On Tue, Jun 19, 2007 at 02:01:50PM +0200, Daniel Schwen wrote: > Would it be possible to register a set of io ports and io memory locations > with qemu and have all read write operations passed on to the host system? > > A quick look at the source shows me the two look-up tables > IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS]; > IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS]; > Instead of the default function (which just generates debug output) it should > be possible to register functions which call the ioport read/write commands > on the host system (qemu would have to be launched as root to acquire io > permissions). > > Same should work with io memory using the cpu_register_io_memory function. > Or am I far off base? > > Reason is that I'd like to emulate some very old linux installations which > access custom ISA hardware. For some of the ISA boards we have no source > code, only binaries linked to a 2.0.something kernel... ------------------------- I think it is possible just as you said. But, take care of the interrupts! If your device don't generate interrupts, that's fine! If they do, then you must find a way to propagate this interrupt signal to qemu.
And, there can't be another entity(e.g, host driver) operating on the device simultaneously. -- You worry too much about your job. Stop it. You are not paid enough to worry.
