[PATCH 3/4] Revert "ARM: mmu: use client domain permissions to support ARMv7 eXecute Never"

[Peter Rosin]

This reverts commit 3e4a0405455f66fbae0a98dc1faee5c7c39f17a2.

The patch breaks my SAMA5D3 board.

Signed-off-by: Peter Rosin <peda at axentia.se>
---
 arch/arm/cpu/mmu-early.c | 7 +------
 arch/arm/cpu/mmu.c       | 7 +------
 arch/arm/cpu/mmu.h       | 1 -
 3 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/arch/arm/cpu/mmu-early.c b/arch/arm/cpu/mmu-early.c
index b985aa455fe8..92b1161985fb 100644
--- a/arch/arm/cpu/mmu-early.c
+++ b/arch/arm/cpu/mmu-early.c
@@ -29,12 +29,7 @@ void mmu_early_enable(unsigned long membase, unsigned long memsize,
 	arm_set_cache_functions();
 
 	set_ttbr(ttb);
-
-	/* For the XN bit to take effect, we can't be using DOMAIN_MANAGER. */
-	if (cpu_architecture() >= CPU_ARCH_ARMv7)
-		set_domain(DOMAIN_CLIENT);
-	else
-		set_domain(DOMAIN_MANAGER);
+	set_domain(DOMAIN_MANAGER);
 
 	/*
 	 * This marks the whole address space as uncachable as well as
diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index 6388e1bf14f6..d0aff9e7f027 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -452,12 +452,7 @@ void __mmu_init(bool mmu_on)
 		ttb = xmemalign(ARM_TTB_SIZE, ARM_TTB_SIZE);
 
 		set_ttbr(ttb);
-
-		/* For the XN bit to take effect, we can't be using DOMAIN_MANAGER. */
-		if (cpu_architecture() >= CPU_ARCH_ARMv7)
-			set_domain(DOMAIN_CLIENT);
-		else
-			set_domain(DOMAIN_MANAGER);
+		set_domain(DOMAIN_MANAGER);
 
 		create_flat_mapping(ttb);
 		__mmu_cache_flush();
diff --git a/arch/arm/cpu/mmu.h b/arch/arm/cpu/mmu.h
index c85e0ea05033..e8b72662cddc 100644
--- a/arch/arm/cpu/mmu.h
+++ b/arch/arm/cpu/mmu.h
@@ -36,7 +36,6 @@ static inline void set_ttbr(void *ttb)
 	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
 }
 
-#define DOMAIN_CLIENT	1
 #define DOMAIN_MANAGER	3
 
 static inline unsigned long get_domain(void)
-- 
2.20.1