1 files changed, 13 insertions, 0 deletions

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 092f019e033a..2a3dfbd5e677 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 && PCI
+        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