diff options
| -rw-r--r-- | Documentation/x86_64/boot-options.txt | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/pci-dma.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index e97a4c8fe6ea..74b77f9e91bc 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -203,6 +203,7 @@ IOMMU When off all DMA over >4GB is forced through an IOMMU or bounce buffering. nodac Forbid DMA >4GB + panic Always panic when IOMMU overflows swiotlb=pages[,force] diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c index 58be7929b4e2..f8d857453f8a 100644 --- a/arch/x86_64/kernel/pci-dma.c +++ b/arch/x86_64/kernel/pci-dma.c @@ -245,6 +245,7 @@ EXPORT_SYMBOL(dma_set_mask); noaperture Don't touch the aperture for AGP. allowdac Allow DMA >4GB nodac Forbid DMA >4GB + panic Force panic when IOMMU overflows */ __init int iommu_setup(char *p) { |