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Date:   Mon, 3 Jul 2023 11:29:41 +0100
From:   Daniel Thompson <daniel.thompson@linaro.org>
To:     guoren@kernel.org
Cc:     arnd@arndb.de, palmer@rivosinc.com, tglx@linutronix.de,
        peterz@infradead.org, luto@kernel.org, conor.dooley@microchip.com,
        heiko@sntech.de, jszhang@kernel.org, lazyparser@gmail.com,
        falcon@tinylab.org, chenhuacai@kernel.org, apatel@ventanamicro.com,
        atishp@atishpatra.org, mark.rutland@arm.com, bjorn@kernel.org,
        palmer@dabbelt.com, bjorn@rivosinc.com, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        stable@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH] riscv: entry: Fixup do_trap_break from kernel side
Message-ID: <20230703102941.GA4328@aspen.lan>
References: <20230702025708.784106-1-guoren@kernel.org>
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On Sat, Jul 01, 2023 at 10:57:07PM -0400, guoren@kernel.org wrote:
> From: Guo Ren <guoren@linux.alibaba.com>
>
> The irqentry_nmi_enter/exit would force the current context into in_interrupt.
> That would trigger the kernel to dead panic, but the kdb still needs "ebreak" to
> debug the kernel.
>
> Move irqentry_nmi_enter/exit to exception_enter/exit could correct handle_break
> of the kernel side.

<snip>

> Fixes: f0bddf50586d ("riscv: entry: Convert to generic entry")
> Reported-by: Daniel Thompson <daniel.thompson@linaro.org>
> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> Signed-off-by: Guo Ren <guoren@kernel.org>
> Cc: stable@vger.kernel.org

I pushed this though the kgdb test suite that originally found the
problem (although it didn't occur to me when I reported it that
the problem was nothing to do with kgdb ;-) ). So FWIW:

Tested-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.