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-rw-r--r--drivers/thunderbolt/Kconfig58
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diff --git a/drivers/thunderbolt/Kconfig b/drivers/thunderbolt/Kconfig
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+++ b/drivers/thunderbolt/Kconfig
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+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig USB4
+ tristate "Unified support for USB4 and Thunderbolt"
+ depends on PCI
+ select APPLE_PROPERTIES if EFI_STUB && X86
+ select CRC32
+ select CRYPTO
+ select CRYPTO_HASH
+ select NVMEM
+ help
+ USB4 and Thunderbolt driver. USB4 is the public specification
+ based on the Thunderbolt 3 protocol. This driver is required if
+ you want to hotplug Thunderbolt and USB4 compliant devices on
+ Apple hardware or on PCs with Intel Falcon Ridge or newer.
+
+ To compile this driver a module, choose M here. The module will be
+ called thunderbolt.
+
+if USB4
+
+config USB4_DEBUGFS_WRITE
+ bool "Enable write by debugfs to configuration spaces (DANGEROUS)"
+ help
+ Enables writing to device configuration registers through
+ debugfs interface.
+
+ Only enable this if you know what you are doing! Never enable
+ this for production systems or distro kernels.
+
+config USB4_DEBUGFS_MARGINING
+ bool "Expose receiver lane margining operations under USB4 ports (DANGEROUS)"
+ depends on DEBUG_FS
+ depends on USB4_DEBUGFS_WRITE
+ help
+ Enables hardware and software based receiver lane margining support
+ under each USB4 port. Used for electrical quality and robustness
+ validation during manufacturing. Should not be enabled by distro
+ kernels.
+
+config USB4_KUNIT_TEST
+ bool "KUnit tests" if !KUNIT_ALL_TESTS
+ depends on USB4 && KUNIT=y
+ default KUNIT_ALL_TESTS
+
+config USB4_DMA_TEST
+ tristate "DMA traffic test driver"
+ depends on DEBUG_FS
+ help
+ This allows sending and receiving DMA traffic through loopback
+ connection. Loopback connection can be done by either special
+ dongle that has TX/RX lines crossed, or by simply connecting a
+ cable back to the host. Only enable this if you know what you
+ are doing. Normal users and distro kernels should say N here.
+
+ To compile this driver a module, choose M here. The module will be
+ called thunderbolt_dma_test.
+
+endif # USB4