From: Stepan Moskovchenko <stepanm@codeaurora.org>
Date: Tue, 16 Nov 2010 01:46:10 +0000 (-0800)
Subject: msm: iommu: Kconfig item for cacheable page tables
X-Git-Tag: upstream/snapshot3+hdmi~11656^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2607b0a26094b2d2d174c3e27b2ecc9c49d86f40;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

msm: iommu: Kconfig item for cacheable page tables

Add a Kconfig item to allow the IOMMU page tables to be
coherent in the L2 cache. This generally reduces IOTLB miss
latencies and has been shown to improve multimedia
performance.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
---

diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index dbbcfeb..1c6f76b 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -122,6 +122,10 @@ config MACH_MSM8X60_FFA
 
 endmenu
 
+config IOMMU_PGTABLES_L2
+	def_bool y
+	depends on ARCH_MSM8X60 && MMU && SMP && CPU_DCACHE_DISABLE=n
+
 config MSM_DEBUG_UART
 	int
 	default 1 if MSM_DEBUG_UART1