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[0/3] Boot RISC-V kernel from any 4KB aligned address

Message ID 20190312220752.128141-1-anup.patel@wdc.com (mailing list archive)
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Series Boot RISC-V kernel from any 4KB aligned address | expand

Message

Anup Patel March 12, 2019, 10:08 p.m. UTC 
From: Anup Patel <anup@brainfault.org>

This patchset primarily extends initial page table setup using fixmap
to boot Linux RISC-V kernel (64bit and 32bit) from any 4KB aligned address.
We also add 32bit defconfig to allow people to try 32bit Linux RISC-V
kernel as well.

The patchset is tested on SiFive Unleashed board and QEMU virt machine.

It can also be found in riscv_setup_vm_v1 branch of
https//github.com/avpatel/linux.git

Anup Patel (3):
  RISC-V: Add separate defconfig for 32bit systems
  RISC-V: Make setup_vm() independent of GCC code model
  RISC-V: Allow booting kernel from any 4KB aligned address

 arch/riscv/configs/rv32_defconfig   |  84 +++++++
 arch/riscv/include/asm/fixmap.h     |   5 +
 arch/riscv/include/asm/pgtable-64.h |   5 +
 arch/riscv/include/asm/pgtable.h    |   6 +-
 arch/riscv/kernel/head.S            |   2 +
 arch/riscv/kernel/setup.c           |   4 +-
 arch/riscv/mm/init.c                | 370 +++++++++++++++++++++++-----
 7 files changed, 419 insertions(+), 57 deletions(-)
 create mode 100644 arch/riscv/configs/rv32_defconfig