/vt-d: Enable DMA remapping after rmrr mapped
The rmrr devices require identity map of the rmrr regions before
enabling DMA remapping. Otherwise, there will be a window during
which DMA from/to the rmrr regions will be blocked. In order to
alleviate this, we move enabling DMA remapping after all rmrr
regions get mapped.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index bc7cbe0a6ac6..1bd22511a542 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3510,11 +3510,6 @@ domains_done: ret = dmar_set_interrupt(iommu); if (ret) goto free_iommu; - - if (!translation_pre_enabled(iommu)) - iommu_enable_translation(iommu); - - iommu_disable_protect_mem_regions(iommu); } return 0; @@ -4902,7 +4897,6 @@ int __init intel_iommu_init(void) goto out_free_reserved_range; } up_write(&dmar_global_lock); - pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); #if defined(CONFIG_X86) && defined(CONFIG_SWIOTLB) swiotlb = 0; @@ -4925,6 +4919,16 @@ int __init intel_iommu_init(void) register_memory_notifier(&intel_iommu_memory_nb); cpuhp_setup_state(CPUHP_IOMMU_INTEL_DEAD, "iommu/intel:dead", NULL, intel_iommu_cpu_dead); + + /* Finally, we enable the DMA remapping hardware. */ + for_each_iommu(iommu, drhd) { + if (!translation_pre_enabled(iommu)) + iommu_enable_translation(iommu); + + iommu_disable_protect_mem_regions(iommu); + } + pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); + intel_iommu_enabled = 1; intel_iommu_debugfs_init(); |