linux-kernel - Re: [PATCH] loongarch: irq: Move to generic_handle_arch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAJF2gTT5n=YdNVHfgr3JqW_pyNJ+4-5uw0i9AMT0DLU2CzBjtg@mail.gmail.com>
Date:   Sat, 13 Aug 2022 18:21:40 +0800
From:   Guo Ren <guoren@...nel.org>
To:     chenhuacai@...nel.org, kernel@...0n.name, zhangqing@...ngson.cn,
        arnd@...db.de, linux-arch@...r.kernel.org, mark.rutland@....com,
        frederic@...nel.org
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        jiaxun.yang@...goat.com, yangtiezhu@...ngson.cn,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH] loongarch: irq: Move to generic_handle_arch_irq

Sorry for the noise, loongarch selects GENERIC_ENTRY, and it has
called irqentry_enter(). So calling generic_handle_arch_irq would
cause duplicate ct_irq_enter calling.

All abandoned, and I would have a look at generic_handle_arch_irq.

On Sat, Aug 13, 2022 at 5:06 PM Guo Ren <guoren@...nel.org> wrote:
>
> Abandon this patch because of the wrong commit log. Please see
> "[RESEND PATCH] loongarch: irq: Move to generic_handle_arch_irq".
>
> On Sat, Aug 13, 2022 at 4:58 PM <guoren@...nel.org> wrote:
> >
> > From: Guo Ren <guoren@...ux.alibaba.com>
> >
> > No reason to keep custom handle_loongarch_irq, and move to the generic
> > one. No reason to keep custom handle_loongarch_irq, and move to the
> > generic one. The patch also the fixup HAVE_CONTEXT_TRACKING_USER
> > feature, because handle_loongarch_irq missed ct_irq_enter/exit.
> >
> > Fixes: 0603839b18f4 ("LoongArch: Add exception/interrupt handling")
> > Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
> > Signed-off-by: Guo Ren <guoren@...nel.org>
> > ---
> >  arch/loongarch/kernel/traps.c | 15 ++-------------
> >  1 file changed, 2 insertions(+), 13 deletions(-)
> >
> > diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c
> > index aa1c95aaf595..06211640ba1f 100644
> > --- a/arch/loongarch/kernel/traps.c
> > +++ b/arch/loongarch/kernel/traps.c
> > @@ -588,17 +588,6 @@ asmlinkage void cache_parity_error(void)
> >         panic("Can't handle the cache error!");
> >  }
> >
> > -asmlinkage void noinstr handle_loongarch_irq(struct pt_regs *regs)
> > -{
> > -       struct pt_regs *old_regs;
> > -
> > -       irq_enter_rcu();
> > -       old_regs = set_irq_regs(regs);
> > -       handle_arch_irq(regs);
> > -       set_irq_regs(old_regs);
> > -       irq_exit_rcu();
> > -}
> > -
> >  asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
> >  {
> >         register int cpu;
> > @@ -608,7 +597,7 @@ asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
> >         cpu = smp_processor_id();
> >
> >         if (on_irq_stack(cpu, sp))
> > -               handle_loongarch_irq(regs);
> > +               generic_handle_arch_irq(regs);
> >         else {
> >                 stack = per_cpu(irq_stack, cpu) + IRQ_STACK_START;
> >
> > @@ -619,7 +608,7 @@ asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
> >                 "move   $s0, $sp                \n" /* Preserve sp */
> >                 "move   $sp, %[stk]             \n" /* Switch stack */
> >                 "move   $a0, %[regs]            \n"
> > -               "bl     handle_loongarch_irq    \n"
> > +               "bl     generic_handle_arch_irq \n"
> >                 "move   $sp, $s0                \n" /* Restore sp */
> >                 : /* No outputs */
> >                 : [stk] "r" (stack), [regs] "r" (regs)
> > --
> > 2.36.1
> >
>
>
> --
> Best Regards
>  Guo Ren



-- 
Best Regards
 Guo Ren