From patchwork Mon Nov 21 13:59:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 627283 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 3B000C433FE for ; Mon, 21 Nov 2022 14:03:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231478AbiKUODp (ORCPT ); Mon, 21 Nov 2022 09:03:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230198AbiKUOCN (ORCPT ); Mon, 21 Nov 2022 09:02:13 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EFDC81C929; Mon, 21 Nov 2022 06:02:11 -0800 (PST) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2ALCqsGw013197; Mon, 21 Nov 2022 14:01:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=HF4iBQ+cZRuNQfUCG3QLF2FXAPRplCw3XpMEge6HY8k=; b=UdVUMe9dTK7PS7ucA3sbBLlpQmxWyYTpj5rJZ/9B8A0SGS7dUH6UYxl7h3WMD/ZdqnJP /JmIzZ45aPZl+heAUTYjIdcfboSrdKomZJ8Y2+8Qm+kxBpfzXDCieBJmZEhxo7S+NwGE lWPmeeTHlG5SKQYSLmJsj5JKri8ktFYxVCt7eediSSWHg7tLjwmE5xrFGt3deaOZro86 ZYIWJf2WltmsB6LAr4UiiwGdxAXt6qyZxMyRM0z5iSIKpcNSOlJO2zXGlgAUaHLbOV5Y DvqQ4TpkydFkYSFMVXabL0WMCviE9mWvnDzDyKCh/BXHE/Ixnk7hOgGlvM3xIeRoJV7+ /w== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3kxrbc4n6x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 21 Nov 2022 14:01:44 +0000 Received: from nasanex01b.na.qualcomm.com (corens_vlan604_snip.qualcomm.com [10.53.140.1]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 2ALE1hcL024269 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 21 Nov 2022 14:01:43 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 21 Nov 2022 06:01:41 -0800 From: Elliot Berman To: Bjorn Andersson , Elliot Berman , Murali Nalajala CC: Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Prakruthi Deepak Heragu , Arnd Bergmann , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , Catalin Marinas , Will Deacon , Jassi Brar , Sudeep Holla , Mark Rutland , Lorenzo Pieralisi , , , , , , Subject: [PATCH v7 06/20] virt: gunyah: Identify hypervisor version Date: Mon, 21 Nov 2022 05:59:55 -0800 Message-ID: <20221121140009.2353512-7-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221121140009.2353512-1-quic_eberman@quicinc.com> References: <20221121140009.2353512-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: LOG0Aj_TUCRD5F2KpVHlPdlGGWX-WR7a X-Proofpoint-GUID: LOG0Aj_TUCRD5F2KpVHlPdlGGWX-WR7a X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-21_13,2022-11-18_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 spamscore=0 bulkscore=0 adultscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 mlxscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211210109 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Export the version of Gunyah which is reported via the hyp_identify hypercall. Increments of the major API version indicate possibly backwards incompatible changes. Export the hypervisor identity so that Gunyah drivers can act according to the major API version. Signed-off-by: Elliot Berman --- drivers/virt/Makefile | 1 + drivers/virt/gunyah/Makefile | 1 + drivers/virt/gunyah/gunyah.c | 46 ++++++++++++++++++++++++++++++++++++ include/linux/gunyah.h | 6 +++++ 4 files changed, 54 insertions(+) create mode 100644 drivers/virt/gunyah/Makefile create mode 100644 drivers/virt/gunyah/gunyah.c diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile index 093674e05c40..92b7e5311548 100644 --- a/drivers/virt/Makefile +++ b/drivers/virt/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_NITRO_ENCLAVES) += nitro_enclaves/ obj-$(CONFIG_ACRN_HSM) += acrn/ obj-$(CONFIG_EFI_SECRET) += coco/efi_secret/ obj-$(CONFIG_SEV_GUEST) += coco/sev-guest/ +obj-y += gunyah/ diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile new file mode 100644 index 000000000000..2ac4ee64b89d --- /dev/null +++ b/drivers/virt/gunyah/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_GUNYAH) += gunyah.o diff --git a/drivers/virt/gunyah/gunyah.c b/drivers/virt/gunyah/gunyah.c new file mode 100644 index 000000000000..c34c9046fc08 --- /dev/null +++ b/drivers/virt/gunyah/gunyah.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#define pr_fmt(fmt) "gunyah: " fmt + +#include +#include +#include +#include + +struct gh_hypercall_hyp_identify_resp gunyah_api; +EXPORT_SYMBOL_GPL(gunyah_api); + +static const uint32_t gunyah_known_uuids[][4] = { + {0x19bd54bd, 0x0b37571b, 0x946f609b, 0x54539de6}, /* QC_HYP (Qualcomm's build) */ + {0x673d5f14, 0x9265ce36, 0xa4535fdb, 0xc1d58fcd}, /* GUNYAH (open source build) */ +}; + +static int __init gunyah_init(void) +{ + u32 uid[4]; + int i; + + gh_hypercall_get_uid(uid); + + for (i = 0; i < ARRAY_SIZE(gunyah_known_uuids); i++) + if (!memcmp(uid, gunyah_known_uuids[i], sizeof(uid))) + break; + + if (i == ARRAY_SIZE(gunyah_known_uuids)) + return -ENODEV; + + gh_hypercall_hyp_identify(&gunyah_api); + + pr_info("Running under Gunyah hypervisor %llx/v%u\n", + FIELD_GET(GH_API_INFO_VARIANT_MASK, gunyah_api.api_info), + gh_api_version()); + + return 0; +} +arch_initcall(gunyah_init); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Hypervisor Driver"); diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 2765d2b40198..166156f69df9 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -92,6 +92,12 @@ struct gh_hypercall_hyp_identify_resp { u64 api_info; u64 flags[3]; }; +extern struct gh_hypercall_hyp_identify_resp gunyah_api; + +static inline u16 gh_api_version(void) +{ + return FIELD_GET(GH_API_INFO_API_VERSION_MASK, gunyah_api.api_info); +} void gh_hypercall_get_uid(u32 uid[4]); void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity);