You may want to consider the following additional patches for the next stable release:
106543de - ahci: Set upper 32-bit registers to zero 970af16e - vgasrc: Increase debug level dbf9dd27 - ps2port: Disable keyboard/mouse prior to resetting ps2 controller
So I have this now queued up for 1.10.2
kraxel@nilsson ~/projects/seabios (1.10-stable)# git log --oneline --reverse rel-1.10.1.. ca3ab93 ahci: Set upper 32-bit registers to zero b0e3c67 vgasrc: Increase debug level d2ac564 ps2port: Disable keyboard/mouse prior to resetting ps2 controller 2a1d88c QEMU DMA: Add DMA write capability aa7219d romfile-loader: Switch to using named structs 31b6229 QEMU fw_cfg: Add command to write back address of file c45ca70 QEMU fw_cfg: Add functions for accessing files by key 5f4c7b1 QEMU fw_cfg: Write fw_cfg back on S3 resume
qemu soft freeze for 2.9 is next tue (feb 28th), so my plan is to tag the 1.10.2 release and prepare the qemu pull request monday.