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Date:   Tue, 24 Mar 2020 13:26:03 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        Paul McKenney <paulmck@kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        "Steven Rostedt (VMware)" <rostedt@goodmis.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Brian Gerst <brgerst@gmail.com>,
        Juergen Gross <jgross@suse.com>,
        Alexandre Chartre <alexandre.chartre@oracle.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Paolo Bonzini <pbonzini@redhat.com>, kvm@vger.kernel.org
Subject: Re: [RESEND][patch V3 03/23] vmlinux.lds.h: Create section for
 protection against instrumentation
Message-ID: <20200324122603.GD22931@zn.tnic>
References: <20200320175956.033706968@linutronix.de>
 <20200320180032.708673769@linutronix.de>
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Just typos:

On Fri, Mar 20, 2020 at 06:59:59PM +0100, Thomas Gleixner wrote:
> Some code pathes, especially the low level entry code, must be protected

s/pathes/paths/

> against instrumentation for various reasons:
> 
>  - Low level entry code can be a fragile beast, especially on x86.
> 
>  - With NO_HZ_FULL RCU state needs to be established before using it.
> 
> Having a dedicated section for such code allows to validate with tooling
> that no unsafe functions are invoked.
> 
> Add the .noinstr.text section and the noinstr attribute to mark
> functions. noinstr implies notrace. Kprobes will gain a section check
> later.
> 
> Provide also two sets of markers:
> 
>  - instr_begin()/end()
> 
>    This is used to mark code inside in a noinstr function which calls

s/in //

>    into regular instrumentable text section as safe.
> 
>  - noinstr_call_begin()/end()
> 
>    Same as above but used to mark indirect calls which cannot be tracked by
>    tooling and need to be audited manually.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette