On Sat, Oct 3, 2015 at 4:28 PM, Gabriel L. Somlo <somlo@cmu.edu> wrote:
From: Gabriel Somlo <somlo@cmu.edu>
Make fw_cfg entries of type "file" available via sysfs. Entries are listed under /sys/firmware/qemu_fw_cfg/by_key, in folders named after each entry's selector key. Filename, selector value, and size read-only attributes are included for each entry. Also, a "raw" attribute allows retrieval of the full binary content of each entry.
This patch also provides a documentation file outlining the guest-side "hardware" interface exposed by the QEMU fw_cfg device.
What's the status of "by_name"? There's a single (presumably incorrect) mention of it in a comment in this patch. I would prefer if the kernel populated by_name itself rather than deferring that to udev, since I'd like to use this facility in virtme, and I'd like to use fw_cfg very early on boot before I even start udev. --Andy