linux-kernel - [PATCH 0/5] Fixmap support and MM cleanups

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Date:   Mon,  7 Jan 2019 21:40:42 +0530
From:   Anup Patel <anup@...infault.org>
To:     Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     Atish Patra <atish.patra@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <anup@...infault.org>
Subject: [PATCH 0/5] Fixmap support and MM cleanups

This patchset does:
1. Moves MM related code from kernel/setup.c to mm/init.c
2. Implements compile-time fixed mappings

Using fixed mappings available, we can now get earlyprints
even without SBI calls. For example, we can use kernel
parameter "earlycon=uart8250,mmio,0x10000000" to get early
prints on QEMU virt machine without using SBI calls.

The patchset is tested on QEMU virt machine. It is based on
Linux-5.0-rc1 and can be found at riscv_fixmap_v1 branch of:
https://github.com/avpatel/linux.git.

Anup Patel (5):
  RISC-V: Move free_initrd_mem() to kernel/setup.c
  RISC-V: Setup init_mm before parse_early_param()
  RISC-V: Move setup_bootmem() to mm/init.c
  RISC-V: Move setup_vm() to mm/init.c
  RISC-V: Implement compile-time fixed mappings

 arch/riscv/Kconfig               |   3 +
 arch/riscv/include/asm/fixmap.h  |  52 +++++++++++++
 arch/riscv/include/asm/pgtable.h |   1 +
 arch/riscv/kernel/setup.c        | 106 +++-----------------------
 arch/riscv/mm/init.c             | 123 ++++++++++++++++++++++++++++++-
 5 files changed, 186 insertions(+), 99 deletions(-)
 create mode 100644 arch/riscv/include/asm/fixmap.h

-- 
2.17.1