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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 |
9361401e | 9 | help |
ee86418d | 10 | Provide block layer support for the kernel. |
9361401e | 11 | |
ee86418d NA |
12 | Disable this option to remove the block layer support from the |
13 | kernel. This may be useful for embedded devices. | |
14 | ||
15 | If this option is disabled: | |
16 | ||
17 | - block device files will become unusable | |
18 | - some filesystems (such as ext3) will become unavailable. | |
19 | ||
20 | Also, SCSI character devices and USB storage will be disabled since | |
21 | they make use of various block layer definitions and facilities. | |
9361401e DH |
22 | |
23 | Say Y here unless you know you really don't want to mount disks and | |
24 | suchlike. | |
25 | ||
26 | if BLOCK | |
3a65dfe8 | 27 | |
fbdee71b CH |
28 | config BLOCK_LEGACY_AUTOLOAD |
29 | bool "Legacy autoloading support" | |
451f0b6f | 30 | default y |
fbdee71b CH |
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 | |
451f0b6f CH |
35 | created on demand, but scripts that manually create device nodes and |
36 | then call losetup might rely on this behavior. | |
fbdee71b | 37 | |
6f816b4b TH |
38 | config BLK_RQ_ALLOC_TIME |
39 | bool | |
40 | ||
1d156646 TH |
41 | config BLK_CGROUP_RWSTAT |
42 | bool | |
43 | ||
78011042 CH |
44 | config BLK_DEV_BSG_COMMON |
45 | tristate | |
3d6392cf | 46 | |
5ef16305 CH |
47 | config BLK_ICQ |
48 | bool | |
49 | ||
aa387cc8 MC |
50 | config BLK_DEV_BSGLIB |
51 | bool "Block layer SG support v4 helper lib" | |
78011042 | 52 | select BLK_DEV_BSG_COMMON |
aa387cc8 MC |
53 | help |
54 | Subsystems will normally enable this if needed. Users will not | |
55 | normally need to manually enable this. | |
56 | ||
57 | If unsure, say N. | |
58 | ||
7ba1ba12 MP |
59 | config BLK_DEV_INTEGRITY |
60 | bool "Block layer data integrity support" | |
a7f7f624 | 61 | help |
7ba1ba12 MP |
62 | Some storage devices allow extra information to be |
63 | stored/retrieved to help protect the data. The block layer | |
64 | data integrity option provides hooks which can be used by | |
65 | filesystems to ensure better data integrity. | |
66 | ||
67 | Say yes here if you have a storage device that provides the | |
68 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
69 | Protection. If in doubt, say N. | |
70 | ||
a754bd5f HX |
71 | config BLK_DEV_INTEGRITY_T10 |
72 | tristate | |
73 | depends on BLK_DEV_INTEGRITY | |
74 | select CRC_T10DIF | |
a7d4383f | 75 | select CRC64_ROCKSOFT |
a754bd5f | 76 | |
6a0cb1bc HR |
77 | config BLK_DEV_ZONED |
78 | bool "Zoned block device support" | |
b9aef63a | 79 | select MQ_IOSCHED_DEADLINE |
a7f7f624 | 80 | help |
6a0cb1bc | 81 | Block layer zoned block device support. This option enables |
240e6ee2 KB |
82 | support for ZAC/ZBC/ZNS host-managed and host-aware zoned block |
83 | devices. | |
6a0cb1bc | 84 | |
240e6ee2 | 85 | Say yes here if you have a ZAC, ZBC, or ZNS storage device. |
6a0cb1bc | 86 | |
e43473b7 VG |
87 | config BLK_DEV_THROTTLING |
88 | bool "Block layer bio throttling support" | |
df252bde | 89 | depends on BLK_CGROUP |
1d156646 | 90 | select BLK_CGROUP_RWSTAT |
a7f7f624 | 91 | help |
e43473b7 VG |
92 | Block layer bio throttling support. It can be used to limit |
93 | the IO rate to a device. IO rate policies are per cgroup and | |
94 | one needs to mount and use blkio cgroup controller for creating | |
95 | cgroups and specifying per device IO rate policies. | |
96 | ||
da82c92f | 97 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
e43473b7 | 98 | |
327ffb9b SL |
99 | config BLK_DEV_THROTTLING_LOW |
100 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" | |
101 | depends on BLK_DEV_THROTTLING | |
a7f7f624 | 102 | help |
327ffb9b SL |
103 | Add .low limit interface for block throttling. The low limit is a best |
104 | effort limit to prioritize cgroups. Depending on the setting, the limit | |
105 | can be used to protect cgroups in terms of bandwidth/iops and better | |
106 | utilize disk resource. | |
107 | ||
108 | Note, this is an experimental interface and could be changed someday. | |
109 | ||
87760e5e JA |
110 | config BLK_WBT |
111 | bool "Enable support for block device writeback throttling" | |
a7f7f624 | 112 | help |
87760e5e JA |
113 | Enabling this option enables the block layer to throttle buffered |
114 | background writeback from the VM, making it more smooth and having | |
115 | less impact on foreground operations. The throttling is done | |
116 | dynamically on an algorithm loosely based on CoDel, factoring in | |
117 | the realtime performance of the disk. | |
118 | ||
5f6776ba BVA |
119 | config BLK_WBT_MQ |
120 | bool "Enable writeback throttling by default" | |
121 | default y | |
122 | depends on BLK_WBT | |
123 | help | |
124 | Enable writeback throttling by default for request-based block devices. | |
125 | ||
d7067512 JB |
126 | config BLK_CGROUP_IOLATENCY |
127 | bool "Enable support for latency based cgroup IO protection" | |
df252bde | 128 | depends on BLK_CGROUP |
a7f7f624 | 129 | help |
d7067512 JB |
130 | Enabling this option enables the .latency interface for IO throttling. |
131 | The IO controller will attempt to maintain average IO latencies below | |
132 | the configured latency target, throttling anybody with a higher latency | |
133 | target than the victimized group. | |
134 | ||
135 | Note, this is an experimental interface and could be changed someday. | |
136 | ||
d2bcbeab MK |
137 | config BLK_CGROUP_FC_APPID |
138 | bool "Enable support to track FC I/O Traffic across cgroup applications" | |
d2500a0c | 139 | depends on BLK_CGROUP && NVME_FC |
d2bcbeab MK |
140 | help |
141 | Enabling this option enables the support to track FC I/O traffic across | |
142 | cgroup applications. It enables the Fabric and the storage targets to | |
143 | identify, monitor, and handle FC traffic based on VM tags by inserting | |
144 | application specific identification into the FC frame. | |
145 | ||
7caa4715 TH |
146 | config BLK_CGROUP_IOCOST |
147 | bool "Enable support for cost model based cgroup IO controller" | |
df252bde | 148 | depends on BLK_CGROUP |
7caa4715 | 149 | select BLK_RQ_ALLOC_TIME |
a7f7f624 | 150 | help |
7caa4715 TH |
151 | Enabling this option enables the .weight interface for cost |
152 | model based proportional IO control. The IO controller | |
153 | distributes IO capacity between different groups based on | |
154 | their share of the overall weight distribution. | |
155 | ||
556910e3 BVA |
156 | config BLK_CGROUP_IOPRIO |
157 | bool "Cgroup I/O controller for assigning an I/O priority class" | |
158 | depends on BLK_CGROUP | |
159 | help | |
160 | Enable the .prio interface for assigning an I/O priority class to | |
161 | requests. The I/O priority class affects the order in which an I/O | |
162 | scheduler and block devices process requests. Only some I/O schedulers | |
163 | and some block devices support I/O priorities. | |
164 | ||
400f73b2 OS |
165 | config BLK_DEBUG_FS |
166 | bool "Block layer debugging information in debugfs" | |
167 | default y | |
168 | depends on DEBUG_FS | |
a7f7f624 | 169 | help |
400f73b2 OS |
170 | Include block layer debugging information in debugfs. This information |
171 | is mostly useful for kernel developers, but it doesn't incur any cost | |
172 | at runtime. | |
173 | ||
174 | Unless you are building a kernel for a tiny system, you should | |
175 | say Y here. | |
176 | ||
6a5ac984 BVA |
177 | config BLK_DEBUG_FS_ZONED |
178 | bool | |
179 | default BLK_DEBUG_FS && BLK_DEV_ZONED | |
180 | ||
455a7b23 SB |
181 | config BLK_SED_OPAL |
182 | bool "Logic for interfacing with Opal enabled SEDs" | |
a7f7f624 | 183 | help |
455a7b23 SB |
184 | Builds Logic for interfacing with Opal enabled controllers. |
185 | Enabling this option enables users to setup/unlock/lock | |
186 | Locking ranges for SED devices using the Opal protocol. | |
187 | ||
1b262839 ST |
188 | config BLK_INLINE_ENCRYPTION |
189 | bool "Enable inline encryption support in block layer" | |
190 | help | |
191 | Build the blk-crypto subsystem. Enabling this lets the | |
192 | block layer handle encryption, so users can take | |
193 | advantage of inline encryption hardware if present. | |
194 | ||
488f6682 ST |
195 | config BLK_INLINE_ENCRYPTION_FALLBACK |
196 | bool "Enable crypto API fallback for blk-crypto" | |
197 | depends on BLK_INLINE_ENCRYPTION | |
198 | select CRYPTO | |
199 | select CRYPTO_SKCIPHER | |
200 | help | |
201 | Enabling this lets the block layer handle inline encryption | |
202 | by falling back to the kernel crypto API when inline | |
203 | encryption hardware is not present. | |
204 | ||
9be96f3f AV |
205 | source "block/partitions/Kconfig" |
206 | ||
99874d50 | 207 | config BLOCK_COMPAT |
c50fca55 | 208 | def_bool COMPAT |
99874d50 | 209 | |
8ec2ef2b | 210 | config BLK_MQ_PCI |
c50fca55 | 211 | def_bool PCI |
8ec2ef2b | 212 | |
73473427 CH |
213 | config BLK_MQ_VIRTIO |
214 | bool | |
c50fca55 | 215 | depends on VIRTIO |
73473427 CH |
216 | default y |
217 | ||
24c5dc66 SG |
218 | config BLK_MQ_RDMA |
219 | bool | |
c50fca55 | 220 | depends on INFINIBAND |
24c5dc66 SG |
221 | default y |
222 | ||
bca6b067 | 223 | config BLK_PM |
c50fca55 | 224 | def_bool PM |
bca6b067 | 225 | |
c66fd019 CH |
226 | # do not use in new code |
227 | config BLOCK_HOLDER_DEPRECATED | |
228 | bool | |
229 | ||
248c7933 CH |
230 | config BLK_MQ_STACKING |
231 | bool | |
232 | ||
8636a1f9 | 233 | source "block/Kconfig.iosched" |
c50fca55 MY |
234 | |
235 | endif # BLOCK |