From patchwork Wed Aug 4 16:18:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12419435 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 904BAC4338F for ; Wed, 4 Aug 2021 16:23:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 746CD60FC4 for ; Wed, 4 Aug 2021 16:23:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237304AbhHDQXg (ORCPT ); Wed, 4 Aug 2021 12:23:36 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3580 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234482AbhHDQXg (ORCPT ); Wed, 4 Aug 2021 12:23:36 -0400 Received: from fraeml744-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4GfxqZ3XzTz6GFV7; Thu, 5 Aug 2021 00:23:06 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml744-chm.china.huawei.com (10.206.15.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 4 Aug 2021 18:23:21 +0200 Received: from localhost.localdomain (10.123.41.22) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 4 Aug 2021 17:23:20 +0100 From: Jonathan Cameron To: , CC: , , Chris Browy , , Lorenzo Pieralisi , Bjorn Helgaas , Jeremy Kerr , Jonathan Cameron Subject: [RFC PATCH 3/4] PCI/CMA: Initial support for Component Measurement and Authentication ECN Date: Thu, 5 Aug 2021 00:18:38 +0800 Message-ID: <20210804161839.3492053-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20210804161839.3492053-1-Jonathan.Cameron@huawei.com> References: <20210804161839.3492053-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-ClientProxiedBy: lhreml754-chm.china.huawei.com (10.201.108.204) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org This currently very much a PoC. Currently the SPDM library only provides a single function to allow a challenge / authentication of the PCI EP. SPDM exchanges must occur in one of a small set of valid squences over which the message digest used in authentication is built up. Placing that complexity in the SPDM library seems like a good way to enforce that logic, without having to do it for each transport. Signed-off-by: Jonathan Cameron Signed-off-by: Jonathan Cameron --- drivers/pci/Kconfig | 9 +++++++++ drivers/pci/Makefile | 1 + drivers/pci/doe.c | 2 -- include/linux/pci-doe.h | 2 ++ 4 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index a30c59cf5e27..43e3b0d5e8cd 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -198,6 +198,15 @@ config PCI_DOE used by a number of different protocols. DOE is defined in the Data Object Exchange ECN to the PCIe r5.0 spec. +config PCI_CMA + tristate + select PCI_DOE + select ASN1_ENCODER + select SPDM + help + This enables library support for the PCI Component Measurement and + Authentication ECN. This uses DMTF SPDM 1.1 + choice prompt "PCI Express hierarchy optimization setting" default PCIE_BUS_DEFAULT diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index 1b61c1a1c232..3f6b3543d565 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_PCI_PF_STUB) += pci-pf-stub.o obj-$(CONFIG_PCI_ECAM) += ecam.o obj-$(CONFIG_PCI_P2PDMA) += p2pdma.o obj-$(CONFIG_PCI_DOE) += doe.o +obj-$(CONFIG_PCI_CMA) += cma.o obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o # Endpoint library must be initialized before its users diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c index 2d20f59e42c6..f6aaeed01010 100644 --- a/drivers/pci/doe.c +++ b/drivers/pci/doe.c @@ -20,8 +20,6 @@ /* Maximum number of DOE instances in the system */ #define PCI_DOE_MAX_CNT 65536 -#define PCI_DOE_PROTOCOL_DISCOVERY 0 - #define PCI_DOE_BUSY_MAX_RETRIES 16 #define PCI_DOE_POLL_INTERVAL (HZ / 128) diff --git a/include/linux/pci-doe.h b/include/linux/pci-doe.h index bdc5f15f14ab..1347c124ed70 100644 --- a/include/linux/pci-doe.h +++ b/include/linux/pci-doe.h @@ -19,6 +19,8 @@ struct pci_doe_prot { u8 type; }; +#define PCI_DOE_PROTOCOL_DISCOVERY 0 +#define PCI_DOE_PROTOCOL_CMA 1 struct workqueue_struct; enum pci_doe_state {