Commits
Alexey Kardashevskiy committed 4f7e0babbc7
powerpc/iommu: Allow bypass-only for DMA POWER8 and newer support a bypass mode which maps all host memory to PCI buses so an IOMMU table is not always required. However if we fail to create such a table, the DMA setup fails and the kernel does not boot. This skips the 32bit DMA setup check if the bypass is selected. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190718051139.74787-3-aik@ozlabs.ru