From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=44.246.68.102 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792434441; b=Fs2H1XuqKyCYQUz3P9VUkVf0vx8TVOfqUQrqiUvdwfNrSTf1sS9C3D1faXIpEvGwPTpx /BMOibwXZlecnoq6GpVzzRomwaMHEUNlveBJ1S/jV4H7VNmxTCHujP/rkvc1bWpJ4eSPn mtnMa/RMQA+q/onKLzH8p51glFxRFFYCVFJFGbGuRsKyi+Qx97QzfsdmjmaBli3PqZtGx qzc2kqu6GygvfngukCstlzoYFkOPbtiP9GvAWUjzF7Rq8eXeCIRoNBsEkktE0QOAW8FpC 9l4ef7K5yC2CcII+lwKpMoV3NNrVctmU1H5eMZiIp81kU+LgG7B0E1z6rfqbxoWpv1w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792434441; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:Received:Received:X-Farcaster-Flow-ID:Received:Received: From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:Content-Type:X-Originating-IP: X-ClientProxiedBy; bh=o7FjhCPmXbZMctj//JJUrqZDv3+6C4QkSctbr92ltS4=; b=0i+K15gAEYl85N3NEws9BGgyZ9d5XC2JtIYDOewSK2xSeW7tbwkZ5x+ZKCdynW/+FbfO YRRF0eWDCOYaH9BOHCrPoMmfaWJ2c6bxiwQb/qjJjJ4vvwp9niWraiJDtsRuJaUrRkOql LZfKI3RT3o2T2wclNNRO0Abh7sD58XcKJc+5Ldt5hH0CS44BQoIapjTWsIa2Ucc4v+XHf RqETZrGehI3gzamtvKmH+4knhUmKhLu+4mkaCb6Muwrfv7jrt8KJgBqVtUztYOt7H//ef 8fe8aR8DbVggymMWwxDGzXJZyQx5SniJYBXdPHbtrKFI5HUsIg5ycaUm8fLz0llFa8g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=amazon.com; spf=pass smtp.mailfrom=amazon.com; dkim=pass header.d=amazon.com header.i=@amazon.com header.a=rsa-sha256 header.s=amazoncorp2 header.b=oH3p538Z; arc=none smtp.remote-ip=44.246.68.102 Received: from pdx-out-003.esa.us-west-2.outbound.mail-perimeter.amazon.com (pdx-out-003.esa.us-west-2.outbound.mail-perimeter.amazon.com [44.246.68.102]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6030A60A3813; Mon, 19 Oct 2026 18:27:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 6030A60A3813 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=amazon.com header.i=@amazon.com header.a=rsa-sha256 header.s=amazoncorp2 header.b=oH3p538Z DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1792434441; x=1823970441; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=o7FjhCPmXbZMctj//JJUrqZDv3+6C4QkSctbr92ltS4=; b=oH3p538ZTD5/l7e77CmFIHq0F9dxPTTW4f9HVFOoch++Cq07C6vWAvj+ St0rns20FgCGYE/DW3B6TQnY1Pwd3O/75oHZFWhPlfnaRTjxK74wvwhMB 1LS9CUGHyeHo1dCEE6WspjoSp0l8BEVdqhnyGbQOtzNcFZrtnV9fCxF3h FWfVe0T7rzRXNDJESOxQ/Us+Rq2qY4359+RK4ganH4Yvo3qQmIHFg+dZ1 6WGZioofTGbp3ATKANujTU+O6/dWStSx8nqWf8iR4Xbg6xbTSspupKH5D 1qb52nab9Qm9wExMdj6PLYj6oDVIYz71ua/dVSEy/hJ6Er8cFTx6e1kNY A==; X-CSE-ConnectionGUID: gSdzwmxRTyquCVYkuPh3sA== X-CSE-MsgGUID: Jy32Wv5ETNCvryrbhGyOag== X-IronPort-AV: E=Sophos;i="6.27,167,1787011200"; d="scan'208";a="31587261" Received: from ip-10-5-6-203.us-west-2.compute.internal (HELO smtpout.naws.us-west-2.prod.farcaster.email.amazon.dev) ([10.5.6.203]) by internal-pdx-out-003.esa.us-west-2.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2026 18:27:17 +0000 Received: from EX19MTAUWA002.ant.amazon.com [205.251.233.178:15353] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.51.105:2525] with esmtp (Farcaster) id 2998b543-fa1d-4238-a539-40ba3ca3ede5; Mon, 19 Oct 2026 18:27:17 +0000 (UTC) X-Farcaster-Flow-ID: 2998b543-fa1d-4238-a539-40ba3ca3ede5 Received: from EX19D001UWA001.ant.amazon.com (10.13.138.214) by EX19MTAUWA002.ant.amazon.com (10.250.64.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.49; Mon, 19 Oct 2026 18:27:17 +0000 Received: from dev-dsk-surenkj-2b-416930d2.us-west-2.amazon.com (10.169.26.94) by EX19D001UWA001.ant.amazon.com (10.13.138.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.53; Mon, 19 Oct 2026 18:27:16 +0000 From: Surendran Kanagaraj To: CC: , , , , , , , , Subject: Re: [PATCH v2 2/2] tpm_crb: Raise durations for Amazon NitroTPM Date: Mon, 19 Oct 2026 18:27:13 +0000 Message-ID: <20261019182713.57308-1-surenkj@amazon.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EX19D031UWA002.ant.amazon.com (10.13.139.96) To EX19D001UWA001.ant.amazon.com (10.13.138.214) On Sat, Oct 17, 2026 at 03:40:25AM +0300, Jarkko Sakkinen wrote: > On Sat, Oct 17, 2026 at 03:31:32AM +0300, Jarkko Sakkinen wrote: > > Yeah so this needs a bit more redesign and while it is a possible > > way to address all these issues I don't believe it is best possible > > way imaginable to do something that lasts long-term. > > > > I don't want to go into concrete proposals because then I would have > > to really engineer the whole change while at it because I would > > likely try a number of approaches out. I.e. just a bit more effort > > and innovation please. > > I can give this: > > 1. Map the whole flow how we fluctuate values of durations. > 2. Think that if you were starting from zero how would you design a > unified and coherent flow. This includes all the callbacks and both TPM > 1.x and TPM 2.0. > 3. Redo the flow based on that premise. > > I.e., break more things with consideration and if it goes over the > top then we attenuate the changes where needed. Thanks for the pointers Jarkko. Will work out a design and send a proposal. Surendran