From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B9591A9F83 for ; Fri, 27 Feb 2026 16:33:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772210013; cv=none; b=nfZ3F4hWAPF7b0FUSgAv8GdUb8YFqwsyxZI5LIfkfcW/MCTNNpOH1f3e+WxCU0sTFC9gxsJip61lk7qQpnLHNUCxXkTHLBmWp7Jb+W0z7wj606Gybap+DQ/lDk+kNfbC8bcOg5mluDc1HVnJM1vn5poagRCeHb6GTtsI7dBWZuY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772210013; c=relaxed/simple; bh=ulOVZMOFKnqwSi7o+1/k5R+YDp5d3NtvHEUeoUZXTRg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pqxnS/ct1K20/VeLRliSnePvJ0N2AyKBzwS26SlSC2IrSciEwIFx1ssncBZkj8evZFaeCgQx7ZrUoybHLgqFNNYAPQXPzm6CyS6Xx0OYVeXBb0mQSJToynJx2/pTo59+jrAGGCSHEEVZZqYMdIlvJvrwWFpBvdDkIxjp6fCKPA8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=elKFaCuv; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="elKFaCuv" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id D910840E0140; Fri, 27 Feb 2026 16:33:20 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id mqMMLt6SNQZd; Fri, 27 Feb 2026 16:33:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1772209996; bh=bkNTc1tEuLOH6fSqqbn5p8dzSmH0WxHAu+K3zC4Eexc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=elKFaCuvzvh7ylVH9/8jDZRqUhX7J8zQ5S70z1PynwXytJOTOJclLvvyLrV0kar7K mA/uQkqo/xm44Aqs59a5xuLOu8uSg92EAJZM3dhsLhYllQSzW/NhEeT+cpdlmGKAko ea0OI03+eJpF7EqsGWzgiQf9RIVhu/2F0J+HGSaPAWTNbBnchE6w8qzOFRq0tks7tV e4FsuMiH4YSy6PL37HLx3ndjz7ZSgGvnudi1ibZDyVJflX8IQ6SuA6/NZD0fSfVz9n b9zm6XxurKujty9NoIbTrcBI9OyRKWM5N3QxF/wGmKsDJyJACu8Hz1mhFmYddtks0Y 4HzM5FBiAIZ/1Yo5DTTbuhE1hhM/XI1a5O+rRkIb8PXm268Be5f02fP2OwBN/aX6JJ QhqQ4Fw/UuUJdlsaFTp2V+4S0yfLWDaVSSRYWGVNhm3zt8E7hPTbDueAdmNc7SGafq 1gvZ88RhdCIePVb5YSFLaKEvBLe4eF6ButiKS82gfbpHwNrV//d4UdsW1EdafwiAjJ oZZG9FdIgNCN0xFMVJi+YHYY5ZJzE6/N8a1lHl68UNIO+NDP3aaazJZKXx5DsxRQiM db4V4q9TShkUDaR1pm28h5yylaNSGt5YowiNMTrvtpvC1iuDEfaPcHgigqdovxjirt zaVvtGaV/KampuBXkG63Jmf0= Received: from zn.tnic (pd9530d5e.dip0.t-ipconnect.de [217.83.13.94]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with UTF8SMTPSA id 6EC0040E016E; Fri, 27 Feb 2026 16:33:06 +0000 (UTC) Date: Fri, 27 Feb 2026 17:32:57 +0100 From: Borislav Petkov To: "Luck, Tony" Cc: "Li, Xiaoyao" , Rong Zhang , Thomas Gleixner , Ingo Molnar , Dave Hansen , "x86@kernel.org" , "H. Peter Anvin" , Fenghua Yu , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH -v2] x86/split_lock: Restructure the unwieldy switch-case in sld_state_show() Message-ID: <20260227163257.GAaaHHOSZEB249kKsw@fat_crate.local> References: <20251215182907.152881-1-i@rong.moe> <20260104191726.GEaVq8xqi0OhsIs284@fat_crate.local> <20260107112835.GBaV5DY1sc3HeLKINb@fat_crate.local> <20260108103850.GAaV-JOgVZNHuZIkBh@fat_crate.local> <20260226145033.GAaaBduQ0rWXydOkAm@fat_crate.local> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Thu, Feb 26, 2026 at 01:01:44PM -0800, Luck, Tony wrote: > Only need the cpuhp_setup_state() for the sld_state == sld_warn case. > > > + if (boot_cpu_has(X86_FEATURE_SPLIT_LOCK_DETECT)) { > > + pr_info("#AC: crashing the kernel on kernel split_locks and %s on user-space split_locks\n", action); > > + > if (sld_state == sld_warn) { Remember that simplification? https://lore.kernel.org/r/SJ1PR11MB6083BFCB1FFCE6DFE6F40D38FC84A@SJ1PR11MB6083.namprd11.prod.outlook.com -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette