Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
3a65dfe8 JA |
2 | # |
3 | # Block layer core configuration | |
4 | # | |
16ed002f | 5 | menuconfig BLOCK |
6a108a14 | 6 | bool "Enable the block layer" if EXPERT |
9361401e | 7 | default y |
88459642 | 8 | select SBITMAP |
6a83e74d | 9 | select SRCU |
9361401e | 10 | help |
ee86418d | 11 | Provide block layer support for the kernel. |
9361401e | 12 | |
ee86418d NA |
13 | Disable this option to remove the block layer support from the |
14 | kernel. This may be useful for embedded devices. | |
15 | ||
16 | If this option is disabled: | |
17 | ||
18 | - block device files will become unusable | |
19 | - some filesystems (such as ext3) will become unavailable. | |
20 | ||
21 | Also, SCSI character devices and USB storage will be disabled since | |
22 | they make use of various block layer definitions and facilities. | |
9361401e DH |
23 | |
24 | Say Y here unless you know you really don't want to mount disks and | |
25 | suchlike. | |
26 | ||
27 | if BLOCK | |
3a65dfe8 | 28 | |
fbdee71b CH |
29 | config BLOCK_LEGACY_AUTOLOAD |
30 | bool "Legacy autoloading support" | |
31 | help | |
32 | Enable loading modules and creating block device instances based on | |
33 | accesses through their device special file. This is a historic Linux | |
34 | feature and makes no sense in a udev world where device files are | |
35 | created on demand. | |
36 | ||
37 | Say N here unless booting or other functionality broke without it, in | |
38 | which case you should also send a report to your distribution and | |
39 | linux-block@vger.kernel.org. | |
40 | ||
6f816b4b TH |
41 | config BLK_RQ_ALLOC_TIME |
42 | bool | |
43 | ||
1d156646 TH |
44 | config BLK_CGROUP_RWSTAT |
45 | bool | |
46 | ||
78011042 CH |
47 | config BLK_DEV_BSG_COMMON |
48 | tristate | |
3d6392cf | 49 | |
5ef16305 CH |
50 | config BLK_ICQ |
51 | bool | |
52 | ||
aa387cc8 MC |
53 | config BLK_DEV_BSGLIB |
54 | bool "Block layer SG support v4 helper lib" | |
78011042 | 55 | select BLK_DEV_BSG_COMMON |
aa387cc8 MC |
56 | help |
57 | Subsystems will normally enable this if needed. Users will not | |
58 | normally need to manually enable this. | |
59 | ||
60 | If unsure, say N. | |
61 | ||
7ba1ba12 MP |
62 | config BLK_DEV_INTEGRITY |
63 | bool "Block layer data integrity support" | |
a7f7f624 | 64 | help |
7ba1ba12 MP |
65 | Some storage devices allow extra information to be |
66 | stored/retrieved to help protect the data. The block layer | |
67 | data integrity option provides hooks which can be used by | |
68 | filesystems to ensure better data integrity. | |
69 | ||
70 | Say yes here if you have a storage device that provides the | |
71 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
72 | Protection. If in doubt, say N. | |
73 | ||
a754bd5f HX |
74 | config BLK_DEV_INTEGRITY_T10 |
75 | tristate | |
76 | depends on BLK_DEV_INTEGRITY | |
77 | select CRC_T10DIF | |
78 | ||
6a0cb1bc HR |
79 | config BLK_DEV_ZONED |
80 | bool "Zoned block device support" | |
b9aef63a | 81 | select MQ_IOSCHED_DEADLINE |
a7f7f624 | 82 | help |
6a0cb1bc | 83 | Block layer zoned block device support. This option enables |
240e6ee2 KB |
84 | support for ZAC/ZBC/ZNS host-managed and host-aware zoned block |
85 | devices. | |
6a0cb1bc | 86 | |
240e6ee2 | 87 | Say yes here if you have a ZAC, ZBC, or ZNS storage device. |
6a0cb1bc | 88 | |
e43473b7 VG |
89 | config BLK_DEV_THROTTLING |
90 | bool "Block layer bio throttling support" | |
df252bde | 91 | depends on BLK_CGROUP |
1d156646 | 92 | select BLK_CGROUP_RWSTAT |
a7f7f624 | 93 | help |
e43473b7 VG |
94 | Block layer bio throttling support. It can be used to limit |
95 | the IO rate to a device. IO rate policies are per cgroup and | |
96 | one needs to mount and use blkio cgroup controller for creating | |
97 | cgroups and specifying per device IO rate policies. | |
98 | ||
da82c92f | 99 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
e43473b7 | 100 | |
327ffb9b SL |
101 | config BLK_DEV_THROTTLING_LOW |
102 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" | |
103 | depends on BLK_DEV_THROTTLING | |
a7f7f624 | 104 | help |
327ffb9b SL |
105 | Add .low limit interface for block throttling. The low limit is a best |
106 | effort limit to prioritize cgroups. Depending on the setting, the limit | |
107 | can be used to protect cgroups in terms of bandwidth/iops and better | |
108 | utilize disk resource. | |
109 | ||
110 | Note, this is an experimental interface and could be changed someday. | |
111 | ||
87760e5e JA |
112 | config BLK_WBT |
113 | bool "Enable support for block device writeback throttling" | |
a7f7f624 | 114 | help |
87760e5e JA |
115 | Enabling this option enables the block layer to throttle buffered |
116 | background writeback from the VM, making it more smooth and having | |
117 | less impact on foreground operations. The throttling is done | |
118 | dynamically on an algorithm loosely based on CoDel, factoring in | |
119 | the realtime performance of the disk. | |
120 | ||
5f6776ba BVA |
121 | config BLK_WBT_MQ |
122 | bool "Enable writeback throttling by default" | |
123 | default y | |
124 | depends on BLK_WBT | |
125 | help | |
126 | Enable writeback throttling by default for request-based block devices. | |
127 | ||
d7067512 JB |
128 | config BLK_CGROUP_IOLATENCY |
129 | bool "Enable support for latency based cgroup IO protection" | |
df252bde | 130 | depends on BLK_CGROUP |
a7f7f624 | 131 | help |
d7067512 JB |
132 | Enabling this option enables the .latency interface for IO throttling. |
133 | The IO controller will attempt to maintain average IO latencies below | |
134 | the configured latency target, throttling anybody with a higher latency | |
135 | target than the victimized group. | |
136 | ||
137 | Note, this is an experimental interface and could be changed someday. | |
138 | ||
d2bcbeab MK |
139 | config BLK_CGROUP_FC_APPID |
140 | bool "Enable support to track FC I/O Traffic across cgroup applications" | |
d2500a0c | 141 | depends on BLK_CGROUP && NVME_FC |
d2bcbeab MK |
142 | help |
143 | Enabling this option enables the support to track FC I/O traffic across | |
144 | cgroup applications. It enables the Fabric and the storage targets to | |
145 | identify, monitor, and handle FC traffic based on VM tags by inserting | |
146 | application specific identification into the FC frame. | |
147 | ||
7caa4715 TH |
148 | config BLK_CGROUP_IOCOST |
149 | bool "Enable support for cost model based cgroup IO controller" | |
df252bde | 150 | depends on BLK_CGROUP |
cd006509 | 151 | select BLK_RQ_IO_DATA_LEN |
7caa4715 | 152 | select BLK_RQ_ALLOC_TIME |
a7f7f624 | 153 | help |
7caa4715 TH |
154 | Enabling this option enables the .weight interface for cost |
155 | model based proportional IO control. The IO controller | |
156 | distributes IO capacity between different groups based on | |
157 | their share of the overall weight distribution. | |
158 | ||
556910e3 BVA |
159 | config BLK_CGROUP_IOPRIO |
160 | bool "Cgroup I/O controller for assigning an I/O priority class" | |
161 | depends on BLK_CGROUP | |
162 | help | |
163 | Enable the .prio interface for assigning an I/O priority class to | |
164 | requests. The I/O priority class affects the order in which an I/O | |
165 | scheduler and block devices process requests. Only some I/O schedulers | |
166 | and some block devices support I/O priorities. | |
167 | ||
400f73b2 OS |
168 | config BLK_DEBUG_FS |
169 | bool "Block layer debugging information in debugfs" | |
170 | default y | |
171 | depends on DEBUG_FS | |
a7f7f624 | 172 | help |
400f73b2 OS |
173 | Include block layer debugging information in debugfs. This information |
174 | is mostly useful for kernel developers, but it doesn't incur any cost | |
175 | at runtime. | |
176 | ||
177 | Unless you are building a kernel for a tiny system, you should | |
178 | say Y here. | |
179 | ||
6a5ac984 BVA |
180 | config BLK_DEBUG_FS_ZONED |
181 | bool | |
182 | default BLK_DEBUG_FS && BLK_DEV_ZONED | |
183 | ||
455a7b23 SB |
184 | config BLK_SED_OPAL |
185 | bool "Logic for interfacing with Opal enabled SEDs" | |
a7f7f624 | 186 | help |
455a7b23 SB |
187 | Builds Logic for interfacing with Opal enabled controllers. |
188 | Enabling this option enables users to setup/unlock/lock | |
189 | Locking ranges for SED devices using the Opal protocol. | |
190 | ||
1b262839 ST |
191 | config BLK_INLINE_ENCRYPTION |
192 | bool "Enable inline encryption support in block layer" | |
193 | help | |
194 | Build the blk-crypto subsystem. Enabling this lets the | |
195 | block layer handle encryption, so users can take | |
196 | advantage of inline encryption hardware if present. | |
197 | ||
488f6682 ST |
198 | config BLK_INLINE_ENCRYPTION_FALLBACK |
199 | bool "Enable crypto API fallback for blk-crypto" | |
200 | depends on BLK_INLINE_ENCRYPTION | |
201 | select CRYPTO | |
202 | select CRYPTO_SKCIPHER | |
203 | help | |
204 | Enabling this lets the block layer handle inline encryption | |
205 | by falling back to the kernel crypto API when inline | |
206 | encryption hardware is not present. | |
207 | ||
9be96f3f AV |
208 | source "block/partitions/Kconfig" |
209 | ||
99874d50 | 210 | config BLOCK_COMPAT |
c50fca55 | 211 | def_bool COMPAT |
99874d50 | 212 | |
8ec2ef2b | 213 | config BLK_MQ_PCI |
c50fca55 | 214 | def_bool PCI |
8ec2ef2b | 215 | |
73473427 CH |
216 | config BLK_MQ_VIRTIO |
217 | bool | |
c50fca55 | 218 | depends on VIRTIO |
73473427 CH |
219 | default y |
220 | ||
24c5dc66 SG |
221 | config BLK_MQ_RDMA |
222 | bool | |
c50fca55 | 223 | depends on INFINIBAND |
24c5dc66 SG |
224 | default y |
225 | ||
bca6b067 | 226 | config BLK_PM |
c50fca55 | 227 | def_bool PM |
bca6b067 | 228 | |
c66fd019 CH |
229 | # do not use in new code |
230 | config BLOCK_HOLDER_DEPRECATED | |
231 | bool | |
232 | ||
8636a1f9 | 233 | source "block/Kconfig.iosched" |
c50fca55 MY |
234 | |
235 | endif # BLOCK |