File 0026-pmon-enabled-userspace-access-to-performance-counter.patch of Package kernel-adaptation-dm3730

From b616d3833446804f7f5e4c3c2676e33bd835e2ac Mon Sep 17 00:00:00 2001
From: MediStream-Devel-VM <info@berlinux-solutions.de>
Date: Mon, 18 Mar 2013 10:37:26 +0100
Subject: [PATCH] pmon: -enabled userspace access to performance counters

---
 arch/arm/mm/Kconfig   |    7 +++++++
 arch/arm/mm/proc-v7.S |    4 ++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 7c8a7d8..e7fe599 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -918,3 +918,10 @@ config ARCH_HAS_BARRIERS
 	help
 	  This option allows the use of custom mandatory barriers
 	  included via the mach/barriers.h file.
+
+config USER_PMON
+	bool "Enable userspace access to performance counters"
+	depends on CPU_V7
+	default n
+	help
+	  Enable userpsace access to the performance monitor registers.
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index c2e2b66..18317cb 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -255,6 +255,10 @@ __v7_setup:
 	mcr	p15, 0, r5, c10, c2, 0		@ write PRRR
 	mcr	p15, 0, r6, c10, c2, 1		@ write NMRR
 #endif
+#ifdef CONFIG_USER_PMON
+	mov	r0, #1
+	mcr	p15, 0, r0, c9, c14, 0
+#endif
 #ifndef CONFIG_ARM_THUMBEE
 	mrc	p15, 0, r0, c0, c1, 0		@ read ID_PFR0 for ThumbEE
 	and	r0, r0, #(0xf << 12)		@ ThumbEE enabled field
-- 
1.7.5.4