CONFIG_IA64_HP_ZX1_SWIOTLB is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64
HP-zx1/sx1000 with software I/O TLB
modulename: hwsw_iommu.ko
configname: CONFIG_IA64_HP_ZX1_SWIOTLB
System type
└─>HP-zx1/sx1000 with software I/O TLB
In linux kernel since version 2.6.12
Build a kernel that runs on HP zx1 and sx1000 systems even when they
have broken PCI devices which cannot DMA to full 32 bits. Apart
from support for the HP I/O MMU, this includes support for the software
I/O TLB, which allows supporting the broken devices at the expense of
wasting some kernel memory (about 2MB by default).
have broken PCI devices which cannot DMA to full 32 bits. Apart
from support for the HP I/O MMU, this includes support for the software
I/O TLB, which allows supporting the broken devices at the expense of
wasting some kernel memory (about 2MB by default).