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[2620:137:e000::1:20]) by mx.google.com with ESMTP id kb16-20020a1709070f9000b00991d97d8eb5si7097239ejc.145.2023.08.14.02.44.54; Mon, 14 Aug 2023 02:45:19 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=alien8 header.b=FzRO8lyY; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232944AbjHNJKu (ORCPT + 99 others); Mon, 14 Aug 2023 05:10:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233471AbjHNJK0 (ORCPT ); Mon, 14 Aug 2023 05:10:26 -0400 Received: from mail.alien8.de (mail.alien8.de [IPv6:2a01:4f9:3051:3f93::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9E3C12D for ; Mon, 14 Aug 2023 02:10:25 -0700 (PDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 0456840E0140; Mon, 14 Aug 2023 09:10:24 +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 2ywYhGo1x0Gi; Mon, 14 Aug 2023 09:10:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1692004221; bh=Im1/DAa4v2T1osa4p05t93MBfqN5gX0V3YHLAWBwOxg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FzRO8lyYgrK1LU2VN0srN+httcc8cpVR7jcR+dd8nahECp7dvVbJN/XunXy74YwO1 ZkKKYy7IdMiMNoJ1XB8mmjl6EUouMr51QAVYxV2E2YVaMxsqILErslcIsbWcELiSDQ 16mHpQX5sT70mTMnpfg+U0XN0HHXZNECU1Ov9UyBeUvwdL5Sf/01ewFEBWWxaoAYCX Ox2cZy8tdWUAqYU4ZeYUUs816M6un1BhnUKoXDGgJ/lTT5OXBLoRdJvpeXtHGDSmGC wHnEQmhfCRwqA8byqXp/gc6WQpS0oaJIVgGS9mm9EQTuRgvxSYZzZSHmM5wJ/rV/6c +dE41i25O9EhKHetnPGevz9TQblgNX+nc9+EAsfMvoNgNQZ/igXEIZ0TK+7tEznBZJ lNwq2TbEDd+PzArPb4TZRDXO2vOPKmzjUqUKCWhmT6HV2s/L/K4LdD6AmyltQf3hFh pfQ5T+P0biqpkjTGnbtUIw1+sbysHh+Dyj4aaH30G3glY1MHSu/MCTbgdn0bjFHQHi tgsZzlNOb/jqo8ZvFbDGsQMDKvVM9mzJyrMDbHysnRn57kX11CL9gxz9ZMv/SfnkqV gd28Q3MKouXQORfIMup/6Yk+YQeyMTvy09REn4A1S5qKDrSQqKjnA2l3F72wMM+ymZ vVoBP9LwcprFmbeTo+z4rOzc= Received: from zn.tnic (pd9530d32.dip0.t-ipconnect.de [217.83.13.50]) (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 ESMTPSA id CBD2E40E0185; Mon, 14 Aug 2023 09:10:17 +0000 (UTC) Date: Mon, 14 Aug 2023 11:10:12 +0200 From: Borislav Petkov To: Xi Ruoyao Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Rainer Fiebig Subject: Re: Does srso safe RET mitigation require microcode update? Message-ID: <20230814091012.GAZNnvdD6JX/4E679D@fat_crate.local> References: <79c179acaa6ec4e1cf112ae2dfce8370694a5089.camel@xry111.site> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <79c179acaa6ec4e1cf112ae2dfce8370694a5089.camel@xry111.site> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 14, 2023 at 05:00:12PM +0800, Xi Ruoyao wrote: > So we are puzzled now: is this system vulnerable or mitigated? Read the whole options text here: https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html Does it explain it better? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette