[RESEND PATCH v1 0/2] Add Sv57 page table support

[Heiko Stübner]

Am Mittwoch, 24. November 2021, 12:20:19 CET schrieb panqinglin2020 at iscas.ac.cn:
> From: Qinglin Pan <panqinglin2020 at iscas.ac.cn>
> 
> This patchset is based on Alex's Sv48 patchset v2.
> 
> This implements Sv57 support at runtime. The kernel will try to boot with
> 5-level page table firstly when the mmu-type field in dtb is "mmu,sv57" or null,
> and will fallback to 4-level if the HW does not support it.
> 
> Tested on:
>   - qemu rv64 sv39
>   - qemu rv64 sv48
>   - qemu rv64 sv57
>   - Sifive unmatched


On a beagleV (which supports only sv39) I've tested both the limit via
the mmu-type in the devicetree and also that the fallback works when
I disable the mmu-type in the dt, so

Tested-by: Heiko Stuebner <heiko at sntech.de>



> Qinglin Pan (2):
>   riscv,mm: Add Sv57 support based on Sv48 implementation
>   Documentation, mm: Add Sv57 vm layout documentation
> 
>  Documentation/riscv/vm-layout.rst   |  36 ++++++
>  arch/riscv/Kconfig                  |   4 +-
>  arch/riscv/include/asm/csr.h        |   1 +
>  arch/riscv/include/asm/fixmap.h     |   1 +
>  arch/riscv/include/asm/page.h       |   1 +
>  arch/riscv/include/asm/pgalloc.h    |  49 ++++++++
>  arch/riscv/include/asm/pgtable-64.h | 103 ++++++++++++++++-
>  arch/riscv/include/asm/pgtable.h    |   4 +-
>  arch/riscv/kernel/cpu.c             |   4 +-
>  arch/riscv/mm/init.c                | 169 +++++++++++++++++++++++++---
>  10 files changed, 348 insertions(+), 24 deletions(-)
> 
>