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Subject[PATCH v2 0/5] Boot RISC-V kernel from any 4KB aligned address
Date
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 based on Linux-5.1-rc1 and tested on SiFive Unleashed
board and QEMU virt machine.

It can also be found in riscv_setup_vm_v2 branch of
https//github.com/avpatel/linux.git

Changes since v1:
- Add kconfig option BOOT_PAGE_ALIGNED to enable 4KB aligned booting
- Improved initial page table setup code to select best/biggest
possible mapping size based on load address alignment
- Added PATCH4 to remove redundant trampoline page table
- Added PATCH5 to fix memory reservation in setup_bootmem()

Anup Patel (5):
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
RISC-V: Remove redundant trampoline page table
RISC-V: Fix memory reservation in setup_bootmem()

arch/riscv/Kconfig | 11 +
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 | 15 +-
arch/riscv/kernel/setup.c | 4 +-
arch/riscv/mm/init.c | 391 +++++++++++++++++++++++-----
8 files changed, 450 insertions(+), 71 deletions(-)
create mode 100644 arch/riscv/configs/rv32_defconfig

--
2.17.1

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