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iommu/vt-d: Don't disable translation prior to OS handover 

For all the copy-translation code to run, we have to keep
translation enabled in intel_iommu_init(). So remove the
code disabling it.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-06-12 12:44:33 +02:00
parent c3361f2f6e
commit 60b523ecfe
1 changed files with 0 additions and 7 deletions
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7
drivers/iommu/intel-iommu.c
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@ -4484,13 +4484,6 @@ int __init intel_iommu_init(void)
goto out_free_dmar; goto out_free_dmar;
} }
/*
* Disable translation if already enabled prior to OS handover.
*/
for_each_active_iommu(iommu, drhd)
if (iommu->gcmd & DMA_GCMD_TE)
iommu_disable_translation(iommu);
if (dmar_dev_scope_init() < 0) { if (dmar_dev_scope_init() < 0) {
if (force_on) if (force_on)
panic("tboot: Failed to initialize DMAR device scope\n"); panic("tboot: Failed to initialize DMAR device scope\n");