From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2FE74C433EF for ; Tue, 5 Jul 2022 22:00:55 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LcxSj4hptz3c3W for ; Wed, 6 Jul 2022 08:00:53 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=alien8.de header.i=@alien8.de header.a=rsa-sha256 header.s=dkim header.b=rFDWw5O9; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=alien8.de (client-ip=5.9.137.197; helo=mail.skyhub.de; envelope-from=bp@alien8.de; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=alien8.de header.i=@alien8.de header.a=rsa-sha256 header.s=dkim header.b=rFDWw5O9; dkim-atps=neutral Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4LcxS04zRTz2xf8 for ; Wed, 6 Jul 2022 08:00:16 +1000 (AEST) Received: from zn.tnic (p200300ea970ff625329c23fffea6a903.dip0.t-ipconnect.de [IPv6:2003:ea:970f:f625:329c:23ff:fea6:a903]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 7D98D1EC0513; Wed, 6 Jul 2022 00:00:08 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1657058408; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=lOz+oyOsjcEjoVAd2V3Hhq+u+4OkEJ2jkFkxcvzXIp4=; b=rFDWw5O9FPqZ2ZGYqsf0oadvjBlURlepN3Il5jgiRH6uCMr2vSxWAKsVvY2JWqML4mf/sj K/RRPabIwevvNUNRlwHJPHF9g/MwhM4B9ks25BK+Z70zV3IxaYGx4hwS5Z15WYzM4SbxTQ ksG6jTJzlhCJibf0zj16UVr1u6l+cOo= Date: Wed, 6 Jul 2022 00:00:04 +0200 From: Borislav Petkov To: "H. Peter Anvin" Subject: Re: [PATCH] random: remove CONFIG_ARCH_RANDOM and "nordrand" Message-ID: References: <20220705190121.293703-1-Jason@zx2c4.com> <11C903CC-22A7-48EE-AD63-E71CC8D28B88@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <11C903CC-22A7-48EE-AD63-E71CC8D28B88@zytor.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, "Jason A. Donenfeld" , Arnd Bergmann , Will Deacon , Greg Kroah-Hartman , Catalin Marinas , Heiko Carstens , x86@kernel.org, linux-kernel@vger.kernel.org, Alexander Gordeev , linuxppc-dev@lists.ozlabs.org, Thomas Gleixner , linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Jul 05, 2022 at 02:50:34PM -0700, H. Peter Anvin wrote: > It's just math. The only variable is your confidence level, i.e. at > what level do you decide that the likelihood of pure chance is way > smaller than the likelihood of hardware failure. That might be but the likelyhood of certain BIOSes dropping the ball after resume is 100%: 7879fc4bdc75 ("x86/rdrand: Sanity-check RDRAND output") -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette