Commit 20b46dff authored Aug 09, 2017 by Baoquan He Committed by Joerg Roedel Aug 15, 2017

iommu/amd: Disable iommu only if amd_iommu=off is specified



It's ok to disable iommu early in normal kernel or in kdump kernel when
amd_iommu=off is specified. While we should not disable it in kdump kernel
when on-flight dma is still on-going.

Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent daae2d25

drivers/iommu/amd_iommu_init.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2499,6 +2499,7 @@ static int __init early_amd_iommu_init(void)
		goto out;

		/* Disable any previously enabled IOMMUs */
		if (!is_kdump_kernel() \|\| amd_iommu_disabled)
		disable_iommus();

		if (amd_iommu_irq_remap)