linux/Documentation/features/vm/pte_special/arch-support.txt

#
# Feature name:          pte_special
#         Kconfig:       ARCH_HAS_PTE_SPECIAL
#         description:   arch supports the pte_special()/pte_mkspecial() VM APIs
#
    -----------------------
    |         arch |status|
    -----------------------
    |       alpha: | TODO |
    |         arc: |  ok  |
    |         arm: |  ok  |
    |       arm64: |  ok  |
    |        csky: | TODO |
    |     hexagon: | TODO |
    |   loongarch: |  ok  |
    |        m68k: | TODO |
    |  microblaze: | TODO |
    |        mips: |  ok  |
    |       nios2: | TODO |
    |    openrisc: | TODO |
    |      parisc: |  ok  |
    |     powerpc: |  ok  |
    |       riscv: |  ok  |
    |        s390: |  ok  |
    |          sh: |  ok  |
    |       sparc: |  ok  |
    |          um: | TODO |
    |         x86: |  ok  |
    |      xtensa: | TODO |
    -----------------------