Il 20/11/2012 17:32, Francois WELLENREITER ha scritto: > > I order to develop a qemu module, I aim to use the PCI CAS (compare > and swap) function to guarantee an atomic access somewhere in the > guest memory (in a multi-core emulation case). > > Nevertheless, I did not find any routine in qemu implementing this > function. > > Could anyone on this list tell me if this is implemented and if that's > not the case, if this would be hard to get implemented ?
(I know nothing about PCI CAS). Can you just use a compare-and-swap in the QEMU device model (via __sync_val_compare_and_swap for example)? Paolo
