On Mon, 2007-03-26 at 16:21 -0400, Mike Frysinger wrote: > On 3/26/07, David Howells <[EMAIL PROTECTED]> wrote: > > [*] The FRV, for example, does have some limited protection capability - but > > it is really limited and not really useful in this case. >
Sorry for late response. > how so ? the Blackfin processor lacks a MMU but it does have a MPU > (memory protection unit) which allows granularity down to 1k page > sizes ... so for future releases, we plan on integrating optional > support for this so that you could have processes protected from each > other and the kernel protected from all the processes ... so in our > case, we might actually be able to support revoking of maps because we > would have that region of memory ear marked as unaccessible ... > Agree. MPU of Blackfin can provide some processes protection. But maybe at this moment just disable revoke for NOMMU is easier for further development. When we provide the MPU stuff, maybe we can enable the revoke for NOMMU but MPU arch. > note that the Blackfin processor manuals confusingly call this aspect > of the chip an "MMU" ... dont be fooled ! > -mike Thanks -Bryan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
