1# SPDX-License-Identifier: GPL-2.0-only 2menu "SCMI Transport Drivers" 3 4config ARM_SCMI_HAVE_TRANSPORT 5 bool 6 help 7 This declares whether at least one SCMI transport has been configured. 8 Used to trigger a build bug when trying to build SCMI without any 9 configured transport. 10 11config ARM_SCMI_HAVE_SHMEM 12 bool 13 help 14 This declares whether a shared memory based transport for SCMI is 15 available. 16 17config ARM_SCMI_HAVE_MSG 18 bool 19 help 20 This declares whether a message passing based transport for SCMI is 21 available. 22 23config ARM_SCMI_TRANSPORT_MAILBOX 24 tristate "SCMI transport based on Mailbox" 25 depends on MAILBOX 26 select ARM_SCMI_HAVE_TRANSPORT 27 select ARM_SCMI_HAVE_SHMEM 28 default y 29 help 30 Enable mailbox based transport for SCMI. 31 32 If you want the ARM SCMI PROTOCOL stack to include support for a 33 transport based on mailboxes, answer Y. 34 This driver can also be built as a module. If so, the module 35 will be called scmi_transport_mailbox. 36 37config ARM_SCMI_TRANSPORT_SMC 38 tristate "SCMI transport based on SMC" 39 depends on HAVE_ARM_SMCCC_DISCOVERY 40 select ARM_SCMI_HAVE_TRANSPORT 41 select ARM_SCMI_HAVE_SHMEM 42 default y 43 help 44 Enable SMC based transport for SCMI. 45 46 If you want the ARM SCMI PROTOCOL stack to include support for a 47 transport based on SMC, answer Y. 48 This driver can also be built as a module. If so, the module 49 will be called scmi_transport_smc. 50 51config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE 52 bool "Enable atomic mode support for SCMI SMC transport" 53 depends on ARM_SCMI_TRANSPORT_SMC 54 help 55 Enable support of atomic operation for SCMI SMC based transport. 56 57 If you want the SCMI SMC based transport to operate in atomic 58 mode, avoiding any kind of sleeping behaviour for selected 59 transactions on the TX path, answer Y. 60 Enabling atomic mode operations allows any SCMI driver using this 61 transport to optionally ask for atomic SCMI transactions and operate 62 in atomic context too, at the price of using a number of busy-waiting 63 primitives all over instead. If unsure say N. 64 65config ARM_SCMI_TRANSPORT_OPTEE 66 tristate "SCMI transport based on OP-TEE service" 67 depends on OPTEE 68 select ARM_SCMI_HAVE_TRANSPORT 69 select ARM_SCMI_HAVE_SHMEM 70 select ARM_SCMI_HAVE_MSG 71 default y 72 help 73 This enables the OP-TEE service based transport for SCMI. 74 75 If you want the ARM SCMI PROTOCOL stack to include support for a 76 transport based on OP-TEE SCMI service, answer Y. 77 This driver can also be built as a module. If so, the module 78 will be called scmi_transport_optee. 79 80config ARM_SCMI_TRANSPORT_VIRTIO 81 tristate "SCMI transport based on VirtIO" 82 depends on VIRTIO 83 select ARM_SCMI_HAVE_TRANSPORT 84 select ARM_SCMI_HAVE_MSG 85 help 86 This enables the virtio based transport for SCMI. 87 88 If you want the ARM SCMI PROTOCOL stack to include support for a 89 transport based on VirtIO, answer Y. 90 This driver can also be built as a module. If so, the module 91 will be called scmi_transport_virtio. 92 93config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE 94 bool "SCMI VirtIO transport Version 1 compliance" 95 depends on ARM_SCMI_TRANSPORT_VIRTIO 96 default y 97 help 98 This enforces strict compliance with VirtIO Version 1 specification. 99 100 If you want the ARM SCMI VirtIO transport layer to refuse to work 101 with Legacy VirtIO backends and instead support only VirtIO Version 1 102 devices (or above), answer Y. 103 104 If you want instead to support also old Legacy VirtIO backends (like 105 the ones implemented by kvmtool) and let the core Kernel VirtIO layer 106 take care of the needed conversions, say N. 107 108config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE 109 bool "Enable atomic mode for SCMI VirtIO transport" 110 depends on ARM_SCMI_TRANSPORT_VIRTIO 111 help 112 Enable support of atomic operation for SCMI VirtIO based transport. 113 114 If you want the SCMI VirtIO based transport to operate in atomic 115 mode, avoiding any kind of sleeping behaviour for selected 116 transactions on the TX path, answer Y. 117 118 Enabling atomic mode operations allows any SCMI driver using this 119 transport to optionally ask for atomic SCMI transactions and operate 120 in atomic context too, at the price of using a number of busy-waiting 121 primitives all over instead. If unsure say N. 122 123endmenu 124