mbox series

[0/3] riscv: Add GENERIC_ENTRY & IRQ_STACKS support

Message ID 20220903163808.1954131-1-guoren@kernel.org (mailing list archive)
Headers show
Series riscv: Add GENERIC_ENTRY & IRQ_STACKS support | expand

Message

Guo Ren Sept. 3, 2022, 4:38 p.m. UTC 
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.

Guo Ren (3):
  riscv: convert to generic entry
  riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK
  riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK

 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          |   2 +
 arch/riscv/include/asm/ptrace.h       |  10 +-
 arch/riscv/include/asm/stacktrace.h   |   5 +
 arch/riscv/include/asm/syscall.h      |   5 +
 arch/riscv/include/asm/thread_info.h  |  15 +-
 arch/riscv/include/asm/vmap_stack.h   |  28 +++
 arch/riscv/kernel/entry.S             | 255 +++++---------------------
 arch/riscv/kernel/irq.c               |  74 ++++++++
 arch/riscv/kernel/ptrace.c            |  40 ----
 arch/riscv/kernel/signal.c            |  20 +-
 arch/riscv/kernel/sys_riscv.c         |  26 +++
 arch/riscv/kernel/traps.c             |  11 ++
 arch/riscv/mm/fault.c                 |  12 +-
 16 files changed, 241 insertions(+), 281 deletions(-)
 create mode 100644 arch/riscv/include/asm/entry-common.h
 create mode 100644 arch/riscv/include/asm/vmap_stack.h