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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ht22-20020a170907609600b0073101e55d9fsi9574866ejc.797.2022.08.16.05.46.57; Tue, 16 Aug 2022 05:47:23 -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=dkim header.b=ly8Tp7GT; 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 S234971AbiHPMlt (ORCPT + 99 others); Tue, 16 Aug 2022 08:41:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59004 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232507AbiHPMlq (ORCPT ); Tue, 16 Aug 2022 08:41:46 -0400 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B69BA3D58 for ; Tue, 16 Aug 2022 05:41:45 -0700 (PDT) Received: from zn.tnic (p200300ea971b9855329c23fffea6a903.dip0.t-ipconnect.de [IPv6:2003:ea:971b:9855:329c: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 DBFEF1EC0258; Tue, 16 Aug 2022 14:41:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1660653699; 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=uocFOI2yc8DT4I+RzQha6VC3DcbR6nmf8NXaarE90GQ=; b=ly8Tp7GTbL2vTpXFu5Rqpi2DZxTa8mXwSUjRxz2re9zrn6ufRitaj3hGw3mZOrHPMEo+d1 b7hMSnqQmKJnoKN3+LNPv+udoklkxZPz6FVvGJT0pVkPbxs8v84RhJNVHvKEqyq5uYKI1E 3TkYtr8usZuy3F65p5o7kJepcCpvre0= Date: Tue, 16 Aug 2022 14:41:39 +0200 From: Borislav Petkov To: Ashok Raj Cc: X86 ML , Andrew Cooper , LKML , =?utf-8?Q?=C8=98tefan?= Talpalaru , Ashok Raj Subject: Re: [PATCH] x86/microcode/AMD: Attempt applying on every logical thread Message-ID: References: <20220814120026.16118-1-bp@alien8.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE 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 Tue, Aug 16, 2022 at 09:00:14AM +0000, Ashok Raj wrote: > A re-application means, you want to apply even if the cpu_rev <= patch.rev Yes. > if cpu_rev is > patch_rev, clearly its ahead?. say BIOS has a newer > version than in the initrd image, do we want to replace the BIOS > version since we do no revid checks here. Can you even downgrade the microcode through the MSR? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette