From 7589670f37736bcc119ebfbd69aafea6d585d1d4 Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Tue, 16 Oct 2007 01:27:41 -0700 Subject: 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 Acked-by: David S. Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/Kconfig | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/Kconfig') diff --git a/drivers/Kconfig b/drivers/Kconfig index 7bdae47d6b91..4fb134d50da7 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -84,6 +84,8 @@ source "drivers/rtc/Kconfig" source "drivers/dma/Kconfig" +source "drivers/dca/Kconfig" + source "drivers/auxdisplay/Kconfig" source "drivers/kvm/Kconfig" -- cgit v1.2.3-55-g7522