On 2011-02-14 12:22, Gerd Hoffmann wrote: > On 02/08/11 00:26, Alexander Graf wrote: >> The new ISA infrastructure checks for potential irq sharing bugs on >> interrupt lines, because usually irq lines on isa can't be shared. >> >> The PREP spec however mandates that the irq lines for both IDE ports >> are shared and according to Aurelien this also used to work just fine. >> >> So let's add a way to enable this sharing again, so we don't introduce >> unnecessary regressions over older versions of Qemu. > > Had a patch for that, got shoot down for reasons I don't remember, > attached for reference. It basically allows IRQ sharing in case the two > devices sharing the IRQ are of the same kind. In that case you usually > have a single guest driver handling both devices and IRQ sharing works > most of the time.
Yeah, 3x -serial XXX is also broken for x86 targets as the third device shares its IRQ with the first - like on real HW... Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux
