Currently for ARM based cpu's, mmu pagetable attributes are set with manager permissions for all 4GB address space. Because of this the 'execute never (XN)' permission is never checked on read sensitive regions which results in speculative aborts.
This series changes the domain permissions of the full 4GB space to client access for OMAP socs. This avoids all the speculative aborts that are currently seen on OMAP5 secure devices.
Tested on OMAP5 SDP (HS) soc.
This is a repost of the older series to include Vincent's patch in the same one.
R Sricharan (2): ARM: mmu: Introduce weak dram_bank_setup function ARM: mmu: Set domain permissions to client access
Vincent Stehlé (1): ARM: cache: declare set_section_dcache
arch/arm/cpu/armv7/cache_v7.c | 3 ++ arch/arm/cpu/armv7/omap-common/hwinit-common.c | 35 ++++++++++++++++++++++++ arch/arm/include/asm/cache.h | 2 ++ arch/arm/include/asm/system.h | 14 ++++++++++ arch/arm/lib/cache-cp15.c | 11 +++++++- 5 files changed, 64 insertions(+), 1 deletion(-)