From patchwork Mon Apr 24 23:15:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 677301 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 72A72C77B76 for ; Mon, 24 Apr 2023 23:17:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233201AbjDXXRI (ORCPT ); Mon, 24 Apr 2023 19:17:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232791AbjDXXRB (ORCPT ); Mon, 24 Apr 2023 19:17:01 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 512269EC8; Mon, 24 Apr 2023 16:16:52 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33ONFBEQ027470; Mon, 24 Apr 2023 23:16:40 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=QrKSZDdyDh51gvAw4S3EbUQQFJhK9irr7JiS/5rxqhk=; b=bUxDj9QJYuO4EdkGWlFIVvSnURbaqvaKmopZ6+W4G2Gpc8oBU5y+lDh6kmvZPbnyAM35 KcLI4iUREjWNw2qHSh+8rd1hT6jv9cNFvzbZbDTxqDB1o5L1zsntNRCpO1X6L1SX+8WQ 7/Xpx1auLkY2LjzCdWiOhsVKSux2IYkFDU0FCUVB5a57YGEhY0BpiSeNQBpusSDdggUH rL7f70UQoBwp8VVAR6CVOmnqL6aIMhue1PrpqN9D6xGYeHVCE9eTs1uTTDahZ6W4kDaf a3rRhhSQ+8upmVE4hKy3KCSJ3cvkeCva2mqlGl/VHgyBg2wq7+slfb6Lcu+MXNFydH3S 5A== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3q61jdr5kk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Apr 2023 23:16:39 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 33ONGdGF006968 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Apr 2023 23:16:39 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 15.2.986.42; Mon, 24 Apr 2023 16:16:38 -0700 From: Elliot Berman To: Alex Elder , Srinivas Kandagatla , 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 , Will Deacon , Andy Gross , Catalin Marinas , Jassi Brar , , , , , Subject: [PATCH v12 08/25] gunyah: rsc_mgr: Add VM lifecycle RPC Date: Mon, 24 Apr 2023 16:15:41 -0700 Message-ID: <20230424231558.70911-9-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230424231558.70911-1-quic_eberman@quicinc.com> References: <20230424231558.70911-1-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: VwbMYNS5VEyXzISQFOb9WI4_zeWOXpuh X-Proofpoint-GUID: VwbMYNS5VEyXzISQFOb9WI4_zeWOXpuh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-24_11,2023-04-21_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 clxscore=1015 mlxlogscore=999 malwarescore=0 phishscore=0 adultscore=0 mlxscore=0 suspectscore=0 impostorscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304240211 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add Gunyah Resource Manager RPC to launch an unauthenticated VM. Signed-off-by: Elliot Berman --- drivers/virt/gunyah/Makefile | 2 +- drivers/virt/gunyah/rsc_mgr_rpc.c | 259 ++++++++++++++++++++++++++++++ include/linux/gunyah_rsc_mgr.h | 73 +++++++++ 3 files changed, 333 insertions(+), 1 deletion(-) create mode 100644 drivers/virt/gunyah/rsc_mgr_rpc.c diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile index 0f5aec834698..241bab357b86 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 -gunyah-y += rsc_mgr.o +gunyah-y += rsc_mgr.o rsc_mgr_rpc.o obj-$(CONFIG_GUNYAH) += gunyah.o diff --git a/drivers/virt/gunyah/rsc_mgr_rpc.c b/drivers/virt/gunyah/rsc_mgr_rpc.c new file mode 100644 index 000000000000..97a6abe3e144 --- /dev/null +++ b/drivers/virt/gunyah/rsc_mgr_rpc.c @@ -0,0 +1,259 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include "rsc_mgr.h" + +/* Message IDs: VM Management */ +#define GH_RM_RPC_VM_ALLOC_VMID 0x56000001 +#define GH_RM_RPC_VM_DEALLOC_VMID 0x56000002 +#define GH_RM_RPC_VM_START 0x56000004 +#define GH_RM_RPC_VM_STOP 0x56000005 +#define GH_RM_RPC_VM_RESET 0x56000006 +#define GH_RM_RPC_VM_CONFIG_IMAGE 0x56000009 +#define GH_RM_RPC_VM_INIT 0x5600000B +#define GH_RM_RPC_VM_GET_HYP_RESOURCES 0x56000020 +#define GH_RM_RPC_VM_GET_VMID 0x56000024 + +struct gh_rm_vm_common_vmid_req { + __le16 vmid; + __le16 _padding; +} __packed; + +/* Call: VM_ALLOC */ +struct gh_rm_vm_alloc_vmid_resp { + __le16 vmid; + __le16 _padding; +} __packed; + +/* Call: VM_STOP */ +#define GH_RM_VM_STOP_FLAG_FORCE_STOP BIT(0) + +#define GH_RM_VM_STOP_REASON_FORCE_STOP 3 + +struct gh_rm_vm_stop_req { + __le16 vmid; + u8 flags; + u8 _padding; + __le32 stop_reason; +} __packed; + +/* Call: VM_CONFIG_IMAGE */ +struct gh_rm_vm_config_image_req { + __le16 vmid; + __le16 auth_mech; + __le32 mem_handle; + __le64 image_offset; + __le64 image_size; + __le64 dtb_offset; + __le64 dtb_size; +} __packed; + +/* + * Several RM calls take only a VMID as a parameter and give only standard + * response back. Deduplicate boilerplate code by using this common call. + */ +static int gh_rm_common_vmid_call(struct gh_rm *rm, u32 message_id, u16 vmid) +{ + struct gh_rm_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + + return gh_rm_call(rm, message_id, &req_payload, sizeof(req_payload), NULL, NULL); +} + +/** + * gh_rm_alloc_vmid() - Allocate a new VM in Gunyah. Returns the VM identifier. + * @rm: Handle to a Gunyah resource manager + * @vmid: Use 0 to dynamically allocate a VM. A reserved VMID can be supplied + * to request allocation of a platform-defined VM. + * + * Returns - the allocated VMID or negative value on error + */ +int gh_rm_alloc_vmid(struct gh_rm *rm, u16 vmid) +{ + struct gh_rm_vm_common_vmid_req req_payload = { + .vmid = vmid, + }; + struct gh_rm_vm_alloc_vmid_resp *resp_payload; + size_t resp_size; + void *resp; + int ret; + + ret = gh_rm_call(rm, GH_RM_RPC_VM_ALLOC_VMID, &req_payload, sizeof(req_payload), &resp, + &resp_size); + if (ret) + return ret; + + if (!vmid) { + resp_payload = resp; + ret = le16_to_cpu(resp_payload->vmid); + kfree(resp); + } + + return ret; +} + +/** + * gh_rm_dealloc_vmid() - Dispose of a VMID + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gh_rm_alloc_vmid + */ +int gh_rm_dealloc_vmid(struct gh_rm *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_DEALLOC_VMID, vmid); +} + +/** + * gh_rm_vm_reset() - Reset a VM's resources + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gh_rm_alloc_vmid + * + * As part of tearing down the VM, request RM to clean up all the VM resources + * associated with the VM. Only after this, Linux can clean up all the + * references it maintains to resources. + */ +int gh_rm_vm_reset(struct gh_rm *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_RESET, vmid); +} + +/** + * gh_rm_vm_start() - Move a VM into "ready to run" state + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gh_rm_alloc_vmid + * + * On VMs which use proxy scheduling, vcpu_run is needed to actually run the VM. + * On VMs which use Gunyah's scheduling, the vCPUs start executing in accordance with Gunyah + * scheduling policies. + */ +int gh_rm_vm_start(struct gh_rm *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_START, vmid); +} + +/** + * gh_rm_vm_stop() - Send a request to Resource Manager VM to forcibly stop a VM. + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gh_rm_alloc_vmid + */ +int gh_rm_vm_stop(struct gh_rm *rm, u16 vmid) +{ + struct gh_rm_vm_stop_req req_payload = { + .vmid = cpu_to_le16(vmid), + .flags = GH_RM_VM_STOP_FLAG_FORCE_STOP, + .stop_reason = cpu_to_le32(GH_RM_VM_STOP_REASON_FORCE_STOP), + }; + + return gh_rm_call(rm, GH_RM_RPC_VM_STOP, &req_payload, sizeof(req_payload), NULL, NULL); +} + +/** + * gh_rm_vm_configure() - Prepare a VM to start and provide the common + * configuration needed by RM to configure a VM + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gh_rm_alloc_vmid + * @auth_mechanism: Authentication mechanism used by resource manager to verify + * the virtual machine + * @mem_handle: Handle to a previously shared memparcel that contains all parts + * of the VM image subject to authentication. + * @image_offset: Start address of VM image, relative to the start of memparcel + * @image_size: Size of the VM image + * @dtb_offset: Start address of the devicetree binary with VM configuration, + * relative to start of memparcel. + * @dtb_size: Maximum size of devicetree binary. + */ +int gh_rm_vm_configure(struct gh_rm *rm, u16 vmid, enum gh_rm_vm_auth_mechanism auth_mechanism, + u32 mem_handle, u64 image_offset, u64 image_size, u64 dtb_offset, u64 dtb_size) +{ + struct gh_rm_vm_config_image_req req_payload = { + .vmid = cpu_to_le16(vmid), + .auth_mech = cpu_to_le16(auth_mechanism), + .mem_handle = cpu_to_le32(mem_handle), + .image_offset = cpu_to_le64(image_offset), + .image_size = cpu_to_le64(image_size), + .dtb_offset = cpu_to_le64(dtb_offset), + .dtb_size = cpu_to_le64(dtb_size), + }; + + return gh_rm_call(rm, GH_RM_RPC_VM_CONFIG_IMAGE, &req_payload, sizeof(req_payload), + NULL, NULL); +} + +/** + * gh_rm_vm_init() - Move the VM to initialized state. + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier + * + * RM will allocate needed resources for the VM. + */ +int gh_rm_vm_init(struct gh_rm *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_INIT, vmid); +} + +/** + * gh_rm_get_hyp_resources() - Retrieve hypervisor resources (capabilities) associated with a VM + * @rm: Handle to a Gunyah resource manager + * @vmid: VMID of the other VM to get the resources of + * @resources: Set by gh_rm_get_hyp_resources and contains the returned hypervisor resources. + * Caller must free the resources pointer if successful. + */ +int gh_rm_get_hyp_resources(struct gh_rm *rm, u16 vmid, + struct gh_rm_hyp_resources **resources) +{ + struct gh_rm_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + struct gh_rm_hyp_resources *resp; + size_t resp_size; + int ret; + + ret = gh_rm_call(rm, GH_RM_RPC_VM_GET_HYP_RESOURCES, + &req_payload, sizeof(req_payload), + (void **)&resp, &resp_size); + if (ret) + return ret; + + if (!resp_size) + return -EBADMSG; + + if (resp_size < struct_size(resp, entries, 0) || + resp_size != struct_size(resp, entries, le32_to_cpu(resp->n_entries))) { + kfree(resp); + return -EBADMSG; + } + + *resources = resp; + return 0; +} + +/** + * gh_rm_get_vmid() - Retrieve VMID of this virtual machine + * @rm: Handle to a Gunyah resource manager + * @vmid: Filled with the VMID of this VM + */ +int gh_rm_get_vmid(struct gh_rm *rm, u16 *vmid) +{ + static u16 cached_vmid = GH_VMID_INVAL; + size_t resp_size; + __le32 *resp; + int ret; + + if (cached_vmid != GH_VMID_INVAL) { + *vmid = cached_vmid; + return 0; + } + + ret = gh_rm_call(rm, GH_RM_RPC_VM_GET_VMID, NULL, 0, (void **)&resp, &resp_size); + if (ret) + return ret; + + *vmid = cached_vmid = lower_16_bits(le32_to_cpu(*resp)); + kfree(resp); + + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_get_vmid); diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index f2a312e80af5..1ac66d9004d2 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -18,4 +18,77 @@ int gh_rm_notifier_unregister(struct gh_rm *rm, struct notifier_block *nb); struct device *gh_rm_get(struct gh_rm *rm); void gh_rm_put(struct gh_rm *rm); +struct gh_rm_vm_exited_payload { + __le16 vmid; + __le16 exit_type; + __le32 exit_reason_size; + u8 exit_reason[]; +} __packed; + +#define GH_RM_NOTIFICATION_VM_EXITED 0x56100001 + +enum gh_rm_vm_status { + GH_RM_VM_STATUS_NO_STATE = 0, + GH_RM_VM_STATUS_INIT = 1, + GH_RM_VM_STATUS_READY = 2, + GH_RM_VM_STATUS_RUNNING = 3, + GH_RM_VM_STATUS_PAUSED = 4, + GH_RM_VM_STATUS_LOAD = 5, + GH_RM_VM_STATUS_AUTH = 6, + GH_RM_VM_STATUS_INIT_FAILED = 8, + GH_RM_VM_STATUS_EXITED = 9, + GH_RM_VM_STATUS_RESETTING = 10, + GH_RM_VM_STATUS_RESET = 11, +}; + +struct gh_rm_vm_status_payload { + __le16 vmid; + u16 reserved; + u8 vm_status; + u8 os_status; + __le16 app_status; +} __packed; + +#define GH_RM_NOTIFICATION_VM_STATUS 0x56100008 + +/* RPC Calls */ +int gh_rm_alloc_vmid(struct gh_rm *rm, u16 vmid); +int gh_rm_dealloc_vmid(struct gh_rm *rm, u16 vmid); +int gh_rm_vm_reset(struct gh_rm *rm, u16 vmid); +int gh_rm_vm_start(struct gh_rm *rm, u16 vmid); +int gh_rm_vm_stop(struct gh_rm *rm, u16 vmid); + +enum gh_rm_vm_auth_mechanism { + GH_RM_VM_AUTH_NONE = 0, + GH_RM_VM_AUTH_QCOM_PIL_ELF = 1, + GH_RM_VM_AUTH_QCOM_ANDROID_PVM = 2, +}; + +int gh_rm_vm_configure(struct gh_rm *rm, u16 vmid, enum gh_rm_vm_auth_mechanism auth_mechanism, + u32 mem_handle, u64 image_offset, u64 image_size, + u64 dtb_offset, u64 dtb_size); +int gh_rm_vm_init(struct gh_rm *rm, u16 vmid); + +struct gh_rm_hyp_resource { + u8 type; + u8 reserved; + __le16 partner_vmid; + __le32 resource_handle; + __le32 resource_label; + __le64 cap_id; + __le32 virq_handle; + __le32 virq; + __le64 base; + __le64 size; +} __packed; + +struct gh_rm_hyp_resources { + __le32 n_entries; + struct gh_rm_hyp_resource entries[]; +} __packed; + +int gh_rm_get_hyp_resources(struct gh_rm *rm, u16 vmid, + struct gh_rm_hyp_resources **resources); +int gh_rm_get_vmid(struct gh_rm *rm, u16 *vmid); + #endif