Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6

[mirror_ubuntu-bionic-kernel.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index c4ecb2994ba3855110cdb596b6500a99b2404b24..89f4035b526c147de3115794fa2cbd55b25db8ab 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -494,6 +494,30 @@ config RCU_TORTURE_TEST
          Say M if you want the RCU torture tests to build as a module.
          Say N if you are unsure.
 
+config KPROBES_SANITY_TEST
+       bool "Kprobes sanity tests"
+       depends on DEBUG_KERNEL
+       depends on KPROBES
+       default n
+       help
+         This option provides for testing basic kprobes functionality on
+         boot. A sample kprobe, jprobe and kretprobe are inserted and
+         verified for functionality.
+
+         Say N if you are unsure.
+
+config BACKTRACE_SELF_TEST
+       tristate "Self test for the backtrace code"
+       depends on DEBUG_KERNEL
+       default n
+       help
+         This option provides a kernel module that can be used to test
+         the kernel stack backtrace code. This option is not useful
+         for distributions or general kernels, but only for kernel
+         developers working on architecture code.
+
+         Say N if you are unsure.
+
 config LKDTM
        tristate "Linux Kernel Dump Test Tool Module"
        depends on DEBUG_KERNEL
@@ -562,5 +586,33 @@ config LATENCYTOP
          Enable this option if you want to use the LatencyTOP tool
          to find out which userspace is blocking on what kernel operations.
 
+config PROVIDE_OHCI1394_DMA_INIT
+       bool "Provide code for enabling DMA over FireWire early on boot"
+       depends on PCI && X86
+       help
+         If you want to debug problems which hang or crash the kernel early
+         on boot and the crashing machine has a FireWire port, you can use
+         this feature to remotely access the memory of the crashed machine
+         over FireWire. This employs remote DMA as part of the OHCI1394
+         specification which is now the standard for FireWire controllers.
+
+         With remote DMA, you can monitor the printk buffer remotely using
+         firescope and access all memory below 4GB using fireproxy from gdb.
+         Even controlling a kernel debugger is possible using remote DMA.
+
+         Usage:
+
+         If ohci1394_dma=early is used as boot parameter, it will initialize
+         all OHCI1394 controllers which are found in the PCI config space.
+
+         As all changes to the FireWire bus such as enabling and disabling
+         devices cause a bus reset and thereby disable remote DMA for all
+         devices, be sure to have the cable plugged and FireWire enabled on
+         the debugging host before booting the debug target for debugging.
+
+         This code (~1k) is freed after boot. By then, the firewire stack
+         in charge of the OHCI-1394 controllers should be used instead.
+
+         See Documentation/debugging-via-ohci1394.txt for more information.
 
 source "samples/Kconfig"