Basically I have the situation when box is booting from usb (gentoo-minimal.iso) but installation is lacking the firmware for killer 1525 (ath10k). The filesystem is mounted as ro and I can't put needed firmware into /lib/firmware. What are the other ways to load firmware in this situation?
Basically what I'm trying to is to make udev rule that will point the kernel to look up firmware and drivers for my wifi card within usb drive or some other place that is not mounted ro.
It's possible on other live cd when they are used in hybrid iso mode like SystemRescueCd. I'm not sure why it's possible there but not possible on gentoo original minimal livecd as they both are founded on gentoo live cd.