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

[Guo Ren]

On Mon, Sep 5, 2022 at 9:27 PM Jisheng Zhang <jszhang@xxxxxxxxxx> wrote:
>
> On Sun, Sep 04, 2022 at 03:26:31AM -0400, guoren@xxxxxxxxxx wrote:
> > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
> >
> > The patches convert riscv to use the generic entry infrastructure from
> > kernel/entry/*. Add independent irq stacks (IRQ_STACKS) for percpu to
>
> Amazing! You read my mind. I planed to do similar series this week, as
I'm happy you liked it.

> can be seen, I didn't RESEND the riscv irqstack patch, I planed to add
> irqstack after generic entry. Thanks for this series.
>
> Will read and test your patches soon. A minor comments below.
Thx, any tests and reviews are helpful.

>
> > 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@xxxxxxxxxx/T/#u
> >  - Fixup compile warning
> >    Reported-by: kernel test robot <lkp@xxxxxxxxx>
> >  - 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
>
> It's better to move these two patches ahead of patch2.
Okay.

>
> >
> >  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
> >
> > --
> > 2.36.1
> >



-- 
Best Regards
 Guo Ren