linux-kernel - Re: [PATCH 08/22] x86/srso: Downgrade retbleed IBPB warning to informational message

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Message-ID: <20230824044326.GCZObf7lYYkx0XvICT@fat_crate.local>
Date:   Thu, 24 Aug 2023 06:43:26 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Babu Moger <babu.moger@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>, David.Kaplan@....com,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        gregkh@...uxfoundation.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 08/22] x86/srso: Downgrade retbleed IBPB warning to
 informational message

On Sun, Aug 20, 2023 at 06:19:05PM -0700, Josh Poimboeuf wrote:
> This warning is nothing to get excited over.  Downgrade to pr_info().
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
> ---
>  arch/x86/kernel/cpu/bugs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
> index cda4b5e6a362..e59e09babf8f 100644
> --- a/arch/x86/kernel/cpu/bugs.c
> +++ b/arch/x86/kernel/cpu/bugs.c
> @@ -2425,7 +2425,7 @@ static void __init srso_select_mitigation(void)
>  
>  	if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
>  		if (has_microcode) {
> -			pr_err("Retbleed IBPB mitigation enabled, using same for SRSO\n");
> +			pr_info("Retbleed IBPB mitigation enabled, using same for SRSO\n");
>  			srso_mitigation = SRSO_MITIGATION_IBPB;
>  			goto pred_cmd;
>  		}
> -- 

Reviewed-by: Borislav Petkov (AMD) <bp@...en8.de>

-- 
Regards/Gruss,
    Boris.

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