152 lines
5.3 KiB
Plaintext
152 lines
5.3 KiB
Plaintext
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# SPDX-License-Identifier: GPL-2.0-only
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menu "ARM System Control and Management Interface Protocol"
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config ARM_SCMI_PROTOCOL
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tristate "ARM System Control and Management Interface (SCMI) Message Protocol"
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depends on ARM || ARM64 || COMPILE_TEST
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help
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ARM System Control and Management Interface (SCMI) protocol is a
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set of operating system-independent software interfaces that are
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used in system management. SCMI is extensible and currently provides
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interfaces for: Discovery and self-description of the interfaces
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it supports, Power domain management which is the ability to place
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a given device or domain into the various power-saving states that
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it supports, Performance management which is the ability to control
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the performance of a domain that is composed of compute engines
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such as application processors and other accelerators, Clock
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management which is the ability to set and inquire rates on platform
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managed clocks and Sensor management which is the ability to read
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sensor data, and be notified of sensor value.
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This protocol library provides interface for all the client drivers
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making use of the features offered by the SCMI.
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if ARM_SCMI_PROTOCOL
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config ARM_SCMI_HAVE_TRANSPORT
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bool
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help
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This declares whether at least one SCMI transport has been configured.
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Used to trigger a build bug when trying to build SCMI without any
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configured transport.
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config ARM_SCMI_HAVE_SHMEM
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bool
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help
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This declares whether a shared memory based transport for SCMI is
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available.
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config ARM_SCMI_HAVE_MSG
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bool
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help
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This declares whether a message passing based transport for SCMI is
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available.
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config ARM_SCMI_TRANSPORT_MAILBOX
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bool "SCMI transport based on Mailbox"
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depends on MAILBOX
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select ARM_SCMI_HAVE_TRANSPORT
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select ARM_SCMI_HAVE_SHMEM
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default y
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help
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Enable mailbox based transport for SCMI.
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If you want the ARM SCMI PROTOCOL stack to include support for a
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transport based on mailboxes, answer Y.
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config ARM_SCMI_TRANSPORT_OPTEE
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bool "SCMI transport based on OP-TEE service"
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depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL
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select ARM_SCMI_HAVE_TRANSPORT
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select ARM_SCMI_HAVE_SHMEM
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default y
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help
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This enables the OP-TEE service based transport for SCMI.
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If you want the ARM SCMI PROTOCOL stack to include support for a
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transport based on OP-TEE SCMI service, answer Y.
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config ARM_SCMI_TRANSPORT_SMC
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bool "SCMI transport based on SMC"
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depends on HAVE_ARM_SMCCC_DISCOVERY
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select ARM_SCMI_HAVE_TRANSPORT
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select ARM_SCMI_HAVE_SHMEM
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default y
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help
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Enable SMC based transport for SCMI.
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If you want the ARM SCMI PROTOCOL stack to include support for a
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transport based on SMC, answer Y.
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config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE
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bool "Enable atomic mode support for SCMI SMC transport"
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depends on ARM_SCMI_TRANSPORT_SMC
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help
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Enable support of atomic operation for SCMI SMC based transport.
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If you want the SCMI SMC based transport to operate in atomic
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mode, avoiding any kind of sleeping behaviour for selected
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transactions on the TX path, answer Y.
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Enabling atomic mode operations allows any SCMI driver using this
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transport to optionally ask for atomic SCMI transactions and operate
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in atomic context too, at the price of using a number of busy-waiting
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primitives all over instead. If unsure say N.
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config ARM_SCMI_TRANSPORT_VIRTIO
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bool "SCMI transport based on VirtIO"
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depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
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select ARM_SCMI_HAVE_TRANSPORT
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select ARM_SCMI_HAVE_MSG
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help
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This enables the virtio based transport for SCMI.
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If you want the ARM SCMI PROTOCOL stack to include support for a
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transport based on VirtIO, answer Y.
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config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE
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bool "SCMI VirtIO transport Version 1 compliance"
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depends on ARM_SCMI_TRANSPORT_VIRTIO
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default y
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help
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This enforces strict compliance with VirtIO Version 1 specification.
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If you want the ARM SCMI VirtIO transport layer to refuse to work
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with Legacy VirtIO backends and instead support only VirtIO Version 1
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devices (or above), answer Y.
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If you want instead to support also old Legacy VirtIO backends (like
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the ones implemented by kvmtool) and let the core Kernel VirtIO layer
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take care of the needed conversions, say N.
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config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE
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bool "Enable atomic mode for SCMI VirtIO transport"
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depends on ARM_SCMI_TRANSPORT_VIRTIO
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help
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Enable support of atomic operation for SCMI VirtIO based transport.
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If you want the SCMI VirtIO based transport to operate in atomic
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mode, avoiding any kind of sleeping behaviour for selected
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transactions on the TX path, answer Y.
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Enabling atomic mode operations allows any SCMI driver using this
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transport to optionally ask for atomic SCMI transactions and operate
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in atomic context too, at the price of using a number of busy-waiting
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primitives all over instead. If unsure say N.
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endif #ARM_SCMI_PROTOCOL
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config ARM_SCMI_POWER_DOMAIN
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tristate "SCMI power domain driver"
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depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
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default y
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select PM_GENERIC_DOMAINS if PM
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help
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This enables support for the SCMI power domains which can be
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enabled or disabled via the SCP firmware
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This driver can also be built as a module. If so, the module
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will be called scmi_pm_domain. Note this may needed early in boot
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before rootfs may be available.
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endmenu
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