| config STRICT_MEMORY_RWX | |
| bool "restrict kernel memory permissions as much as possible" | |
| help | |
| If this is set, kernel text will be made RX, kernel data and stack | |
| RW, rodata R (otherwise all of the kernel 1-to-1 mapping is | |
| made RWX). | |
| The tradeoff is that several sections are padded to | |
| 2M boundaries (because their permissions are different and | |
| splitting the 2M pages into 4K ones causes TLB performance | |
| problems), wasting memory. |