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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-10-15 17:58:58 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-10-15 17:58:58 +0300 |
| commit | 6e20c253608b0ba2876c1aabe95f885d7000e9b4 (patch) | |
| tree | 3f6b20b14c4a3f8351ccccf03cd5106f46415f61 /drivers/thunderbolt/Kconfig | |
| parent | 442f10325b03f41029170b8150eb8714a96b4291 (diff) | |
| parent | 20ef35f70a8e49809b248df3f8e05fdd53753534 (diff) | |
Merge remote-tracking branch 'drm_intel_push/topic/core-for-CI' into drm-tip
Diffstat (limited to 'drivers/thunderbolt/Kconfig')
| -rw-r--r-- | drivers/thunderbolt/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/thunderbolt/Kconfig b/drivers/thunderbolt/Kconfig index 0abdb69ee9f4..8bf4ecf7f76e 100644 --- a/drivers/thunderbolt/Kconfig +++ b/drivers/thunderbolt/Kconfig @@ -18,6 +18,24 @@ menuconfig USB4 if USB4 +config USB4_PCIE_TUNNELING + bool "Allow PCI Express tunneling over USB4 fabric" + depends on PCI + default y + help + USB4 and Thunderbolt devices typically include PCIe switch + with a number of PCIe endpoints such as USB host controllers, + GPUs and network adapters. These are made available to the + host system through PCIe tunneling. These can use DMA and + therefore have access to the host memory which is typically + guarded by an IOMMU. This option allows disabling PCIe + tunneling completely. + + For devices to be usable it is recommended to say Y here. + + Note this only works with systems that use Software Based + Connection Manager (this is most USB4 hosts). + config USB4_DEBUGFS_WRITE bool "Enable write by debugfs to configuration spaces (DANGEROUS)" help |