[PATCH V3 0/7] riscv: Add GENERIC_ENTRY, irq stack support

guoren
2022-09-06T03:54:48Z

The patches convert riscv to use the generic entry infrastructure from
kernel/entry/*. Add independent irq stacks (IRQ_STACKS) for percpu to
prevent kernel stack overflows. Add the HAVE_SOFTIRQ_ON_OWN_STACK
feature for the IRQ_STACKS config. You can try it directly with [1].

[1] https://github.com/guoren83/linux/tree/generic_entry_v3

V3:
- Fixup CONFIG_COMPAT=n compile error
- Add THREAD_SIZE_ORDER config
- Optimize elf_kexec.c warning fixup
- Add static to irq_stack_ptr definition

V2:
Link: https://lore.kernel.org/linux-riscv/20220904072637.8619-1-guoren@kernel.org/
- Fixup compile error by include "riscv: ptrace: Remove duplicate
operation"
- Fixup compile warning
Reported-by: kernel test robot <lkp@intel.com>
- Add test repo link in cover letter

V1:
Link: https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@kernel.org/

Guo Ren (7):
riscv: elf_kexec: Fixup compile warning
riscv: compat_syscall_table: Fixup compile warning
riscv: ptrace: Remove duplicate operation
riscv: convert to generic entry
riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK
riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK
riscv: Add config of thread stack size

arch/riscv/Kconfig | 19 ++
arch/riscv/include/asm/csr.h | 1 -
arch/riscv/include/asm/entry-common.h | 8 +
arch/riscv/include/asm/irq.h | 3 +
arch/riscv/include/asm/ptrace.h | 10 +-
arch/riscv/include/asm/stacktrace.h | 5 +
arch/riscv/include/asm/syscall.h | 6 +
arch/riscv/include/asm/thread_info.h | 19 +-
arch/riscv/include/asm/vmap_stack.h | 28 +++
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/elf_kexec.c | 2 +-
arch/riscv/kernel/entry.S | 255 +++++---------------------
arch/riscv/kernel/irq.c | 75 ++++++++
arch/riscv/kernel/ptrace.c | 41 -----
arch/riscv/kernel/signal.c | 21 +--
arch/riscv/kernel/sys_riscv.c | 27 +++
arch/riscv/kernel/traps.c | 11 ++
arch/riscv/mm/fault.c | 12 +-
18 files changed, 259 insertions(+), 285 deletions(-)
create mode 100644 arch/riscv/include/asm/entry-common.h
create mode 100644 arch/riscv/include/asm/vmap_stack.h

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2.36.1