linux/drivers/dca/Makefile, branch v2.6.27.59Linux kernel source treehttps://git.amat.us/linux/atom/drivers/dca/Makefile?h=v2.6.27.592007-10-16T16:43:09ZDCA: Add Direct Cache Access driver2007-10-16T16:43:09ZShannon Nelsonshannon.nelson@intel.com2007-10-16T08:27:41Zurn:sha1:7589670f37736bcc119ebfbd69aafea6d585d1d4
Direct Cache Access (DCA) is a method for warming the CPU cache before data
is used, with the intent of lessening the impact of cache misses. This
patch adds a manager and interface for matching up client requests for DCA
services with devices that offer DCA services.
In order to use DCA, a module must do bus writes with the appropriate tag
bits set to trigger a cache read for a specific CPU. However, different
CPUs and chipsets can require different sets of tag bits, and the methods
for determining the correct bits may be simple hardcoding or may be a
hardware specific magic incantation. This interface is a way for DCA
clients to find the correct tag bits for the targeted CPU without needing
to know the specifics.
[Dave Miller] use DEFINE_SPINLOCK()
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>