From patchwork Mon Dec 19 22:58:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 635138 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 DBF1AC001B2 for ; Mon, 19 Dec 2022 23:05:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233115AbiLSXFY (ORCPT ); Mon, 19 Dec 2022 18:05:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232989AbiLSXD2 (ORCPT ); Mon, 19 Dec 2022 18:03:28 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B683167E8; Mon, 19 Dec 2022 15:01:09 -0800 (PST) Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2BJMN9Wk027753; Mon, 19 Dec 2022 23:00:50 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=CEq8c94IBG6Nvn6CnZAOeBhIxN7kOp8McXlsMOcGt/E=; b=ZDrqc8PJ9eBpd3DhCkpHL8mw95krPSUw8tEyJeWctopdnojP7lQQkWAl7foR4X39MYkT 4j0fO6QyLz1NkBM9v4lMGuCT+Q4R5QKVrZqxvhQYbwcGVDjtekt8WsgOF3rV2W2JuaJp N6j/9Yh0/114HXK03wG7WurEgfh7rzJiAmADpkjJpG5JlF2q4Gh/dvgcTwsiF2tatKan fyA5TnWVvVjMl/xT1jeWnl+ze9meK330aF6X65tVsbh29C7vkhkTWuRXhJDR6WJ2DAuP 9hbumyWnrPghdhBjlHX3eUC0W/v7o0zdnnuqDSryCAhr9xlso6ujWFGZi8RuhVYv17Ng Jg== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3mh34udrf7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Dec 2022 23:00:50 +0000 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 2BJN0n2W007943 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Dec 2022 23:00:49 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; Mon, 19 Dec 2022 15:00:48 -0800 From: Elliot Berman To: Bjorn Andersson , Elliot Berman , Murali Nalajala CC: Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Prakruthi Deepak Heragu , Arnd Bergmann , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , "Bagas Sanjaya" , Catalin Marinas , Will Deacon , Jassi Brar , "Sudeep Holla" , Mark Rutland , "Lorenzo Pieralisi" , Dmitry Baryshkov , , , , , , Subject: [PATCH v8 23/28] virt: gunyah: Add resource tickets Date: Mon, 19 Dec 2022 14:58:44 -0800 Message-ID: <20221219225850.2397345-24-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221219225850.2397345-1-quic_eberman@quicinc.com> References: <20221219225850.2397345-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] 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: 4_OVl2SDQwk6HGf4b6SFB5ryrjLKLYYt X-Proofpoint-GUID: 4_OVl2SDQwk6HGf4b6SFB5ryrjLKLYYt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-19_01,2022-12-15_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 phishscore=0 impostorscore=0 mlxscore=0 adultscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212190202 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Some VM functions need to acquire Gunyah resources. For instance, Gunyah vCPUs are exposed to the host as a resource. The Gunyah vCPU function will register a resource ticket and be able to interact with the hypervisor once the resource ticket is filled. Signed-off-by: Elliot Berman --- drivers/virt/gunyah/vm_mgr.c | 93 ++++++++++++++++++++++++++++++++++- drivers/virt/gunyah/vm_mgr.h | 5 ++ include/linux/gunyah.h | 1 + include/linux/gunyah_vm_mgr.h | 14 ++++++ 4 files changed, 112 insertions(+), 1 deletion(-) diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c index a5bda4d6613b..3328b84fa681 100644 --- a/drivers/virt/gunyah/vm_mgr.c +++ b/drivers/virt/gunyah/vm_mgr.c @@ -115,6 +115,56 @@ static long gh_vm_add_function(struct gunyah_vm *ghvm, struct gunyah_vm_function return r; } +int ghvm_add_resource_ticket(struct gunyah_vm *ghvm, struct gunyah_vm_resource_ticket *ticket) +{ + struct gunyah_vm_resource_ticket *iter; + struct gunyah_resource *ghrsc; + int ret = 0; + + mutex_lock(&ghvm->resources_lock); + list_for_each_entry(iter, &ghvm->resource_tickets, list) { + if (iter->resource_type == ticket->resource_type && iter->label == ticket->label) { + ret = -EEXIST; + goto out; + } + } + + if (!try_module_get(ticket->owner)) { + ret = -ENODEV; + goto out; + } + + list_add(&ticket->list, &ghvm->resource_tickets); + INIT_LIST_HEAD(&ticket->resources); + + list_for_each_entry(ghrsc, &ghvm->resources, list) { + if (ghrsc->type == ticket->resource_type && ghrsc->rm_label == ticket->label) { + if (!ticket->populate(ticket, ghrsc)) + list_move(&ghrsc->list, &ticket->resources); + } + } +out: + mutex_unlock(&ghvm->resources_lock); + return ret; +} +EXPORT_SYMBOL_GPL(ghvm_add_resource_ticket); + +void ghvm_remove_resource_ticket(struct gunyah_vm *ghvm, struct gunyah_vm_resource_ticket *ticket) +{ + struct gunyah_resource *ghrsc; + + mutex_lock(&ghvm->resources_lock); + list_for_each_entry(ghrsc, &ticket->resources, list) { + ticket->unpopulate(ticket, ghrsc); + list_move(&ghrsc->list, &ghvm->resources); + } + + module_put(ticket->owner); + list_del(&ticket->list); + mutex_unlock(&ghvm->resources_lock); +} +EXPORT_SYMBOL_GPL(ghvm_remove_resource_ticket); + static void ghvm_put(struct kref *kref) { struct gunyah_vm *ghvm = container_of(kref, struct gunyah_vm, kref); @@ -156,17 +206,41 @@ static __must_check struct gunyah_vm *gunyah_vm_alloc(struct gh_rm_rpc *rm) INIT_LIST_HEAD(&ghvm->memory_mappings); init_rwsem(&ghvm->status_lock); kref_init(&ghvm->kref); + mutex_init(&ghvm->resources_lock); + INIT_LIST_HEAD(&ghvm->resources); + INIT_LIST_HEAD(&ghvm->resource_tickets); INIT_LIST_HEAD(&ghvm->functions); return ghvm; } +static void gh_vm_add_resource(struct gunyah_vm *ghvm, struct gunyah_resource *ghrsc) +{ + struct gunyah_vm_resource_ticket *ticket; + + mutex_lock(&ghvm->resources_lock); + list_for_each_entry(ticket, &ghvm->resource_tickets, list) { + if (ghrsc->type == ticket->resource_type && ghrsc->rm_label == ticket->label) { + if (!ticket->populate(ticket, ghrsc)) { + list_add(&ghrsc->list, &ticket->resources); + goto found; + } + } + } + list_add(&ghrsc->list, &ghvm->resources); +found: + mutex_unlock(&ghvm->resources_lock); +} + static int gh_vm_start(struct gunyah_vm *ghvm) { struct gunyah_vm_memory_mapping *mapping; u64 dtb_offset; u32 mem_handle; - int ret; + ssize_t num_hyp_resources; + struct gunyah_resource *ghrsc; + struct gh_rm_hyp_resource *resources; + int ret, i; down_write(&ghvm->status_lock); if (ghvm->vm_status != GH_RM_VM_STATUS_NO_STATE) { @@ -198,6 +272,23 @@ static int gh_vm_start(struct gunyah_vm *ghvm) goto err; } + num_hyp_resources = gh_rm_get_hyp_resources(ghvm->rm, ghvm->vmid, &resources); + if (num_hyp_resources < 0) { + pr_warn("Failed to get hypervisor resources for VM: %ld\n", num_hyp_resources); + ret = -EINVAL; + goto err; + } + + for (i = 0; i < num_hyp_resources; i++) { + ghrsc = gh_rm_alloc_resource(ghvm->rm, &resources[i]); + if (!ghrsc) { + ret = -ENOMEM; + goto err; + } + + gh_vm_add_resource(ghvm, ghrsc); + } + ret = gh_rm_vm_start(ghvm->rm, ghvm->vmid); if (ret) { pr_warn("Failed to start VM: %d\n", ret); diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h index 2c4fd240792a..8a71f97960bc 100644 --- a/drivers/virt/gunyah/vm_mgr.h +++ b/drivers/virt/gunyah/vm_mgr.h @@ -7,6 +7,7 @@ #define _GH_PRIV_VM_MGR_H #include +#include #include #include #include @@ -53,6 +54,10 @@ struct gunyah_vm { struct mutex mm_lock; struct list_head memory_mappings; + struct mutex resources_lock; + struct list_head resources; + struct list_head resource_tickets; + struct list_head functions; }; diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 8cb6af88c75d..af69a3479025 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -28,6 +28,7 @@ struct gunyah_resource { int irq; /* To help allocator in resource manager */ + struct list_head list; u32 rm_label; }; diff --git a/include/linux/gunyah_vm_mgr.h b/include/linux/gunyah_vm_mgr.h index 4bb06f100ae5..3e6e6e0ab7f0 100644 --- a/include/linux/gunyah_vm_mgr.h +++ b/include/linux/gunyah_vm_mgr.h @@ -65,4 +65,18 @@ void gunyah_vm_function_unregister(struct gunyah_vm_function_driver *f); } \ module_exit(_name##_mod_exit) +struct gunyah_vm_resource_ticket { + struct list_head list; + struct list_head resources; + enum gunyah_resource_type resource_type; + u32 label; + + struct module *owner; + int (*populate)(struct gunyah_vm_resource_ticket *ticket, struct gunyah_resource *ghrsc); + void (*unpopulate)(struct gunyah_vm_resource_ticket *ticket, struct gunyah_resource *ghrsc); +}; + +int ghvm_add_resource_ticket(struct gunyah_vm *ghvm, struct gunyah_vm_resource_ticket *ticket); +void ghvm_remove_resource_ticket(struct gunyah_vm *ghvm, struct gunyah_vm_resource_ticket *ticket); + #endif