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| author |   Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-09-21 12:59:59 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-10-19 10:30:58 +0100 |
| commit | 4aede550f104158963260cdb736d0889a7671d6f (patch) | |
| tree | 4feb29db78993c265fbafd8efcb3f6855b190b70 /arch/arm/mach-imx/pm-imx6.c | |
| parent | ARM: add __arm_iomem_set_ro() to write-protect ioremapped area (diff) | |
| download | linux-dev-4aede550f104158963260cdb736d0889a7671d6f.tar.xz linux-dev-4aede550f104158963260cdb736d0889a7671d6f.zip | |
ARM: imx6: mark OCRAM mapping read-only
iMX6 needs to write some code to OCRAM which resumes the DDR controller
after suspend. However, merely using __arm_ioremap_exec() causes the
kernel to complain of a W+X mapping. Solve this by using the newly
introduced __arm_iomem_set_ro() function to prevent inadvertent or
malicious writes to code we may later execute.
Tested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/mach-imx/pm-imx6.c')
| -rw-r--r-- | arch/arm/mach-imx/pm-imx6.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c index 9244437cb1b9..5c16257872a5 100644 --- a/arch/arm/mach-imx/pm-imx6.c +++ b/arch/arm/mach-imx/pm-imx6.c @@ -571,6 +571,8 @@ static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata) &imx6_suspend, MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info)); + __arm_iomem_set_ro(suspend_ocram_base, MX6Q_SUSPEND_OCRAM_SIZE); + goto put_device; pl310_cache_map_failed: |