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 5DAAD37268A; Fri, 18 Sep 2026 15:38:04 +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=1789745887; cv=none; b=kyQzTD1yxXlGBVeWYirBYuDi0Um67CpYX8/hW0zZrwQlXsdw0CY3fLAArVDIy/pbAtikwVidld57p2OseHjUZcNuFp+tMoRnuJFupgS5PabQYMybPaL2jt8DSLoTrUQXuGG1yRbJtVxXsUf/oElHdH3DDOtQSyEyqy9TyKRjdhk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789745887; c=relaxed/simple; bh=m0YxD7VmkTrQ9BK7RawhfiNW848wHmn5GitM21kxqtU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=httBAQUhh75HpOJgOMhnXNwKXRd62KlwOIJQv8mAex1LcZAxQxMT+2qVIydv13YGRGQSepu/PrQml5MB9ugEK9xh6l5f6sBy/QhuuKv/2eCyFdfTFf9NIcQOoXxTtxotUZay4zlGHD9w0fUgjyxouhTa5Ss/537dAh2qa6XyDts= 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=DOkpGsAy; 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="DOkpGsAy" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id BB0D040E022C; Fri, 18 Sep 2026 15:38:01 +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 lXDPEcajzFne; Fri, 18 Sep 2026 15:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1789745871; bh=36JNwdFzxccnGIjCQpZ9YpuxHSaUKRaCuz6LQSxaurw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=DOkpGsAyt2wg3Z5tDnHQMEL+kRzGE1upsbkmP5oTtY2s6eTk/JCU4fYUGHilG/mV0 5csSClOXi6NRBcKaJhHA3xp+tCf4ABBvHrFQTe1V5ST9s8/SQPYiI5+bE9S7FXpI7G X6jN0fRdCwTvGO/7qbjjUzVGTXxa7SKmQuz9eRp3gmePUzcRokfYcT+v3n1ivAW28H gli51IruRU6GmhDgkLapgFadw66M6AO+ZbUFyb/TRJfoEL/Us1Sm5aWwhFZyWOGn6p Spq//fSHDpbeEzccHAHlJoyPT+UBtWXpadz/PpWA+eUS5K9B6Lv+QYGIBwZ2d9K4G5 UKlqPE+pRlzayA8g59KG2yIYE2a5Txq9XpdHkQJeRMMMGT1bFQNM7CV08Dgkd329P8 3OY2KSTqQYa6XStqJttQPONUxcTcsjQGC6tS/wKP9KQvF2WxfAj7Qp5ujUu6bHfuYr W01cm55dMB0YOwiqAWD7s/zMmUtpECgDH2PPOU5TDFLva49lnffXj/tKtN3Srusjff JS8boS5f6cV8QOnSwVO9gc8ZdEAOR52pbu2t7qfNrpdkvX8LCc6IPcMw2H72QP0FvH LSflkc/kS9KmbGCp821n5+6QUgKBUJfBqfN8/XCTiz8eMq/qYG7/T1hzVpnTE2e+KR IK4arvGgttykH5XXGXqmHcUA= Received: from stx.tnic (unknown [IPv6:2600:1700:38ca:c00::48]) (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 2E94B40E00E5; Fri, 18 Sep 2026 15:37:39 +0000 (UTC) Date: Fri, 18 Sep 2026 08:37:33 -0700 From: Borislav Petkov To: Ingo Molnar Cc: "Chang S. Bae" , linux-kernel@vger.kernel.org, x86@kernel.org, tglx@kernel.org, mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com, andrew.cooper3@citrix.com, arjan.van.de.ven@intel.com, sohil.mehta@intel.com, stable@vger.kernel.org Subject: Re: [PATCH v3] x86/microcode/intel: Reject problematic loading on Granite Rapids systems Message-ID: <20260918153733.GAaq1avUE5atQ6yfKT@fat_crate.local> References: <20260908223209.916758-1-chang.seok.bae@intel.com> <20260916225939.1144524-1-chang.seok.bae@intel.com> 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 Fri, Sep 18, 2026 at 08:54:01AM +0200, Ingo Molnar wrote: > It should at minimum say something like: > > Erratum GNR98: new revision %x is unsafe to apply until 0x1000405 is applied first, skipping it. Please upgrade firmware tools. Even if you put prose in a warning message, it still doesn't explain the issue fully. For stuff like that you need some properly written longer explanation in the documentation. Which I'm hoping we'll get eventually once the dust has settled down. That's what the rest of this thread is trying to do but I haven't reviewed yet. > So this patch is still problematic IMO. This patch is a minimal stable fix to stop it from #MCing. The real stuff comes later. It all has been discussed on this very thread. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette