[PATCHv8 00/12] Contiguous Memory Allocator
mina86 at mina86.com
Tue Jan 4 11:59:01 EST 2011
> Russell King wrote:
>> Has anyone addressed my issue with it that this is wide-open for
>> abuse by allocating large chunks of memory, and then remapping
>> them in some way with different attributes, thereby violating the
>> ARM architecture specification?
2011/1/4 Johan MOSSBERG <johan.xx.mossberg at stericsson.com>:
> Where in the specification (preferably ARMv7) can I find
> information about this? Is the problem that it is simply
> forbidden to map an address multiple times with different cache
> setting and if this is done the hardware might start failing? Or
> is the problem that having an address mapped cached means that
> speculative pre-fetch can read it into the cache at any time,
> possibly causing problems if an un-cached mapping exists?
IIRC both apply.
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