[PATCH V2 0/6] riscv: Add GENERIC_ENTRY, IRQ_STACKS support

guoren
2022-09-04T07:27:20Z

From: Guo Ren <guoren@linux.alibaba.com>

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_v2

Changes in V2:
- Fixup compile error by include "riscv: ptrace: Remove duplicate
operation"
https://lore.kernel.org/linux-riscv/20220903162328.1952477-2-guoren@kernel.org/T/#u
- Fixup compile warning
Reported-by: kernel test robot <lkp@intel.com>
- Add test repo link in cover letter

Guo Ren (6):
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: elf_kexec: Fixup compile warning
riscv: compat_syscall_table: Fixup compile warning

arch/riscv/Kconfig | 10 +
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 | 15 +-
arch/riscv/include/asm/vmap_stack.h | 28 +++
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/elf_kexec.c | 4 +
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 | 26 +++
arch/riscv/kernel/traps.c | 11 ++
arch/riscv/mm/fault.c | 12 +-
18 files changed, 250 insertions(+), 282 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