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Date: Mon, 14 Aug 2017 13:53:53 +0100
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
To: kernel-hardening@...ts.openwall.com
Cc: linux-arm-kernel@...ts.infradead.org,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Nicolas Pitre <nico@...aro.org>,
Russell King <linux@...linux.org.uk>,
Kees Cook <keescook@...omium.org>,
Thomas Garnier <thgarnie@...gle.com>,
Marc Zyngier <marc.zyngier@....com>,
Mark Rutland <mark.rutland@....com>,
Tony Lindgren <tony@...mide.com>,
Matt Fleming <matt@...eblueprint.co.uk>,
Dave Martin <dave.martin@....com>
Subject: [PATCH 12/30] arm-soc: exynos: replace open coded VA->PA conversions
This replaces a couple of open coded calculations to obtain the
physical address of a far symbol with calls to the new adr_l etc
macros.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
---
arch/arm/mach-exynos/headsmp.S | 9 +------
arch/arm/mach-exynos/sleep.S | 26 ++++----------------
2 files changed, 6 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-exynos/headsmp.S b/arch/arm/mach-exynos/headsmp.S
index d3d24ab351ae..25de5aff1c41 100644
--- a/arch/arm/mach-exynos/headsmp.S
+++ b/arch/arm/mach-exynos/headsmp.S
@@ -23,10 +23,7 @@ ENTRY(exynos4_secondary_startup)
ARM_BE8(setend be)
mrc p15, 0, r0, c0, c0, 5
and r0, r0, #15
- adr r4, 1f
- ldmia r4, {r5, r6}
- sub r4, r4, r5
- add r6, r6, r4
+ adr_l r6, pen_release
pen: ldr r7, [r6]
cmp r7, r0
bne pen
@@ -37,7 +34,3 @@ pen: ldr r7, [r6]
*/
b secondary_startup
ENDPROC(exynos4_secondary_startup)
-
- .align 2
-1: .long .
- .long pen_release
diff --git a/arch/arm/mach-exynos/sleep.S b/arch/arm/mach-exynos/sleep.S
index cf950790fbdc..003465699263 100644
--- a/arch/arm/mach-exynos/sleep.S
+++ b/arch/arm/mach-exynos/sleep.S
@@ -17,6 +17,7 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
+#include <asm/assembler.h>
#include <asm/hardware/cache-l2x0.h>
#include "smc.h"
@@ -62,19 +63,13 @@ ENTRY(exynos_cpu_resume_ns)
cmp r0, r1
bne skip_cp15
- adr r0, _cp15_save_power
- ldr r1, [r0]
- ldr r1, [r0, r1]
- adr r0, _cp15_save_diag
- ldr r2, [r0]
- ldr r2, [r0, r2]
+ ldr_l r1, cp15_save_power
+ ldr_l r2, cp15_save_diag
mov r0, #SMC_CMD_C15RESUME
dsb
smc #0
#ifdef CONFIG_CACHE_L2X0
- adr r0, 1f
- ldr r2, [r0]
- add r0, r2, r0
+ adr_l r0, l2x0_saved_regs
/* Check that the address has been initialised. */
ldr r1, [r0, #L2X0_R_PHY_BASE]
@@ -93,9 +88,7 @@ ENTRY(exynos_cpu_resume_ns)
smc #0
/* Reload saved regs pointer because smc corrupts registers. */
- adr r0, 1f
- ldr r2, [r0]
- add r0, r2, r0
+ adr_l r0, l2x0_saved_regs
ldr r1, [r0, #L2X0_R_PWR_CTRL]
ldr r2, [r0, #L2X0_R_AUX_CTRL]
@@ -114,15 +107,6 @@ skip_cp15:
b cpu_resume
ENDPROC(exynos_cpu_resume_ns)
- .align
-_cp15_save_power:
- .long cp15_save_power - .
-_cp15_save_diag:
- .long cp15_save_diag - .
-#ifdef CONFIG_CACHE_L2X0
-1: .long l2x0_saved_regs - .
-#endif /* CONFIG_CACHE_L2X0 */
-
.data
.globl cp15_save_diag
cp15_save_diag:
--
2.11.0
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