From patchwork Tue Feb 14 21:18:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 653526 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 40F69C05027 for ; Tue, 14 Feb 2023 21:19:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232645AbjBNVTQ (ORCPT ); Tue, 14 Feb 2023 16:19:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232734AbjBNVTJ (ORCPT ); Tue, 14 Feb 2023 16:19:09 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C14922068B; Tue, 14 Feb 2023 13:18:57 -0800 (PST) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31E7kIuj022302; Tue, 14 Feb 2023 21:18:44 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=OcZJ9FjJy7jbdYriOCDiXlSBEC0RxeLblvVoPyOxuDY=; b=N6cOSoYOAj0Ft6Z/+D6wCk5+yaKPeg+3XrNCL1xJ7FnLXoabf8vcFN6rT+aPqZBvYbk4 TFBZc+pGiQtzLcht43PL7lRE6a4daFoXXdaBkrR+vOnrWkPfd1WvtATXD3Jt0qhZ0NBo 5q0KVjrIwgH36fLfsiMueQ6HFwVV6YoldFgsVKKOAnpwPuD2qIIse6F5kATIGRf3S28+ zPCtbNSlt+XLsL6Py/8tv57rxS2tbiWhMp+y6Mb6Scnb8iUQC4ZlbJmVgHl8sKqTInhM DS4AKZ2QOH6O62X2fQVaLUXIVTDbM89QxtLarJBfpodLqDWBC/RCwuFgUrwk30VQ9gWK tw== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3nr661a1cx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 14 Feb 2023 21:18:44 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 31ELIhv1031236 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 14 Feb 2023 21:18:43 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; Tue, 14 Feb 2023 13:18:43 -0800 From: Elliot Berman To: Alex Elder , Srinivas Kandagatla , Catalin Marinas , Will Deacon , Elliot Berman , Prakruthi Deepak Heragu CC: Murali Nalajala , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Dmitry Baryshkov , Bjorn Andersson , "Konrad Dybcio" , Arnd Bergmann , "Greg Kroah-Hartman" , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , Bagas Sanjaya , Jassi Brar , , , , , Subject: [PATCH v10 04/26] virt: gunyah: Add hypercalls to identify Gunyah Date: Tue, 14 Feb 2023 13:18:27 -0800 Message-ID: <20230214211828.3277821-1-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230214211229.3239350-1-quic_eberman@quicinc.com> References: <20230214211229.3239350-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) 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: Bz0d_XdsEOrmOzjbrlT5RzDR9yBkxstn X-Proofpoint-GUID: Bz0d_XdsEOrmOzjbrlT5RzDR9yBkxstn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-14_15,2023-02-14_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 clxscore=1015 adultscore=0 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302140183 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add hypercalls to identify when Linux is running a virtual machine under Gunyah. There are two calls to help identify Gunyah: 1. gh_hypercall_get_uid() returns a UID when running under a Gunyah hypervisor. 2. gh_hypercall_hyp_identify() returns build information and a set of feature flags that are supported by Gunyah. Signed-off-by: Elliot Berman --- arch/arm64/Kbuild | 1 + arch/arm64/gunyah/Makefile | 3 ++ arch/arm64/gunyah/gunyah_hypercall.c | 61 ++++++++++++++++++++++++++++ drivers/virt/Kconfig | 2 + drivers/virt/gunyah/Kconfig | 13 ++++++ include/linux/gunyah.h | 33 +++++++++++++++ 6 files changed, 113 insertions(+) create mode 100644 arch/arm64/gunyah/Makefile create mode 100644 arch/arm64/gunyah/gunyah_hypercall.c create mode 100644 drivers/virt/gunyah/Kconfig diff --git a/arch/arm64/Kbuild b/arch/arm64/Kbuild index 5bfbf7d79c99..e4847ba0e3c9 100644 --- a/arch/arm64/Kbuild +++ b/arch/arm64/Kbuild @@ -3,6 +3,7 @@ obj-y += kernel/ mm/ net/ obj-$(CONFIG_KVM) += kvm/ obj-$(CONFIG_XEN) += xen/ obj-$(subst m,y,$(CONFIG_HYPERV)) += hyperv/ +obj-$(CONFIG_GUNYAH) += gunyah/ obj-$(CONFIG_CRYPTO) += crypto/ # for cleaning diff --git a/arch/arm64/gunyah/Makefile b/arch/arm64/gunyah/Makefile new file mode 100644 index 000000000000..84f1e38cafb1 --- /dev/null +++ b/arch/arm64/gunyah/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_GUNYAH) += gunyah_hypercall.o diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c new file mode 100644 index 000000000000..f30d06ee80cf --- /dev/null +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include + +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) */ +}; + +bool arch_is_gunyah_guest(void) +{ + struct arm_smccc_res res; + u32 uid[4]; + int i; + + arm_smccc_1_1_hvc(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res); + + uid[0] = lower_32_bits(res.a0); + uid[1] = lower_32_bits(res.a1); + uid[2] = lower_32_bits(res.a2); + uid[3] = lower_32_bits(res.a3); + + for (i = 0; i < ARRAY_SIZE(gunyah_known_uuids); i++) + if (!memcmp(uid, gunyah_known_uuids[i], sizeof(uid))) + break; + + return i != ARRAY_SIZE(gunyah_known_uuids); +} +EXPORT_SYMBOL_GPL(arch_is_gunyah_guest); + +#define GH_HYPERCALL(fn) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + fn) + +#define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x8000) + +/** + * gh_hypercall_hyp_identify() - Returns build information and feature flags + * supported by Gunyah. + * @hyp_identity: filled by the hypercall with the API info and feature flags. + */ +void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_HYP_IDENTIFY, &res); + + hyp_identity->api_info = res.a0; + hyp_identity->flags[0] = res.a1; + hyp_identity->flags[1] = res.a2; + hyp_identity->flags[2] = res.a3; +} +EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig index f79ab13a5c28..85bd6626ffc9 100644 --- a/drivers/virt/Kconfig +++ b/drivers/virt/Kconfig @@ -54,4 +54,6 @@ source "drivers/virt/coco/sev-guest/Kconfig" source "drivers/virt/coco/tdx-guest/Kconfig" +source "drivers/virt/gunyah/Kconfig" + endif diff --git a/drivers/virt/gunyah/Kconfig b/drivers/virt/gunyah/Kconfig new file mode 100644 index 000000000000..1a737694c333 --- /dev/null +++ b/drivers/virt/gunyah/Kconfig @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config GUNYAH + tristate "Gunyah Virtualization drivers" + depends on ARM64 + depends on MAILBOX + help + The Gunyah drivers are the helper interfaces that run in a guest VM + such as basic inter-VM IPC and signaling mechanisms, and higher level + services such as memory/device sharing, IRQ sharing, and so on. + + Say Y/M here to enable the drivers needed to interact in a Gunyah + virtual environment. diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 59ef4c735ae8..3fef2854c5e1 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -6,8 +6,10 @@ #ifndef _LINUX_GUNYAH_H #define _LINUX_GUNYAH_H +#include #include #include +#include /******************************************************************************/ /* Common arch-independent definitions for Gunyah hypercalls */ @@ -79,4 +81,35 @@ static inline int gh_remap_error(enum gh_error gh_error) } } +enum gh_api_feature { + GH_API_FEATURE_DOORBELL, + GH_API_FEATURE_MSGQUEUE, + GH_API_FEATURE_VCPU, + GH_API_FEATURE_MEMEXTENT, +}; + +bool arch_is_gunyah_guest(void); + +u16 gh_api_version(void); +bool gh_api_has_feature(enum gh_api_feature feature); + +#define GUNYAH_API_V1 1 + +#define GH_API_INFO_API_VERSION_MASK GENMASK_ULL(13, 0) +#define GH_API_INFO_BIG_ENDIAN BIT_ULL(14) +#define GH_API_INFO_IS_64BIT BIT_ULL(15) +#define GH_API_INFO_VARIANT_MASK GENMASK_ULL(63, 56) + +#define GH_IDENTIFY_DOORBELL BIT_ULL(1) +#define GH_IDENTIFY_MSGQUEUE BIT_ULL(2) +#define GH_IDENTIFY_VCPU BIT_ULL(5) +#define GH_IDENTIFY_MEMEXTENT BIT_ULL(6) + +struct gh_hypercall_hyp_identify_resp { + u64 api_info; + u64 flags[3]; +}; + +void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); + #endif