aboutsummaryrefslogtreecommitdiff
path: root/tftf/tests/runtime_services/secure_service/ffa_helpers.c
blob: 7ccf89003a4e95a71ca3e93754949692818ea213 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/*
 * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <debug.h>
#include <smccc.h>
#include <ffa_helpers.h>
#include <ffa_svc.h>

#define OPTEE_FFA_GET_API_VERSION	(0)
#define OPTEE_FFA_GET_OS_VERSION	(1)
#define OPTEE_FFA_GET_OS_VERSION_MAJOR	(3)
#define OPTEE_FFA_GET_OS_VERSION_MINOR	(8)

/*-----------------------------------------------------------------------------
 * FFA_RUN
 *
 * Parameters
 *     uint32 Function ID (w0): 0x8400006D
 *     uint32 Target information (w1): Information to identify target SP/VM
 *         -Bits[31:16]: ID of SP/VM.
 *         -Bits[15:0]: ID of vCPU of SP/VM to run.
 *     Other Parameter registers w2-w7/x2-x7: Reserved (MBZ)
 *
 * On failure, returns FFA_ERROR in w0 and error code in w2:
 *     -INVALID_PARAMETERS: Unrecognized endpoint or vCPU ID
 *     -NOT_SUPPORTED: This function is not implemented at this FFA instance
 *     -DENIED: Callee is not in a state to handle this request
 *     -BUSY: vCPU is busy and caller must retry later
 *     -ABORTED: vCPU or VM ran into an unexpected error and has aborted
 */
smc_ret_values ffa_run(uint32_t dest_id, uint32_t vcpu_id)
{
	smc_args args = {
		FFA_MSG_RUN,
		(dest_id << 16) | vcpu_id,
		0, 0, 0, 0, 0, 0
	};

	return tftf_smc(&args);
}

/*-----------------------------------------------------------------------------
 * FFA_MSG_SEND_DIRECT_REQ
 *
 * Parameters
 *     uint32 Function ID (w0): 0x8400006F / 0xC400006F
 *     uint32 Source/Destination IDs (w1): Source and destination endpoint IDs
 *         -Bit[31:16]: Source endpoint ID
 *         -Bit[15:0]: Destination endpoint ID
 *     uint32/uint64 (w2/x2) - RFU MBZ
 *     w3-w7 - Implementation defined
 *
 * On failure, returns FFA_ERROR in w0 and error code in w2:
 *     -INVALID_PARAMETERS: Invalid endpoint ID or non-zero reserved register
 *     -DENIED: Callee is not in a state to handle this request
 *     -NOT_SUPPORTED: This function is not implemented at this FFA instance
 *     -BUSY: Message target is busy
 *     -ABORTED: Message target ran into an unexpected error and has aborted
 */
static smc_ret_values __ffa_msg_send_direct_req32_5(uint32_t source_id,
						     uint32_t dest_id,
						     uint32_t arg0,
						     uint32_t arg1,
						     uint32_t arg2,
						     uint32_t arg3,
						     uint32_t arg4)
{
	smc_args args = {
		FFA_MSG_SEND_DIRECT_REQ_SMC32,
		(source_id << 16) | dest_id,
		0,
		arg0, arg1, arg2, arg3, arg4
	};

	return tftf_smc(&args);
}

/* Direct message send helper accepting a single 32b message argument */
smc_ret_values ffa_msg_send_direct_req(uint32_t source_id, uint32_t dest_id,
					uint32_t message)
{
	return __ffa_msg_send_direct_req32_5(source_id, dest_id,
					      message, 0, 0, 0, 0);
}

static smc_ret_values __ffa_msg_send_direct_req64_5(uint32_t source_id,
						     uint32_t dest_id,
						     uint64_t arg0,
						     uint64_t arg1,
						     uint64_t arg2,
						     uint64_t arg3,
						     uint64_t arg4)
{
	smc_args args = {
		FFA_MSG_SEND_DIRECT_REQ_SMC64,
		(source_id << 16) | dest_id,
		0,
		arg0, arg1, arg2, arg3, arg4
	};

	return tftf_smc(&args);
}

/* Direct message send helper accepting a single 64b message argument */
smc_ret_values ffa_msg_send_direct_req64(uint32_t source_id, uint32_t dest_id,
					uint64_t message)
{
	return __ffa_msg_send_direct_req64_5(source_id, dest_id,
					      message, 0, 0, 0, 0);
}

/*
 * check_spmc_execution_level
 *
 * Attempt sending impdef protocol messages to OP-TEE through direct messaging.
 * Criteria for detecting OP-TEE presence is that responses match defined
 * version values. In the case of SPMC running at S-EL2 (and Cactus instances
 * running at S-EL1) the response will not match the pre-defined version IDs.
 *
 * Returns true if SPMC is probed as being OP-TEE at S-EL1.
 *
 */
bool check_spmc_execution_level(void)
{
	unsigned int is_optee_spmc_criteria = 0U;
	smc_ret_values ret_values;

	/*
	 * Send a first OP-TEE-defined protocol message through
	 * FFA direct message.
	 *
	 */
	ret_values = ffa_msg_send_direct_req(HYP_ID, SP_ID(1),
					      OPTEE_FFA_GET_API_VERSION);
	if ((ret_values.ret3 == FFA_VERSION_MAJOR) &&
	    (ret_values.ret4 == FFA_VERSION_MINOR)) {
		is_optee_spmc_criteria++;
	}

	/*
	 * Send a second OP-TEE-defined protocol message through
	 * FFA direct message.
	 *
	 */
	ret_values = ffa_msg_send_direct_req(HYP_ID, SP_ID(1),
					      OPTEE_FFA_GET_OS_VERSION);
	if ((ret_values.ret3 == OPTEE_FFA_GET_OS_VERSION_MAJOR) &&
	    (ret_values.ret4 == OPTEE_FFA_GET_OS_VERSION_MINOR)) {
		is_optee_spmc_criteria++;
	}

	return (is_optee_spmc_criteria == 2U);
}

/*
 * FFA Version ABI helper.
 * Version fields:
 *	-Bits[30:16]: Major version.
 *	-Bits[15:0]: Minor version.
 */
smc_ret_values ffa_version(uint32_t input_version)
{
	smc_args args = {
		.fid = FFA_VERSION,
		.arg1 = input_version
	};

	return tftf_smc(&args);
}

smc_ret_values ffa_id_get(void)
{
	smc_args args = {
		.fid = FFA_ID_GET
	};

	return tftf_smc(&args);
}

smc_ret_values ffa_msg_wait(void)
{
	smc_args args = {
		.fid = FFA_MSG_WAIT
	};

	return tftf_smc(&args);
}

smc_ret_values ffa_msg_send_direct_resp(ffa_vm_id_t source_id,
						ffa_vm_id_t dest_id,
						uint32_t message)
{
	smc_args args = {
		.fid = FFA_MSG_SEND_DIRECT_RESP_SMC32,
		.arg1 = ((uint32_t)source_id << 16) | dest_id,
		.arg3 = message
	};

	return tftf_smc(&args);
}

smc_ret_values ffa_error(int32_t error_code)
{
	smc_args args = {
		.fid = FFA_ERROR,
		.arg1 = 0,
		.arg2 = error_code
	};

	return tftf_smc(&args);
}

/* Query the higher EL if the requested FF-A feature is implemented. */
smc_ret_values ffa_features(uint32_t feature)
{
	smc_args args = {
		.fid = FFA_FEATURES,
		.arg1 = feature
	};

	return tftf_smc(&args);
}

/* Get information about VMs or SPs based on UUID */
smc_ret_values ffa_partition_info_get(const uint32_t uuid[4])
{
	smc_args args = {
		.fid = FFA_PARTITION_INFO_GET,
		.arg1 = uuid[0],
		.arg2 = uuid[1],
		.arg3 = uuid[2],
		.arg4 = uuid[3]
	};

	return tftf_smc(&args);
}

/* Query SPMD that the rx buffer of the partition can be released */
smc_ret_values ffa_rx_release(void)
{
	smc_args args = {
		.fid = FFA_RX_RELEASE
	};

	return tftf_smc(&args);
}

/* Map the RXTX buffer */
smc_ret_values ffa_rxtx_map(uintptr_t send, uintptr_t recv, uint32_t pages)
{
	smc_args args = {
		.fid = FFA_RXTX_MAP_SMC64,
		.arg1 = send,
		.arg2 = recv,
		.arg3 = pages
	};

	return tftf_smc(&args);
}