[PATCH 0/4] riscv: 64-bit NOMMU fixes and enhancements
Samuel Holland
samuel.holland at sifive.com
Mon Feb 26 16:34:45 PST 2024
This series aims to improve support for NOMMU, specifically by making it
easier to test NOMMU kernels in QEMU and on various widely-available
hardware (errata permitting). After all, everything supports Svbare...
After applying this series, a NOMMU kernel based on defconfig (changing
only the three options below*) boots to userspace on QEMU when passed as
-kernel.
# CONFIG_RISCV_M_MODE is not set
# CONFIG_MMU is not set
CONFIG_NONPORTABLE=y
*if you are using LLD, you must also disable BPF_SYSCALL and KALLSYMS,
because LLD bails on out-of-range references to undefined weak symbols.
Samuel Holland (4):
riscv: Fix TASK_SIZE on 64-bit NOMMU
riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
riscv: Remove MMU dependency from Zbb and Zicboz
riscv: Allow NOMMU kernels to run in S-mode
arch/riscv/Kconfig | 17 ++++++++++-------
arch/riscv/include/asm/page.h | 2 +-
arch/riscv/include/asm/pgtable.h | 2 +-
arch/riscv/mm/init.c | 2 +-
4 files changed, 13 insertions(+), 10 deletions(-)
--
2.43.0
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