From 60b523ecfede05796aa77024b3960fecabab4de7 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Fri, 12 Jun 2015 12:44:33 +0200 Subject: [PATCH] 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 Tested-by: Baoquan He Signed-off-by: Joerg Roedel --- drivers/iommu/intel-iommu.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index ca7d37c3981f..e40c858a84fe 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4484,13 +4484,6 @@ int __init intel_iommu_init(void) 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 (force_on) panic("tboot: Failed to initialize DMAR device scope\n"); -- 2.39.2