diff options
| author | Shannon Nelson <shannon.nelson@intel.com> | 2007-10-16 01:27:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:09 -0700 |
| commit | 7589670f37736bcc119ebfbd69aafea6d585d1d4 (patch) | |
| tree | 471f90dda6bcbcd59cc857b4f0130922bba88fc4 /drivers/dca/Kconfig | |
| parent | 3e037454bcfa4b187e8293d2121bd8c0f5a5c31c (diff) | |
DCA: Add Direct Cache Access driver
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>
Diffstat (limited to 'drivers/dca/Kconfig')
| -rw-r--r-- | drivers/dca/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/dca/Kconfig b/drivers/dca/Kconfig new file mode 100644 index 00000000000..e2f7436da05 --- /dev/null +++ b/drivers/dca/Kconfig @@ -0,0 +1,11 @@ +# +# DCA server configuration +# + +config DCA + tristate "DCA support for clients and providers" + default m + help + This is a server to help modules that want to use Direct Cache + Access to find DCA providers that will supply correct CPU tags. + |