On 03/19/2012 05:56 PM, Michael S. Tsirkin wrote: > Currently virtio-pci is specified so that configuration of the device is > done through a PCI IO space (via BAR 0 of the virtual PCI device). > However, Linux guests happen to use ioread/iowrite/iomap primitives > for access, and these work uniformly across memory/io BARs. > > While PCI IO accesses are faster than MMIO on x86 kvm, > MMIO might be helpful on other systems which don't > implement PIO or where PIO is slower than MMIO. > > Add a property to make it possible to tweak the BAR type. > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > > This is harmless by default but causes segfaults in memory.c > when enabled. Thus an RFC until I figure out what's wrong. >
Should be done via an extra BAR (with the same layout, perhaps extended) so compatibility is preserved. -- error compiling committee.c: too many arguments to function
