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
|
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
from struct import pack
from time import sleep
import errno
import glob
import os
import subprocess
try:
import pytest
except ImportError:
print("Unable to import pytest python module.")
print("\nIf not already installed, you may do so with:")
print("\t\tpip3 install pytest")
exit(1)
SOCKETS = glob.glob('/sys/bus/auxiliary/devices/intel_vsec.sdsi.*')
NUM_SOCKETS = len(SOCKETS)
MODULE_NAME = 'intel_sdsi'
DEV_PREFIX = 'intel_vsec.sdsi'
CLASS_DIR = '/sys/bus/auxiliary/devices'
GUID = "0x6dd191"
def read_bin_file(file):
with open(file, mode='rb') as f:
content = f.read()
return content
def get_dev_file_path(socket, file):
return CLASS_DIR + '/' + DEV_PREFIX + '.' + str(socket) + '/' + file
def kmemleak_enabled():
kmemleak = "/sys/kernel/debug/kmemleak"
return os.path.isfile(kmemleak)
class TestSDSiDriver:
def test_driver_loaded(self):
lsmod_p = subprocess.Popen(('lsmod'), stdout=subprocess.PIPE)
result = subprocess.check_output(('grep', '-q', MODULE_NAME), stdin=lsmod_p.stdout)
@pytest.mark.parametrize('socket', range(0, NUM_SOCKETS))
class TestSDSiFilesClass:
def read_value(self, file):
f = open(file, "r")
value = f.read().strip("\n")
return value
def get_dev_folder(self, socket):
return CLASS_DIR + '/' + DEV_PREFIX + '.' + str(socket) + '/'
def test_sysfs_files_exist(self, socket):
folder = self.get_dev_folder(socket)
print (folder)
assert os.path.isfile(folder + "guid") == True
assert os.path.isfile(folder + "provision_akc") == True
assert os.path.isfile(folder + "provision_cap") == True
assert os.path.isfile(folder + "state_certificate") == True
assert os.path.isfile(folder + "registers") == True
def test_sysfs_file_permissions(self, socket):
folder = self.get_dev_folder(socket)
mode = os.stat(folder + "guid").st_mode & 0o777
assert mode == 0o444 # Read all
mode = os.stat(folder + "registers").st_mode & 0o777
assert mode == 0o400 # Read owner
mode = os.stat(folder + "provision_akc").st_mode & 0o777
assert mode == 0o200 # Read owner
mode = os.stat(folder + "provision_cap").st_mode & 0o777
assert mode == 0o200 # Read owner
mode = os.stat(folder + "state_certificate").st_mode & 0o777
assert mode == 0o400 # Read owner
def test_sysfs_file_ownership(self, socket):
folder = self.get_dev_folder(socket)
st = os.stat(folder + "guid")
assert st.st_uid == 0
assert st.st_gid == 0
st = os.stat(folder + "registers")
assert st.st_uid == 0
assert st.st_gid == 0
st = os.stat(folder + "provision_akc")
assert st.st_uid == 0
assert st.st_gid == 0
st = os.stat(folder + "provision_cap")
assert st.st_uid == 0
assert st.st_gid == 0
st = os.stat(folder + "state_certificate")
assert st.st_uid == 0
assert st.st_gid == 0
def test_sysfs_file_sizes(self, socket):
folder = self.get_dev_folder(socket)
if self.read_value(folder + "guid") == GUID:
st = os.stat(folder + "registers")
assert st.st_size == 72
st = os.stat(folder + "provision_akc")
assert st.st_size == 1024
st = os.stat(folder + "provision_cap")
assert st.st_size == 1024
st = os.stat(folder + "state_certificate")
assert st.st_size == 4096
def test_no_seek_allowed(self, socket):
folder = self.get_dev_folder(socket)
rand_file = bytes(os.urandom(8))
f = open(folder + "provision_cap", "wb", 0)
f.seek(1)
with pytest.raises(OSError) as error:
f.write(rand_file)
assert error.value.errno == errno.ESPIPE
f.close()
f = open(folder + "provision_akc", "wb", 0)
f.seek(1)
with pytest.raises(OSError) as error:
f.write(rand_file)
assert error.value.errno == errno.ESPIPE
f.close()
def test_registers_seek(self, socket):
folder = self.get_dev_folder(socket)
# Check that the value read from an offset of the entire
# file is none-zero and the same as the value read
# from seeking to the same location
f = open(folder + "registers", "rb")
data = f.read()
f.seek(64)
id = f.read()
assert id != bytes(0)
assert data[64:] == id
f.close()
@pytest.mark.parametrize('socket', range(0, NUM_SOCKETS))
class TestSDSiMailboxCmdsClass:
def test_provision_akc_eoverflow_1017_bytes(self, socket):
# The buffer for writes is 1k, of with 8 bytes must be
# reserved for the command, leaving 1016 bytes max.
# Check that we get an overflow error for 1017 bytes.
node = get_dev_file_path(socket, "provision_akc")
rand_file = bytes(os.urandom(1017))
f = open(node, 'wb', 0)
with pytest.raises(OSError) as error:
f.write(rand_file)
assert error.value.errno == errno.EOVERFLOW
f.close()
@pytest.mark.parametrize('socket', range(0, NUM_SOCKETS))
class TestSdsiDriverLocksClass:
def test_enodev_when_pci_device_removed(self, socket):
node = get_dev_file_path(socket, "provision_akc")
dev_name = DEV_PREFIX + '.' + str(socket)
driver_dir = CLASS_DIR + '/' + dev_name + "/driver/"
rand_file = bytes(os.urandom(8))
f = open(node, 'wb', 0)
g = open(node, 'wb', 0)
with open(driver_dir + 'unbind', 'w') as k:
print(dev_name, file = k)
with pytest.raises(OSError) as error:
f.write(rand_file)
assert error.value.errno == errno.ENODEV
with pytest.raises(OSError) as error:
g.write(rand_file)
assert error.value.errno == errno.ENODEV
f.close()
g.close()
# Short wait needed to allow file to close before pulling driver
sleep(1)
p = subprocess.Popen(('modprobe', '-r', 'intel_sdsi'))
p.wait()
p = subprocess.Popen(('modprobe', '-r', 'intel_vsec'))
p.wait()
p = subprocess.Popen(('modprobe', 'intel_vsec'))
p.wait()
# Short wait needed to allow driver time to get inserted
# before continuing tests
sleep(1)
def test_memory_leak(self, socket):
if not kmemleak_enabled():
pytest.skip("kmemleak not enabled in kernel")
dev_name = DEV_PREFIX + '.' + str(socket)
driver_dir = CLASS_DIR + '/' + dev_name + "/driver/"
with open(driver_dir + 'unbind', 'w') as k:
print(dev_name, file = k)
sleep(1)
subprocess.check_output(('modprobe', '-r', 'intel_sdsi'))
subprocess.check_output(('modprobe', '-r', 'intel_vsec'))
with open('/sys/kernel/debug/kmemleak', 'w') as f:
print('scan', file = f)
sleep(5)
assert os.stat('/sys/kernel/debug/kmemleak').st_size == 0
subprocess.check_output(('modprobe', 'intel_vsec'))
sleep(1)
|
