From patchwork Sat Dec 16 00:20:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 13495220 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 841D78478; Sat, 16 Dec 2023 00:21:22 +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="kat3yxwR" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BFNwAFE004538; Sat, 16 Dec 2023 00:21:07 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=097Lg5UbfQcA28si9W7NPg/edYUMo3HojM0j6uxPB9A =; b=kat3yxwRpOQkMdG39Jm4DuN9YrLwkX4DiquBeSy72/Wq4si6Y51jJiqdQx2 UKlboxYt5MGfPMiCiDXFL4qHCSAYpx8IoXojH4HVkjHzD+Wo8tWFLppF4mmY8YoZ FQ7f2auyfN6eZc+x62f6zy+Jo7TR+WXr+qBPcmpZdQ/1EUVL1Du7FBgzMHhD0qTL ciTwei/CNNkaTza1FvtsfuGMDulb/eylDp16CyzQde6MKikc/YdoeZXPDYtOPzD2 7YTIY/U719/E9HmG3VdW3zwE1PF9dK123Gpud/pfDchtWXSWXHuq3mj0C75fZrvZ xuG31OgvAXxPDI5wz6kXdMqXoqQ== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v0hb1te8h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:06 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BG0L5vG015533 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:05 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 16:21:04 -0800 From: Elliot Berman Date: Fri, 15 Dec 2023 16:20:49 -0800 Subject: [PATCH RFC v15 08/30] gunyah: rsc_mgr: Add VM lifecycle RPC 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-v15-8-192a5d872a30@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-GUID: bFBq5_zDxgzvm16wmXcgmF-2zqnatjci X-Proofpoint-ORIG-GUID: bFBq5_zDxgzvm16wmXcgmF-2zqnatjci 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_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 adultscore=0 priorityscore=1501 bulkscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312160000 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 | 570 ++++++++++++++++++++++++++++++++++++++ include/linux/gunyah_rsc_mgr.h | 144 ++++++++++ 3 files changed, 715 insertions(+), 1 deletion(-) diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile index c2308389f551..b1bdf3e84155 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -gunyah_rsc_mgr-y += rsc_mgr.o +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o obj-$(CONFIG_GUNYAH) += gunyah.o gunyah_rsc_mgr.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..9954512dbdde --- /dev/null +++ b/drivers/virt/gunyah/rsc_mgr_rpc.c @@ -0,0 +1,570 @@ +// 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: Memory Management */ +#define GUNYAH_RM_RPC_MEM_LEND 0x51000012 +#define GUNYAH_RM_RPC_MEM_SHARE 0x51000013 +#define GUNYAH_RM_RPC_MEM_RECLAIM 0x51000015 +#define GUNYAH_RM_RPC_MEM_APPEND 0x51000018 + +/* Message IDs: VM Management */ +/* clang-format off */ +#define GUNYAH_RM_RPC_VM_ALLOC_VMID 0x56000001 +#define GUNYAH_RM_RPC_VM_DEALLOC_VMID 0x56000002 +#define GUNYAH_RM_RPC_VM_START 0x56000004 +#define GUNYAH_RM_RPC_VM_STOP 0x56000005 +#define GUNYAH_RM_RPC_VM_RESET 0x56000006 +#define GUNYAH_RM_RPC_VM_CONFIG_IMAGE 0x56000009 +#define GUNYAH_RM_RPC_VM_INIT 0x5600000B +#define GUNYAH_RM_RPC_VM_SET_BOOT_CONTEXT 0x5600000C +#define GUNYAH_RM_RPC_VM_GET_HYP_RESOURCES 0x56000020 +#define GUNYAH_RM_RPC_VM_GET_VMID 0x56000024 +#define GUNYAH_RM_RPC_VM_SET_DEMAND_PAGING 0x56000033 +#define GUNYAH_RM_RPC_VM_SET_ADDRESS_LAYOUT 0x56000034 +/* clang-format on */ + +/* Message IDs: Miscellaneous */ +/* clang-format off */ +#define GUNYAH_RM_RPC_GET_LOG_ADDRESS 0x56000100 +/* clang-format on */ + +struct gunyah_rm_vm_common_vmid_req { + __le16 vmid; + __le16 _padding; +} __packed; + +/* Call: MEM_LEND, MEM_SHARE */ +#define GUNYAH_MEM_SHARE_REQ_FLAGS_APPEND BIT(1) + +struct gunyah_rm_mem_share_req_header { + u8 mem_type; + u8 _padding0; + u8 flags; + u8 _padding1; + __le32 label; +} __packed; + +struct gunyah_rm_mem_share_req_acl_section { + __le32 n_entries; + struct gunyah_rm_mem_acl_entry entries[]; +} __packed; + +struct gunyah_rm_mem_share_req_mem_section { + __le16 n_entries; + __le16 _padding; + struct gunyah_rm_mem_entry entries[]; +} __packed; + +/* Call: MEM_RELEASE */ +struct gunyah_rm_mem_release_req { + __le32 mem_handle; + u8 flags; /* currently not used */ + u8 _padding0; + __le16 _padding1; +} __packed; + +/* Call: MEM_APPEND */ +#define GUNYAH_MEM_APPEND_REQ_FLAGS_END BIT(0) + +struct gunyah_rm_mem_append_req_header { + __le32 mem_handle; + u8 flags; + u8 _padding0; + __le16 _padding1; +} __packed; + +/* Call: VM_ALLOC */ +struct gunyah_rm_vm_alloc_vmid_resp { + __le16 vmid; + __le16 _padding; +} __packed; + +/* Call: VM_STOP */ +#define GUNYAH_RM_VM_STOP_FLAG_FORCE_STOP BIT(0) + +#define GUNYAH_RM_VM_STOP_REASON_FORCE_STOP 3 + +struct gunyah_rm_vm_stop_req { + __le16 vmid; + u8 flags; + u8 _padding; + __le32 stop_reason; +} __packed; + +/* Call: VM_CONFIG_IMAGE */ +struct gunyah_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; + +#define GUNYAH_RM_MAX_MEM_ENTRIES 512 + +/* Call: VM_SET_BOOT_CONTEXT */ +struct gunyah_rm_vm_set_boot_context_req { + __le16 vmid; + u8 reg_set; + u8 reg_index; + __le32 _padding; + __le64 value; +} __packed; + +/* Call: VM_SET_DEMAND_PAGING */ +struct gunyah_rm_vm_set_demand_paging_req { + __le16 vmid; + __le16 _padding; + __le32 range_count; + DECLARE_FLEX_ARRAY(struct gunyah_rm_mem_entry, ranges); +} __packed; + +/* Call: VM_SET_ADDRESS_LAYOUT */ +struct gunyah_rm_vm_set_address_layout_req { + __le16 vmid; + __le16 _padding; + __le32 range_id; + __le64 range_base; + __le64 range_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 gunyah_rm_common_vmid_call(struct gunyah_rm *rm, u32 message_id, + u16 vmid) +{ + struct gunyah_rm_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + + return gunyah_rm_call(rm, message_id, &req_payload, sizeof(req_payload), + NULL, NULL); +} + +static int gunyah_rm_mem_append(struct gunyah_rm *rm, u32 mem_handle, + struct gunyah_rm_mem_entry *entries, + size_t n_entries) +{ + struct gunyah_rm_mem_append_req_header *req __free(kfree) = NULL; + struct gunyah_rm_mem_share_req_mem_section *mem; + int ret = 0; + size_t n; + + req = kzalloc(sizeof(*req) + struct_size(mem, entries, GUNYAH_RM_MAX_MEM_ENTRIES), + GFP_KERNEL); + if (!req) + return -ENOMEM; + + req->mem_handle = cpu_to_le32(mem_handle); + mem = (void *)(req + 1); + + while (n_entries) { + req->flags = 0; + if (n_entries > GUNYAH_RM_MAX_MEM_ENTRIES) { + n = GUNYAH_RM_MAX_MEM_ENTRIES; + } else { + req->flags |= GUNYAH_MEM_APPEND_REQ_FLAGS_END; + n = n_entries; + } + + mem->n_entries = cpu_to_le16(n); + memcpy(mem->entries, entries, sizeof(*entries) * n); + + ret = gunyah_rm_call(rm, GUNYAH_RM_RPC_MEM_APPEND, req, + sizeof(*req) + struct_size(mem, entries, n), + NULL, NULL); + if (ret) + break; + + entries += n; + n_entries -= n; + } + + return ret; +} + +/** + * gunyah_rm_mem_share() - Share memory with other virtual machines. + * @rm: Handle to a Gunyah resource manager + * @p: Information about the memory to be shared. + * + * Sharing keeps Linux's access to the memory while the memory parcel is shared. + */ +int gunyah_rm_mem_share(struct gunyah_rm *rm, struct gunyah_rm_mem_parcel *p) +{ + u32 message_id = p->n_acl_entries == 1 ? GUNYAH_RM_RPC_MEM_LEND : + GUNYAH_RM_RPC_MEM_SHARE; + size_t msg_size, initial_mem_entries = p->n_mem_entries, resp_size; + struct gunyah_rm_mem_share_req_acl_section *acl; + struct gunyah_rm_mem_share_req_mem_section *mem; + struct gunyah_rm_mem_share_req_header *req_header; + size_t acl_size, mem_size; + u32 *attr_section; + bool need_append = false; + __le32 *resp; + void *msg; + int ret; + + if (!p->acl_entries || !p->n_acl_entries || !p->mem_entries || + !p->n_mem_entries || p->n_acl_entries > U8_MAX || + p->mem_handle != GUNYAH_MEM_HANDLE_INVAL) + return -EINVAL; + + if (initial_mem_entries > GUNYAH_RM_MAX_MEM_ENTRIES) { + initial_mem_entries = GUNYAH_RM_MAX_MEM_ENTRIES; + need_append = true; + } + + acl_size = struct_size(acl, entries, p->n_acl_entries); + mem_size = struct_size(mem, entries, initial_mem_entries); + + /* The format of the message goes: + * request header + * ACL entries (which VMs get what kind of access to this memory parcel) + * Memory entries (list of memory regions to share) + * Memory attributes (currently unused, we'll hard-code the size to 0) + */ + msg_size = sizeof(struct gunyah_rm_mem_share_req_header) + acl_size + + mem_size + + sizeof(u32); /* for memory attributes, currently unused */ + + msg = kzalloc(msg_size, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + req_header = msg; + acl = (void *)req_header + sizeof(*req_header); + mem = (void *)acl + acl_size; + attr_section = (void *)mem + mem_size; + + req_header->mem_type = p->mem_type; + if (need_append) + req_header->flags |= GUNYAH_MEM_SHARE_REQ_FLAGS_APPEND; + req_header->label = cpu_to_le32(p->label); + + acl->n_entries = cpu_to_le32(p->n_acl_entries); + memcpy(acl->entries, p->acl_entries, + flex_array_size(acl, entries, p->n_acl_entries)); + + mem->n_entries = cpu_to_le16(initial_mem_entries); + memcpy(mem->entries, p->mem_entries, + flex_array_size(mem, entries, initial_mem_entries)); + + /* Set n_entries for memory attribute section to 0 */ + *attr_section = 0; + + ret = gunyah_rm_call(rm, message_id, msg, msg_size, (void **)&resp, + &resp_size); + kfree(msg); + + if (ret) + return ret; + + p->mem_handle = le32_to_cpu(*resp); + kfree(resp); + + if (need_append) { + ret = gunyah_rm_mem_append( + rm, p->mem_handle, &p->mem_entries[initial_mem_entries], + p->n_mem_entries - initial_mem_entries); + if (ret) { + gunyah_rm_mem_reclaim(rm, p); + p->mem_handle = GUNYAH_MEM_HANDLE_INVAL; + } + } + + return ret; +} + +/** + * gunyah_rm_mem_reclaim() - Reclaim a memory parcel + * @rm: Handle to a Gunyah resource manager + * @parcel: Information about the memory to be reclaimed. + * + * RM maps the associated memory back into the stage-2 page tables of the owner VM. + */ +int gunyah_rm_mem_reclaim(struct gunyah_rm *rm, + struct gunyah_rm_mem_parcel *parcel) +{ + struct gunyah_rm_mem_release_req req = { + .mem_handle = cpu_to_le32(parcel->mem_handle), + }; + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_MEM_RECLAIM, &req, sizeof(req), + NULL, NULL); +} + +/** + * gunyah_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. + * + * Return: the allocated VMID or negative value on error + */ +int gunyah_rm_alloc_vmid(struct gunyah_rm *rm, u16 vmid) +{ + struct gunyah_rm_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + struct gunyah_rm_vm_alloc_vmid_resp *resp_payload; + size_t resp_size; + void *resp; + int ret; + + ret = gunyah_rm_call(rm, GUNYAH_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; +} + +/** + * gunyah_rm_dealloc_vmid() - Dispose of a VMID + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gunyah_rm_alloc_vmid + */ +int gunyah_rm_dealloc_vmid(struct gunyah_rm *rm, u16 vmid) +{ + return gunyah_rm_common_vmid_call(rm, GUNYAH_RM_RPC_VM_DEALLOC_VMID, + vmid); +} + +/** + * gunyah_rm_vm_reset() - Reset a VM's resources + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gunyah_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 gunyah_rm_vm_reset(struct gunyah_rm *rm, u16 vmid) +{ + return gunyah_rm_common_vmid_call(rm, GUNYAH_RM_RPC_VM_RESET, vmid); +} + +/** + * gunyah_rm_vm_start() - Move a VM into "ready to run" state + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier allocated with gunyah_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 gunyah_rm_vm_start(struct gunyah_rm *rm, u16 vmid) +{ + return gunyah_rm_common_vmid_call(rm, GUNYAH_RM_RPC_VM_START, vmid); +} + +/** + * gunyah_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 gunyah_rm_alloc_vmid + */ +int gunyah_rm_vm_stop(struct gunyah_rm *rm, u16 vmid) +{ + struct gunyah_rm_vm_stop_req req_payload = { + .vmid = cpu_to_le16(vmid), + .flags = GUNYAH_RM_VM_STOP_FLAG_FORCE_STOP, + .stop_reason = cpu_to_le32(GUNYAH_RM_VM_STOP_REASON_FORCE_STOP), + }; + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_STOP, &req_payload, + sizeof(req_payload), NULL, NULL); +} + +/** + * gunyah_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 gunyah_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 gunyah_rm_vm_configure(struct gunyah_rm *rm, u16 vmid, + enum gunyah_rm_vm_auth_mechanism auth_mechanism, + u32 mem_handle, u64 image_offset, u64 image_size, + u64 dtb_offset, u64 dtb_size) +{ + struct gunyah_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 gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_CONFIG_IMAGE, &req_payload, + sizeof(req_payload), NULL, NULL); +} + +/** + * gunyah_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 gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid) +{ + return gunyah_rm_common_vmid_call(rm, GUNYAH_RM_RPC_VM_INIT, vmid); +} + +int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set, + u8 reg_index, u64 value) +{ + struct gunyah_rm_vm_set_boot_context_req req_payload = { + .vmid = cpu_to_le16(vmid), + .reg_set = reg_set, + .reg_index = reg_index, + .value = cpu_to_le64(value), + }; + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_SET_BOOT_CONTEXT, + &req_payload, sizeof(req_payload), NULL, NULL); +} + +/** + * gunyah_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 gunyah_rm_get_hyp_resources and contains the returned hypervisor resources. + * Caller must free the resources pointer if successful. + */ +int gunyah_rm_get_hyp_resources(struct gunyah_rm *rm, u16 vmid, + struct gunyah_rm_hyp_resources **resources) +{ + struct gunyah_rm_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + struct gunyah_rm_hyp_resources *resp; + size_t resp_size; + int ret; + + ret = gunyah_rm_call(rm, GUNYAH_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; +} + +/** + * gunyah_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 gunyah_rm_get_vmid(struct gunyah_rm *rm, u16 *vmid) +{ + static u16 cached_vmid = GUNYAH_VMID_INVAL; + size_t resp_size; + __le32 *resp; + int ret; + + if (cached_vmid != GUNYAH_VMID_INVAL) { + *vmid = cached_vmid; + return 0; + } + + ret = gunyah_rm_call(rm, GUNYAH_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(gunyah_rm_get_vmid); + +/** + * gunyah_rm_vm_set_demand_paging() - Enable demand paging of memory regions + * @rm: Handle to a Gunyah resource manager + * @vmid: VMID of the other VM + * @count: Number of demand paged memory regions + * @entries: Array of the regions + */ +int gunyah_rm_vm_set_demand_paging(struct gunyah_rm *rm, u16 vmid, u32 count, + struct gunyah_rm_mem_entry *entries) +{ + struct gunyah_rm_vm_set_demand_paging_req *req __free(kfree) = NULL; + size_t req_size; + + req_size = struct_size(req, ranges, count); + if (req_size == SIZE_MAX) + return -EINVAL; + + req = kzalloc(req_size, GFP_KERNEL); + if (!req) + return -ENOMEM; + + req->vmid = cpu_to_le16(vmid); + req->range_count = cpu_to_le32(count); + memcpy(req->ranges, entries, sizeof(*entries) * count); + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_SET_DEMAND_PAGING, req, + req_size, NULL, NULL); +} + +/** + * gunyah_rm_vm_set_address_layout() - Set the start address of images + * @rm: Handle to a Gunyah resource manager + * @vmid: VMID of the other VM + * @range_id: Which image to set + * @base_address: Base address + * @size: Size + */ +int gunyah_rm_vm_set_address_layout(struct gunyah_rm *rm, u16 vmid, + enum gunyah_rm_range_id range_id, + u64 base_address, u64 size) +{ + struct gunyah_rm_vm_set_address_layout_req req = { + .vmid = cpu_to_le16(vmid), + .range_id = cpu_to_le32(range_id), + .range_base = cpu_to_le64(base_address), + .range_size = cpu_to_le64(size), + }; + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_SET_ADDRESS_LAYOUT, &req, + sizeof(req), NULL, NULL); +} diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index e151f66be96e..7bd2bee91f3e 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -10,6 +10,7 @@ #include #define GUNYAH_VMID_INVAL U16_MAX +#define GUNYAH_MEM_HANDLE_INVAL U32_MAX struct gunyah_rm; int gunyah_rm_notifier_register(struct gunyah_rm *rm, @@ -19,4 +20,147 @@ int gunyah_rm_notifier_unregister(struct gunyah_rm *rm, struct device *gunyah_rm_get(struct gunyah_rm *rm); void gunyah_rm_put(struct gunyah_rm *rm); +struct gunyah_rm_vm_exited_payload { + __le16 vmid; + __le16 exit_type; + __le32 exit_reason_size; + u8 exit_reason[]; +} __packed; + +enum gunyah_rm_notification_id { + /* clang-format off */ + GUNYAH_RM_NOTIFICATION_VM_EXITED = 0x56100001, + GUNYAH_RM_NOTIFICATION_VM_STATUS = 0x56100008, + /* clang-format on */ +}; + +enum gunyah_rm_vm_status { + /* clang-format off */ + GUNYAH_RM_VM_STATUS_NO_STATE = 0, + GUNYAH_RM_VM_STATUS_INIT = 1, + GUNYAH_RM_VM_STATUS_READY = 2, + GUNYAH_RM_VM_STATUS_RUNNING = 3, + GUNYAH_RM_VM_STATUS_PAUSED = 4, + GUNYAH_RM_VM_STATUS_LOAD = 5, + GUNYAH_RM_VM_STATUS_AUTH = 6, + GUNYAH_RM_VM_STATUS_INIT_FAILED = 8, + GUNYAH_RM_VM_STATUS_EXITED = 9, + GUNYAH_RM_VM_STATUS_RESETTING = 10, + GUNYAH_RM_VM_STATUS_RESET = 11, + /* clang-format on */ +}; + +struct gunyah_rm_vm_status_payload { + __le16 vmid; + u16 reserved; + u8 vm_status; + u8 os_status; + __le16 app_status; +} __packed; + +#define GUNYAH_RM_ACL_X BIT(0) +#define GUNYAH_RM_ACL_W BIT(1) +#define GUNYAH_RM_ACL_R BIT(2) + +struct gunyah_rm_mem_acl_entry { + __le16 vmid; + u8 perms; + u8 reserved; +} __packed; + +struct gunyah_rm_mem_entry { + __le64 phys_addr; + __le64 size; +} __packed; + +enum gunyah_rm_mem_type { + GUNYAH_RM_MEM_TYPE_NORMAL = 0, + GUNYAH_RM_MEM_TYPE_IO = 1, +}; + +/* + * struct gunyah_rm_mem_parcel - Info about memory to be lent/shared/donated/reclaimed + * @mem_type: The type of memory: normal (DDR) or IO + * @label: An client-specified identifier which can be used by the other VMs to identify the purpose + * of the memory parcel. + * @n_acl_entries: Count of the number of entries in the @acl_entries array. + * @acl_entries: An array of access control entries. Each entry specifies a VM and what access + * is allowed for the memory parcel. + * @n_mem_entries: Count of the number of entries in the @mem_entries array. + * @mem_entries: An array of regions to be associated with the memory parcel. Addresses should be + * (intermediate) physical addresses from Linux's perspective. + * @mem_handle: On success, filled with memory handle that RM allocates for this memory parcel + */ +struct gunyah_rm_mem_parcel { + enum gunyah_rm_mem_type mem_type; + u32 label; + size_t n_acl_entries; + struct gunyah_rm_mem_acl_entry *acl_entries; + size_t n_mem_entries; + struct gunyah_rm_mem_entry *mem_entries; + u32 mem_handle; +}; + +/* RPC Calls */ +int gunyah_rm_mem_share(struct gunyah_rm *rm, + struct gunyah_rm_mem_parcel *parcel); +int gunyah_rm_mem_reclaim(struct gunyah_rm *rm, + struct gunyah_rm_mem_parcel *parcel); + +int gunyah_rm_alloc_vmid(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_dealloc_vmid(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_vm_reset(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_vm_start(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_vm_stop(struct gunyah_rm *rm, u16 vmid); + +enum gunyah_rm_vm_auth_mechanism { + /* clang-format off */ + GUNYAH_RM_VM_AUTH_NONE = 0, + GUNYAH_RM_VM_AUTH_QCOM_PIL_ELF = 1, + GUNYAH_RM_VM_AUTH_QCOM_ANDROID_PVM = 2, + /* clang-format on */ +}; + +int gunyah_rm_vm_configure(struct gunyah_rm *rm, u16 vmid, + enum gunyah_rm_vm_auth_mechanism auth_mechanism, + u32 mem_handle, u64 image_offset, u64 image_size, + u64 dtb_offset, u64 dtb_size); +int gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set, + u8 reg_index, u64 value); + +struct gunyah_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 gunyah_rm_hyp_resources { + __le32 n_entries; + struct gunyah_rm_hyp_resource entries[]; +} __packed; + +int gunyah_rm_get_hyp_resources(struct gunyah_rm *rm, u16 vmid, + struct gunyah_rm_hyp_resources **resources); +int gunyah_rm_get_vmid(struct gunyah_rm *rm, u16 *vmid); + +int gunyah_rm_vm_set_demand_paging(struct gunyah_rm *rm, u16 vmid, u32 count, + struct gunyah_rm_mem_entry *mem_entries); + +enum gunyah_rm_range_id { + GUNYAH_RM_RANGE_ID_IMAGE = 0, + GUNYAH_RM_RANGE_ID_FIRMWARE = 1, +}; + +int gunyah_rm_vm_set_address_layout(struct gunyah_rm *rm, u16 vmid, + enum gunyah_rm_range_id range_id, + u64 base_address, u64 size); + #endif