linux-kernel - Re: [RFC PATCH 0/8] EDAC, mce_amd: Add a tracepoint for the decoded error

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20170728153810.GA29635@nazgul.tnic>
Date:   Fri, 28 Jul 2017 17:38:10 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tony Luck <tony.luck@...el.com>
Cc:     linux-edac <linux-edac@...r.kernel.org>,
        Yazen Ghannam <Yazen.Ghannam@....com>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/8] EDAC, mce_amd: Add a tracepoint for the decoded
 error

On Fri, Jul 28, 2017 at 05:08:50PM +0200, Borislav Petkov wrote:
> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
> index 6dde0497efc7..9486a2ca6556 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
> @@ -162,6 +162,9 @@ void mce_register_decode_chain(struct notifier_block *nb)
>  
>  	atomic_inc(&num_notifiers);
>  
> +	if (nb->priority == MCE_PRIO_DECODER)
> +		mca_cfg.has_decoder = true;
> +
>  	blocking_notifier_chain_register(&x86_mce_decoder_chain, nb);
>  }
>  EXPORT_SYMBOL_GPL(mce_register_decode_chain);

Forgot the counterpart:

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 9486a2ca6556..974e9c931e6f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -173,6 +173,9 @@ void mce_unregister_decode_chain(struct notifier_block *nb)
 {
 	atomic_dec(&num_notifiers);
 
+	if (nb->priority == MCE_PRIO_DECODER)
+		mca_cfg.has_decoder = false;
+
 	blocking_notifier_chain_unregister(&x86_mce_decoder_chain, nb);
 }
 EXPORT_SYMBOL_GPL(mce_unregister_decode_chain);

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--