From: Peter Rosin <peda@axentia.se>
To: Sascha Hauer <s.hauer@pengutronix.de>, Ahmad Fatoum <ahmad@a3f.at>
Cc: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 3/4] Revert "ARM: mmu: use client domain permissions to support ARMv7 eXecute Never"
Date: Sat, 18 Sep 2021 00:40:46 +0200 [thread overview]
Message-ID: <d4eb8281-121e-91a3-7300-83336ba0f285@axentia.se> (raw)
In-Reply-To: <781e128b-14f3-3577-e433-f6a13fff8159@axentia.se>
This reverts commit 3e4a0405455f66fbae0a98dc1faee5c7c39f17a2.
The patch breaks my SAMA5D3 board.
Signed-off-by: Peter Rosin <peda@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
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next prev parent reply other threads:[~2021-09-17 22:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 22:37 at91 sama5d3 "regressions" Peter Rosin
2021-09-17 22:39 ` [PATCH 1/4] common.h: reintroduce region_overlap() as, old_region_overlap() Peter Rosin
2021-09-17 22:39 ` [PATCH 2/4] ARM: copy data if there is a region overlap Peter Rosin
2021-09-17 22:40 ` Peter Rosin [this message]
2021-09-19 7:06 ` [PATCH 3/4] Revert "ARM: mmu: use client domain permissions to support ARMv7 eXecute Never" Rouven Czerwinski
2021-09-19 7:50 ` Peter Rosin
2021-09-19 20:33 ` Peter Rosin
2021-09-20 9:14 ` Ahmad Fatoum
2021-09-20 10:22 ` Peter Rosin
2021-09-17 22:41 ` [PATCH 4/4] lds: the RO_DATA_SECTION macro does not work on my SAMA5D3 board Peter Rosin
2021-09-17 23:57 ` at91 sama5d3 "regressions" Peter Rosin
2021-09-19 6:32 ` Peter Rosin
2021-09-22 7:06 ` Ahmad Fatoum
2021-09-22 7:41 ` Peter Rosin
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