From: Joerg Roedel <[email protected]> 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 <[email protected]> --- drivers/iommu/amd_iommu_init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index d9f5ddd..fb7035f 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2316,6 +2316,9 @@ 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(); -- 2.7.4 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
