| /* |
| * Copyright 2019 The Hafnium Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * https://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include "hf/types.h" |
| |
| /* clang-format off */ |
| |
| #define SPCI_LOW_32_ID 0x84000060 |
| #define SPCI_HIGH_32_ID 0x8400007F |
| #define SPCI_LOW_64_ID 0xC4000060 |
| #define SPCI_HIGH_32_ID 0x8400007F |
| |
| /* SPCI function identifiers. */ |
| #define SPCI_VERSION_32 0x84000060 |
| #define SPCI_MSG_BUF_LIST_EXCHANGE_32 0x84000061 |
| #define SPCI_MSG_RECV_32 0x84000062 |
| #define SPCI_MSG_PUT_32 0x84000063 |
| #define SPCI_MSG_SEND_32 0x84000064 |
| #define SPCI_MSG_SEND_REC_32 0x84000065 |
| #define SPCI_RUN_32 0x84000066 |
| #define SPCI_YIELD_32 0x84000067 |
| |
| /* SPCI return codes. */ |
| #define SPCI_SUCCESS INT32_C(0) |
| #define SPCI_NOT_SUPPORTED INT32_C(-1) |
| #define SPCI_INVALID_PARAMETERS INT32_C(-2) |
| #define SPCI_NO_MEMORY INT32_C(-3) |
| #define SPCI_BUSY INT32_C(-4) |
| #define SPCI_INTERRUPTED INT32_C(-5) |
| #define SPCI_DENIED INT32_C(-6) |
| /* TODO: return code currently undefined in SPCI alpha2. */ |
| #define SPCI_RETRY INT32_C(-7) |
| |
| /* Architected memory sharing message IDs. */ |
| enum spci_memory_share { |
| SPCI_MEMORY_DONATE = 0x2, |
| }; |
| |
| /* SPCI function specific constants. */ |
| #define SPCI_MSG_RECV_BLOCK_MASK 0x1 |
| #define SPCI_MSG_SEND_NOTIFY_MASK 0x1 |
| |
| #define SPCI_MESSAGE_ARCHITECTED 0x0 |
| #define SPCI_MESSAGE_IMPDEF 0x1 |
| #define SPCI_MESSAGE_IMPDEF_MASK 0x1 |
| |
| #define SPCI_MSG_SEND_NOTIFY 0x1 |
| #define SPCI_MSG_RECV_BLOCK 0x1 |
| |
| /* The maximum length possible for a single message. */ |
| #define SPCI_MSG_PAYLOAD_MAX (HF_MAILBOX_SIZE - sizeof(struct spci_message)) |
| |
| /* clang-format on */ |
| |
| /** The ID of a VM. These are assigned sequentially. */ |
| typedef uint16_t spci_vm_id_t; |
| typedef uint32_t spci_memory_handle_t; |
| |
| /** |
| * A count of VMs. This has the same range as the VM IDs but we give it a |
| * different name to make the different semantics clear. |
| */ |
| typedef spci_vm_id_t spci_vm_count_t; |
| |
| /** The index of a vCPU within a particular VM. */ |
| typedef uint16_t spci_vcpu_index_t; |
| |
| /** |
| * A count of vCPUs. This has the same range as the vCPU indices but we give it |
| * a different name to make the different semantics clear. |
| */ |
| typedef spci_vcpu_index_t spci_vcpu_count_t; |
| |
| /** Return type of SPCI functions. */ |
| /* TODO: Reuse spci_return_t type on all SPCI functions declarations. */ |
| typedef int32_t spci_return_t; |
| |
| /** SPCI common message header. */ |
| struct spci_message { |
| /* |
| * TODO: version is part of SPCI alpha2 but will be |
| * removed in the next spec revision hence we are not |
| * including it in the header. |
| */ |
| |
| /** |
| * flags[0]: |
| * 0: Architected message payload; |
| * 1: Implementation defined message payload. |
| * flags[15:1] reserved (MBZ). |
| */ |
| uint16_t flags; |
| |
| /* |
| * TODO: Padding is present to ensure controlled offset |
| * of the length field. SPCI spec must be updated |
| * to reflect this (TBD). |
| */ |
| uint16_t reserved_1; |
| |
| uint32_t length; |
| spci_vm_id_t target_vm_id; |
| spci_vm_id_t source_vm_id; |
| |
| /* |
| * TODO: Padding is present to ensure that the field |
| * payload alignment is 64B. SPCI spec must be updated |
| * to reflect this. |
| */ |
| uint32_t reserved_2; |
| |
| uint8_t payload[]; |
| }; |
| |
| struct spci_architected_message_header { |
| uint16_t type; |
| |
| /* |
| * TODO: Padding is present to ensure that the field |
| * payload is aligned on a 64B boundary. SPCI |
| * spec must be updated to reflect this. |
| */ |
| uint16_t reserved[3]; |
| uint8_t payload[]; |
| }; |
| |
| struct spci_memory_region_constituent { |
| uint64_t address; |
| uint32_t page_count; |
| |
| uint32_t reserved; |
| }; |
| |
| struct spci_memory_region { |
| spci_memory_handle_t handle; |
| uint32_t count; |
| |
| struct spci_memory_region_constituent constituents[]; |
| }; |
| |
| /* TODO: Move all the functions below this line to a support library. */ |
| /** |
| * Fill all the fields, except for the flags, in the SPCI message common header. |
| */ |
| static inline void spci_common_header_init(struct spci_message *message, |
| uint32_t message_length, |
| spci_vm_id_t target_vm_id, |
| spci_vm_id_t source_vm_id) |
| { |
| message->length = message_length; |
| message->target_vm_id = target_vm_id; |
| message->source_vm_id = source_vm_id; |
| |
| /* |
| * TODO: Reserved fields in the common message header will be |
| * defined as MBZ in next SPCI spec updates. |
| */ |
| message->reserved_1 = 0; |
| message->reserved_2 = 0; |
| } |
| |
| /** |
| * Set the SPCI implementation defined message header fields. |
| */ |
| static inline void spci_message_init(struct spci_message *message, |
| uint32_t message_length, |
| spci_vm_id_t target_vm_id, |
| spci_vm_id_t source_vm_id) |
| { |
| spci_common_header_init(message, message_length, target_vm_id, |
| source_vm_id); |
| |
| message->flags = SPCI_MESSAGE_IMPDEF; |
| } |
| |
| /** |
| * Obtain a pointer to the architected header in the spci_message. |
| * |
| * Note: the argument "message" has const qualifier. This qualifier |
| * is meant to forbid changes in information enclosed in the |
| * struct spci_message. The spci_architected_message_header, for which |
| * a pointer is returned in this function, is not part of spci_message. |
| * Its information is meant to be changed and hence the returned pointer |
| * does not have const type qualifier. |
| */ |
| static inline struct spci_architected_message_header * |
| spci_get_architected_message_header(const struct spci_message *message) |
| { |
| return (struct spci_architected_message_header *)message->payload; |
| } |
| |
| /** |
| * Helper method to fill in the information about the architected message. |
| */ |
| static inline void spci_architected_message_init(struct spci_message *message, |
| uint32_t message_length, |
| spci_vm_id_t target_vm_id, |
| spci_vm_id_t source_vm_id, |
| enum spci_memory_share type) |
| { |
| struct spci_architected_message_header *architected_header; |
| |
| spci_common_header_init(message, message_length, target_vm_id, |
| source_vm_id); |
| message->flags = SPCI_MESSAGE_ARCHITECTED; |
| |
| /* Fill the architected header. */ |
| architected_header = spci_get_architected_message_header(message); |
| architected_header->type = type; |
| architected_header->reserved[0] = 0; |
| architected_header->reserved[1] = 0; |
| architected_header->reserved[2] = 0; |
| } |
| |
| /** Obtain a pointer to the start of the memory region in the donate message. */ |
| static inline struct spci_memory_region *spci_get_donated_memory_region( |
| struct spci_message *message) |
| { |
| struct spci_architected_message_header *architected_header = |
| spci_get_architected_message_header(message); |
| return (struct spci_memory_region *)architected_header->payload; |
| } |
| |
| /** |
| * Add a memory region to the current message. |
| * A memory region is composed of one or more constituents. |
| */ |
| static inline void spci_memory_region_add( |
| struct spci_message *message, spci_memory_handle_t handle, |
| const struct spci_memory_region_constituent constituents[], |
| uint32_t num_constituents) |
| { |
| struct spci_memory_region *memory_region = |
| spci_get_donated_memory_region(message); |
| |
| uint32_t constituents_length = |
| num_constituents * |
| sizeof(struct spci_memory_region_constituent); |
| uint32_t index; |
| |
| memory_region->handle = handle; |
| memory_region->count = num_constituents; |
| |
| for (index = 0; index < num_constituents; index++) { |
| memory_region->constituents[index] = constituents[index]; |
| memory_region->constituents[index].reserved = 0; |
| } |
| |
| /* |
| * TODO: Add assert ensuring that the specified message |
| * length is not greater than SPCI_MSG_PAYLOAD_MAX. |
| */ |
| message->length += |
| sizeof(struct spci_memory_region) + constituents_length; |
| } |
| |
| /** Construct the SPCI donate memory region message. */ |
| static inline void spci_memory_donate( |
| struct spci_message *message, spci_vm_id_t target_vm_id, |
| spci_vm_id_t source_vm_id, |
| struct spci_memory_region_constituent *region_constituents, |
| uint32_t num_elements, uint32_t handle) |
| { |
| int32_t message_length; |
| |
| message_length = sizeof(struct spci_architected_message_header); |
| |
| /* Fill in the details on the common message header. */ |
| spci_architected_message_init(message, message_length, target_vm_id, |
| source_vm_id, SPCI_MEMORY_DONATE); |
| |
| /* Create single memory region. */ |
| spci_memory_region_add(message, handle, region_constituents, |
| num_elements); |
| } |