diff options
| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-07-25 02:29:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-26 16:18:41 +0200 |
| commit | 5c05917e7fe313a187ad6ebb94c1c6cf42862a0b (patch) | |
| tree | 0b8b59cdfb31016873ad8980d3381c1e5e2200d1 /arch/x86/Kconfig.debug | |
| parent | usb: move ehci reg def (diff) | |
| download | linux-5c05917e7fe313a187ad6ebb94c1c6cf42862a0b.tar.xz linux-5c05917e7fe313a187ad6ebb94c1c6cf42862a0b.zip | |
x86: usb debug port early console, v4
based on work from Eric, and add some timeout so don't dead loop when debug
device is not installed
v2: fix checkpatch warning
v3: move ehci struct def to linux/usrb/ehci_def.h from host/ehci.h
also add CONFIG_EARLY_PRINTK_DBGP to disable it by default
v4: address comments from Ingo, seperate ehci reg def moving to another patch
also add auto detect port that connect to debug device for Nvidia
southbridge
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: "Arjan van de Ven" <arjan@infradead.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Greg KH" <greg@kroah.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 092f019e033a..93422d2ecf61 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -43,6 +43,19 @@ config EARLY_PRINTK with klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. +config EARLY_PRINTK_DBGP + bool "Early printk via EHCI debug port" + default n + depends on EARLY_PRINTK + help + Write kernel log output directly into the EHCI debug port. + + This is useful for kernel debugging when your machine crashes very + early before the console code is initialized. For normal operation + it is not recommended because it looks ugly and doesn't cooperate + with klogd/syslogd or the X server. You should normally N here, + unless you want to debug such a crash. You need usb debug device. + config DEBUG_STACKOVERFLOW bool "Check for stack overflows" depends on DEBUG_KERNEL |