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mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from BYAPR11MB3768.namprd11.prod.outlook.com (2603:10b6:a03:fa::20) by LV2PR11MB5974.namprd11.prod.outlook.com (2603:10b6:408:17e::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5791.22; Fri, 4 Nov 2022 06:15:15 +0000 Received: from BYAPR11MB3768.namprd11.prod.outlook.com ([fe80::f980:8dbd:ddf0:11c0]) by BYAPR11MB3768.namprd11.prod.outlook.com ([fe80::f980:8dbd:ddf0:11c0%4]) with mapi id 15.20.5791.022; Fri, 4 Nov 2022 06:15:15 +0000 Message-ID: Date: Thu, 3 Nov 2022 23:15:12 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.4.1 Subject: Re: [PATCH 07/14] x86/microcode/intel: Expose microcode_sanity_check() Content-Language: en-US To: Borislav Petkov CC: , , , , , , , , , , , , , , , References: <20221021203413.1220137-1-jithu.joseph@intel.com> <20221021203413.1220137-8-jithu.joseph@intel.com> From: "Joseph, Jithu" In-Reply-To: Content-Type: text/plain; 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We hear your concern that IFS test images are not yet publicly available for testing. We are working on it and it should be available in the near future. > > And yes, right now that function should be doing the SDM-sanctioned > dance about verifying the table and thus should also be generic but > judging from past experience, things do get different in time and > implementations do get changed so even if it is a trivial change to > microcode_sanity_check(), we would still need to test the IFS driver > too. > > So I'm wondering if it wouldn't be simply easier on everyone involved if > you just copy the bits you need into your driver and use them there as > you wish. > > Then the testing burden won't be an issue and there won't be any > potential cross-breakages. > We further hear your concern of potential cross-breakages due to IFS and Intel Microcode update driver sharing common functionality (like find_matching_signature() and microcode_sanity_check()). Within Intel, microcode and IFS folks do work closely, limiting the chances of this being introduced from Intel side. If these doesn’t alleviate your concern, I will post v2 without exporting the aforementioned functions and implementing them separately in IFS driver as you suggested. Jithu