1# SPDX-License-Identifier: GPL-2.0-only
2menu "ARM System Control and Management Interface Protocol"
3
4config ARM_SCMI_PROTOCOL
5	tristate "ARM System Control and Management Interface (SCMI) Message Protocol"
6	depends on ARM || ARM64 || COMPILE_TEST
7	help
8	  ARM System Control and Management Interface (SCMI) protocol is a
9	  set of operating system-independent software interfaces that are
10	  used in system management. SCMI is extensible and currently provides
11	  interfaces for: Discovery and self-description of the interfaces
12	  it supports, Power domain management which is the ability to place
13	  a given device or domain into the various power-saving states that
14	  it supports, Performance management which is the ability to control
15	  the performance of a domain that is composed of compute engines
16	  such as application processors and other accelerators, Clock
17	  management which is the ability to set and inquire rates on platform
18	  managed clocks and Sensor management which is the ability to read
19	  sensor data, and be notified of sensor value.
20
21	  This protocol library provides interface for all the client drivers
22	  making use of the features offered by the SCMI.
23
24if ARM_SCMI_PROTOCOL
25
26config ARM_SCMI_HAVE_TRANSPORT
27	bool
28	help
29	  This declares whether at least one SCMI transport has been configured.
30	  Used to trigger a build bug when trying to build SCMI without any
31	  configured transport.
32
33config ARM_SCMI_HAVE_SHMEM
34	bool
35	help
36	  This declares whether a shared memory based transport for SCMI is
37	  available.
38
39config ARM_SCMI_HAVE_MSG
40	bool
41	help
42	  This declares whether a message passing based transport for SCMI is
43	  available.
44
45config ARM_SCMI_TRANSPORT_MAILBOX
46	bool "SCMI transport based on Mailbox"
47	depends on MAILBOX
48	select ARM_SCMI_HAVE_TRANSPORT
49	select ARM_SCMI_HAVE_SHMEM
50	default y
51	help
52	  Enable mailbox based transport for SCMI.
53
54	  If you want the ARM SCMI PROTOCOL stack to include support for a
55	  transport based on mailboxes, answer Y.
56
57config ARM_SCMI_TRANSPORT_OPTEE
58	bool "SCMI transport based on OP-TEE service"
59	depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL
60	select ARM_SCMI_HAVE_TRANSPORT
61	select ARM_SCMI_HAVE_SHMEM
62	select ARM_SCMI_HAVE_MSG
63	default y
64	help
65	  This enables the OP-TEE service based transport for SCMI.
66
67	  If you want the ARM SCMI PROTOCOL stack to include support for a
68	  transport based on OP-TEE SCMI service, answer Y.
69
70config ARM_SCMI_TRANSPORT_SMC
71	bool "SCMI transport based on SMC"
72	depends on HAVE_ARM_SMCCC_DISCOVERY
73	select ARM_SCMI_HAVE_TRANSPORT
74	select ARM_SCMI_HAVE_SHMEM
75	default y
76	help
77	  Enable SMC based transport for SCMI.
78
79	  If you want the ARM SCMI PROTOCOL stack to include support for a
80	  transport based on SMC, answer Y.
81
82config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE
83	bool "Enable atomic mode support for SCMI SMC transport"
84	depends on ARM_SCMI_TRANSPORT_SMC
85	help
86	  Enable support of atomic operation for SCMI SMC based transport.
87
88	  If you want the SCMI SMC based transport to operate in atomic
89	  mode, avoiding any kind of sleeping behaviour for selected
90	  transactions on the TX path, answer Y.
91	  Enabling atomic mode operations allows any SCMI driver using this
92	  transport to optionally ask for atomic SCMI transactions and operate
93	  in atomic context too, at the price of using a number of busy-waiting
94	  primitives all over instead. If unsure say N.
95
96config ARM_SCMI_TRANSPORT_VIRTIO
97	bool "SCMI transport based on VirtIO"
98	depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
99	select ARM_SCMI_HAVE_TRANSPORT
100	select ARM_SCMI_HAVE_MSG
101	help
102	  This enables the virtio based transport for SCMI.
103
104	  If you want the ARM SCMI PROTOCOL stack to include support for a
105	  transport based on VirtIO, answer Y.
106
107config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE
108	bool "SCMI VirtIO transport Version 1 compliance"
109	depends on ARM_SCMI_TRANSPORT_VIRTIO
110	default y
111	help
112	  This enforces strict compliance with VirtIO Version 1 specification.
113
114	  If you want the ARM SCMI VirtIO transport layer to refuse to work
115	  with Legacy VirtIO backends and instead support only VirtIO Version 1
116	  devices (or above), answer Y.
117
118	  If you want instead to support also old Legacy VirtIO backends (like
119	  the ones implemented by kvmtool) and let the core Kernel VirtIO layer
120	  take care of the needed conversions, say N.
121
122config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE
123	bool "Enable atomic mode for SCMI VirtIO transport"
124	depends on ARM_SCMI_TRANSPORT_VIRTIO
125	help
126	  Enable support of atomic operation for SCMI VirtIO based transport.
127
128	  If you want the SCMI VirtIO based transport to operate in atomic
129	  mode, avoiding any kind of sleeping behaviour for selected
130	  transactions on the TX path, answer Y.
131
132	  Enabling atomic mode operations allows any SCMI driver using this
133	  transport to optionally ask for atomic SCMI transactions and operate
134	  in atomic context too, at the price of using a number of busy-waiting
135	  primitives all over instead. If unsure say N.
136
137endif #ARM_SCMI_PROTOCOL
138
139config ARM_SCMI_POWER_DOMAIN
140	tristate "SCMI power domain driver"
141	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
142	default y
143	select PM_GENERIC_DOMAINS if PM
144	help
145	  This enables support for the SCMI power domains which can be
146	  enabled or disabled via the SCP firmware
147
148	  This driver can also be built as a module.  If so, the module
149	  will be called scmi_pm_domain. Note this may needed early in boot
150	  before rootfs may be available.
151
152endmenu
153