From patchwork Sat Dec 16 00:20:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 754890 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 ED3C515C8; Sat, 16 Dec 2023 00:21:18 +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="XgnrPOn8" 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 3BFNKPMB017090; Sat, 16 Dec 2023 00:21:05 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=dlIQYYiZkB6lUKK/+BFyt+atRuKMzeGXRa/ViJoTpro =; b=XgnrPOn8duX+dLX0rITrDHx5nyIJOqtBgdKK6flEtygjndVvl8mJYkH5DAK k5BTtT7O812gqs2GM51JL2Fnx9sg8c21LUJ02TyTs8CHQ276e8KsFQ04orqtna0o hhac9XsNzrH1OysLGH1C8gyvFI18EuDQ9Fd1JnUaC9Gym4yl6Uoc8mPPmnN2F/xP gkbYO0pQyZOOqeq+16IrdDAenEYM08yp9R9Y6vgQMJFigngfBw3tnEPcAD4mmkJg M2BM1fd+1A2aMPlwoJY5bbBgkPdtJ36Whs8D1C5jSJumn2OdChYbu/ZuzBUmgtRE leddYxO1sPHE98X8QtuNOfj1YRw== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v0hb02g6f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:04 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BG0L317006238 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:03 GMT Received: from [169.254.0.1] (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; Fri, 15 Dec 2023 16:21:02 -0800 From: Elliot Berman Date: Fri, 15 Dec 2023 16:20:46 -0800 Subject: [PATCH RFC v15 05/30] virt: gunyah: Add hypervisor driver Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231215-gunyah-v15-5-192a5d872a30@quicinc.com> References: <20231215-gunyah-v15-0-192a5d872a30@quicinc.com> In-Reply-To: <20231215-gunyah-v15-0-192a5d872a30@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 CC: , , , , , Elliot Berman X-Mailer: b4 0.13-dev 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: d6FbTRpad0tCTBg7ARO1ukrJs2SMoeD7 X-Proofpoint-GUID: d6FbTRpad0tCTBg7ARO1ukrJs2SMoeD7 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 phishscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 spamscore=0 mlxlogscore=999 clxscore=1015 lowpriorityscore=0 bulkscore=0 suspectscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312160000 Add driver to detect when running under Gunyah. It performs basic identification hypercall and populates the platform bus for resource manager to probe. Signed-off-by: Elliot Berman --- drivers/virt/Makefile | 1 + drivers/virt/gunyah/Makefile | 3 +++ drivers/virt/gunyah/gunyah.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 56 insertions(+) diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile index f29901bd7820..ef6a3835d078 100644 --- a/drivers/virt/Makefile +++ b/drivers/virt/Makefile @@ -10,3 +10,4 @@ obj-y += vboxguest/ obj-$(CONFIG_NITRO_ENCLAVES) += nitro_enclaves/ obj-$(CONFIG_ACRN_HSM) += acrn/ obj-y += coco/ +obj-y += gunyah/ diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile new file mode 100644 index 000000000000..34f32110faf9 --- /dev/null +++ b/drivers/virt/gunyah/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +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..20bd6029ffc4 --- /dev/null +++ b/drivers/virt/gunyah/gunyah.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include +#include + +static int gunyah_probe(struct platform_device *pdev) +{ + struct gunyah_hypercall_hyp_identify_resp gunyah_api; + + if (!arch_is_gunyah_guest()) + return -ENODEV; + + gunyah_hypercall_hyp_identify(&gunyah_api); + + pr_info("Running under Gunyah hypervisor %llx/v%u\n", + FIELD_GET(GUNYAH_API_INFO_VARIANT_MASK, gunyah_api.api_info), + gunyah_api_version(&gunyah_api)); + + /* Might move this out to individual drivers if there's ever an API version bump */ + if (gunyah_api_version(&gunyah_api) != GUNYAH_API_V1) { + pr_info("Unsupported Gunyah version: %u\n", + gunyah_api_version(&gunyah_api)); + return -ENODEV; + } + + return devm_of_platform_populate(&pdev->dev); +} + +static const struct of_device_id gunyah_of_match[] = { + { .compatible = "gunyah-hypervisor" }, + {} +}; +MODULE_DEVICE_TABLE(of, gunyah_of_match); + +/* clang-format off */ +static struct platform_driver gunyah_driver = { + .probe = gunyah_probe, + .driver = { + .name = "gunyah", + .of_match_table = gunyah_of_match, + } +}; +/* clang-format on */ +module_platform_driver(gunyah_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Driver");