1 #!/bin/bash 1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 3
4 SYSFS= 4 SYSFS=
5 # Kselftest framework requirement - SKIP code 5 # Kselftest framework requirement - SKIP code is 4.
6 ksft_skip=4 6 ksft_skip=4
7 retval=0 7 retval=0
8 8
9 prerequisite() 9 prerequisite()
10 { 10 {
11 msg="skip all tests:" 11 msg="skip all tests:"
12 12
13 if [ $UID != 0 ]; then 13 if [ $UID != 0 ]; then
14 echo $msg must be run as root 14 echo $msg must be run as root >&2
15 exit $ksft_skip 15 exit $ksft_skip
16 fi 16 fi
17 17
18 taskset -p 01 $$ 18 taskset -p 01 $$
19 19
20 SYSFS=`mount -t sysfs | head -1 | awk 20 SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
21 21
22 if [ ! -d "$SYSFS" ]; then 22 if [ ! -d "$SYSFS" ]; then
23 echo $msg sysfs is not mounted 23 echo $msg sysfs is not mounted >&2
24 exit $ksft_skip 24 exit $ksft_skip
25 fi 25 fi
26 26
27 if ! ls $SYSFS/devices/system/cpu/cpu* 27 if ! ls $SYSFS/devices/system/cpu/cpu* > /dev/null 2>&1; then
28 echo $msg cpu hotplug is not s 28 echo $msg cpu hotplug is not supported >&2
29 exit $ksft_skip 29 exit $ksft_skip
30 fi 30 fi
31 31
32 echo "CPU online/offline summary:" 32 echo "CPU online/offline summary:"
33 online_cpus=`cat $SYSFS/devices/system 33 online_cpus=`cat $SYSFS/devices/system/cpu/online`
34 online_max=${online_cpus##*-} 34 online_max=${online_cpus##*-}
35 35
36 if [[ "$online_cpus" = "$online_max" ] 36 if [[ "$online_cpus" = "$online_max" ]]; then
37 echo "$msg: since there is onl 37 echo "$msg: since there is only one cpu: $online_cpus"
38 exit $ksft_skip 38 exit $ksft_skip
39 fi 39 fi
40 40
41 present_cpus=`cat $SYSFS/devices/syste 41 present_cpus=`cat $SYSFS/devices/system/cpu/present`
42 present_max=${present_cpus##*-} 42 present_max=${present_cpus##*-}
43 echo "present_cpus = $present_cpus pre 43 echo "present_cpus = $present_cpus present_max = $present_max"
44 44
45 echo -e "\t Cpus in online state: $onl 45 echo -e "\t Cpus in online state: $online_cpus"
46 46
47 offline_cpus=`cat $SYSFS/devices/syste 47 offline_cpus=`cat $SYSFS/devices/system/cpu/offline`
48 if [[ "a$offline_cpus" = "a" ]]; then 48 if [[ "a$offline_cpus" = "a" ]]; then
49 offline_cpus=0 49 offline_cpus=0
50 else 50 else
51 offline_max=${offline_cpus##*- 51 offline_max=${offline_cpus##*-}
52 fi 52 fi
53 echo -e "\t Cpus in offline state: $of 53 echo -e "\t Cpus in offline state: $offline_cpus"
54 } 54 }
55 55
56 # 56 #
57 # list all hot-pluggable CPUs 57 # list all hot-pluggable CPUs
58 # 58 #
59 hotpluggable_cpus() 59 hotpluggable_cpus()
60 { 60 {
61 local state=${1:-.\*} 61 local state=${1:-.\*}
62 62
63 for cpu in $SYSFS/devices/system/cpu/c 63 for cpu in $SYSFS/devices/system/cpu/cpu*; do
64 if [ -f $cpu/online ] && grep 64 if [ -f $cpu/online ] && grep -q $state $cpu/online; then
65 echo ${cpu##/*/cpu} 65 echo ${cpu##/*/cpu}
66 fi 66 fi
67 done 67 done
68 } 68 }
69 69
70 hotplaggable_offline_cpus() 70 hotplaggable_offline_cpus()
71 { 71 {
72 hotpluggable_cpus 0 72 hotpluggable_cpus 0
73 } 73 }
74 74
75 hotpluggable_online_cpus() 75 hotpluggable_online_cpus()
76 { 76 {
77 hotpluggable_cpus 1 77 hotpluggable_cpus 1
78 } 78 }
79 79
80 cpu_is_online() 80 cpu_is_online()
81 { 81 {
82 grep -q 1 $SYSFS/devices/system/cpu/cp 82 grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
83 } 83 }
84 84
85 cpu_is_offline() 85 cpu_is_offline()
86 { 86 {
87 grep -q 0 $SYSFS/devices/system/cpu/cp 87 grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
88 } 88 }
89 89
90 online_cpu() 90 online_cpu()
91 { 91 {
92 echo 1 > $SYSFS/devices/system/cpu/cpu 92 echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
93 } 93 }
94 94
95 offline_cpu() 95 offline_cpu()
96 { 96 {
97 echo 0 > $SYSFS/devices/system/cpu/cpu 97 echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
98 } 98 }
99 99
100 online_cpu_expect_success() 100 online_cpu_expect_success()
101 { 101 {
102 local cpu=$1 102 local cpu=$1
103 103
104 if ! online_cpu $cpu; then 104 if ! online_cpu $cpu; then
105 echo $FUNCNAME $cpu: unexpecte 105 echo $FUNCNAME $cpu: unexpected fail >&2
106 retval=1 106 retval=1
107 elif ! cpu_is_online $cpu; then 107 elif ! cpu_is_online $cpu; then
108 echo $FUNCNAME $cpu: unexpecte 108 echo $FUNCNAME $cpu: unexpected offline >&2
109 retval=1 109 retval=1
110 fi 110 fi
111 } 111 }
112 112
113 online_cpu_expect_fail() 113 online_cpu_expect_fail()
114 { 114 {
115 local cpu=$1 115 local cpu=$1
116 116
117 if online_cpu $cpu 2> /dev/null; then 117 if online_cpu $cpu 2> /dev/null; then
118 echo $FUNCNAME $cpu: unexpecte 118 echo $FUNCNAME $cpu: unexpected success >&2
119 retval=1 119 retval=1
120 elif ! cpu_is_offline $cpu; then 120 elif ! cpu_is_offline $cpu; then
121 echo $FUNCNAME $cpu: unexpecte 121 echo $FUNCNAME $cpu: unexpected online >&2
122 retval=1 122 retval=1
123 fi 123 fi
124 } 124 }
125 125
126 offline_cpu_expect_success() 126 offline_cpu_expect_success()
127 { 127 {
128 local cpu=$1 128 local cpu=$1
129 129
130 if ! offline_cpu $cpu; then 130 if ! offline_cpu $cpu; then
131 echo $FUNCNAME $cpu: unexpecte 131 echo $FUNCNAME $cpu: unexpected fail >&2
132 retval=1 132 retval=1
133 elif ! cpu_is_offline $cpu; then 133 elif ! cpu_is_offline $cpu; then
134 echo $FUNCNAME $cpu: unexpecte 134 echo $FUNCNAME $cpu: unexpected offline >&2
135 retval=1 135 retval=1
136 fi 136 fi
137 } 137 }
138 138
139 offline_cpu_expect_fail() 139 offline_cpu_expect_fail()
140 { 140 {
141 local cpu=$1 141 local cpu=$1
142 142
143 if offline_cpu $cpu 2> /dev/null; then 143 if offline_cpu $cpu 2> /dev/null; then
144 echo $FUNCNAME $cpu: unexpecte 144 echo $FUNCNAME $cpu: unexpected success >&2
145 retval=1 145 retval=1
146 elif ! cpu_is_online $cpu; then 146 elif ! cpu_is_online $cpu; then
147 echo $FUNCNAME $cpu: unexpecte 147 echo $FUNCNAME $cpu: unexpected offline >&2
148 retval=1 148 retval=1
149 fi 149 fi
150 } 150 }
151 151
152 online_all_hot_pluggable_cpus() 152 online_all_hot_pluggable_cpus()
153 { 153 {
154 for cpu in `hotplaggable_offline_cpus` 154 for cpu in `hotplaggable_offline_cpus`; do
155 online_cpu_expect_success $cpu 155 online_cpu_expect_success $cpu
156 done 156 done
157 } 157 }
158 158
159 offline_all_hot_pluggable_cpus() 159 offline_all_hot_pluggable_cpus()
160 { 160 {
161 local reserve_cpu=$online_max 161 local reserve_cpu=$online_max
162 for cpu in `hotpluggable_online_cpus`; 162 for cpu in `hotpluggable_online_cpus`; do
163 # Reserve one cpu oneline at l 163 # Reserve one cpu oneline at least.
164 if [ $cpu -eq $reserve_cpu ];t 164 if [ $cpu -eq $reserve_cpu ];then
165 continue 165 continue
166 fi 166 fi
167 offline_cpu_expect_success $cp 167 offline_cpu_expect_success $cpu
168 done 168 done
169 } 169 }
170 170
171 allcpus=0 171 allcpus=0
172 online_cpus=0 172 online_cpus=0
173 online_max=0 173 online_max=0
174 offline_cpus=0 174 offline_cpus=0
175 offline_max=0 175 offline_max=0
176 present_cpus=0 176 present_cpus=0
177 present_max=0 177 present_max=0
178 178
179 while getopts ah opt; do 179 while getopts ah opt; do
180 case $opt in 180 case $opt in
181 a) 181 a)
182 allcpus=1 182 allcpus=1
183 ;; 183 ;;
184 h) 184 h)
185 echo "Usage $0 [ -a ]" 185 echo "Usage $0 [ -a ]"
186 echo -e "\t default offline on 186 echo -e "\t default offline one cpu"
187 echo -e "\t run with -a option 187 echo -e "\t run with -a option to offline all cpus"
188 exit 188 exit
189 ;; 189 ;;
190 esac 190 esac
191 done 191 done
192 192
193 prerequisite 193 prerequisite
194 194
195 # 195 #
196 # Safe test (default) - offline and online one 196 # Safe test (default) - offline and online one cpu
197 # 197 #
198 if [ $allcpus -eq 0 ]; then 198 if [ $allcpus -eq 0 ]; then
199 echo "Limited scope test: one hotplug 199 echo "Limited scope test: one hotplug cpu"
200 echo -e "\t (leaves cpu in the origina 200 echo -e "\t (leaves cpu in the original state):"
201 echo -e "\t online to offline to onlin 201 echo -e "\t online to offline to online: cpu $online_max"
202 offline_cpu_expect_success $online_max 202 offline_cpu_expect_success $online_max
203 online_cpu_expect_success $online_max 203 online_cpu_expect_success $online_max
204 204
205 if [[ $offline_cpus -gt 0 ]]; then 205 if [[ $offline_cpus -gt 0 ]]; then
206 echo -e "\t online to offline 206 echo -e "\t online to offline to online: cpu $present_max"
207 online_cpu_expect_success $pre 207 online_cpu_expect_success $present_max
208 offline_cpu_expect_success $pr 208 offline_cpu_expect_success $present_max
209 online_cpu $present_max 209 online_cpu $present_max
210 fi 210 fi
211 exit $retval 211 exit $retval
212 else 212 else
213 echo "Full scope test: all hotplug cpu 213 echo "Full scope test: all hotplug cpus"
214 echo -e "\t online all offline cpus" 214 echo -e "\t online all offline cpus"
215 echo -e "\t offline all online cpus" 215 echo -e "\t offline all online cpus"
216 echo -e "\t online all offline cpus" 216 echo -e "\t online all offline cpus"
217 fi 217 fi
218 218
219 online_all_hot_pluggable_cpus 219 online_all_hot_pluggable_cpus
220 220
221 offline_all_hot_pluggable_cpus 221 offline_all_hot_pluggable_cpus
222 222
223 online_all_hot_pluggable_cpus 223 online_all_hot_pluggable_cpus
224 224
225 exit $retval 225 exit $retval
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