From patchwork Mon Dec 19 22:58:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 635720 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 3600BC46467 for ; Mon, 19 Dec 2022 23:05:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232798AbiLSXFV (ORCPT ); Mon, 19 Dec 2022 18:05:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232984AbiLSXDT (ORCPT ); Mon, 19 Dec 2022 18:03:19 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AC2E167E4; Mon, 19 Dec 2022 15:01:09 -0800 (PST) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2BJMcef5001250; Mon, 19 Dec 2022 23:00:42 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=Ce9NS6VF/ZlGRqo1zpRzMWmAMt+GG1MMbt0MLD3M85c=; b=SZa/AXj0gQOkBgaHG6ZWyNZRK2EJmR7UV+ekE4BGpsIfp51EfTvkBLVQsV6W7caMKD9H yxtud3PjRnlPzhvEm+mSLtaMwMheQh17J4FsPHsEdHph+lMkXnyapx5NvlMsblhBsJ83 te40oWEmQx6kBPdZaN9++Okoa1huNktVsG58HE56FLCrQUCh0uJ4IEwsJ2VFb5byXzWe 3GWMbpaGR35CpjB/0+xsNRKbU1OmTbRDtG/DYGO+n5oq3j47SETbZDK6y+JApbmQfsn8 LNVKnu9j4vp+U6u1gVhQSKF4ospb22yGa1wVG3yejoULwPCiKTjzyUEzbrY5D5sSq1h/ Aw== Received: from nasanppmta03.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3mh5v25h0m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Dec 2022 23:00:41 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 2BJN0e0m030845 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Dec 2022 23:00:40 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 15:00:39 -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 17/28] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Date: Mon, 19 Dec 2022 14:58:38 -0800 Message-ID: <20221219225850.2397345-18-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: QVRaxSI7JB3k2Xyea0G01Y-X0y1mGWqM X-Proofpoint-GUID: QVRaxSI7JB3k2Xyea0G01Y-X0y1mGWqM 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 lowpriorityscore=0 impostorscore=0 suspectscore=0 clxscore=1015 adultscore=0 malwarescore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212190202 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Qualcomm platforms, there is a firmware entity which controls access to physical pages. In order to share memory with another VM, this entity needs to be informed that the guest VM should have access to the memory. Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman --- drivers/virt/gunyah/Kconfig | 4 ++ drivers/virt/gunyah/Makefile | 1 + drivers/virt/gunyah/gunyah_platform_hooks.c | 63 +++++++++++++++++++++ drivers/virt/gunyah/rsc_mgr.h | 3 + drivers/virt/gunyah/rsc_mgr_rpc.c | 7 ++- include/linux/gunyah_rsc_mgr.h | 14 +++++ 6 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 drivers/virt/gunyah/gunyah_platform_hooks.c diff --git a/drivers/virt/gunyah/Kconfig b/drivers/virt/gunyah/Kconfig index 5e5a329c9866..e92318ec8026 100644 --- a/drivers/virt/gunyah/Kconfig +++ b/drivers/virt/gunyah/Kconfig @@ -11,11 +11,15 @@ config GUNYAH Say Y/M here to enable the drivers needed to interact in a Gunyah virtual environment. +config GUNYAH_PLATFORM_HOOKS + tristate + if GUNYAH config GUNYAH_RESOURCE_MANAGER tristate "Gunyah Resource Manager" depends on MAILBOX select GUNYAH_MESSAGE_QUEUES + select GUNYAH_PLATFORM_HOOKS help The resource manager (RM) is a privileged application VM supporting the Gunyah Hypervisor. Enable this driver to support communicating diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile index 9d6f900ab7b0..e321c009898f 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_GUNYAH) += gunyah.o +obj-$(CONFIG_GUNYAH_PLATFORM_HOOKS) += gunyah_platform_hooks.o gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o gunyah_rsc_mgr-$(CONFIG_GUNYAH_VM_MANAGER) += vm_mgr.o vm_mgr_mm.o diff --git a/drivers/virt/gunyah/gunyah_platform_hooks.c b/drivers/virt/gunyah/gunyah_platform_hooks.c new file mode 100644 index 000000000000..36cc02c75963 --- /dev/null +++ b/drivers/virt/gunyah/gunyah_platform_hooks.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include + +#include "rsc_mgr.h" + +static struct gunyah_rm_platform_ops *rm_platform_ops; +static DECLARE_RWSEM(rm_platform_ops_lock); + +int gh_rm_platform_pre_mem_share(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel) +{ + int ret = 0; + + down_read(&rm_platform_ops_lock); + if (rm_platform_ops && rm_platform_ops->pre_mem_share) + ret = rm_platform_ops->pre_mem_share(rm, mem_parcel); + up_read(&rm_platform_ops_lock); + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_platform_pre_mem_share); + +int gh_rm_platform_post_mem_reclaim(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel) +{ + int ret = 0; + + down_read(&rm_platform_ops_lock); + if (rm_platform_ops && rm_platform_ops->post_mem_reclaim) + ret = rm_platform_ops->post_mem_reclaim(rm, mem_parcel); + up_read(&rm_platform_ops_lock); + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_platform_post_mem_reclaim); + +int gh_rm_register_platform_ops(struct gunyah_rm_platform_ops *platform_ops) +{ + int ret = 0; + + down_write(&rm_platform_ops_lock); + if (!rm_platform_ops) + rm_platform_ops = platform_ops; + else + ret = -EEXIST; + up_write(&rm_platform_ops_lock); + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_register_platform_ops); + +void gh_rm_unregister_platform_ops(struct gunyah_rm_platform_ops *platform_ops) +{ + down_write(&rm_platform_ops_lock); + if (rm_platform_ops == platform_ops) + rm_platform_ops = NULL; + up_write(&rm_platform_ops_lock); +} +EXPORT_SYMBOL_GPL(gh_rm_unregister_platform_ops); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Platform Hooks"); diff --git a/drivers/virt/gunyah/rsc_mgr.h b/drivers/virt/gunyah/rsc_mgr.h index e068b5b65d2b..69554602c889 100644 --- a/drivers/virt/gunyah/rsc_mgr.h +++ b/drivers/virt/gunyah/rsc_mgr.h @@ -33,6 +33,9 @@ struct gh_rm_rpc; int gh_rm_call(struct gh_rm_rpc *rsc_mgr, u32 message_id, void *req_buff, size_t req_buff_size, void **resp_buf, size_t *resp_buff_size); +int gh_rm_platform_pre_mem_share(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel); +int gh_rm_platform_post_mem_reclaim(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel); + /* Message IDs: Memory Management */ #define GH_RM_RPC_MEM_LEND 0x51000012 #define GH_RM_RPC_MEM_SHARE 0x51000013 diff --git a/drivers/virt/gunyah/rsc_mgr_rpc.c b/drivers/virt/gunyah/rsc_mgr_rpc.c index 2c9aded7cc09..e81a0dc798e1 100644 --- a/drivers/virt/gunyah/rsc_mgr_rpc.c +++ b/drivers/virt/gunyah/rsc_mgr_rpc.c @@ -112,6 +112,10 @@ static int gh_rm_mem_lend_common(struct gh_rm_rpc *rm, u32 message_id, struct gh if (initial_n_mem_entries > GH_RM_MAX_MEM_ENTRIES) initial_n_mem_entries = GH_RM_MAX_MEM_ENTRIES; + ret = gh_rm_platform_pre_mem_share(rm, p); + if (ret) + return ret; + /* The format of the message goes: * request header * ACL entries (which VMs get what kind of access to this memory parcel) @@ -155,6 +159,7 @@ static int gh_rm_mem_lend_common(struct gh_rm_rpc *rm, u32 message_id, struct gh if (resp_size != sizeof(__le32)) { ret = -EIO; + gh_rm_platform_post_mem_reclaim(rm, p); goto out; } @@ -224,7 +229,7 @@ int gh_rm_mem_reclaim(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel) return ret; kfree(resp); - return ret; + return gh_rm_platform_post_mem_reclaim(rm, parcel); } EXPORT_SYMBOL_GPL(gh_rm_mem_reclaim); diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index 0b5b236fd76f..be434bcf9b4e 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -115,4 +115,18 @@ ssize_t gh_rm_get_hyp_resources(struct gh_rm_rpc *rm, u16 vmid, struct gh_rm_hyp_resource **resources); int gh_rm_get_vmid(struct gh_rm_rpc *rm, u16 *vmid); +struct gunyah_rm_platform_ops { + int (*pre_mem_share)(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel); + int (*post_mem_reclaim)(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel); +}; + +#if IS_ENABLED(CONFIG_GUNYAH_PLATFORM_HOOKS) +int gh_rm_register_platform_ops(struct gunyah_rm_platform_ops *platform_ops); +void gh_rm_unregister_platform_ops(struct gunyah_rm_platform_ops *platform_ops); +#else +static inline int gh_rm_register_platform_ops(struct gunyah_rm_platform_ops *platform_ops) + { return 0; } +static inline void gh_rm_unregister_platform_ops(struct gunyah_rm_platform_ops *platform_ops) { } +#endif + #endif