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503eea4519
u-boot-brain/arch
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Patrick Delaunay 503eea4519 arm: cp15: update DACR value to activate access control 
Update the initial value of Domain Access Control Register (DACR)
and set by default the access permission to client (DACR_Dn_CLIENT = 1U)
for each of the 16 domains and no more to all-supervisor
(DACR_Dn_MANAGER = 3U).

This patch allows to activate the domain checking in MMU against the
permission bits in the translation tables and avoids prefetching issue
on ARMv7 [1].

Today it was already done for OMAP2 architecture
./arch/arm/mach-omap2/omap-cache.c::arm_init_domains
introduced by commit de63ac278c ("ARM: mmu: Set domain permissions
to client access") which fixes lot of speculative prefetch aborts seen
on OMAP5 secure devices.

[1] https://developer.arm.com/documentation/ddi0406/b/System-Level-Architecture/Virtual-Memory-System-Architecture--VMSA-/Memory-access-control/The-Execute-Never--XN--attribute-and-instruction-prefetching

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reported-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-02 15:53:37 -05:00
..
arc reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
arm arm: cp15: update DACR value to activate access control 2021-03-02 15:53:37 -05:00
m68k Merge branch '2021-02-02-drop-asm_global_data-when-unused' 2021-02-15 10:16:45 -05:00
microblaze common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
mips common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
nds32 reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
nios2 common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
powerpc ppc: Remove MPC8569MDS board 2021-02-25 11:59:54 -05:00
riscv riscv: k210: Enable QSPI for spi3 2021-02-25 18:06:08 +08:00
sandbox reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
sh reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
x86 reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
xtensa common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
.gitignore
Kconfig linker_lists: Fix alignment issue 2020-12-18 20:32:21 -07:00
u-boot-elf.lds arch: Add explicit linker script for u-boot-elf 2020-04-03 11:52:55 -04:00