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Wed, 11 Jan 2023 03:57:26 +0000 (GMT) Received: from [10.61.2.128] (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 06FF0600D2; Wed, 11 Jan 2023 14:57:23 +1100 (AEDT) Message-ID: Subject: Re: [PATCH v2 7/7] powerpc/pseries: Implement secvars for dynamic secure boot From: Andrew Donnellan To: Michael Ellerman , Russell Currey , linuxppc-dev@lists.ozlabs.org Date: Wed, 11 Jan 2023 14:57:22 +1100 In-Reply-To: <87zgawgcpa.fsf@mpe.ellerman.id.au> References: <20221230042014.154483-1-ruscur@russell.cc> <20221230042014.154483-8-ruscur@russell.cc> <87zgawgcpa.fsf@mpe.ellerman.id.au> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.46.2 (3.46.2-1.fc37) MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: my4_Recuo3xIFCqlqFviuBT4xa2dVIcE X-Proofpoint-GUID: my4_Recuo3xIFCqlqFviuBT4xa2dVIcE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-10_10,2023-01-10_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=534 adultscore=0 priorityscore=1501 spamscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 bulkscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301110025 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nayna@linux.ibm.com, gregkh@linuxfoundation.org, gcwilson@linux.ibm.com, linux-kernel@vger.kernel.org, zohar@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, 2023-01-06 at 21:49 +1100, Michael Ellerman wrote: >=20 > > diff --git a/arch/powerpc/platforms/pseries/Kconfig > > b/arch/powerpc/platforms/pseries/Kconfig > > index a3b4d99567cb..94e08c405d50 100644 > > --- a/arch/powerpc/platforms/pseries/Kconfig > > +++ b/arch/powerpc/platforms/pseries/Kconfig > > @@ -162,6 +162,19 @@ config PSERIES_PLPKS > > =C2=A0 > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 If unsure, selec= t N. > > =C2=A0 > > +config PSERIES_PLPKS_SECVAR > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0depends on PSERIES_PLPKS > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0depends on PPC_SECURE_BOOT > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0bool "Support for the PLPKS = secvar interface" > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0help > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 PowerVM can support d= ynamic secure boot with user-defined > > keys > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 through the PLPKS. Ke= ystore objects used in dynamic > > secure boot > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 can be exposed to the= kernel and userspace through the > > powerpc > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 secvar infrastructure= . Select this to enable the PLPKS > > backend > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 for secvars for use i= n pseries dynamic secure boot. > > + > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 If unsure, select N. >=20 > I don't think we need that config option at all, or if we do it > should > not be user selectable and just enabled automatically by > PSERIES_PLPKS. I actually think we should get rid of both PSERIES_PLPKS_SECVAR and PSERIES_PLPKS, and just use PPC_SECURE_BOOT / PPC_SECVAR_SYSFS. --=20 Andrew Donnellan OzLabs, ADL Canberra ajd@linux.ibm.com IBM Australia Limited