Received: by 2002:a05:7412:da14:b0:e2:908c:2ebd with SMTP id fe20csp252792rdb; Fri, 6 Oct 2023 02:21:41 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE/wYzAChhWRAmw2NWsoyXYVIVgFM1g7hEY/fLjlfthPJnmYSt+Gls81a034sHyWDy24y0h X-Received: by 2002:a05:6358:42a6:b0:145:6e16:fa8f with SMTP id s38-20020a05635842a600b001456e16fa8fmr6604866rwc.13.1696584101427; Fri, 06 Oct 2023 02:21:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1696584101; cv=none; d=google.com; s=arc-20160816; b=IR4lzkAiNe3jSkY+InrSBcTfCgtnkl86HkNy4kRHqKa7KJQ95wU5uJGwMkkj1jgIvK EEKVP2GFB5DXi2Dvi1Su5TImntES/hXMhNyrjCkDtInpisnV6L1kJPZUrXBwpD2en+jF faymqdOtl0GqkBAsm+q8EcVxDfFDg2yq4/ULim28XxgMOAP82bSdi/fKokLyh7v9DG6x S9N7b4qsrQ4e1B13di0RczGA5ISyOa3B5Vn6jplZppowFFkOKu4ReJfEEVTL+xI7lIoz wkCBXNUThXM8f2IR59UMsjwr2p3ee+la6Rnk576WhjaPXUHbUXeCfEatoYfTuHcg0AhE f3Rw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:to:references:message-id :content-transfer-encoding:cc:date:in-reply-to:from:subject :mime-version:dkim-signature; bh=gg4F1C7Bsnu8VL38dBFamcZXf6mHSEPhxMJxJeziYtc=; fh=RGHaMbDko9suw/oQPGxOXnFxfheDBIGVguYLXYE/0H4=; b=gy61cb4FtaIbJcQC2kJO6TfvYxblWet3YrvJdUlvguNDP0dlM/O/Nig9YbUNlB309O VIEL79+8xtwLBxz1C8K+mD3BLTmdLXHUrRiX8fG/tIxp6l/cANawZwKRtOZIuM9k8KmI JuCQXxY3cHWfMlrh5LalYV/NCvSbbkuJWxvu5gVMlHuOv8BjUZLAS/vh3GKUjeCM3Oyw Q76GmAadzWyNIcxPKYBe7afjStYJqlfJjSeZrwitiZWhqVCGKpNgQ7MgeCLXapbD+H1K GJ73A2qBnutmFWFv69DAi2FzwvIB7HBxj5JqvOZPiWap3Ar740TBxqGUxMerGDdGsotG llag== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@exactco.de header.s=x header.b=eyMJ9Yd+; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from agentk.vger.email (agentk.vger.email. [23.128.96.32]) by mx.google.com with ESMTPS id np1-20020a17090b4c4100b002740f8fa612si3649428pjb.21.2023.10.06.02.21.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Oct 2023 02:21:41 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) client-ip=23.128.96.32; Authentication-Results: mx.google.com; dkim=pass header.i=@exactco.de header.s=x header.b=eyMJ9Yd+; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by agentk.vger.email (Postfix) with ESMTP id 265C98095663; Fri, 6 Oct 2023 02:21:39 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at agentk.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231408AbjJFJVb (ORCPT + 99 others); Fri, 6 Oct 2023 05:21:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231361AbjJFJVa (ORCPT ); Fri, 6 Oct 2023 05:21:30 -0400 Received: from mx.exactcode.de (mx.exactcode.de [144.76.154.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF4DB93 for ; Fri, 6 Oct 2023 02:21:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=exactco.de; s=x; h=To:References:Message-Id:Content-Transfer-Encoding:Cc:Date:In-Reply-To:From:Subject:Mime-Version:Content-Type; bh=gg4F1C7Bsnu8VL38dBFamcZXf6mHSEPhxMJxJeziYtc=; b=eyMJ9Yd+IKSVAouTHCd188prtAeyCSj0j3As3xau7nYPE7vjK/u065XSpsnBqfQzGLX+5UsjvQFzRAZfluQVewIAdAZPmoBGdtsHW4RcX18cm9m5otHGMKFoOp+sjR9nJHAY8YIrFg0FCiaNmazHn767apxv1ln30Hm8ENEdVAE=; Received: from exactco.de ([90.187.5.221]) by mx.exactcode.de with esmtp (Exim 4.82) (envelope-from ) id 1qoh24-0000nQ-DB; Fri, 06 Oct 2023 09:22:04 +0000 Received: from [192.168.2.109] (helo=smtpclient.apple) by exactco.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86_2) (envelope-from ) id 1qoh34-0001JV-Sg; Fri, 06 Oct 2023 09:23:07 +0000 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.400.51.1.1\)) Subject: Re: [RFC] AMD Zen4 CPU bug? Spurious SMT Sibling Invalid Opcode Speculation From: =?utf-8?Q?Ren=C3=A9_Rebe?= In-Reply-To: <20231004222511.GHZR3mR/oNFZuJGB9P@fat_crate.local> Date: Fri, 6 Oct 2023 11:21:13 +0200 Cc: linux-kernel@vger.kernel.org, x86@kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <797F7A00-541E-4333-B653-1120DF5C56B1@exactcode.com> References: <20231004222511.GHZR3mR/oNFZuJGB9P@fat_crate.local> To: Borislav Petkov X-Mailer: Apple Mail (2.3731.400.51.1.1) X-Spam-Score: -1.6 (-) X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Fri, 06 Oct 2023 02:21:39 -0700 (PDT) Hi, > On 5. Oct 2023, at 00:25, Borislav Petkov wrote: >=20 > On Wed, Oct 04, 2023 at 05:29:32PM +0200, Ren=C3=A9 Rebe wrote: >> during cross compiling our =E2=80=9CEmbedded=E2=80=9D Linux = Distribution T2 (https://t2sde.org) I observers some random illegal = instruction build errors since we got ourselves a Ryzen 7950x on launch = day a year ago: >=20 > Thanks for reporting. I'm looking into it. Thank you Borislav, were you able to reproduce this on Zen 4 you have = access to? Thanks, Ren=C3=A9 -- ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin http://exactcode.com | http://exactscan.com | http://ocrkit.com