Date:   Mon, 20 Feb 2023 10:59:57 -0800
From:   Josh Poimboeuf <jpoimboe@kernel.org>
To:     KP Singh <kpsingh@kernel.org>
Cc:     Borislav Petkov <bp@alien8.de>, linux-kernel@vger.kernel.org,
        pjt@google.com, evn@google.com, tglx@linutronix.de,
        mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org,
        hpa@zytor.com, peterz@infradead.org,
        pawan.kumar.gupta@linux.intel.com, kim.phillips@amd.com,
        alexandre.chartre@oracle.com, daniel.sneddon@linux.intel.com,
        =?utf-8?B?Sm9zw6k=?= Oliveira <joseloliveira11@gmail.com>,
        Rodrigo Branco <rodrigo@kernelhacking.com>,
        Alexandra Sandulescu <aesa@google.com>,
        Jim Mattson <jmattson@google.com>, stable@vger.kernel.org
Subject: Re: [PATCH] x86/bugs: Allow STIBP with IBRS
Message-ID: <20230220185957.yzjdnhcqpmkji2xs@treble>
References: <20230220120127.1975241-1-kpsingh@kernel.org>
 <20230220121350.aidsipw3kd4rsyss@treble>
 <CACYkzJ5L9MLuE5Jz+z5-NJCCrUqTbgKQkXSqnQnCfTD_WNA7_Q@mail.gmail.com>
 <CACYkzJ6n=-tobhX0ONQhjHSgmnNjWnNe_dZnEOGtD8Y6S3RHbA@mail.gmail.com>
 <20230220163442.7fmaeef3oqci4ee3@treble>
 <Y/Ox3MJZF1Yb7b6y@zn.tnic>
 <20230220175929.2laflfb2met6y3kc@treble>
 <CACYkzJ71xqzY6-wL+YShcL+d6ugzcdFHr6tbYWWE_ep52+RBZQ@mail.gmail.com>
 <20230220182717.uzrym2gtavlbjbxo@treble>
 <CACYkzJ5z3qLhkWqKLvP55HcjLACzAJbFjc4XjRzcft9ww40MaQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CACYkzJ5z3qLhkWqKLvP55HcjLACzAJbFjc4XjRzcft9ww40MaQ@mail.gmail.com>
Precedence: bulk

On Mon, Feb 20, 2023 at 10:33:56AM -0800, KP Singh wrote:
>  static char *stibp_state(void)
>  {
> -       if (spectre_v2_in_ibrs_mode(spectre_v2_enabled))
> +       if (!spectre_v2_user_needs_stibp(spectre_v2_enabled))
>                 return "";
> 
>         switch (spectre_v2_user_stibp) {
> 
> Also Josh, is it okay for us to have a discussion and have me write
> the patch as a v2? Your current patch does not even credit me at all.
> Seems a bit unfair, but I don't really care. I was going to rev up the
> patch with your suggestions.

Well, frankly the patch needed a complete rewrite.  The patch
description was unclear about what the problem is and what's being
fixed.  The code was obtuse and the comments didn't help.  I could tell
by the other replies that I wasn't the only one confused.

I can give you Reported-by, or did you have some other tag in mind?

-- 
Josh