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Ian Campbell
f01af57300
',' is a valid character in a device-tree path (see ePAPR v1.1 Table 2-1), in fact ',' is actually pretty common in node names. Using ',' as a separator breaks for example on fast models. If you use the full path (/smb/motherboard/iofpga@3,00000000/uart@090000) rather than the alias then earlyprintk gives: (XEN) Looking for UART console /smb/motherboard/iofpga@3 (XEN) Unable to find device "/smb/motherboard/iofpga@3" (XEN) Bad console= option 'dtuart' I actually noticed this on Jetson where the uart is "/serial@0,70006300" and there happened to be no alias defined. Instead use ':' as the separator, it is defined to terminate the path in the context of /chosen/stdout-path (Table 3-4) which is pretty closely analogous to the dtuart= option and so makes a pretty good choice (especially since the next patch adds support for stdout-path). Since no DT aware driver current supports any options there is no point in retaining support for ',' for backwards compatibility. Additionally, expand the buffer for the dtuart option, a path can be far longer than 30 characters (in fact the maximum size of a single node name is 31, so it's not even necessarily enough for an alias). 128 is completely arbitrary and allows for paths at least 8 deep even with worst case node names. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Julien Grall <julien.grall@linaro.org>
xen-bugtool =========== The xen-bugtool command line application will collate the Xen dmesg output, details of the hardware configuration of your machine, information about the build of Xen that you are using, plus, if you allow it, various logs. The information collated can either be posted to a Xen Bugzilla bug (this bug must already exist in the system, and you must be a registered user there), or it can be saved as a .tar.bz2 for sending or archiving. The collated logs may contain private information, and if you are at all worried about that, you should not use this tool, or you should explicitly exclude those logs from the archive. xen-bugtool is wholly interactive, so simply run it, and answer the questions.