linux-kernel - Re: [PATCH v15 2/3] virt: Add TDX guest driver

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Message-ID: <CAAq0SU=w-upGGstmQgTh63zGqLZnEy1OpF+9FwAjSWMuyYyXTg@mail.gmail.com>
Date:   Mon, 24 Oct 2022 09:57:53 -0300
From:   Wander Lairson Costa <wander@...hat.com>
To:     Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc:     Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Shuah Khan <shuah@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        "H . Peter Anvin" <hpa@...or.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        Kai Huang <kai.huang@...el.com>,
        Isaku Yamahata <isaku.yamahata@...il.com>,
        marcelo.cerri@...onical.com, tim.gardner@...onical.com,
        khalid.elmously@...onical.com, philip.cox@...onical.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-doc@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v15 2/3] virt: Add TDX guest driver

On Sun, Oct 23, 2022 at 1:13 PM Sathyanarayanan Kuppuswamy
<sathyanarayanan.kuppuswamy@...ux.intel.com> wrote:
>
>
>
> On 10/20/22 9:39 PM, Greg Kroah-Hartman wrote:
> >>> You are allowing userspace to spam the kernel logs, please do not do
> >>> that.
> >> Added it to help userspace understand the reason for the failure (only for
> >> the cases like request param issues and TDCALL failure). Boris recommended
> >> adding it in the previous review.
> > Again, you just created a vector for userspace to spam the kernel log.
> > No kernel driver should ever do that.
> >
>
> Brois, any comments? Do you also agree?
>

Maybe dev_err_once() does the job?