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 152config ARM_SCMI_POWER_CONTROL 153 tristate "SCMI system power control driver" 154 depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) 155 help 156 This enables System Power control logic which binds system shutdown or 157 reboot actions to SCMI System Power notifications generated by SCP 158 firmware. 159 160 This driver can also be built as a module. If so, the module will be 161 called scmi_power_control. Note this may needed early in boot to catch 162 early shutdown/reboot SCMI requests. 163 164endmenu 165