On Thu, 2015-02-26 at 10:45 +0100, Laszlo Ersek wrote: > On 02/26/15 02:13, Gabriel L. Somlo wrote: > > For myself, I'm tempted to write a kernel driver to allow me to simply > > "cat /sys/firmware/fw_cfg/etc/guestinfo | grep '^key_name='" when I > > need to retrieve a guest environment variable. > > You might not need a kernel driver for this. If you have ioport access > (on x86), you can speak the fwcfg "protocol" directly.
Personally, I'd be much happier to see this information exposed via /sys/firmware/fw_cfg, not least because that allows you to use the same tools on x86, arm64, etc.
