From patchwork Wed Oct 26 18:58:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 618860 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 83EC7C433FE for ; Wed, 26 Oct 2022 19:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234475AbiJZTBM (ORCPT ); Wed, 26 Oct 2022 15:01:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234556AbiJZTAw (ORCPT ); Wed, 26 Oct 2022 15:00:52 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E703A13F89; Wed, 26 Oct 2022 11:59:53 -0700 (PDT) Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29QIps1N001934; Wed, 26 Oct 2022 18:59:38 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=6YwSUwMcVDMg5THw4DKg7KN4EZmOMtJ4XVI/qBW5/FY=; b=LAh2jUe+PRFY59CVW3XDLx3gD9OcT+wZESlNjZ7x4Vh8C1Yd+jeYH7aWOoNjHd9lzNpr fDBYD8unLNaR1hAHEuNw8H166r86xiRuIIb5dYpsPEyOcpxZzA2qMkDlv/pmgLkO/E+9 Xtscyee9XgBxFo3NFxS5Oj0D9zOhkx64PQfZ652MKWj8bkCik/Te123MNZ1O/TWgbff6 z7c0H/ih3opFInv7q0god8Zh5MO+YuPEfeb306a5Xvj3RwdbO7AzclUw+YDp/SOuUeTi OPl7vzk7q8e/dSiuQ4qQj7yi4uhrR9SoN8eLgQBz2g7BaTke00SRcxHLYSYVM+uvbu+V oQ== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3kfahu80r5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Oct 2022 18:59:38 +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 29QIxbOn010691 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Oct 2022 18:59:37 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 15.2.986.29; Wed, 26 Oct 2022 11:59:36 -0700 From: Elliot Berman To: Bjorn Andersson CC: Elliot Berman , Murali Nalajala , Trilok Soni , "Srivatsa Vaddagiri" , Carl van Schaik , Prakruthi Deepak Heragu , Andy Gross , Dmitry Baryshkov , Jassi Brar , , Mark Rutland , Lorenzo Pieralisi , Sudeep Holla , Marc Zyngier , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , "Will Deacon" , Catalin Marinas , "Arnd Bergmann" , Greg Kroah-Hartman , Srinivas Kandagatla , Amol Maheshwari , Kalle Valo , , , , Subject: [PATCH v6 16/21] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot Date: Wed, 26 Oct 2022 11:58:41 -0700 Message-ID: <20221026185846.3983888-17-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026185846.3983888-1-quic_eberman@quicinc.com> References: <20221026185846.3983888-1-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-GUID: stP8UsQ1cDlSfEITL95jvwkivOkcSyQV X-Proofpoint-ORIG-GUID: stP8UsQ1cDlSfEITL95jvwkivOkcSyQV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-26_07,2022-10-26_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 suspectscore=0 malwarescore=0 bulkscore=0 mlxscore=0 mlxlogscore=999 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2210260105 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add remaining ioctls to support non-proxy VM boot: - Gunyah Resource Manager uses the VM's devicetree to configure the virtual machine. The location of the devicetree in the guest's virtual memory can be declared via the SET_DTB_CONFIG ioctl. - Trigger start of the virtual machine with VM_START ioctl. Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman --- arch/arm64/include/uapi/asm/gunyah.h | 17 ++++++ drivers/virt/gunyah/vm_mgr.c | 91 ++++++++++++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 9 +++ drivers/virt/gunyah/vm_mgr_mm.c | 29 +++++++-- include/uapi/linux/gunyah.h | 8 +++ 5 files changed, 149 insertions(+), 5 deletions(-) create mode 100644 arch/arm64/include/uapi/asm/gunyah.h diff --git a/arch/arm64/include/uapi/asm/gunyah.h b/arch/arm64/include/uapi/asm/gunyah.h new file mode 100644 index 000000000000..54986f075ef5 --- /dev/null +++ b/arch/arm64/include/uapi/asm/gunyah.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _UAPI_ASM_GUNYAH +#define _UAPI_ASM_GUNYAH + +#define GH_REG_GENERAL 0x10000 +#define GH_REG_X_MASK 0x1f +#define GH_REG_SPECIAL 0x20000 + +#define GH_REG_X(n) (GH_REG_GENERAL | (n & GH_REG_X_MASK)) +#define GH_REG_PC (GH_REG_SPECIAL) +#define GH_REG_SP_EL1 (GH_REG_SPECIAL + 1) + +#endif diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c index a993e81a20e2..3dae2fd9e412 100644 --- a/drivers/virt/gunyah/vm_mgr.c +++ b/drivers/virt/gunyah/vm_mgr.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include @@ -32,10 +33,79 @@ static __must_check struct gunyah_vm *gunyah_vm_alloc(void) mutex_init(&ghvm->mm_lock); INIT_LIST_HEAD(&ghvm->memory_mappings); + init_rwsem(&ghvm->status_lock); return ghvm; } +static int gh_vm_start(struct gunyah_vm *ghvm) +{ + struct gunyah_vm_memory_mapping *mapping; + u64 dtb_offset; + u32 mem_handle; + int ret; + + down_write(&ghvm->status_lock); + if (ghvm->vm_status != GH_RM_VM_STATUS_NO_STATE) { + up_write(&ghvm->status_lock); + return 0; + } + + mapping = gh_vm_mem_mapping_find_mapping(ghvm, + ghvm->dtb_config.gpa, ghvm->dtb_config.size); + if (!mapping) { + pr_warn("Failed to find the memory_handle for DTB\n"); + ret = -EINVAL; + goto err; + } + + mem_handle = mapping->parcel.mem_handle; + dtb_offset = ghvm->dtb_config.gpa - mapping->guest_phys_addr; + + ret = gh_rm_vm_configure(ghvm->vmid, ghvm->auth, mem_handle, + 0, 0, dtb_offset, ghvm->dtb_config.size); + if (ret) { + pr_warn("Failed to configure VM: %d\n", ret); + goto err; + } + + ret = gh_rm_vm_init(ghvm->vmid); + if (ret) { + pr_warn("Failed to initialize VM: %d\n", ret); + goto err; + } + + ret = gh_rm_vm_start(ghvm->vmid); + if (ret) { + pr_warn("Failed to start VM: %d\n", ret); + goto err; + } + + ghvm->vm_status = GH_RM_VM_STATUS_READY; + + up_write(&ghvm->status_lock); + return ret; +err: + ghvm->vm_status = GH_RM_VM_STATUS_INIT_FAILED; + up_write(&ghvm->status_lock); + return ret; +} + +static void gh_vm_stop(struct gunyah_vm *ghvm) +{ + int ret; + + down_write(&ghvm->status_lock); + if (ghvm->vm_status == GH_RM_VM_STATUS_READY) { + ret = gh_rm_vm_stop(ghvm->vmid); + if (ret) + pr_warn("Failed to stop VM: %d\n", ret); + } + + ghvm->vm_status = GH_RM_VM_STATUS_EXITED; + up_write(&ghvm->status_lock); +} + static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct gunyah_vm *ghvm = filp->private_data; @@ -79,6 +149,25 @@ static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; } + case GH_VM_SET_DTB_CONFIG: { + struct gh_vm_dtb_config dtb_config; + + r = -EFAULT; + if (copy_from_user(&dtb_config, argp, sizeof(dtb_config))) + break; + + dtb_config.size = PAGE_ALIGN(dtb_config.size); + ghvm->dtb_config = dtb_config; + + r = 0; + break; + } + case GH_VM_START: { + r = gh_vm_start(ghvm); + if (r) + r = -EINVAL; + break; + } default: r = -ENOTTY; break; @@ -92,6 +181,8 @@ static int gh_vm_release(struct inode *inode, struct file *filp) struct gunyah_vm *ghvm = filp->private_data; struct gunyah_vm_memory_mapping *mapping, *tmp; + gh_vm_stop(ghvm); + list_for_each_entry_safe(mapping, tmp, &ghvm->memory_mappings, list) { gh_vm_mem_mapping_reclaim(ghvm, mapping); } diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h index ab1f0cb0758a..38ce3a2d9329 100644 --- a/drivers/virt/gunyah/vm_mgr.h +++ b/drivers/virt/gunyah/vm_mgr.h @@ -9,6 +9,7 @@ #include #include #include +#include #include @@ -31,6 +32,12 @@ struct gunyah_vm_memory_mapping { struct gunyah_vm { u16 vmid; + enum gh_rm_vm_auth_mechanism auth; + struct gh_vm_dtb_config dtb_config; + + enum gh_rm_vm_status vm_status; + struct rw_semaphore status_lock; + struct mutex mm_lock; struct list_head memory_mappings; }; @@ -39,5 +46,7 @@ struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_alloc(struct gunyah_vm *ghvm, struct gh_userspace_memory_region *region); void gh_vm_mem_mapping_reclaim(struct gunyah_vm *ghvm, struct gunyah_vm_memory_mapping *mapping); struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find(struct gunyah_vm *ghvm, u32 label); +struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find_mapping(struct gunyah_vm *ghvm, + u64 gpa, u32 size); #endif diff --git a/drivers/virt/gunyah/vm_mgr_mm.c b/drivers/virt/gunyah/vm_mgr_mm.c index a5a57a38ee09..a7ca9a2e1627 100644 --- a/drivers/virt/gunyah/vm_mgr_mm.c +++ b/drivers/virt/gunyah/vm_mgr_mm.c @@ -34,11 +34,6 @@ void gh_vm_mem_mapping_reclaim(struct gunyah_vm *ghvm, struct gunyah_vm_memory_m int i, ret = 0; if (mapping->parcel.mem_handle != GH_MEM_HANDLE_INVAL) { - down_read(&ghvm->status_lock); - if (mapping->parcel.mem_handle == ghvm->primary_mem_handle && - ghvm->vm_status == GH_RM_VM_STATUS_NO_STATE) - ghvm->primary_mem_handle = 0; - up_read(&ghvm->status_lock); ret = gh_rm_mem_reclaim(&mapping->parcel); if (ret) pr_warn("Failed to reclaim memory parcel for label %d: %d\n", @@ -58,6 +53,30 @@ void gh_vm_mem_mapping_reclaim(struct gunyah_vm *ghvm, struct gunyah_vm_memory_m mutex_unlock(&ghvm->mm_lock); } +struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find_mapping(struct gunyah_vm *ghvm, + u64 gpa, u32 size) +{ + struct gunyah_vm_memory_mapping *mapping = NULL; + int ret; + + ret = mutex_lock_interruptible(&ghvm->mm_lock); + if (ret) + return ERR_PTR(ret); + + list_for_each_entry(mapping, &ghvm->memory_mappings, list) { + if (gpa >= mapping->guest_phys_addr && + (gpa + size <= mapping->guest_phys_addr + + (mapping->npages << PAGE_SHIFT))) { + goto unlock; + } + } + + mapping = NULL; +unlock: + mutex_unlock(&ghvm->mm_lock); + return mapping; +} + struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find(struct gunyah_vm *ghvm, u32 label) { struct gunyah_vm_memory_mapping *mapping; diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h index 93f4b99fcaf6..575cb1cbd215 100644 --- a/include/uapi/linux/gunyah.h +++ b/include/uapi/linux/gunyah.h @@ -42,4 +42,12 @@ struct gh_userspace_memory_region { #define GH_VM_SET_USER_MEM_REGION _IOW(GH_IOCTL_TYPE, 0x41, \ struct gh_userspace_memory_region) +struct gh_vm_dtb_config { + __u64 gpa; + __u64 size; +}; +#define GH_VM_SET_DTB_CONFIG _IOW(GH_IOCTL_TYPE, 0x42, struct gh_vm_dtb_config) + +#define GH_VM_START _IO(GH_IOCTL_TYPE, 0x45) + #endif