diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-11-13 08:18:34 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-15 10:36:59 +0100 |
| commit | 90dc392fc445ee2fc17c2617e306774b269386ac (patch) | |
| tree | 5256af5e96abc028f818ca3f47184ad0a32aed3c /arch/x86/Kconfig | |
| parent | 44eb5a7e5dc6f23d04c05c15f91bc279e0dc700d (diff) | |
x86: Remove the calgary IOMMU driver
The calgary IOMMU was only used on high-end IBM systems in the early
x86_64 age and has no known users left. Remove it to avoid having to
touch it for pending changes to the DMA API.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191113071836.21041-2-hch@lst.de
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index d6e1faa28c58..4d27bdc85bf2 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -932,36 +932,6 @@ config GART_IOMMU If unsure, say Y. -config CALGARY_IOMMU - bool "IBM Calgary IOMMU support" - select IOMMU_HELPER - select SWIOTLB - depends on X86_64 && PCI - ---help--- - Support for hardware IOMMUs in IBM's xSeries x366 and x460 - systems. Needed to run systems with more than 3GB of memory - properly with 32-bit PCI devices that do not support DAC - (Double Address Cycle). Calgary also supports bus level - isolation, where all DMAs pass through the IOMMU. This - prevents them from going anywhere except their intended - destination. This catches hard-to-find kernel bugs and - mis-behaving drivers and devices that do not use the DMA-API - properly to set up their DMA buffers. The IOMMU can be - turned off at boot time with the iommu=off parameter. - Normally the kernel will make the right choice by itself. - If unsure, say Y. - -config CALGARY_IOMMU_ENABLED_BY_DEFAULT - def_bool y - prompt "Should Calgary be enabled by default?" - depends on CALGARY_IOMMU - ---help--- - Should Calgary be enabled by default? if you choose 'y', Calgary - will be used (if it exists). If you choose 'n', Calgary will not be - used even if it exists. If you choose 'n' and would like to use - Calgary anyway, pass 'iommu=calgary' on the kernel command line. - If unsure, say Y. - config MAXSMP bool "Enable Maximum number of SMP Processors and NUMA Nodes" depends on X86_64 && SMP && DEBUG_KERNEL |