linux-kernel - Re: [patch V4 part 3 12/29] x86/entry/common: Provide idtentry

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Date:   Thu, 7 May 2020 18:27:48 +0200
From:   Alexandre Chartre <alexandre.chartre@...cle.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, "Paul E. McKenney" <paulmck@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Brian Gerst <brgerst@...il.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Will Deacon <will@...nel.org>
Subject: Re: [patch V4 part 3 12/29] x86/entry/common: Provide
 idtentry_enter/exit()


On 5/5/20 3:44 PM, Thomas Gleixner wrote:
> Provide functions which handle the low level entry and exit similiar to
> enter/exit from user mode.

typo: "similiar"

> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> ---
>   arch/x86/entry/common.c         |   89 ++++++++++++++++++++++++++++++++++++++++
>   arch/x86/include/asm/idtentry.h |    3 +
>   2 files changed, 92 insertions(+)
> 
> --- a/arch/x86/entry/common.c
> +++ b/arch/x86/entry/common.c
...
> +/**
> + * idtentry_exit - Common code to handle return from exceptions
> + * @regs:	Pointer to pt_regs (exception entry regs)
> + *
> + * Depending on the return target (kernel/user) this runs the necessary
> + * preemption and work checks if possible and reguired and returns to

typo: "reguired"

alex.