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Miller" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-crypto@vger.kernel.org" , Theodore Ts'o Subject: Re: [PATCH V2 3/3] arm64: defconfig: Enable CRYPTO_DEV_FSL_CAAM Thread-Topic: [PATCH V2 3/3] arm64: defconfig: Enable CRYPTO_DEV_FSL_CAAM Thread-Index: AQHVscuAzDa0y7DjIUSGaSZVWPlDjw== Date: Fri, 20 Dec 2019 08:07:34 +0000 Message-ID: References: <20191213153910.11235-1-aford173@gmail.com> <20191213153910.11235-3-aford173@gmail.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=horia.geanta@nxp.com; x-originating-ip: [212.146.100.6] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: a2594434-e66a-43f3-9106-08d78523aba2 x-ms-traffictypediagnostic: VI1PR0402MB2832:|VI1PR0402MB2832: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7691; x-forefront-prvs: 025796F161 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(396003)(366004)(39860400002)(376002)(346002)(136003)(189003)(199004)(4326008)(44832011)(66446008)(66476007)(64756008)(66556008)(7416002)(91956017)(478600001)(66946007)(81166006)(81156014)(8676002)(8936002)(86362001)(9686003)(53546011)(33656002)(55016002)(52536014)(54906003)(316002)(110136005)(2906002)(76116006)(7696005)(71200400001)(5660300002)(6506007)(186003)(26005);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR0402MB2832;H:VI1PR0402MB3485.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: WfQ8ToIh0zYfUfEFnVhGnI5P/QihfhSMtw/GlHuKXZhRQLaxmIMSTH5i+E8WPletVoyEtW19UoyN7XB8sv/pzgi+kiZ33sat1lGMFZCK79woIVu5Fs3UVj296y6tU2ot0vCb7QlEQ1CSsGfeQQVMCj7tnxPLZNWytFRhrmb66ZHfUMjYUvIIKVp+58XlaVHjulhawX8sO3FNxSGdraLB5inJ+i43TQH/K/bbVuGGM8XcpVzifV29jpMfMumBCqTGkTf5TfJM5moLgyNmoyCmw6tKRqWxIe4djcXdVIVn8/PNKM0EYCFfCWNl6vbbjP05iTqr8qQu+ufvwL9MWDPr/LKWmx3swholi2vyxPXsFVfblRBnCT8tc8qhC9BklNENTi0eCuy8Zs4WvGl1mtDss2edHn5gwODznChlET1zxKLA9mcm1JDiVOHop43/XgOl Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a2594434-e66a-43f3-9106-08d78523aba2 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Dec 2019 08:07:34.4904 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: peDjrjfV/quQQ8bOvYdtcIcFqri+oy+W6VDaUegtGT4V6ZPj8vLmoPJCjYMlYKu20VRHurTssIx8H3kT9ugJhQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB2832 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 12/17/2019 8:25 PM, Fabio Estevam wrote:=0A= > Hi Adam,=0A= > =0A= > On Tue, Dec 17, 2019 at 10:07 AM Adam Ford wrote:=0A= > =0A= >> Out of curiosity, what is the rule for when things are 'm' vs 'y'?=0A= >>=0A= >> In the Code Aurora repo, it is set to 'y' and the mainline kernel for=0A= >> the i.MX6/7, the imx_v6_v7_defconfig is also set to 'y' which is why I= =0A= >> used 'y' here.=0A= >>=0A= >> I can do a V3 to address the other items you noted, but I want to=0A= >> understand the rules about the defconfig so I don't make the same=0A= >> mistake again.=0A= > =0A= > In arch/arm64/configs/defconfig we try to select modules whenever possibl= e.=0A= > =0A= > The exceptions are drivers that are vital for boot such as PMIC,=0A= > pinctrl, clks, etc.=0A= > =0A= > The CAAM driver does not fall into this category, so selecting it as=0A= > module is preferred here.=0A= > =0A= One comment here though.=0A= =0A= CAAM's RNG is not "vital" for booting, but IIUC it would decrease the boot = time=0A= since it feeds the entropy pool through the hwrng interface.=0A= =0A= Once RNG driver is fixed, would it be acceptable to add:=0A= CONFIG_HW_RANDOM=3Dy=0A= CONFIG_CRYPTO_DEV_FSL_CAAM=3Dy=0A= in arm64 defconfig?=0A= =0A= Thanks,=0A= Horia=0A= =0A=