From: Alexandru Elisei <alexandru.elisei@xxxxxxx> According to the ARM ARM [1]: "In Armv8, any permitted instruction cache implementation can be described as implementing the IVIPT Extension to the Arm architecture. The formal definition of the Arm IVIPT Extension is that it reduces the instruction cache maintenance requirement to the following condition: Instruction cache maintenance is required only after writing new data to a PA that holds an instruction". We never patch instructions in the boot path, so remove the icache invalidation from asm_mmu_enable. Tests that modify instructions (like the cache test) should have their own icache maintenance operations. [1] ARM DDI 0487E.a, section D5.11.2 "Instruction caches" Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx> Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx> --- arm/cstart64.S | 1 - 1 file changed, 1 deletion(-) diff --git a/arm/cstart64.S b/arm/cstart64.S index 6f49506ca19b..e5a561ea2e39 100644 --- a/arm/cstart64.S +++ b/arm/cstart64.S @@ -159,7 +159,6 @@ halt: .globl asm_mmu_enable asm_mmu_enable: - ic iallu // I+BTB cache invalidate tlbi vmalle1 // invalidate I + D TLBs dsb nsh -- 2.21.0
