RISC-V: Add Sv57 page table support

This implements Sv57 support at runtime. The kernel will try to boot with 5-level page table firstly , and will fallback to 4-level if the HW does not support it. And it will finally fallback to 3-level if the HW alse does not support sv48. * riscv-sv57: riscv: mm: Support kasan for sv57 riscv: mm: Set sv57 on defaultly riscv: mm: Prepare pt_ops helper functions for sv57 riscv: mm: Control p4d's folding by pgtable_l5_enabled
2026-10-16 22:39:48 +00:00 · 2022-02-22 09:40:52 -08:00 · 2022-02-22 09:40:52 -08:00 · 9195c294bc
commit 9195c294bc
parent 67ff2f2626 8fbdccd2b1
10 changed files with 451 additions and 42 deletions
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
--- a/arch/riscv/include/asm/fixmap.h
+++ b/arch/riscv/include/asm/fixmap.h
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
--- a/arch/riscv/include/asm/pgalloc.h
+++ b/arch/riscv/include/asm/pgalloc.h
--- a/arch/riscv/include/asm/pgtable-64.h
+++ b/arch/riscv/include/asm/pgtable-64.h
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c