[PATCH 0/7] iommu/amd: Disable previously enabled IOMMUs at boot

From: Joerg Roedel
Date: Fri Jun 16 2017 - 10:11:49 EST


here is a patch-set refactoring the AMD IOMMU init code a
bit to make sure the IOMMUs get disabled at boot, even when
amd_iommu=off is specified on the kernel command line.

The patch-set is tested with various combinations of kernel
command-line parameters and with kexec. It applies to the
x86/amd branch of the iommu-tree.



Joerg Roedel (7):
iommu/amd: Disable IOMMUs at boot if they are enabled
iommu/amd: Rename free_on_init_error()
iommu/amd: Add new init-state IOMMU_CMDLINE_DISABLED
iommu/amd: Check for error states first in iommu_go_to_state()
iommu/amd: Set global pointers to NULL after freeing them
iommu/amd: Free IOMMU resources when disabled on command line
iommu/amd: Remove amd_iommu_disabled check from amd_iommu_detect()

drivers/iommu/amd_iommu_init.c | 33 ++++++++++++++++++++++++---------
1 file changed, 24 insertions(+), 9 deletions(-)