On Fri, Aug 19, 2011 at 11:53:04PM +0300, Giorgis Georgakoudis wrote:

On Fri, Aug 19, 2011 at 19:21, Greg KH [off-list ref] wrote:

    On Fri, Aug 19, 2011 at 11:20:44AM +0300, Giorgis Georgakoudis wrote:
    > Hello all,
    >
    > I would like to ask for some pointers?regarding?
    > porting Linux kernel multiprocessor?support in?
    > new platforms.?More specifically, what are the
    > HW requirements that a platform must have to
    > enable Linux multiprocessing

    It must have more than one processor and both must be able to see the
    same system "image" at the same time.


In fact, I'm trying to support multiprocessing in an experimental architecture
of Microblazes on an FPGA. There isn't (HW) cache coherency and RAM is
accessed through per processor dedicated buses, thus shared access locking?
must be realized either in a software manner or through a dedicated hardware
mutex.

Ah, that's going to take some work, good luck with that.