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| author | Jan Beulich <jbeulich@suse.com> | 2012-09-11 15:49:52 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2012-09-11 15:49:52 +0200 |
| commit | 322ecbe4ac85d4d9d11f50240ef6e5291fbbf440 (patch) | |
| tree | 829a3a1f022acc43d8e9bcdb04c10b06e2312970 /docs/misc | |
| parent | af844567f069cfd53ade32c1fcdf8582865129d1 (diff) | |
| download | xen-322ecbe4ac85d4d9d11f50240ef6e5291fbbf440.tar.gz xen-322ecbe4ac85d4d9d11f50240ef6e5291fbbf440.tar.bz2 xen-322ecbe4ac85d4d9d11f50240ef6e5291fbbf440.zip | |
console: add EHCI debug port based serial console
Low level hardware interface pieces adapted from Linux.
For setup information, see Linux'es Documentation/x86/earlyprintk.txt
and/or http://www.coreboot.org/EHCI_Debug_Port.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'docs/misc')
| -rw-r--r-- | docs/misc/xen-command-line.markdown | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown index 92fa8fcd26..e70b722500 100644 --- a/docs/misc/xen-command-line.markdown +++ b/docs/misc/xen-command-line.markdown @@ -244,7 +244,7 @@ A typical setup for most situations might be `com1=115200,8n1` Specify the size of the console ring buffer. ### console -> `= List of [ vga | com1[H,L] | com2[H,L] | none ]` +> `= List of [ vga | com1[H,L] | com2[H,L] | dbgp | none ]` > Default: `console=com1,vga` @@ -260,6 +260,8 @@ the converse; transmitted and received characters will have their MSB cleared. This allows a single port to be shared by two subsystems (e.g. console and debugger). +`dbgp` indicates that Xen should use a USB debug port. + `none` indicates that Xen should not use a console. This option only makes sense on its own. @@ -352,6 +354,12 @@ combination with the `low_crashinfo` command line option. ### credit2\_load\_window\_shift > `= <integer>` +### dbgp +> `= ehci[ <integer> | @pci<bus>:<slot>.<func> ]` + +Specify the USB controller to use, either by instance number (when going +over the PCI busses sequentially) or by PCI device (must be on segment 0). + ### debug\_stack\_lines > `= <integer>` |