On Wed, Aug 04, 2010 at 08:04:09AM -0500, Anthony Liguori wrote: > On 08/04/2010 03:17 AM, Avi Kivity wrote: > >For playing games, there are three options: > >- existing fwcfg > >- fwcfg+dma > >- put roms in 4GB-2MB (or whatever we decide the flash size is) > >and have the BIOS copy them > > > >Existing fwcfg is the least amount of work and probably > >satisfactory for isapc. fwcfg+dma is IMO going off a tangent. > >High memory flash is the most hardware-like solution, pretty easy > >from a qemu point of view but requires more work. > > The only trouble I see is that high memory isn't always available. > If it's a 32-bit PC and you've exhausted RAM space, then you're only > left with the PCI hole and it's not clear to me if you can really > pull out 100mb of space there as an option ROM without breaking > something. > We can map it on demand. Guest tells qemu to map rom "A" to address X by writing into some io port. Guest copies rom. Guest tells qemu to unmap it. Better then DMA interface IMHO. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
