| FF-A manifest binding to device tree |
| ======================================== |
| |
| This document defines the nodes and properties used to define a partition, |
| according to the FF-A specification. |
| |
| Version 1.0 |
| ----------- |
| |
| Partition Properties |
| ^^^^^^^^^^^^^^^^^^^^ |
| |
| - compatible [mandatory] |
| - value type: <string> |
| - Must be the string "arm,ffa-manifest-X.Y" which specifies the major and |
| minor versions of the device tree binding for the FFA manifest represented |
| by this node. The minor number is incremented if the binding changes in a |
| backwards compatible manner. |
| |
| - X is an integer representing the major version number of this document. |
| - Y is an integer representing the minor version number of this document. |
| |
| - ffa-version [mandatory] |
| - value type: <u32> |
| - Must be two 16 bits values (X, Y), concatenated as 31:16 -> X, |
| 15:0 -> Y, where: |
| |
| - X is the major version of FF-A expected by the partition at the FFA |
| instance it will execute. |
| - Y is the minor version of FF-A expected by the partition at the FFA |
| instance it will execute. |
| |
| - uuid [mandatory] |
| - value type: <prop-encoded-array> |
| - An array consisting of 4 <u32> values, identifying the UUID of the service |
| implemented by this partition. The UUID format is described in RFC 4122. |
| |
| - id |
| - value type: <u32> |
| - Pre-allocated partition ID. |
| |
| - auxiliary-id |
| - value type: <u32> |
| - Pre-allocated ID that could be used in memory management transactions. |
| |
| - description |
| - value type: <string> |
| - Name of the partition e.g. for debugging purposes. |
| |
| - execution-ctx-count [mandatory] |
| - value type: <u32> |
| - Number of vCPUs that a VM or SP wants to instantiate. |
| |
| - In the absence of virtualization, this is the number of execution |
| contexts that a partition implements. |
| - If value of this field = 1 and number of PEs > 1 then the partition is |
| treated as UP & migrate capable. |
| - If the value of this field > 1 then the partition is treated as a MP |
| capable partition irrespective of the number of PEs. |
| |
| - exception-level [mandatory] |
| - value type: <u32> |
| - The target exception level for the partition: |
| |
| - 0x0: EL1 |
| - 0x1: S_EL0 |
| - 0x2: S_EL1 |
| |
| - execution-state [mandatory] |
| - value type: <u32> |
| - The target execution state of the partition: |
| |
| - 0: AArch64 |
| - 1: AArch32 |
| |
| - load-address |
| - value type: <u64> |
| - Physical base address of the partition in memory. Absence of this field |
| indicates that the partition is position independent and can be loaded at |
| any address chosen at boot time. |
| |
| - entrypoint-offset |
| - value type: <u64> |
| - Offset from the base of the partition's binary image to the entry point of |
| the partition. Absence of this field indicates that the entry point is at |
| offset 0x0 from the base of the partition's binary. |
| |
| - xlat-granule [mandatory] |
| - value type: <u32> |
| - Translation granule used with the partition: |
| |
| - 0x0: 4k |
| - 0x1: 16k |
| - 0x2: 64k |
| |
| - boot-order |
| - value type: <u32> |
| - A unique number amongst all partitions that specifies if this partition |
| must be booted before others. The partition with the smaller number will be |
| booted first. |
| |
| - rx-tx-buffer |
| - value type: "memory-regions" node |
| - Specific "memory-regions" nodes that describe the RX/TX buffers expected |
| by the partition. |
| The "compatible" must be the string "arm,ffa-manifest-rx_tx-buffer". |
| |
| - messaging-method [mandatory] |
| - value type: <u8> |
| - Specifies which messaging methods are supported by the partition, set bit |
| means the feature is supported, clear bit - not supported: |
| |
| - Bit[0]: partition can receive direct requests if set |
| - Bit[1]: partition can send direct requests if set |
| - Bit[2]: partition can send and receive indirect messages |
| |
| - managed-exit |
| - value type: <empty> |
| - Specifies if managed exit is supported. |
| |
| - has-primary-scheduler |
| - value type: <empty> |
| - Presence of this field indicates that the partition implements the primary |
| scheduler. If so, run-time EL must be EL1. |
| |
| - run-time-model |
| - value type: <u32> |
| - Run time model that the SPM must enforce for this SP: |
| |
| - 0x0: Run to completion |
| - 0x1: Preemptible |
| |
| - time-slice-mem |
| - value type: <empty> |
| - Presence of this field indicates that the partition doesn't expect the |
| partition manager to time slice long running memory management functions. |
| |
| - gp-register-num |
| - value type: <u32> |
| - Presence of this field indicates that the partition expects the |
| ffa_init_info structure to be passed in via the specified general purpose |
| register. |
| The field specifies the general purpose register number but not its width. |
| The width is derived from the partition's execution state, as specified in |
| the partition properties. For example, if the number value is 1 then the |
| general-purpose register used will be x1 in AArch64 state and w1 in AArch32 |
| state. |
| |
| - stream-endpoint-ids |
| - value type: <prop-encoded-array> |
| - List of <u32> tuples, identifying the IDs this partition is acting as |
| proxy for. |
| |
| - power-management-messages |
| - value type: <u32> |
| - Specifies which power management messages a partition subscribes to. |
| A set bit means the partition should be informed of the power event, clear |
| bit - should not be informed of event: |
| |
| - Bit[0]: CPU_OFF |
| - Bit[1]: CPU_SUSPEND |
| - Bit[2]: CPU_SUSPEND_RESUME |
| |
| Memory Regions |
| -------------- |
| |
| - compatible [mandatory] |
| - value type: <string> |
| - Must be the string "arm,ffa-manifest-memory-regions". |
| |
| - description |
| - value type: <string> |
| - Name of the memory region e.g. for debugging purposes. |
| |
| - pages-count [mandatory] |
| - value type: <u32> |
| - Count of pages of memory region as a multiple of the translation granule |
| size |
| |
| - attributes [mandatory] |
| - value type: <u32> |
| - Mapping modes: ORed to get required permission |
| |
| - 0x1: Read |
| - 0x2: Write |
| - 0x4: Execute |
| |
| - base-address |
| - value type: <u64> |
| - Base address of the region. The address must be aligned to the translation |
| granule size. |
| The address given may be a Physical Address (PA), Virtual Address (VA), or |
| Intermediate Physical Address (IPA). Refer to the FFA specification for |
| more information on the restrictions around the address type. |
| If the base address is omitted then the partition manager must map a memory |
| region of the specified size into the partition's translation regime and |
| then communicate the region properties (including the base address chosen |
| by the partition manager) to the partition. |
| |
| Device Regions |
| -------------- |
| |
| - compatible [mandatory] |
| - value type: <string> |
| - Must be the string "arm,ffa-manifest-device-regions". |
| |
| - description |
| - value type: <string> |
| - Name of the device region e.g. for debugging purposes. |
| |
| - reg [mandatory] |
| - value type: <prop-encoded-array> |
| - A (address, num-pages) pair describing the device, where: |
| |
| - address: The physical base address <u64> value of the device MMIO |
| region. |
| - num-pages: The <u32> number of pages of the region. The total size of |
| the region is this value multiplied by the translation granule size. |
| |
| - attributes [mandatory] |
| - value type: <u32> |
| - Mapping modes: ORed to get required permission |
| |
| - 0x1: Read |
| - 0x2: Write |
| - 0x4: Execute |
| |
| - smmu-id |
| - value type: <u32> |
| - On systems with multiple System Memory Management Units (SMMUs) this |
| identifier is used to inform the partition manager which SMMU the device is |
| upstream of. If the field is omitted then it is assumed that the device is |
| not upstream of any SMMU. |
| |
| - stream-ids |
| - value type: <prop-encoded-array> |
| - A list of (id, mem-manage) pair, where: |
| |
| - id: A unique <u32> value amongst all devices assigned to the partition. |
| |
| - interrupts [mandatory] |
| - value type: <prop-encoded-array> |
| - A list of (id, attributes) pair describing the device interrupts, where: |
| |
| - id: The <u32> interrupt IDs. |
| - attributes: A <u32> value, |
| containing the attributes for each interrupt ID: |
| |
| - Interrupt type: SPI, PPI, SGI |
| - Interrupt configuration: Edge triggered, Level triggered |
| - Interrupt security state: Secure, Non-secure |
| - Interrupt priority value |
| - Target execution context/vCPU for each SPI |
| |
| - exclusive-access |
| - value type: <empty> |
| - Presence of this field implies that this endpoint must be granted exclusive |
| access and ownership of this device's MMIO region. |
| |
| -------------- |
| |
| *Copyright (c) 2019-2021, Arm Limited and Contributors. All rights reserved.* |