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 | |
6f816b4b TH |
29 | config BLK_RQ_ALLOC_TIME |
30 | bool | |
31 | ||
1d156646 TH |
32 | config BLK_CGROUP_RWSTAT |
33 | bool | |
34 | ||
78011042 CH |
35 | config BLK_DEV_BSG_COMMON |
36 | tristate | |
3d6392cf | 37 | |
aa387cc8 MC |
38 | config BLK_DEV_BSGLIB |
39 | bool "Block layer SG support v4 helper lib" | |
78011042 | 40 | select BLK_DEV_BSG_COMMON |
aa387cc8 MC |
41 | help |
42 | Subsystems will normally enable this if needed. Users will not | |
43 | normally need to manually enable this. | |
44 | ||
45 | If unsure, say N. | |
46 | ||
7ba1ba12 MP |
47 | config BLK_DEV_INTEGRITY |
48 | bool "Block layer data integrity support" | |
a7f7f624 | 49 | help |
7ba1ba12 MP |
50 | Some storage devices allow extra information to be |
51 | stored/retrieved to help protect the data. The block layer | |
52 | data integrity option provides hooks which can be used by | |
53 | filesystems to ensure better data integrity. | |
54 | ||
55 | Say yes here if you have a storage device that provides the | |
56 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
57 | Protection. If in doubt, say N. | |
58 | ||
a754bd5f HX |
59 | config BLK_DEV_INTEGRITY_T10 |
60 | tristate | |
61 | depends on BLK_DEV_INTEGRITY | |
62 | select CRC_T10DIF | |
63 | ||
6a0cb1bc HR |
64 | config BLK_DEV_ZONED |
65 | bool "Zoned block device support" | |
b9aef63a | 66 | select MQ_IOSCHED_DEADLINE |
a7f7f624 | 67 | help |
6a0cb1bc | 68 | Block layer zoned block device support. This option enables |
240e6ee2 KB |
69 | support for ZAC/ZBC/ZNS host-managed and host-aware zoned block |
70 | devices. | |
6a0cb1bc | 71 | |
240e6ee2 | 72 | Say yes here if you have a ZAC, ZBC, or ZNS storage device. |
6a0cb1bc | 73 | |
e43473b7 VG |
74 | config BLK_DEV_THROTTLING |
75 | bool "Block layer bio throttling support" | |
8e42e0a2 | 76 | depends on BLK_CGROUP=y |
1d156646 | 77 | select BLK_CGROUP_RWSTAT |
a7f7f624 | 78 | help |
e43473b7 VG |
79 | Block layer bio throttling support. It can be used to limit |
80 | the IO rate to a device. IO rate policies are per cgroup and | |
81 | one needs to mount and use blkio cgroup controller for creating | |
82 | cgroups and specifying per device IO rate policies. | |
83 | ||
da82c92f | 84 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
e43473b7 | 85 | |
327ffb9b SL |
86 | config BLK_DEV_THROTTLING_LOW |
87 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" | |
88 | depends on BLK_DEV_THROTTLING | |
a7f7f624 | 89 | help |
327ffb9b SL |
90 | Add .low limit interface for block throttling. The low limit is a best |
91 | effort limit to prioritize cgroups. Depending on the setting, the limit | |
92 | can be used to protect cgroups in terms of bandwidth/iops and better | |
93 | utilize disk resource. | |
94 | ||
95 | Note, this is an experimental interface and could be changed someday. | |
96 | ||
87760e5e JA |
97 | config BLK_WBT |
98 | bool "Enable support for block device writeback throttling" | |
a7f7f624 | 99 | help |
87760e5e JA |
100 | Enabling this option enables the block layer to throttle buffered |
101 | background writeback from the VM, making it more smooth and having | |
102 | less impact on foreground operations. The throttling is done | |
103 | dynamically on an algorithm loosely based on CoDel, factoring in | |
104 | the realtime performance of the disk. | |
105 | ||
5f6776ba BVA |
106 | config BLK_WBT_MQ |
107 | bool "Enable writeback throttling by default" | |
108 | default y | |
109 | depends on BLK_WBT | |
110 | help | |
111 | Enable writeback throttling by default for request-based block devices. | |
112 | ||
d7067512 JB |
113 | config BLK_CGROUP_IOLATENCY |
114 | bool "Enable support for latency based cgroup IO protection" | |
115 | depends on BLK_CGROUP=y | |
a7f7f624 | 116 | help |
d7067512 JB |
117 | Enabling this option enables the .latency interface for IO throttling. |
118 | The IO controller will attempt to maintain average IO latencies below | |
119 | the configured latency target, throttling anybody with a higher latency | |
120 | target than the victimized group. | |
121 | ||
122 | Note, this is an experimental interface and could be changed someday. | |
123 | ||
d2bcbeab MK |
124 | config BLK_CGROUP_FC_APPID |
125 | bool "Enable support to track FC I/O Traffic across cgroup applications" | |
d2500a0c | 126 | depends on BLK_CGROUP && NVME_FC |
d2bcbeab MK |
127 | help |
128 | Enabling this option enables the support to track FC I/O traffic across | |
129 | cgroup applications. It enables the Fabric and the storage targets to | |
130 | identify, monitor, and handle FC traffic based on VM tags by inserting | |
131 | application specific identification into the FC frame. | |
132 | ||
7caa4715 TH |
133 | config BLK_CGROUP_IOCOST |
134 | bool "Enable support for cost model based cgroup IO controller" | |
135 | depends on BLK_CGROUP=y | |
cd006509 | 136 | select BLK_RQ_IO_DATA_LEN |
7caa4715 | 137 | select BLK_RQ_ALLOC_TIME |
a7f7f624 | 138 | help |
7caa4715 TH |
139 | Enabling this option enables the .weight interface for cost |
140 | model based proportional IO control. The IO controller | |
141 | distributes IO capacity between different groups based on | |
142 | their share of the overall weight distribution. | |
143 | ||
556910e3 BVA |
144 | config BLK_CGROUP_IOPRIO |
145 | bool "Cgroup I/O controller for assigning an I/O priority class" | |
146 | depends on BLK_CGROUP | |
147 | help | |
148 | Enable the .prio interface for assigning an I/O priority class to | |
149 | requests. The I/O priority class affects the order in which an I/O | |
150 | scheduler and block devices process requests. Only some I/O schedulers | |
151 | and some block devices support I/O priorities. | |
152 | ||
400f73b2 OS |
153 | config BLK_DEBUG_FS |
154 | bool "Block layer debugging information in debugfs" | |
155 | default y | |
156 | depends on DEBUG_FS | |
a7f7f624 | 157 | help |
400f73b2 OS |
158 | Include block layer debugging information in debugfs. This information |
159 | is mostly useful for kernel developers, but it doesn't incur any cost | |
160 | at runtime. | |
161 | ||
162 | Unless you are building a kernel for a tiny system, you should | |
163 | say Y here. | |
164 | ||
6a5ac984 BVA |
165 | config BLK_DEBUG_FS_ZONED |
166 | bool | |
167 | default BLK_DEBUG_FS && BLK_DEV_ZONED | |
168 | ||
455a7b23 SB |
169 | config BLK_SED_OPAL |
170 | bool "Logic for interfacing with Opal enabled SEDs" | |
a7f7f624 | 171 | help |
455a7b23 SB |
172 | Builds Logic for interfacing with Opal enabled controllers. |
173 | Enabling this option enables users to setup/unlock/lock | |
174 | Locking ranges for SED devices using the Opal protocol. | |
175 | ||
1b262839 ST |
176 | config BLK_INLINE_ENCRYPTION |
177 | bool "Enable inline encryption support in block layer" | |
178 | help | |
179 | Build the blk-crypto subsystem. Enabling this lets the | |
180 | block layer handle encryption, so users can take | |
181 | advantage of inline encryption hardware if present. | |
182 | ||
488f6682 ST |
183 | config BLK_INLINE_ENCRYPTION_FALLBACK |
184 | bool "Enable crypto API fallback for blk-crypto" | |
185 | depends on BLK_INLINE_ENCRYPTION | |
186 | select CRYPTO | |
187 | select CRYPTO_SKCIPHER | |
188 | help | |
189 | Enabling this lets the block layer handle inline encryption | |
190 | by falling back to the kernel crypto API when inline | |
191 | encryption hardware is not present. | |
192 | ||
9be96f3f AV |
193 | menu "Partition Types" |
194 | ||
195 | source "block/partitions/Kconfig" | |
196 | ||
197 | endmenu | |
198 | ||
2b9e0aae LT |
199 | endif # BLOCK |
200 | ||
99874d50 JA |
201 | config BLOCK_COMPAT |
202 | bool | |
2b9e0aae | 203 | depends on BLOCK && COMPAT |
99874d50 JA |
204 | default y |
205 | ||
8ec2ef2b SR |
206 | config BLK_MQ_PCI |
207 | bool | |
208 | depends on BLOCK && PCI | |
209 | default y | |
210 | ||
73473427 CH |
211 | config BLK_MQ_VIRTIO |
212 | bool | |
213 | depends on BLOCK && VIRTIO | |
214 | default y | |
215 | ||
24c5dc66 SG |
216 | config BLK_MQ_RDMA |
217 | bool | |
218 | depends on BLOCK && INFINIBAND | |
219 | default y | |
220 | ||
bca6b067 BVA |
221 | config BLK_PM |
222 | def_bool BLOCK && PM | |
223 | ||
c66fd019 CH |
224 | # do not use in new code |
225 | config BLOCK_HOLDER_DEPRECATED | |
226 | bool | |
227 | ||
8636a1f9 | 228 | source "block/Kconfig.iosched" |