From patchwork Tue Jan 9 19:37:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 761575 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 304FA3D39A; Tue, 9 Jan 2024 19:38:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="RuWbIk+W" Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 409FLOTm019742; Tue, 9 Jan 2024 19:37:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; s=qcppdkim1; bh=ZmNQftYQ9DObdFwpkA0z8j22sgDG+4nWIrT9hdY4fiQ =; b=RuWbIk+WvWluBTam3/XT8OhTxtqUlJZyo4xUdim7Vtw0mAdya48xt2pG2iM Ke2FC1lmFAtkxTEdGyfmWzKIVEkBM2WyYC2ZiWOkLkE59GivXlpf1q0H9ifrR5F9 ZHt5S7nmDI88Zyc2o8vioCU2/SIeN9Ddfj4hAF3OPhjzbyQwxN8OmG6BlSVsQN7D k8RCeHQc3FkUxOcoypQ13p1mLIWdQ7ut27u9UuwjBzDN0gVyt2cUokTjEL/uMhQD c6jZK24JTZ67IlC8FGbZyp8GT0Hhsu5JyRdds00zHA3jMAfK/B4GGBptY1LPwbdB JWFEideaQU6Aj28HU8exu4xHbkA== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3vh85t0pmn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Jan 2024 19:37:53 +0000 (GMT) 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 409JbqJ0003334 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 9 Jan 2024 19:37:52 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 15.2.1118.40; Tue, 9 Jan 2024 11:37:51 -0800 From: Elliot Berman Date: Tue, 9 Jan 2024 11:37:42 -0800 Subject: [PATCH v16 04/34] virt: gunyah: Add hypercalls to identify Gunyah Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240109-gunyah-v16-4-634904bf4ce9@quicinc.com> References: <20240109-gunyah-v16-0-634904bf4ce9@quicinc.com> In-Reply-To: <20240109-gunyah-v16-0-634904bf4ce9@quicinc.com> To: Alex Elder , Srinivas Kandagatla , Murali Nalajal , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Philip Derrin , Prakruthi Deepak Heragu , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Konrad Dybcio , Bjorn Andersson , Dmitry Baryshkov , "Fuad Tabba" , Sean Christopherson , "Andrew Morton" CC: , , , , , , Elliot Berman X-Mailer: b4 0.13-dev 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: SZJWMs5XkE7kjTL_2qezXSdD6Nq6wlJd X-Proofpoint-GUID: SZJWMs5XkE7kjTL_2qezXSdD6Nq6wlJd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 bulkscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 clxscore=1015 priorityscore=1501 adultscore=0 impostorscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401090158 Add hypercalls to identify when Linux is running in 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. Reviewed-by: Srinivas Kandagatla Reviewed-by: Alex Elder Signed-off-by: Elliot Berman --- arch/arm64/Kbuild | 1 + arch/arm64/gunyah/Makefile | 3 ++ arch/arm64/gunyah/gunyah_hypercall.c | 62 ++++++++++++++++++++++++++++++++++++ drivers/virt/Kconfig | 2 ++ drivers/virt/gunyah/Kconfig | 12 +++++++ include/linux/gunyah.h | 38 ++++++++++++++++++++++ 6 files changed, 118 insertions(+) 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..d44663334f38 --- /dev/null +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include +#include + +/* {c1d58fcd-a453-5fdb-9265-ce36673d5f14} */ +static const uuid_t GUNYAH_UUID = UUID_INIT(0xc1d58fcd, 0xa453, 0x5fdb, 0x92, + 0x65, 0xce, 0x36, 0x67, 0x3d, 0x5f, + 0x14); + +bool arch_is_gunyah_guest(void) +{ + struct arm_smccc_res res; + uuid_t uuid; + u32 *up; + + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res); + + up = (u32 *)&uuid.b[0]; + up[0] = lower_32_bits(res.a0); + up[1] = lower_32_bits(res.a1); + up[2] = lower_32_bits(res.a2); + up[3] = lower_32_bits(res.a3); + + return uuid_equal(&uuid, &GUNYAH_UUID); +} +EXPORT_SYMBOL_GPL(arch_is_gunyah_guest); + +#define GUNYAH_HYPERCALL(fn) \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_VENDOR_HYP, fn) + +/* clang-format off */ +#define GUNYAH_HYPERCALL_HYP_IDENTIFY GUNYAH_HYPERCALL(0x8000) +/* clang-format on */ + +/** + * gunyah_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 gunyah_hypercall_hyp_identify( + struct gunyah_hypercall_hyp_identify_resp *hyp_identity) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_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(gunyah_hypercall_hyp_identify); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig index 40129b6f0eca..172a6a12073c 100644 --- a/drivers/virt/Kconfig +++ b/drivers/virt/Kconfig @@ -50,4 +50,6 @@ source "drivers/virt/acrn/Kconfig" source "drivers/virt/coco/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..6f4c85db80b5 --- /dev/null +++ b/drivers/virt/gunyah/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config GUNYAH + tristate "Gunyah Virtualization drivers" + depends on ARM64 + 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 1eab631a49b6..33bcbd22d39f 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -6,9 +6,11 @@ #ifndef _LINUX_GUNYAH_H #define _LINUX_GUNYAH_H +#include #include #include #include +#include /* Matches resource manager's resource types for VM_GET_HYP_RESOURCES RPC */ enum gunyah_resource_type { @@ -103,4 +105,40 @@ static inline int gunyah_error_remap(enum gunyah_error gunyah_error) } } +enum gunyah_api_feature { + /* clang-format off */ + GUNYAH_FEATURE_DOORBELL = 1, + GUNYAH_FEATURE_MSGQUEUE = 2, + GUNYAH_FEATURE_VCPU = 5, + GUNYAH_FEATURE_MEMEXTENT = 6, + /* clang-format on */ +}; + +bool arch_is_gunyah_guest(void); + +#define GUNYAH_API_V1 1 + +/* Other bits reserved for future use and will be zero */ +/* clang-format off */ +#define GUNYAH_API_INFO_API_VERSION_MASK GENMASK_ULL(13, 0) +#define GUNYAH_API_INFO_BIG_ENDIAN BIT_ULL(14) +#define GUNYAH_API_INFO_IS_64BIT BIT_ULL(15) +#define GUNYAH_API_INFO_VARIANT_MASK GENMASK_ULL(63, 56) +/* clang-format on */ + +struct gunyah_hypercall_hyp_identify_resp { + u64 api_info; + u64 flags[3]; +}; + +static inline u16 +gunyah_api_version(const struct gunyah_hypercall_hyp_identify_resp *gunyah_api) +{ + return FIELD_GET(GUNYAH_API_INFO_API_VERSION_MASK, + gunyah_api->api_info); +} + +void gunyah_hypercall_hyp_identify( + struct gunyah_hypercall_hyp_identify_resp *hyp_identity); + #endif