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Mon, 19 Dec 2022 23:00:30 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 15:00:29 -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 11/28] gunyah: rsc_mgr: Add VM lifecycle RPC Date: Mon, 19 Dec 2022 14:58:32 -0800 Message-ID: <20221219225850.2397345-12-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-GUID: 1Pk9qp5ju-KRNr2axxztKt_T8xRwHN_w X-Proofpoint-ORIG-GUID: 1Pk9qp5ju-KRNr2axxztKt_T8xRwHN_w 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 bulkscore=0 mlxscore=0 impostorscore=0 spamscore=0 priorityscore=1501 suspectscore=0 phishscore=0 clxscore=1015 mlxlogscore=999 adultscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212190202 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221219_150052_940059_4069C9AD X-CRM114-Status: GOOD ( 31.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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.h | 41 ++++++ drivers/virt/gunyah/rsc_mgr_rpc.c | 224 ++++++++++++++++++++++++++++++ include/linux/gunyah_rsc_mgr.h | 50 +++++++ 4 files changed, 316 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 e7cf59b9e64e..5caa05267a58 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,4 +1,4 @@ obj-$(CONFIG_GUNYAH) += gunyah.o -gunyah_rsc_mgr-y += rsc_mgr.o +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o obj-$(CONFIG_GUNYAH_RESOURCE_MANAGER) += gunyah_rsc_mgr.o diff --git a/drivers/virt/gunyah/rsc_mgr.h b/drivers/virt/gunyah/rsc_mgr.h index b5bb36a7a4cc..1f9e3c38038e 100644 --- a/drivers/virt/gunyah/rsc_mgr.h +++ b/drivers/virt/gunyah/rsc_mgr.h @@ -33,4 +33,45 @@ 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); +/* 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_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 + +/* Call: CONSOLE_OPEN, CONSOLE_CLOSE, CONSOLE_FLUSH */ +struct gh_vm_common_vmid_req { + __le16 vmid; + __le16 reserved0; +} __packed; + +/* Call: VM_STOP */ +struct gh_vm_stop_req { + __le16 vmid; + u8 flags; + u8 reserved; + __le32 stop_reason; +} __packed; + +/* Call: VM_CONFIG_IMAGE */ +struct gh_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; + +/* Call: GET_HYP_RESOURCES */ +struct gh_vm_get_hyp_resources_resp { + __le32 n_entries; + struct gh_rm_hyp_resource entries[]; +} __packed; + #endif diff --git a/drivers/virt/gunyah/rsc_mgr_rpc.c b/drivers/virt/gunyah/rsc_mgr_rpc.c new file mode 100644 index 000000000000..8d9c1c635a27 --- /dev/null +++ b/drivers/virt/gunyah/rsc_mgr_rpc.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include + +#include "rsc_mgr.h" + +/* + * 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_rpc *rm, u32 message_id, u16 vmid) +{ + void *resp = NULL; + struct gh_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + size_t resp_size; + int ret; + + ret = gh_rm_call(rm, message_id, &req_payload, sizeof(req_payload), &resp, &resp_size); + if (!ret) + kfree(resp); + + WARN_ON(!ret && resp_size); + + return ret; +} + +/** + * gh_rm_alloc_vmid() - Allocate a new VM in Gunyah. Returns the VM identifier. + * @vmid: Use GH_VMID_INVAL to dynamically allocate a VM. A reserved VMID can also be requested + * for a special-purpose platform-defined VM. + * + * Returns - the allocated VMID or negative value on error + */ +int gh_rm_alloc_vmid(struct gh_rm_rpc *rm, u16 vmid) +{ + void *resp; + struct gh_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + struct gh_vm_common_vmid_req *resp_payload; + size_t resp_size; + int ret; + + if (vmid == GH_VMID_INVAL) + vmid = 0; + + 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) { + if (resp_size != sizeof(*resp_payload)) { + ret = -EINVAL; + } else { + resp_payload = resp; + ret = resp_payload->vmid; + } + } + kfree(resp); + + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_alloc_vmid); + +/** + * gh_rm_dealloc_vmid() - Dispose the VMID + * @vmid: VM identifier + */ +int gh_rm_dealloc_vmid(struct gh_rm_rpc *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_DEALLOC_VMID, vmid); +} +EXPORT_SYMBOL_GPL(gh_rm_dealloc_vmid); + +/** + * gh_rm_vm_start() - Move the VM into "ready to run" state + * @vmid: VM identifier + * + * 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_rpc *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_START, vmid); +} +EXPORT_SYMBOL_GPL(gh_rm_vm_start); + +/** + * gh_rm_vm_stop() - Send a request to Resource Manager VM to stop a VM. + * @vmid: VM identifier + */ +int gh_rm_vm_stop(struct gh_rm_rpc *rm, u16 vmid) +{ + struct gh_vm_stop_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + void *resp; + size_t resp_size; + int ret; + + ret = gh_rm_call(rm, GH_RM_RPC_VM_STOP, &req_payload, sizeof(req_payload), + &resp, &resp_size); + if (ret) + return ret; + kfree(resp); + + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_vm_stop); + +int gh_rm_vm_configure(struct gh_rm_rpc *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_vm_config_image_req req_payload = { 0 }; + void *resp; + size_t resp_size; + int ret; + + req_payload.vmid = cpu_to_le16(vmid); + req_payload.auth_mech = cpu_to_le32(auth_mechanism); + req_payload.mem_handle = cpu_to_le32(mem_handle); + req_payload.image_offset = cpu_to_le64(image_offset); + req_payload.image_size = cpu_to_le64(image_size); + req_payload.dtb_offset = cpu_to_le64(dtb_offset); + req_payload.dtb_size = cpu_to_le64(dtb_size); + + ret = gh_rm_call(rm, GH_RM_RPC_VM_CONFIG_IMAGE, &req_payload, sizeof(req_payload), + &resp, &resp_size); + if (ret) + return ret; + kfree(resp); + + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_vm_configure); + +/** + * gh_rm_vm_init() - Move the VM to initialized state. + * @vmid: VM identifier + * + * RM will allocate needed resources for the VM. After gh_rm_vm_init, gh_rm_get_hyp_resources() + * can be called to learn of the capabilities we can use with the new VM. + */ +int gh_rm_vm_init(struct gh_rm_rpc *rm, u16 vmid) +{ + return gh_rm_common_vmid_call(rm, GH_RM_RPC_VM_INIT, vmid); +} +EXPORT_SYMBOL_GPL(gh_rm_vm_init); + +/** + * gh_rm_get_hyp_resources() - Retrieve hypervisor resources (capabilities) associated with a VM + * @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. + * + * Return: >=0 value indicates the number of gh_rm_hyp_resource entries filled into *resources + */ +ssize_t gh_rm_get_hyp_resources(struct gh_rm_rpc *rm, u16 vmid, + struct gh_rm_hyp_resource **resources) +{ + struct gh_vm_get_hyp_resources_resp *resp; + size_t resp_size; + int ret; + struct gh_vm_common_vmid_req req_payload = { + .vmid = cpu_to_le16(vmid), + }; + + 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 < sizeof(*resp) || + (sizeof(*resp->entries) && (resp->n_entries > U32_MAX / sizeof(*resp->entries))) || + (resp_size != sizeof(*resp) + (resp->n_entries * sizeof(*resp->entries)))) { + ret = -EIO; + goto out; + } + + *resources = kmemdup(resp->entries, (resp->n_entries * sizeof(*resp->entries)), GFP_KERNEL); + ret = resp->n_entries; + +out: + kfree(resp); + return ret; +} +EXPORT_SYMBOL_GPL(gh_rm_get_hyp_resources); + +/** + * gh_rm_get_vmid() - Retrieve VMID of this virtual machine + * @vmid: Filled with the VMID of this VM + */ +int gh_rm_get_vmid(struct gh_rm_rpc *rm, u16 *vmid) +{ + static u16 cached_vmid = GH_VMID_INVAL; + void *resp; + size_t resp_size; + int ret; + int payload = 0; + + if (cached_vmid != GH_VMID_INVAL) { + *vmid = cached_vmid; + return 0; + } + + ret = gh_rm_call(rm, GH_RM_RPC_VM_GET_VMID, &payload, sizeof(payload), &resp, &resp_size); + if (ret) + return ret; + + if (resp_size != sizeof(*vmid)) + return -EIO; + *vmid = *(u16 *)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 b4f55c19954b..eb94b48c41de 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -15,4 +15,54 @@ /* Gunyah recognizes VMID0 as an alias to the current VM's ID */ #define GH_VMID_SELF 0 +struct gh_rm_rpc; + +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, +}; + +/* RPC Calls */ +int gh_rm_alloc_vmid(struct gh_rm_rpc *rm, u16 vmid); +int gh_rm_dealloc_vmid(struct gh_rm_rpc *rm, u16 vmid); +int gh_rm_vm_start(struct gh_rm_rpc *rm, u16 vmid); +int gh_rm_vm_stop(struct gh_rm_rpc *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_rpc *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_rpc *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; + +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); + #endif