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ARM: imx6: mark OCRAM mapping read-only
authorRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tue, 21 Sep 2021 11:59:59 +0000 (12:59 +0100)
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tue, 19 Oct 2021 09:30:58 +0000 (10:30 +0100)
commit4aede550f104158963260cdb736d0889a7671d6f
tree4feb29db78993c265fbafd8efcb3f6855b190b70tree | snapshot
parentb8bc0e50a32a3c3b51605e41de41b4d7952e6aa4commit | diff
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>
arch/arm/mach-imx/pm-imx6.c diff | blob | history
Domain: System / Kernel;