[PATCH V2 0/6] riscv: Add GENERIC_ENTRY, IRQ_STACKS support
Jisheng Zhang
jszhang at kernel.org
Mon Sep 5 06:18:01 PDT 2022
On Sun, Sep 04, 2022 at 03:26:31AM -0400, guoren at kernel.org wrote:
> From: Guo Ren <guoren at 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
Amazing! You read my mind. I planed to do similar series this week, as
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.
> 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 at 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
It's better to move these two patches ahead of patch2.
>
> 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
>
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