Commit 11123741 authored Jun 16, 2017 by Joerg Roedel

iommu/amd: Disable IOMMUs at boot if they are enabled



When booting, make sure the IOMMUs are disabled. They could
be previously enabled if we boot into a kexec or kdump
kernel. So make sure they are off.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 54bd6357

drivers/iommu/amd_iommu_init.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2318,6 +2318,9 @@ static int __init early_amd_iommu_init(void)
		if (ret)
		goto out;

		/* Disable any previously enabled IOMMUs */
		disable_iommus();

		if (amd_iommu_irq_remap)
		amd_iommu_irq_remap = check_ioapic_information();