From patchwork Mon Aug 8 15:43:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Joyce X-Patchwork-Id: 12938870 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75918C25B0D for ; Mon, 8 Aug 2022 15:44:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243053AbiHHPoJ (ORCPT ); Mon, 8 Aug 2022 11:44:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235852AbiHHPoH (ORCPT ); Mon, 8 Aug 2022 11:44:07 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC82010C2; Mon, 8 Aug 2022 08:44:06 -0700 (PDT) Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 278Fd9jb024060; Mon, 8 Aug 2022 15:43:54 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=4vO33KM9Kg2lQ/XR0IrQu6Dhh3R1NiWTNIKnWvbRKBI=; b=UjhwfRU/yF90T78/3JfBWsCb8coJwr377p9XHOab6jfKXgE69+he3krBAiV8iOlNUbPX 7vXvue+Ykq+C6SLZHKJgvNK/Dut0bwaPJwWEH0U84PmV5N0FM2CGkH6mG+jmpMZ4c+5R rxaH6OKpwNIP2GrjRt7fDmHl6Sa2QSshsAgT4vvQGgp7n5ev/wfipDAL6/ldBX218c1/ tsGagKhC3qGpn0bPqgNI8A/FFAHdUUIkZMhWwVYcQ3+TW+G2PkyzeqeZ2When+3YkRor /WUiQnC1RDFvVWAnFSPeoKBBzW7RJfPjeltPYRtm5mQCYdYuS8a5R8TFs+yjQnuHDqfc dA== Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3hu48fawet-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Aug 2022 15:43:53 +0000 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 278FZpVS014626; Mon, 8 Aug 2022 15:43:53 GMT Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by ppma04dal.us.ibm.com with ESMTP id 3hsfx98rgn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Aug 2022 15:43:52 +0000 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 278FhpQU33423822 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 8 Aug 2022 15:43:52 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E16C27805E; Mon, 8 Aug 2022 15:43:51 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 857A778067; Mon, 8 Aug 2022 15:43:50 +0000 (GMT) Received: from rhel-laptop.ibm.com.com (unknown [9.160.34.213]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 8 Aug 2022 15:43:50 +0000 (GMT) From: gjoyce@linux.vnet.ibm.com To: linux-block@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, jonathan.derrick@linux.dev, brking@linux.vnet.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au, nayna@linux.ibm.com, axboe@kernel.dk, akpm@linux-foundation.org, gjoyce@linux.vnet.ibm.com, linux-efi@vger.kernel.org, keyrings@vger.kernel.org Subject: [PATCH v3a 2/2] powerpc/pseries: Override lib/arch_vars.c functions Date: Mon, 8 Aug 2022 10:43:45 -0500 Message-Id: <20220808154345.11240-3-gjoyce@linux.vnet.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220808154345.11240-1-gjoyce@linux.vnet.ibm.com> References: <20220808154345.11240-1-gjoyce@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: x3Mw2vB0hgJ4LR6g2Ez-ea2ha6KH1oWB X-Proofpoint-ORIG-GUID: x3Mw2vB0hgJ4LR6g2Ez-ea2ha6KH1oWB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-08_10,2022-08-08_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=0 adultscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 phishscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2208080075 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Greg Joyce Self Encrypting Drives(SED) make use of POWER LPAR Platform KeyStore for storing its variables. Thus the block subsystem needs to access PowerPC specific functions to read/write objects in PLPKS. Override the default implementations in lib/arch_vars.c file with PowerPC specific versions. Signed-off-by: Greg Joyce --- arch/powerpc/platforms/pseries/Makefile | 1 + .../platforms/pseries/plpks_arch_ops.c | 167 ++++++++++++++++++ 2 files changed, 168 insertions(+) create mode 100644 arch/powerpc/platforms/pseries/plpks_arch_ops.c diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 14e143b946a3..3a545422eae5 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_PPC_SPLPAR) += vphn.o obj-$(CONFIG_PPC_SVM) += svm.o obj-$(CONFIG_FA_DUMP) += rtas-fadump.o obj-$(CONFIG_PSERIES_PLPKS) += plpks.o +obj-$(CONFIG_PSERIES_PLPKS) += plpks_arch_ops.o obj-$(CONFIG_SUSPEND) += suspend.o obj-$(CONFIG_PPC_VAS) += vas.o vas-sysfs.o diff --git a/arch/powerpc/platforms/pseries/plpks_arch_ops.c b/arch/powerpc/platforms/pseries/plpks_arch_ops.c new file mode 100644 index 000000000000..fdea3322f696 --- /dev/null +++ b/arch/powerpc/platforms/pseries/plpks_arch_ops.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Platform arch specific code for SED + * Copyright (C) 2022 IBM Corporation + * + * Define operations for generic kernel subsystems to read/write keys + * from POWER LPAR Platform KeyStore(PLPKS). + * + * List of subsystems/usecase using PLPKS: + * - Self Encrypting Drives(SED) + */ + +#include +#include +#include +#include +#include +#include +#include +#include "plpks.h" + +/* + * variable structure that contains all SED data + */ +struct plpks_sed_object_data { + u_char version; + u_char pad1[7]; + u_long authority; + u_long range; + u_int key_len; + u_char key[32]; +}; + +/* + * ext_type values + * 00 no extension exists + * 01-1F common + * 20-3F AIX + * 40-5F Linux + * 60-7F IBMi + */ + +/* + * This extension is optional for version 1 sed_object_data + */ +struct sed_object_extension { + u8 ext_type; + u8 rsvd[3]; + u8 ext_data[64]; +}; + +#define PKS_SED_OBJECT_DATA_V1 1 +#define PKS_SED_MANGLED_LABEL "/default/pri" +#define PLPKS_SED_COMPONENT "sed-opal" + +#define PLPKS_ARCHVAR_POLICY WORLDREADABLE +#define PLPKS_ARCHVAR_OS_COMMON 4 + +/* + * Read the variable data from PKS given the label + */ +int arch_read_variable(enum arch_variable_type type, char *varname, + void *varbuf, u_int *varlen) +{ + struct plpks_var var; + struct plpks_sed_object_data *data; + u_int offset = 0; + char *buf = (char *)varbuf; + int ret; + + var.name = varname; + var.namelen = strlen(varname); + var.policy = PLPKS_ARCHVAR_POLICY; + var.os = PLPKS_ARCHVAR_OS_COMMON; + var.data = NULL; + var.datalen = 0; + + switch (type) { + case ARCH_VAR_OPAL_KEY: + var.component = PLPKS_SED_COMPONENT; +#ifdef OPAL_AUTH_KEY + if (strcmp(OPAL_AUTH_KEY, varname) == 0) { + var.name = PKS_SED_MANGLED_LABEL; + var.namelen = strlen(varname); + } +#endif + offset = offsetof(struct plpks_sed_object_data, key); + break; + case ARCH_VAR_OTHER: + var.component = ""; + break; + } + + ret = plpks_read_os_var(&var); + if (ret != 0) + return ret; + + if (offset > var.datalen) + offset = 0; + + switch (type) { + case ARCH_VAR_OPAL_KEY: + data = (struct plpks_sed_object_data *)var.data; + *varlen = data->key_len; + break; + case ARCH_VAR_OTHER: + *varlen = var.datalen; + break; + } + + if (var.data) { + memcpy(varbuf, var.data + offset, var.datalen - offset); + buf[*varlen] = '\0'; + kfree(var.data); + } + + return 0; +} + +/* + * Write the variable data to PKS given the label + */ +int arch_write_variable(enum arch_variable_type type, char *varname, + void *varbuf, u_int varlen) +{ + struct plpks_var var; + struct plpks_sed_object_data data; + struct plpks_var_name vname; + + var.name = varname; + var.namelen = strlen(varname); + var.policy = PLPKS_ARCHVAR_POLICY; + var.os = PLPKS_ARCHVAR_OS_COMMON; + var.datalen = varlen; + var.data = varbuf; + + switch (type) { + case ARCH_VAR_OPAL_KEY: + var.component = PLPKS_SED_COMPONENT; +#ifdef OPAL_AUTH_KEY + if (strcmp(OPAL_AUTH_KEY, varname) == 0) { + var.name = PKS_SED_MANGLED_LABEL; + var.namelen = strlen(varname); + } +#endif + var.datalen = sizeof(struct plpks_sed_object_data); + var.data = (u8 *)&data; + + /* initialize SED object */ + data.version = PKS_SED_OBJECT_DATA_V1; + data.authority = 0; + data.range = 0; + data.key_len = varlen; + memcpy(data.key, varbuf, varlen); + break; + case ARCH_VAR_OTHER: + var.component = ""; + break; + } + + /* variable update requires delete first */ + vname.namelen = var.namelen; + vname.name = var.name; + (void)plpks_remove_var(var.component, var.os, vname); + + return plpks_write_var(var); +}