Fix port IO in `fw_cfg` device for x86 - #190

Open

scholzp wants to merge 8 commits into

cyberus-technology:gardenlinuxfrom

scholzp:fw_cfg_fix_pio

Commits on Aug 19, 2026

devices: Disable `fw_cfg` DMA transfers
scholzp
committed
6b76b2d
devices: Use correct signature for selector 0x0000 in `fw_cfg`
scholzp
committed
1fc306c
devices: Restrict x86 fw_cfg PIO reads to one byte
scholzp
committed
6cfa09d
devices: Return zero for invalid-width `fw_cfg` PIO reads
scholzp
committed
1d9c7b9
devices: Use offset semantics when matching bus addresses in fw_cfg
scholzp
committed
a8f05c3
devices: Mimic QEMU `fw_cfg` selector-read quirk
scholzp
committed
bdfd9a9
devices: Rework `fw_cfg` traditional/PIO interface reads
scholzp
committed
6ff8be1
devices: Allow arbitrary length reads from fw_cfg DATA
scholzp
committed
c74f9e8