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review.trustedfirmware.org / rust-spmc / arm-ffa / 5cc04d675eaa3f70898e65f2df492699c1ac2396 / . / src / lib.rs
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// SPDX-FileCopyrightText: Copyright 2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
// SPDX-License-Identifier: MIT OR Apache-2.0
#![cfg_attr(not(test), no_std)]
#![deny(clippy::undocumented_unsafe_blocks)]
#![deny(unsafe_op_in_unsafe_fn)]
#![doc = include_str!("../README.md")]
use core::fmt::{self, Debug, Display, Formatter};
use num_enum::{IntoPrimitive, TryFromPrimitive};
use thiserror::Error;
pub use uuid::Uuid;
use zerocopy::{transmute, FromBytes, Immutable, IntoBytes};
pub mod boot_info;
mod ffa_v1_1;
mod ffa_v1_2;
pub mod memory_management;
pub mod partition_info;
/// Constant for 4K page size. On many occasions the FF-A spec defines memory size as count of 4K
/// pages, regardless of the current translation granule.
pub const FFA_PAGE_SIZE_4K: usize = 4096;
/// Rich error types returned by this module. Should be converted to [`crate::FfaError`] when used
/// with the `FFA_ERROR` interface.
#[derive(Debug, Error, PartialEq)]
pub enum Error {
#[error("Unrecognised FF-A function ID {0}")]
UnrecognisedFunctionId(u32),
#[error("Unrecognised FF-A feature ID {0}")]
UnrecognisedFeatureId(u8),
#[error("Unrecognised FF-A error code {0}")]
UnrecognisedErrorCode(i32),
#[error("Unrecognised FF-A Framework Message {0}")]
UnrecognisedFwkMsg(u32),
#[error("Invalid FF-A Msg Wait Flag {0}")]
InvalidMsgWaitFlag(u32),
#[error("Invalid FF-A Msg Send2 Flag {0}")]
InvalidMsgSend2Flag(u32),
#[error("Unrecognised VM availability status {0}")]
UnrecognisedVmAvailabilityStatus(i32),
#[error("Unrecognised FF-A Warm Boot Type {0}")]
UnrecognisedWarmBootType(u32),
#[error("Invalid version {0}")]
InvalidVersion(u32),
#[error("Invalid Information Tag {0}")]
InvalidInformationTag(u16),
#[error("Invalid Flag for Notification Set")]
InvalidNotificationSetFlag(u32),
#[error("Invalid Vm ID")]
InvalidVmId(u32),
#[error("Invalid FF-A Partition Info Get Flag {0}")]
InvalidPartitionInfoGetFlag(u32),
#[error("Invalid success argument variant")]
InvalidSuccessArgsVariant,
#[error("Invalid notification count")]
InvalidNotificationCount,
#[error("Invalid Partition Info Get Regs response")]
InvalidPartitionInfoGetRegsResponse,
#[error("Invalid FF-A version {0} for function ID {1:?}")]
InvalidVersionForFunctionId(Version, FuncId),
#[error("Invalid character count {0}")]
InvalidCharacterCount(u8),
#[error("Invalid memory reclaim flags {0}")]
InvalidMemReclaimFlags(u32),
#[error("Memory management error")]
MemoryManagementError(#[from] memory_management::Error),
}
impl From<Error> for FfaError {
fn from(value: Error) -> Self {
match value {
Error::UnrecognisedFunctionId(_)
| Error::UnrecognisedFeatureId(_)
| Error::InvalidVersionForFunctionId(..) => Self::NotSupported,
Error::InvalidInformationTag(_) => Self::Retry,
Error::UnrecognisedErrorCode(_)
| Error::UnrecognisedFwkMsg(_)
| Error::InvalidVersion(_)
| Error::InvalidMsgWaitFlag(_)
| Error::InvalidMsgSend2Flag(_)
| Error::UnrecognisedVmAvailabilityStatus(_)
| Error::InvalidNotificationSetFlag(_)
| Error::InvalidVmId(_)
| Error::UnrecognisedWarmBootType(_)
| Error::InvalidPartitionInfoGetFlag(_)
| Error::InvalidSuccessArgsVariant
| Error::InvalidNotificationCount
| Error::InvalidPartitionInfoGetRegsResponse
| Error::InvalidCharacterCount(_)
| Error::InvalidMemReclaimFlags(_)
| Error::MemoryManagementError(_) => Self::InvalidParameters,
}
}
}
/// An FF-A instance is a valid combination of two FF-A components at an exception level boundary.
#[derive(PartialEq, Clone, Copy)]
pub enum Instance {
/// The instance between the SPMC and SPMD.
SecurePhysical,
/// The instance between the SPMC and a physical SP (contains the SP's endpoint ID).
SecureVirtual(u16),
}
/// Function IDs of the various FF-A interfaces.
#[derive(Clone, Copy, Debug, Eq, IntoPrimitive, PartialEq, TryFromPrimitive)]
#[num_enum(error_type(name = Error, constructor = Error::UnrecognisedFunctionId))]
#[repr(u32)]
pub enum FuncId {
Error = 0x84000060,
Success32 = 0x84000061,
Success64 = 0xc4000061,
Interrupt = 0x84000062,
Version = 0x84000063,
Features = 0x84000064,
RxAcquire = 0x84000084,
RxRelease = 0x84000065,
RxTxMap32 = 0x84000066,
RxTxMap64 = 0xc4000066,
RxTxUnmap = 0x84000067,
PartitionInfoGet = 0x84000068,
PartitionInfoGetRegs = 0xc400008b,
IdGet = 0x84000069,
SpmIdGet = 0x84000085,
ConsoleLog32 = 0x8400008a,
ConsoleLog64 = 0xc400008a,
MsgWait = 0x8400006b,
Yield = 0x8400006c,
Run = 0x8400006d,
NormalWorldResume = 0x8400007c,
MsgSend2 = 0x84000086,
MsgSendDirectReq32 = 0x8400006f,
MsgSendDirectReq64 = 0xc400006f,
MsgSendDirectReq64_2 = 0xc400008d,
MsgSendDirectResp32 = 0x84000070,
MsgSendDirectResp64 = 0xc4000070,
MsgSendDirectResp64_2 = 0xc400008e,
NotificationBitmapCreate = 0x8400007d,
NotificationBitmapDestroy = 0x8400007e,
NotificationBind = 0x8400007f,
NotificationUnbind = 0x84000080,
NotificationSet = 0x84000081,
NotificationGet = 0x84000082,
NotificationInfoGet32 = 0x84000083,
NotificationInfoGet64 = 0xc4000083,
El3IntrHandle = 0x8400008c,
SecondaryEpRegister32 = 0x84000087,
SecondaryEpRegister64 = 0xc4000087,
MemDonate32 = 0x84000071,
MemDonate64 = 0xc4000071,
MemLend32 = 0x84000072,
MemLend64 = 0xc4000072,
MemShare32 = 0x84000073,
MemShare64 = 0xc4000073,
MemRetrieveReq32 = 0x84000074,
MemRetrieveReq64 = 0xc4000074,
MemRetrieveResp = 0x84000075,
MemRelinquish = 0x84000076,
MemReclaim = 0x84000077,
MemPermGet32 = 0x84000088,
MemPermGet64 = 0xc4000088,
MemPermSet32 = 0x84000089,
MemPermSet64 = 0xc4000089,
}
impl FuncId {
/// Returns true if this is a 32-bit call, or false if it is a 64-bit call.
pub fn is_32bit(&self) -> bool {
u32::from(*self) & (1 << 30) == 0
}
/// Returns the FF-A version that has introduced the function ID.
pub fn minimum_ffa_version(&self) -> Version {
match self {
FuncId::Error
| FuncId::Success32
| FuncId::Success64
| FuncId::Interrupt
| FuncId::Version
| FuncId::Features
| FuncId::RxRelease
| FuncId::RxTxMap32
| FuncId::RxTxMap64
| FuncId::RxTxUnmap
| FuncId::PartitionInfoGet
| FuncId::IdGet
| FuncId::MsgWait
| FuncId::Yield
| FuncId::Run
| FuncId::NormalWorldResume
| FuncId::MsgSendDirectReq32
| FuncId::MsgSendDirectReq64
| FuncId::MsgSendDirectResp32
| FuncId::MsgSendDirectResp64
| FuncId::MemDonate32
| FuncId::MemDonate64
| FuncId::MemLend32
| FuncId::MemLend64
| FuncId::MemShare32
| FuncId::MemShare64
| FuncId::MemRetrieveReq32
| FuncId::MemRetrieveReq64
| FuncId::MemRetrieveResp
| FuncId::MemRelinquish
| FuncId::MemReclaim => Version(1, 0),
FuncId::RxAcquire
| FuncId::SpmIdGet
| FuncId::MsgSend2
| FuncId::MemPermGet32
| FuncId::MemPermGet64
| FuncId::MemPermSet32
| FuncId::MemPermSet64
| FuncId::NotificationBitmapCreate
| FuncId::NotificationBitmapDestroy
| FuncId::NotificationBind
| FuncId::NotificationUnbind
| FuncId::NotificationSet
| FuncId::NotificationGet
| FuncId::NotificationInfoGet32
| FuncId::NotificationInfoGet64
| FuncId::SecondaryEpRegister32
| FuncId::SecondaryEpRegister64 => Version(1, 1),
FuncId::PartitionInfoGetRegs
| FuncId::ConsoleLog32
| FuncId::ConsoleLog64
| FuncId::MsgSendDirectReq64_2
| FuncId::MsgSendDirectResp64_2
| FuncId::El3IntrHandle => Version(1, 2),
}
}
}
/// Error status codes used by the `FFA_ERROR` interface.
#[derive(Clone, Copy, Debug, Eq, Error, IntoPrimitive, PartialEq, TryFromPrimitive)]
#[num_enum(error_type(name = Error, constructor = Error::UnrecognisedErrorCode))]
#[repr(i32)]
pub enum FfaError {
#[error("Not supported")]
NotSupported = -1,
#[error("Invalid parameters")]
InvalidParameters = -2,
#[error("No memory")]
NoMemory = -3,
#[error("Busy")]
Busy = -4,
#[error("Interrupted")]
Interrupted = -5,
#[error("Denied")]
Denied = -6,
#[error("Retry")]
Retry = -7,
#[error("Aborted")]
Aborted = -8,
#[error("No data")]
NoData = -9,
}
/// Endpoint ID and vCPU ID pair, used by `FFA_ERROR`, `FFA_INTERRUPT` and `FFA_RUN` interfaces.
#[derive(Debug, Default, Eq, PartialEq, Clone, Copy)]
pub struct TargetInfo {
pub endpoint_id: u16,
pub vcpu_id: u16,
}
impl From<u32> for TargetInfo {
fn from(value: u32) -> Self {
Self {
endpoint_id: (value >> 16) as u16,
vcpu_id: value as u16,
}
}
}
impl From<TargetInfo> for u32 {
fn from(value: TargetInfo) -> Self {
((value.endpoint_id as u32) << 16) | value.vcpu_id as u32
}
}
/// Generic arguments of the `FFA_SUCCESS` interface. The interpretation of the arguments depends on
/// the interface that initiated the request. The application code has knowledge of the request, so
/// it has to convert `SuccessArgs` into/from a specific success args structure that matches the
/// request.
///
/// The current specialized success arguments types are:
/// * `FFA_FEATURES` - [`SuccessArgsFeatures`]
/// * `FFA_ID_GET` - [`SuccessArgsIdGet`]
/// * `FFA_SPM_ID_GET` - [`SuccessArgsSpmIdGet`]
/// * `FFA_PARTITION_INFO_GET` - [`partition_info::SuccessArgsPartitionInfoGet`]
/// * `FFA_PARTITION_INFO_GET_REGS` - [`partition_info::SuccessArgsPartitionInfoGetRegs`]
/// * `FFA_NOTIFICATION_GET` - [`SuccessArgsNotificationGet`]
/// * `FFA_NOTIFICATION_INFO_GET_32` - [`SuccessArgsNotificationInfoGet32`]
/// * `FFA_NOTIFICATION_INFO_GET_64` - [`SuccessArgsNotificationInfoGet64`]
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum SuccessArgs {
Args32([u32; 6]),
Args64([u64; 6]),
Args64_2([u64; 16]),
}
impl SuccessArgs {
fn try_get_args32(self) -> Result<[u32; 6], Error> {
match self {
SuccessArgs::Args32(args) => Ok(args),
SuccessArgs::Args64(_) | SuccessArgs::Args64_2(_) => {
Err(Error::InvalidSuccessArgsVariant)
}
}
}
fn try_get_args64(self) -> Result<[u64; 6], Error> {
match self {
SuccessArgs::Args64(args) => Ok(args),
SuccessArgs::Args32(_) | SuccessArgs::Args64_2(_) => {
Err(Error::InvalidSuccessArgsVariant)
}
}
}
fn try_get_args64_2(self) -> Result<[u64; 16], Error> {
match self {
SuccessArgs::Args64_2(args) => Ok(args),
SuccessArgs::Args32(_) | SuccessArgs::Args64(_) => {
Err(Error::InvalidSuccessArgsVariant)
}
}
}
}
/// Entrypoint address argument for `FFA_SECONDARY_EP_REGISTER` interface.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum SecondaryEpRegisterAddr {
Addr32(u32),
Addr64(u64),
}
/// Version number of the FF-A implementation, `.0` is the major, `.1` is minor the version.
#[derive(Clone, Copy, Eq, PartialEq, PartialOrd, Ord)]
pub struct Version(pub u16, pub u16);
impl Version {
// The FF-A spec mandates that bit[31] of a version number must be 0
const MBZ_BITS: u32 = 1 << 31;
/// Returns whether the caller's version (self) is compatible with the callee's version (input
/// parameter)
pub fn is_compatible_to(&self, callee_version: &Version) -> bool {
self.0 == callee_version.0 && self.1 <= callee_version.1
}
/// Returns true if the specified FF-A version uses 18 registers for calls, false if it uses 8.
pub fn needs_18_regs(&self) -> bool {
*self >= Version(1, 2)
}
}
impl TryFrom<u32> for Version {
type Error = Error;
fn try_from(val: u32) -> Result<Self, Self::Error> {
if (val & Self::MBZ_BITS) != 0 {
Err(Error::InvalidVersion(val))
} else {
Ok(Self((val >> 16) as u16, val as u16))
}
}
}
impl From<Version> for u32 {
fn from(v: Version) -> Self {
let v_u32 = ((v.0 as u32) << 16) | v.1 as u32;
assert!(v_u32 & Version::MBZ_BITS == 0);
v_u32
}
}
impl Display for Version {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{}.{}", self.0, self.1)
}
}
impl Debug for Version {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
Display::fmt(self, f)
}
}
/// Feature IDs used by the `FFA_FEATURES` interface.
#[derive(Clone, Copy, Debug, Eq, IntoPrimitive, PartialEq, TryFromPrimitive)]
#[num_enum(error_type(name = Error, constructor = Error::UnrecognisedFeatureId))]
#[repr(u8)]
pub enum FeatureId {
NotificationPendingInterrupt = 0x1,
ScheduleReceiverInterrupt = 0x2,
ManagedExitInterrupt = 0x3,
}
/// Arguments for the `FFA_FEATURES` interface.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum Feature {
FuncId(FuncId),
FeatureId(FeatureId),
Unknown(u32),
}
impl From<u32> for Feature {
fn from(value: u32) -> Self {
// Bit[31] is set for all valid FF-A function IDs so we don't have to check it separately
if let Ok(func_id) = value.try_into() {
Self::FuncId(func_id)
} else if let Ok(feat_id) = (value as u8).try_into() {
Self::FeatureId(feat_id)
} else {
Self::Unknown(value)
}
}
}
impl From<Feature> for u32 {
fn from(value: Feature) -> Self {
match value {
Feature::FuncId(func_id) => (1 << 31) | func_id as u32,
Feature::FeatureId(feature_id) => feature_id as u32,
Feature::Unknown(id) => id,
}
}
}
/// `FFA_FEATURES` specific success argument structure. This type needs further specialization based
/// on 'FF-A function ID or Feature ID' field of the preceeding `FFA_FEATURES` request.
#[derive(Debug, Eq, Default, PartialEq, Clone, Copy)]
pub struct SuccessArgsFeatures {
pub properties: [u32; 2],
}
impl From<SuccessArgsFeatures> for SuccessArgs {
fn from(value: SuccessArgsFeatures) -> Self {
Self::Args32([value.properties[0], value.properties[1], 0, 0, 0, 0])
}
}
impl TryFrom<SuccessArgs> for SuccessArgsFeatures {
type Error = Error;
fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
let args = value.try_get_args32()?;
Ok(Self {
properties: [args[0], args[1]],
})
}
}
/// RXTX buffer descriptor, used by `FFA_RXTX_MAP`.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum RxTxAddr {
Addr32 { rx: u32, tx: u32 },
Addr64 { rx: u64, tx: u64 },
}
/// `FFA_ID_GET` specific success argument structure.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct SuccessArgsIdGet {
pub id: u16,
}
impl From<SuccessArgsIdGet> for SuccessArgs {
fn from(value: SuccessArgsIdGet) -> Self {
SuccessArgs::Args32([value.id as u32, 0, 0, 0, 0, 0])
}
}
impl TryFrom<SuccessArgs> for SuccessArgsIdGet {
type Error = Error;
fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
let args = value.try_get_args32()?;
Ok(Self { id: args[0] as u16 })
}
}
/// `FFA_SPM_ID_GET` specific success argument structure.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct SuccessArgsSpmIdGet {
pub id: u16,
}
impl From<SuccessArgsSpmIdGet> for SuccessArgs {
fn from(value: SuccessArgsSpmIdGet) -> Self {
SuccessArgs::Args32([value.id as u32, 0, 0, 0, 0, 0])
}
}
impl TryFrom<SuccessArgs> for SuccessArgsSpmIdGet {
type Error = Error;
fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
let args = value.try_get_args32()?;
Ok(Self { id: args[0] as u16 })
}
}
/// Flags of the `FFA_PARTITION_INFO_GET` interface.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct PartitionInfoGetFlags {
pub count_only: bool,
}
impl PartitionInfoGetFlags {
const RETURN_INFORMATION_TYPE_FLAG: u32 = 1 << 0;
const MBZ_BITS: u32 = 0xffff_fffe;
}
impl TryFrom<u32> for PartitionInfoGetFlags {
type Error = Error;
fn try_from(val: u32) -> Result<Self, Self::Error> {
if (val & Self::MBZ_BITS) != 0 {
Err(Error::InvalidPartitionInfoGetFlag(val))
} else {
Ok(Self {
count_only: val & Self::RETURN_INFORMATION_TYPE_FLAG != 0,
})
}
}
}
impl From<PartitionInfoGetFlags> for u32 {
fn from(flags: PartitionInfoGetFlags) -> Self {
let mut bits: u32 = 0;
if flags.count_only {
bits |= PartitionInfoGetFlags::RETURN_INFORMATION_TYPE_FLAG;
}
bits
}
}
/// Flags field of the FFA_MSG_SEND2 interface.
#[derive(Debug, Eq, Default, PartialEq, Clone, Copy)]
pub struct MsgSend2Flags {
pub delay_schedule_receiver: bool,
}
impl MsgSend2Flags {
const DELAY_SCHEDULE_RECEIVER: u32 = 1 << 1;
const MBZ_BITS: u32 = 0xffff_fffd;
}
impl TryFrom<u32> for MsgSend2Flags {
type Error = Error;
fn try_from(val: u32) -> Result<Self, Self::Error> {
if (val & Self::MBZ_BITS) != 0 {
Err(Error::InvalidMsgSend2Flag(val))
} else {
Ok(MsgSend2Flags {
delay_schedule_receiver: val & Self::DELAY_SCHEDULE_RECEIVER != 0,
})
}
}
}
impl From<MsgSend2Flags> for u32 {
fn from(flags: MsgSend2Flags) -> Self {
let mut bits: u32 = 0;
if flags.delay_schedule_receiver {
bits |= MsgSend2Flags::DELAY_SCHEDULE_RECEIVER;
}
bits
}
}
/// Composite type for capturing success and error return codes for the VM availability messages.
///
/// Error codes are handled by the `FfaError` type. Having a separate type for errors helps using
/// `Result<(), FfaError>`. If a single type would include both success and error values,
/// then `Err(FfaError::Success)` would be incomprehensible.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum VmAvailabilityStatus {
Success,
Error(FfaError),
}
impl TryFrom<i32> for VmAvailabilityStatus {
type Error = Error;
fn try_from(value: i32) -> Result<Self, <Self as TryFrom<i32>>::Error> {
Ok(match value {
0 => Self::Success,
error_code => Self::Error(FfaError::try_from(error_code)?),
})
}
}
impl From<VmAvailabilityStatus> for i32 {
fn from(value: VmAvailabilityStatus) -> Self {
match value {
VmAvailabilityStatus::Success => 0,
VmAvailabilityStatus::Error(error_code) => error_code.into(),
}
}
}
/// Arguments for the Power Warm Boot `FFA_MSG_SEND_DIRECT_REQ` interface.
#[derive(Clone, Copy, Debug, Eq, IntoPrimitive, PartialEq, TryFromPrimitive)]
#[num_enum(error_type(name = Error, constructor = Error::UnrecognisedWarmBootType))]
#[repr(u32)]
pub enum WarmBootType {
ExitFromSuspend = 0,
ExitFromLowPower = 1,
}
/// Arguments for the `FFA_MSG_SEND_DIRECT_{REQ,RESP}` interfaces.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum DirectMsgArgs {
Args32([u32; 5]),
Args64([u64; 5]),
/// Message for forwarding FFA_VERSION call from Normal world to the SPMC
VersionReq {
version: Version,
},
/// Response message to forwarded FFA_VERSION call from the Normal world
/// Contains the version returned by the SPMC or None
VersionResp {
version: Option<Version>,
},
/// Message for a power management operation initiated by a PSCI function
PowerPsciReq32 {
// params[i]: Input parameter in w[i] in PSCI function invocation at EL3.
// params[0]: Function ID.
params: [u32; 4],
},
/// Message for a power management operation initiated by a PSCI function
PowerPsciReq64 {
// params[i]: Input parameter in x[i] in PSCI function invocation at EL3.
// params[0]: Function ID.
params: [u64; 4],
},
/// Message for a warm boot
PowerWarmBootReq {
boot_type: WarmBootType,
},
/// Response message to indicate return status of the last power management request message
/// Return error code SUCCESS or DENIED as defined in PSCI spec. Caller is left to do the
/// parsing of the return status.
PowerPsciResp {
psci_status: i32,
},
/// Message to signal creation of a VM
VmCreated {
// Globally unique Handle to identify a memory region that contains IMPLEMENTATION DEFINED
// information associated with the created VM.
// The invalid memory region handle must be specified by the Hypervisor if this field is not
// used.
handle: memory_management::Handle,
vm_id: u16,
},
/// Message to acknowledge creation of a VM
VmCreatedAck {
sp_status: VmAvailabilityStatus,
},
/// Message to signal destruction of a VM
VmDestructed {
// Globally unique Handle to identify a memory region that contains IMPLEMENTATION DEFINED
// information associated with the created VM.
// The invalid memory region handle must be specified by the Hypervisor if this field is not
// used.
handle: memory_management::Handle,
vm_id: u16,
},
/// Message to acknowledge destruction of a VM
VmDestructedAck {
sp_status: VmAvailabilityStatus,
},
}
impl DirectMsgArgs {
// Flags for the `FFA_MSG_SEND_DIRECT_{REQ,RESP}` interfaces.
const FWK_MSG_BITS: u32 = 1 << 31;
const VERSION_REQ: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b1000;
const VERSION_RESP: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b1001;
const POWER_PSCI_REQ: u32 = DirectMsgArgs::FWK_MSG_BITS;
const POWER_WARM_BOOT_REQ: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0001;
const POWER_PSCI_RESP: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0010;
const VM_CREATED: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0100;
const VM_CREATED_ACK: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0101;
const VM_DESTRUCTED: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0110;
const VM_DESTRUCTED_ACK: u32 = DirectMsgArgs::FWK_MSG_BITS | 0b0111;
}
/// Arguments for the `FFA_MSG_SEND_DIRECT_{REQ,RESP}2` interfaces.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct DirectMsg2Args(pub [u64; 14]);
#[derive(Debug, Default, Eq, PartialEq, Clone, Copy)]
pub struct MsgWaitFlags {
pub retain_rx_buffer: bool,
}
impl MsgWaitFlags {
const RETAIN_RX_BUFFER: u32 = 0x01;
const MBZ_BITS: u32 = 0xfffe;
}
impl TryFrom<u32> for MsgWaitFlags {
type Error = Error;
fn try_from(val: u32) -> Result<Self, Self::Error> {
if (val & Self::MBZ_BITS) != 0 {
Err(Error::InvalidMsgWaitFlag(val))
} else {
Ok(MsgWaitFlags {
retain_rx_buffer: val & Self::RETAIN_RX_BUFFER != 0,
})
}
}
}
impl From<MsgWaitFlags> for u32 {
fn from(flags: MsgWaitFlags) -> Self {
let mut bits: u32 = 0;
if flags.retain_rx_buffer {
bits |= MsgWaitFlags::RETAIN_RX_BUFFER;
}
bits
}
}
/// Descriptor for a dynamically allocated memory buffer that contains the memory transaction
/// descriptor.
///
/// Used by `FFA_MEM_{DONATE,LEND,SHARE,RETRIEVE_REQ}` interfaces, only when the TX buffer is not
/// used to transmit the transaction descriptor.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum MemOpBuf {
Buf32 { addr: u32, page_cnt: u32 },
Buf64 { addr: u64, page_cnt: u32 },
}
/// Memory address argument for `FFA_MEM_PERM_{GET,SET}` interfaces.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum MemAddr {
Addr32(u32),
Addr64(u64),
}
impl MemAddr {
/// Returns the contained address.
pub fn address(&self) -> u64 {
match self {
MemAddr::Addr32(a) => (*a).into(),
MemAddr::Addr64(a) => *a,
}
}
}
/// Argument for the `FFA_CONSOLE_LOG` interface.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum ConsoleLogChars {
Chars32(ConsoleLogChars32),
Chars64(ConsoleLogChars64),
}
/// Generic type for storing `FFA_CONSOLE_LOG` character payload and its length in bytes.
#[derive(Debug, Default, Eq, PartialEq, Clone, Copy)]
pub struct LogChars<T>
where
T: IntoBytes + FromBytes + Immutable,
{
char_cnt: u8,
char_lists: T,
}
impl<T> LogChars<T>
where
T: IntoBytes + FromBytes + Immutable,
{
const MAX_LENGTH: u8 = core::mem::size_of::<T>() as u8;
/// Returns true if there are no characters in the structure.
pub fn empty(&self) -> bool {
self.char_cnt == 0
}
/// Returns true if the structure is full.
pub fn full(&self) -> bool {
self.char_cnt as usize >= core::mem::size_of::<T>()
}
/// Returns the payload bytes.
pub fn bytes(&self) -> &[u8] {
&self.char_lists.as_bytes()[..self.char_cnt as usize]
}
/// Append byte slice to the end of the characters.
pub fn push(&mut self, source: &[u8]) -> usize {
let empty_area = &mut self.char_lists.as_mut_bytes()[self.char_cnt.into()..];
let len = empty_area.len().min(source.len());
empty_area[..len].copy_from_slice(&source[..len]);
self.char_cnt += len as u8;
len
}
}
/// Specialized type for 32-bit `FFA_CONSOLE_LOG` payload.
pub type ConsoleLogChars32 = LogChars<[u32; 6]>;
/// Specialized type for 64-bit `FFA_CONSOLE_LOG` payload.
pub type ConsoleLogChars64 = LogChars<[u64; 16]>;
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct NotificationBindFlags {
pub per_vcpu_notification: bool,
}
impl NotificationBindFlags {
const PER_VCPU_NOTIFICATION: u32 = 1;
}
impl From<NotificationBindFlags> for u32 {
fn from(flags: NotificationBindFlags) -> Self {
let mut bits: u32 = 0;
if flags.per_vcpu_notification {
bits |= NotificationBindFlags::PER_VCPU_NOTIFICATION;
}
bits
}
}
impl From<u32> for NotificationBindFlags {
fn from(flags: u32) -> Self {
Self {
per_vcpu_notification: flags & Self::PER_VCPU_NOTIFICATION != 0,
}
}
}
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct NotificationSetFlags {
pub delay_schedule_receiver: bool,
pub vcpu_id: Option<u16>,
}
impl NotificationSetFlags {
const PER_VCP_NOTIFICATION: u32 = 1 << 0;
const DELAY_SCHEDULE_RECEIVER: u32 = 1 << 1;
const VCPU_ID_SHIFT: u32 = 16;
const MBZ_BITS: u32 = 0xfffc;
}
impl From<NotificationSetFlags> for u32 {
fn from(flags: NotificationSetFlags) -> Self {
let mut bits: u32 = 0;
if flags.delay_schedule_receiver {
bits |= NotificationSetFlags::DELAY_SCHEDULE_RECEIVER;
}
if let Some(vcpu_id) = flags.vcpu_id {
bits |= NotificationSetFlags::PER_VCP_NOTIFICATION;
bits |= u32::from(vcpu_id) << NotificationSetFlags::VCPU_ID_SHIFT;
}
bits
}
}
impl TryFrom<u32> for NotificationSetFlags {
type Error = Error;
fn try_from(flags: u32) -> Result<Self, Self::Error> {
if (flags & Self::MBZ_BITS) != 0 {
return Err(Error::InvalidNotificationSetFlag(flags));
}
let tentative_vcpu_id = (flags >> Self::VCPU_ID_SHIFT) as u16;
let vcpu_id = if (flags & Self::PER_VCP_NOTIFICATION) != 0 {
Some(tentative_vcpu_id)
} else {
if tentative_vcpu_id != 0 {
return Err(Error::InvalidNotificationSetFlag(flags));
}
None
};
Ok(Self {
delay_schedule_receiver: (flags & Self::DELAY_SCHEDULE_RECEIVER) != 0,
vcpu_id,
})
}
}
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct NotificationGetFlags {
pub sp_bitmap_id: bool,
pub vm_bitmap_id: bool,
pub spm_bitmap_id: bool,
pub hyp_bitmap_id: bool,
}
impl NotificationGetFlags {
const SP_BITMAP_ID: u32 = 1;
const VM_BITMAP_ID: u32 = 1 << 1;
const SPM_BITMAP_ID: u32 = 1 << 2;
const HYP_BITMAP_ID: u32 = 1 << 3;
}
impl From<NotificationGetFlags> for u32 {
fn from(flags: NotificationGetFlags) -> Self {
let mut bits: u32 = 0;
if flags.sp_bitmap_id {
bits |= NotificationGetFlags::SP_BITMAP_ID;
}
if flags.vm_bitmap_id {
bits |= NotificationGetFlags::VM_BITMAP_ID;
}
if flags.spm_bitmap_id {
bits |= NotificationGetFlags::SPM_BITMAP_ID;
}
if flags.hyp_bitmap_id {
bits |= NotificationGetFlags::HYP_BITMAP_ID;
}
bits
}
}
impl From<u32> for NotificationGetFlags {
// This is a "from" instead of a "try_from" because Reserved Bits are SBZ, *not* MBZ.
fn from(flags: u32) -> Self {
Self {
sp_bitmap_id: (flags & Self::SP_BITMAP_ID) != 0,
vm_bitmap_id: (flags & Self::VM_BITMAP_ID) != 0,
spm_bitmap_id: (flags & Self::SPM_BITMAP_ID) != 0,
hyp_bitmap_id: (flags & Self::HYP_BITMAP_ID) != 0,
}
}
}
/// `FFA_NOTIFICATION_GET` specific success argument structure.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct SuccessArgsNotificationGet {
pub sp_notifications: Option<u64>,
pub vm_notifications: Option<u64>,
pub spm_notifications: Option<u32>,
pub hypervisor_notifications: Option<u32>,
}
impl From<SuccessArgsNotificationGet> for SuccessArgs {
fn from(value: SuccessArgsNotificationGet) -> Self {
let mut args = [0; 6];
if let Some(bitmap) = value.sp_notifications {
args[0] = bitmap as u32;
args[1] = (bitmap >> 32) as u32;
}
if let Some(bitmap) = value.vm_notifications {
args[2] = bitmap as u32;
args[3] = (bitmap >> 32) as u32;
}
if let Some(bitmap) = value.spm_notifications {
args[4] = bitmap;
}
if let Some(bitmap) = value.hypervisor_notifications {
args[5] = bitmap;
}
Self::Args32(args)
}
}
impl TryFrom<(NotificationGetFlags, SuccessArgs)> for SuccessArgsNotificationGet {
type Error = Error;
fn try_from(value: (NotificationGetFlags, SuccessArgs)) -> Result<Self, Self::Error> {
let (flags, value) = value;
let args = value.try_get_args32()?;
let sp_notifications = if flags.sp_bitmap_id {
Some(u64::from(args[0]) | (u64::from(args[1]) << 32))
} else {
None
};
let vm_notifications = if flags.vm_bitmap_id {
Some(u64::from(args[2]) | (u64::from(args[3]) << 32))
} else {
None
};
let spm_notifications = if flags.spm_bitmap_id {
Some(args[4])
} else {
None
};
let hypervisor_notifications = if flags.hyp_bitmap_id {
Some(args[5])
} else {
None
};
Ok(Self {
sp_notifications,
vm_notifications,
spm_notifications,
hypervisor_notifications,
})
}
}
/// `FFA_NOTIFICATION_INFO_GET` specific success argument structure. The `MAX_COUNT` parameter
/// depends on the 32-bit or 64-bit packing.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub struct SuccessArgsNotificationInfoGet<const MAX_COUNT: usize> {
pub more_pending_notifications: bool,
list_count: usize,
id_counts: [u8; MAX_COUNT],
ids: [u16; MAX_COUNT],
}
impl<const MAX_COUNT: usize> Default for SuccessArgsNotificationInfoGet<MAX_COUNT> {
fn default() -> Self {
Self {
more_pending_notifications: false,
list_count: 0,
id_counts: [0; MAX_COUNT],
ids: [0; MAX_COUNT],
}
}
}
impl<const MAX_COUNT: usize> SuccessArgsNotificationInfoGet<MAX_COUNT> {
const MORE_PENDING_NOTIFICATIONS_FLAG: u64 = 1 << 0;
const LIST_COUNT_SHIFT: usize = 7;
const LIST_COUNT_MASK: u64 = 0x1f;
const ID_COUNT_SHIFT: usize = 12;
const ID_COUNT_MASK: u64 = 0x03;
const ID_COUNT_BITS: usize = 2;
pub fn add_list(&mut self, endpoint: u16, vcpu_ids: &[u16]) -> Result<(), Error> {
if self.list_count >= MAX_COUNT || vcpu_ids.len() > Self::ID_COUNT_MASK as usize {
return Err(Error::InvalidNotificationCount);
}
// Each list contains at least one ID: the partition ID, followed by vCPU IDs. The number
// of vCPU IDs is recorded in `id_counts`.
let mut current_id_index = self.list_count + self.id_counts.iter().sum::<u8>() as usize;
if current_id_index + 1 + vcpu_ids.len() > MAX_COUNT {
// The new list does not fit into the available space for IDs.
return Err(Error::InvalidNotificationCount);
}
self.id_counts[self.list_count] = vcpu_ids.len() as u8;
self.list_count += 1;
// The first ID is the endpoint ID.
self.ids[current_id_index] = endpoint;
current_id_index += 1;
// Insert the vCPU IDs.
self.ids[current_id_index..current_id_index + vcpu_ids.len()].copy_from_slice(vcpu_ids);
Ok(())
}
pub fn iter(&self) -> NotificationInfoGetIterator<'_> {
NotificationInfoGetIterator {
list_index: 0,
id_index: 0,
id_count: &self.id_counts[0..self.list_count],
ids: &self.ids,
}
}
/// Pack flags field and IDs.
fn pack(self) -> (u64, [u16; MAX_COUNT]) {
let mut flags = if self.more_pending_notifications {
Self::MORE_PENDING_NOTIFICATIONS_FLAG
} else {
0
};
flags |= (self.list_count as u64) << Self::LIST_COUNT_SHIFT;
for (count, shift) in self.id_counts.iter().take(self.list_count).zip(
(Self::ID_COUNT_SHIFT..Self::ID_COUNT_SHIFT + Self::ID_COUNT_BITS * MAX_COUNT)
.step_by(Self::ID_COUNT_BITS),
) {
flags |= u64::from(*count) << shift;
}
(flags, self.ids)
}
/// Unpack flags field and IDs.
fn unpack(flags: u64, ids: [u16; MAX_COUNT]) -> Result<Self, Error> {
let count_of_lists = ((flags >> Self::LIST_COUNT_SHIFT) & Self::LIST_COUNT_MASK) as usize;
if count_of_lists > MAX_COUNT {
return Err(Error::InvalidNotificationCount);
}
let mut count_of_ids = [0; MAX_COUNT];
let mut count_of_ids_bits = flags >> Self::ID_COUNT_SHIFT;
for id in count_of_ids.iter_mut().take(count_of_lists) {
*id = (count_of_ids_bits & Self::ID_COUNT_MASK) as u8;
count_of_ids_bits >>= Self::ID_COUNT_BITS;
}
let id_field_count = count_of_lists + count_of_ids.iter().sum::<u8>() as usize;
if id_field_count > MAX_COUNT {
return Err(Error::InvalidNotificationCount);
}
Ok(Self {
more_pending_notifications: (flags & Self::MORE_PENDING_NOTIFICATIONS_FLAG) != 0,
list_count: count_of_lists,
id_counts: count_of_ids,
ids,
})
}
}
/// `FFA_NOTIFICATION_INFO_GET_32` specific success argument structure.
pub type SuccessArgsNotificationInfoGet32 = SuccessArgsNotificationInfoGet<10>;
impl From<SuccessArgsNotificationInfoGet32> for SuccessArgs {
fn from(value: SuccessArgsNotificationInfoGet32) -> Self {
let (flags, ids) = value.pack();
let id_regs: [u32; 5] = transmute!(ids);
let mut args = [0; 6];
args[0] = flags as u32;
args[1..6].copy_from_slice(&id_regs);
SuccessArgs::Args32(args)
}
}
impl TryFrom<SuccessArgs> for SuccessArgsNotificationInfoGet32 {
type Error = Error;
fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
let args = value.try_get_args32()?;
let flags = args[0].into();
let id_regs: [u32; 5] = args[1..6].try_into().unwrap();
Self::unpack(flags, transmute!(id_regs))
}
}
/// `FFA_NOTIFICATION_INFO_GET_64` specific success argument structure.
pub type SuccessArgsNotificationInfoGet64 = SuccessArgsNotificationInfoGet<20>;
impl From<SuccessArgsNotificationInfoGet64> for SuccessArgs {
fn from(value: SuccessArgsNotificationInfoGet64) -> Self {
let (flags, ids) = value.pack();
let id_regs: [u64; 5] = transmute!(ids);
let mut args = [0; 6];
args[0] = flags;
args[1..6].copy_from_slice(&id_regs);
SuccessArgs::Args64(args)
}
}
impl TryFrom<SuccessArgs> for SuccessArgsNotificationInfoGet64 {
type Error = Error;
fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
let args = value.try_get_args64()?;
let flags = args[0];
let id_regs: [u64; 5] = args[1..6].try_into().unwrap();
Self::unpack(flags, transmute!(id_regs))
}
}
pub struct NotificationInfoGetIterator<'a> {
list_index: usize,
id_index: usize,
id_count: &'a [u8],
ids: &'a [u16],
}
impl<'a> Iterator for NotificationInfoGetIterator<'a> {
type Item = (u16, &'a [u16]);
fn next(&mut self) -> Option<Self::Item> {
if self.list_index < self.id_count.len() {
let partition_id = self.ids[self.id_index];
let id_range =
(self.id_index + 1)..=(self.id_index + self.id_count[self.list_index] as usize);
self.id_index += 1 + self.id_count[self.list_index] as usize;
self.list_index += 1;
Some((partition_id, &self.ids[id_range]))
} else {
None
}
}
}
/// FF-A "message types", the terminology used by the spec is "interfaces".
///
/// The interfaces are used by FF-A components for communication at an FF-A instance. The spec also
/// describes the valid FF-A instances and conduits for each interface.
#[derive(Debug, Eq, PartialEq, Clone, Copy)]
pub enum Interface {
Error {
target_info: TargetInfo,
error_code: FfaError,
error_arg: u32,
},
Success {
target_info: TargetInfo,
args: SuccessArgs,
},
Interrupt {
target_info: TargetInfo,
interrupt_id: u32,
},
Version {
input_version: Version,
},
VersionOut {
output_version: Version,
},
Features {
feat_id: Feature,
input_properties: u32,
},
RxAcquire {
vm_id: u16,
},
RxRelease {
vm_id: u16,
},
RxTxMap {
addr: RxTxAddr,
page_cnt: u32,
},
RxTxUnmap {
id: u16,
},
PartitionInfoGet {
uuid: Uuid,
flags: PartitionInfoGetFlags,
},
PartitionInfoGetRegs {
uuid: Uuid,
start_index: u16,
info_tag: u16,
},
IdGet,
SpmIdGet,
MsgWait {
flags: Option<MsgWaitFlags>,
},
Yield,
Run {
target_info: TargetInfo,
},
NormalWorldResume,
SecondaryEpRegister {
entrypoint: SecondaryEpRegisterAddr,
},
MsgSend2 {
sender_vm_id: u16,
flags: MsgSend2Flags,
},
MsgSendDirectReq {
src_id: u16,
dst_id: u16,
args: DirectMsgArgs,
},
MsgSendDirectResp {
src_id: u16,
dst_id: u16,
args: DirectMsgArgs,
},
MsgSendDirectReq2 {
src_id: u16,
dst_id: u16,
uuid: Uuid,
args: DirectMsg2Args,
},
MsgSendDirectResp2 {
src_id: u16,
dst_id: u16,
args: DirectMsg2Args,
},
MemDonate {
total_len: u32,
frag_len: u32,
buf: Option<MemOpBuf>,
},
MemLend {
total_len: u32,
frag_len: u32,
buf: Option<MemOpBuf>,
},
MemShare {
total_len: u32,
frag_len: u32,
buf: Option<MemOpBuf>,
},
MemRetrieveReq {
total_len: u32,
frag_len: u32,
buf: Option<MemOpBuf>,
},
MemRetrieveResp {
total_len: u32,
frag_len: u32,
},
MemRelinquish,
MemReclaim {
handle: memory_management::Handle,
flags: memory_management::MemReclaimFlags,
},
MemPermGet {
addr: MemAddr,
page_cnt: Option<u32>,
},
MemPermSet {
addr: MemAddr,
page_cnt: u32,
mem_perm: memory_management::MemPermissionsGetSet,
},
ConsoleLog {
chars: ConsoleLogChars,
},
NotificationBitmapCreate {
vm_id: u16,
vcpu_cnt: u32,
},
NotificationBitmapDestroy {
vm_id: u16,
},
NotificationBind {
sender_id: u16,
receiver_id: u16,
flags: NotificationBindFlags,
bitmap: u64,
},
NotificationUnbind {
sender_id: u16,
receiver_id: u16,
bitmap: u64,
},
NotificationSet {
sender_id: u16,
receiver_id: u16,
flags: NotificationSetFlags,
bitmap: u64,
},
NotificationGet {
vcpu_id: u16,
endpoint_id: u16,
flags: NotificationGetFlags,
},
NotificationInfoGet {
is_32bit: bool,
},
El3IntrHandle,
}
impl Interface {
/// Returns the function ID for the call, if it has one.
pub fn function_id(&self) -> Option<FuncId> {
match self {
Interface::Error { .. } => Some(FuncId::Error),
Interface::Success { args, .. } => match args {
SuccessArgs::Args32(..) => Some(FuncId::Success32),
SuccessArgs::Args64(..) | SuccessArgs::Args64_2(..) => Some(FuncId::Success64),
},
Interface::Interrupt { .. } => Some(FuncId::Interrupt),
Interface::Version { .. } => Some(FuncId::Version),
Interface::VersionOut { .. } => None,
Interface::Features { .. } => Some(FuncId::Features),
Interface::RxAcquire { .. } => Some(FuncId::RxAcquire),
Interface::RxRelease { .. } => Some(FuncId::RxRelease),
Interface::RxTxMap { addr, .. } => match addr {
RxTxAddr::Addr32 { .. } => Some(FuncId::RxTxMap32),
RxTxAddr::Addr64 { .. } => Some(FuncId::RxTxMap64),
},
Interface::RxTxUnmap { .. } => Some(FuncId::RxTxUnmap),
Interface::PartitionInfoGet { .. } => Some(FuncId::PartitionInfoGet),
Interface::PartitionInfoGetRegs { .. } => Some(FuncId::PartitionInfoGetRegs),
Interface::IdGet => Some(FuncId::IdGet),
Interface::SpmIdGet => Some(FuncId::SpmIdGet),
Interface::MsgWait { .. } => Some(FuncId::MsgWait),
Interface::Yield => Some(FuncId::Yield),
Interface::Run { .. } => Some(FuncId::Run),
Interface::NormalWorldResume => Some(FuncId::NormalWorldResume),
Interface::SecondaryEpRegister { entrypoint } => match entrypoint {
SecondaryEpRegisterAddr::Addr32 { .. } => Some(FuncId::SecondaryEpRegister32),
SecondaryEpRegisterAddr::Addr64 { .. } => Some(FuncId::SecondaryEpRegister64),
},
Interface::MsgSend2 { .. } => Some(FuncId::MsgSend2),
Interface::MsgSendDirectReq { args, .. } => match args {
DirectMsgArgs::Args32(_) => Some(FuncId::MsgSendDirectReq32),
DirectMsgArgs::Args64(_) => Some(FuncId::MsgSendDirectReq64),
DirectMsgArgs::VersionReq { .. } => Some(FuncId::MsgSendDirectReq32),
DirectMsgArgs::PowerPsciReq32 { .. } => Some(FuncId::MsgSendDirectReq32),
DirectMsgArgs::PowerPsciReq64 { .. } => Some(FuncId::MsgSendDirectReq64),
DirectMsgArgs::PowerWarmBootReq { .. } => Some(FuncId::MsgSendDirectReq32),
DirectMsgArgs::VmCreated { .. } => Some(FuncId::MsgSendDirectReq32),
DirectMsgArgs::VmDestructed { .. } => Some(FuncId::MsgSendDirectReq32),
_ => panic!("Invalid direct request arguments: {:#?}", args),
},
Interface::MsgSendDirectResp { args, .. } => match args {
DirectMsgArgs::Args32(_) => Some(FuncId::MsgSendDirectResp32),
DirectMsgArgs::Args64(_) => Some(FuncId::MsgSendDirectResp64),
DirectMsgArgs::VersionResp { .. } => Some(FuncId::MsgSendDirectResp32),
DirectMsgArgs::PowerPsciResp { .. } => Some(FuncId::MsgSendDirectResp32),
DirectMsgArgs::VmCreatedAck { .. } => Some(FuncId::MsgSendDirectResp32),
DirectMsgArgs::VmDestructedAck { .. } => Some(FuncId::MsgSendDirectResp32),
_ => panic!("Invalid direct response arguments: {:#?}", args),
},
Interface::MsgSendDirectReq2 { .. } => Some(FuncId::MsgSendDirectReq64_2),
Interface::MsgSendDirectResp2 { .. } => Some(FuncId::MsgSendDirectResp64_2),
Interface::MemDonate { buf, .. } => match buf {
Some(MemOpBuf::Buf64 { .. }) => Some(FuncId::MemDonate64),
_ => Some(FuncId::MemDonate32),
},
Interface::MemLend { buf, .. } => match buf {
Some(MemOpBuf::Buf64 { .. }) => Some(FuncId::MemLend64),
_ => Some(FuncId::MemLend32),
},
Interface::MemShare { buf, .. } => match buf {
Some(MemOpBuf::Buf64 { .. }) => Some(FuncId::MemShare64),
_ => Some(FuncId::MemShare32),
},
Interface::MemRetrieveReq { buf, .. } => match buf {
Some(MemOpBuf::Buf64 { .. }) => Some(FuncId::MemRetrieveReq64),
_ => Some(FuncId::MemRetrieveReq32),
},
Interface::MemRetrieveResp { .. } => Some(FuncId::MemRetrieveResp),
Interface::MemRelinquish => Some(FuncId::MemRelinquish),
Interface::MemReclaim { .. } => Some(FuncId::MemReclaim),
Interface::MemPermGet { addr, .. } => match addr {
MemAddr::Addr32(_) => Some(FuncId::MemPermGet32),
MemAddr::Addr64(_) => Some(FuncId::MemPermGet64),
},
Interface::MemPermSet { addr, .. } => match addr {
MemAddr::Addr32(_) => Some(FuncId::MemPermSet32),
MemAddr::Addr64(_) => Some(FuncId::MemPermSet64),
},
Interface::ConsoleLog { chars, .. } => match chars {
ConsoleLogChars::Chars32(_) => Some(FuncId::ConsoleLog32),
ConsoleLogChars::Chars64(_) => Some(FuncId::ConsoleLog64),
},
Interface::NotificationBitmapCreate { .. } => Some(FuncId::NotificationBitmapCreate),
Interface::NotificationBitmapDestroy { .. } => Some(FuncId::NotificationBitmapDestroy),
Interface::NotificationBind { .. } => Some(FuncId::NotificationBind),
Interface::NotificationUnbind { .. } => Some(FuncId::NotificationUnbind),
Interface::NotificationSet { .. } => Some(FuncId::NotificationSet),
Interface::NotificationGet { .. } => Some(FuncId::NotificationGet),
Interface::NotificationInfoGet { is_32bit } => match is_32bit {
true => Some(FuncId::NotificationInfoGet32),
false => Some(FuncId::NotificationInfoGet64),
},
Interface::El3IntrHandle => Some(FuncId::El3IntrHandle),
}
}
/// Returns true if this is a 32-bit call, or false if it is a 64-bit call.
pub fn is_32bit(&self) -> bool {
if matches!(self, Self::VersionOut { .. }) {
return true;
}
self.function_id().unwrap().is_32bit()
}
/// Returns the FF-A version that has introduced the function ID.
pub fn minimum_ffa_version(&self) -> Version {
if matches!(self, Self::VersionOut { .. }) {
return Version(1, 0);
}
self.function_id().unwrap().minimum_ffa_version()
}
/// Parse interface from register contents. The caller must ensure that the `regs` argument has
/// the correct length: 8 registers for FF-A v1.1 and lower, 18 registers for v1.2 and higher.
pub fn from_regs(version: Version, regs: &[u64]) -> Result<Self, Error> {
let func_id = FuncId::try_from(regs[0] as u32)?;
if version < func_id.minimum_ffa_version() {
return Err(Error::InvalidVersionForFunctionId(version, func_id));
}
let reg_cnt = regs.len();
let msg = match reg_cnt {
8 => {
assert!(version <= Version(1, 1));
Interface::unpack_regs8(version, regs.try_into().unwrap())?
}
18 => {
assert!(version >= Version(1, 2));
match func_id {
FuncId::ConsoleLog64
| FuncId::Success64
| FuncId::MsgSendDirectReq64_2
| FuncId::MsgSendDirectResp64_2
| FuncId::PartitionInfoGetRegs => {
Interface::unpack_regs18(version, regs.try_into().unwrap())?
}
_ => Interface::unpack_regs8(version, regs[..8].try_into().unwrap())?,
}
}
_ => panic!(
"Invalid number of registers ({}) for FF-A version {}",
reg_cnt, version
),
};
Ok(msg)
}
fn unpack_regs8(version: Version, regs: &[u64; 8]) -> Result<Self, Error> {
let fid = FuncId::try_from(regs[0] as u32)?;
let msg = match fid {
FuncId::Error => Self::Error {
target_info: (regs[1] as u32).into(),
error_code: FfaError::try_from(regs[2] as i32)?,
error_arg: regs[3] as u32,
},
FuncId::Success32 => Self::Success {
target_info: (regs[1] as u32).into(),
args: SuccessArgs::Args32([
regs[2] as u32,
regs[3] as u32,
regs[4] as u32,
regs[5] as u32,
regs[6] as u32,
regs[7] as u32,
]),
},
FuncId::Success64 => Self::Success {
target_info: (regs[1] as u32).into(),
args: SuccessArgs::Args64([regs[2], regs[3], regs[4], regs[5], regs[6], regs[7]]),
},
FuncId::Interrupt => Self::Interrupt {
target_info: (regs[1] as u32).into(),
interrupt_id: regs[2] as u32,
},
FuncId::Version => Self::Version {
input_version: (regs[1] as u32).try_into()?,
},
FuncId::Features => Self::Features {
feat_id: (regs[1] as u32).into(),
input_properties: regs[2] as u32,
},
FuncId::RxAcquire => Self::RxAcquire {
vm_id: regs[1] as u16,
},
FuncId::RxRelease => Self::RxRelease {
vm_id: regs[1] as u16,
},
FuncId::RxTxMap32 => {
let addr = RxTxAddr::Addr32 {
rx: regs[2] as u32,
tx: regs[1] as u32,
};
let page_cnt = regs[3] as u32;
Self::RxTxMap { addr, page_cnt }
}
FuncId::RxTxMap64 => {
let addr = RxTxAddr::Addr64 {
rx: regs[2],
tx: regs[1],
};
let page_cnt = regs[3] as u32;
Self::RxTxMap { addr, page_cnt }
}
FuncId::RxTxUnmap => Self::RxTxUnmap { id: regs[1] as u16 },
FuncId::PartitionInfoGet => {
let uuid_words = [
regs[1] as u32,
regs[2] as u32,
regs[3] as u32,
regs[4] as u32,
];
let mut bytes: [u8; 16] = [0; 16];
for (i, b) in uuid_words.iter().flat_map(|w| w.to_le_bytes()).enumerate() {
bytes[i] = b;
}
Self::PartitionInfoGet {
uuid: Uuid::from_bytes(bytes),
flags: PartitionInfoGetFlags::try_from(regs[5] as u32)?,
}
}
FuncId::IdGet => Self::IdGet,
FuncId::SpmIdGet => Self::SpmIdGet,
FuncId::MsgWait => Self::MsgWait {
flags: if version >= Version(1, 2) {
Some(MsgWaitFlags::try_from(regs[2] as u32)?)
} else {
None
},
},
FuncId::Yield => Self::Yield,
FuncId::Run => Self::Run {
target_info: (regs[1] as u32).into(),
},
FuncId::NormalWorldResume => Self::NormalWorldResume,
FuncId::SecondaryEpRegister32 => Self::SecondaryEpRegister {
entrypoint: SecondaryEpRegisterAddr::Addr32(regs[1] as u32),
},
FuncId::SecondaryEpRegister64 => Self::SecondaryEpRegister {
entrypoint: SecondaryEpRegisterAddr::Addr64(regs[1]),
},
FuncId::MsgSend2 => Self::MsgSend2 {
sender_vm_id: regs[1] as u16,
flags: (regs[2] as u32).try_into()?,
},
FuncId::MsgSendDirectReq32 => Self::MsgSendDirectReq {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
args: if (regs[2] as u32 & DirectMsgArgs::FWK_MSG_BITS) != 0 {
match regs[2] as u32 {
DirectMsgArgs::VERSION_REQ => DirectMsgArgs::VersionReq {
version: Version::try_from(regs[3] as u32)?,
},
DirectMsgArgs::POWER_PSCI_REQ => DirectMsgArgs::PowerPsciReq32 {
params: [
regs[3] as u32,
regs[4] as u32,
regs[5] as u32,
regs[6] as u32,
],
},
DirectMsgArgs::POWER_WARM_BOOT_REQ => DirectMsgArgs::PowerWarmBootReq {
boot_type: WarmBootType::try_from(regs[3] as u32)?,
},
DirectMsgArgs::VM_CREATED => DirectMsgArgs::VmCreated {
handle: memory_management::Handle::from([
regs[3] as u32,
regs[4] as u32,
]),
vm_id: regs[5] as u16,
},
DirectMsgArgs::VM_DESTRUCTED => DirectMsgArgs::VmDestructed {
handle: memory_management::Handle::from([
regs[3] as u32,
regs[4] as u32,
]),
vm_id: regs[5] as u16,
},
_ => return Err(Error::UnrecognisedFwkMsg(regs[2] as u32)),
}
} else {
DirectMsgArgs::Args32([
regs[3] as u32,
regs[4] as u32,
regs[5] as u32,
regs[6] as u32,
regs[7] as u32,
])
},
},
FuncId::MsgSendDirectReq64 => Self::MsgSendDirectReq {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
args: if (regs[2] & DirectMsgArgs::FWK_MSG_BITS as u64) != 0 {
match regs[2] as u32 {
DirectMsgArgs::POWER_PSCI_REQ => DirectMsgArgs::PowerPsciReq64 {
params: [regs[3], regs[4], regs[5], regs[6]],
},
_ => return Err(Error::UnrecognisedFwkMsg(regs[2] as u32)),
}
} else {
DirectMsgArgs::Args64([regs[3], regs[4], regs[5], regs[6], regs[7]])
},
},
FuncId::MsgSendDirectResp32 => Self::MsgSendDirectResp {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
args: if (regs[2] as u32 & DirectMsgArgs::FWK_MSG_BITS) != 0 {
match regs[2] as u32 {
DirectMsgArgs::VERSION_RESP => {
if regs[3] as i32 == FfaError::NotSupported.into() {
DirectMsgArgs::VersionResp { version: None }
} else {
DirectMsgArgs::VersionResp {
version: Some(Version::try_from(regs[3] as u32)?),
}
}
}
DirectMsgArgs::POWER_PSCI_RESP => DirectMsgArgs::PowerPsciResp {
psci_status: regs[3] as i32,
},
DirectMsgArgs::VM_CREATED_ACK => DirectMsgArgs::VmCreatedAck {
sp_status: (regs[3] as i32).try_into()?,
},
DirectMsgArgs::VM_DESTRUCTED_ACK => DirectMsgArgs::VmDestructedAck {
sp_status: (regs[3] as i32).try_into()?,
},
_ => return Err(Error::UnrecognisedFwkMsg(regs[2] as u32)),
}
} else {
DirectMsgArgs::Args32([
regs[3] as u32,
regs[4] as u32,
regs[5] as u32,
regs[6] as u32,
regs[7] as u32,
])
},
},
FuncId::MsgSendDirectResp64 => Self::MsgSendDirectResp {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
args: if (regs[2] & DirectMsgArgs::FWK_MSG_BITS as u64) != 0 {
return Err(Error::UnrecognisedFwkMsg(regs[2] as u32));
} else {
DirectMsgArgs::Args64([regs[3], regs[4], regs[5], regs[6], regs[7]])
},
},
FuncId::MemDonate32 => Self::MemDonate {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf32 {
addr: regs[3] as u32,
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemDonate64 => Self::MemDonate {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf64 {
addr: regs[3],
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemLend32 => Self::MemLend {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf32 {
addr: regs[3] as u32,
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemLend64 => Self::MemLend {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf64 {
addr: regs[3],
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemShare32 => Self::MemShare {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf32 {
addr: regs[3] as u32,
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemShare64 => Self::MemShare {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf64 {
addr: regs[3],
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemRetrieveReq32 => Self::MemRetrieveReq {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf32 {
addr: regs[3] as u32,
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemRetrieveReq64 => Self::MemRetrieveReq {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
buf: if regs[3] != 0 && regs[4] != 0 {
Some(MemOpBuf::Buf64 {
addr: regs[3],
page_cnt: regs[4] as u32,
})
} else {
None
},
},
FuncId::MemRetrieveResp => Self::MemRetrieveResp {
total_len: regs[1] as u32,
frag_len: regs[2] as u32,
},
FuncId::MemRelinquish => Self::MemRelinquish,
FuncId::MemReclaim => Self::MemReclaim {
handle: memory_management::Handle::from([regs[1] as u32, regs[2] as u32]),
flags: (regs[3] as u32).try_into()?,
},
FuncId::MemPermGet32 => Self::MemPermGet {
addr: MemAddr::Addr32(regs[1] as u32),
page_cnt: if version >= Version(1, 3) {
Some(regs[2] as u32)
} else {
None
},
},
FuncId::MemPermGet64 => Self::MemPermGet {
addr: MemAddr::Addr64(regs[1]),
page_cnt: if version >= Version(1, 3) {
Some(regs[2] as u32)
} else {
None
},
},
FuncId::MemPermSet32 => Self::MemPermSet {
addr: MemAddr::Addr32(regs[1] as u32),
page_cnt: regs[2] as u32,
mem_perm: (regs[3] as u32).try_into()?,
},
FuncId::MemPermSet64 => Self::MemPermSet {
addr: MemAddr::Addr64(regs[1]),
page_cnt: regs[2] as u32,
mem_perm: (regs[3] as u32).try_into()?,
},
FuncId::ConsoleLog32 => {
let char_cnt = regs[1] as u8;
if char_cnt > ConsoleLogChars32::MAX_LENGTH {
return Err(Error::InvalidCharacterCount(char_cnt));
}
Self::ConsoleLog {
chars: ConsoleLogChars::Chars32(ConsoleLogChars32 {
char_cnt,
char_lists: [
regs[2] as u32,
regs[3] as u32,
regs[4] as u32,
regs[5] as u32,
regs[6] as u32,
regs[7] as u32,
],
}),
}
}
FuncId::NotificationBitmapCreate => {
let tentative_vm_id = regs[1] as u32;
if (tentative_vm_id >> 16) != 0 {
return Err(Error::InvalidVmId(tentative_vm_id));
}
Self::NotificationBitmapCreate {
vm_id: tentative_vm_id as u16,
vcpu_cnt: regs[2] as u32,
}
}
FuncId::NotificationBitmapDestroy => {
let tentative_vm_id = regs[1] as u32;
if (tentative_vm_id >> 16) != 0 {
return Err(Error::InvalidVmId(tentative_vm_id));
}
Self::NotificationBitmapDestroy {
vm_id: tentative_vm_id as u16,
}
}
FuncId::NotificationBind => Self::NotificationBind {
sender_id: (regs[1] >> 16) as u16,
receiver_id: regs[1] as u16,
flags: (regs[2] as u32).into(),
bitmap: (regs[4] << 32) | (regs[3] & 0xffff_ffff),
},
FuncId::NotificationUnbind => Self::NotificationUnbind {
sender_id: (regs[1] >> 16) as u16,
receiver_id: regs[1] as u16,
bitmap: (regs[4] << 32) | (regs[3] & 0xffff_ffff),
},
FuncId::NotificationSet => Self::NotificationSet {
sender_id: (regs[1] >> 16) as u16,
receiver_id: regs[1] as u16,
flags: (regs[2] as u32).try_into()?,
bitmap: (regs[4] << 32) | (regs[3] & 0xffff_ffff),
},
FuncId::NotificationGet => Self::NotificationGet {
vcpu_id: (regs[1] >> 16) as u16,
endpoint_id: regs[1] as u16,
flags: (regs[2] as u32).into(),
},
FuncId::NotificationInfoGet32 => Self::NotificationInfoGet { is_32bit: true },
FuncId::NotificationInfoGet64 => Self::NotificationInfoGet { is_32bit: false },
FuncId::El3IntrHandle => Self::El3IntrHandle,
_ => panic!("Invalid number of registers (8) for function {:#x?}", fid),
};
Ok(msg)
}
fn unpack_regs18(version: Version, regs: &[u64; 18]) -> Result<Self, Error> {
assert!(version >= Version(1, 2));
let fid = FuncId::try_from(regs[0] as u32)?;
let msg = match fid {
FuncId::Success64 => Self::Success {
target_info: (regs[1] as u32).into(),
args: SuccessArgs::Args64_2(regs[2..18].try_into().unwrap()),
},
FuncId::MsgSendDirectReq64_2 => Self::MsgSendDirectReq2 {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
uuid: Uuid::from_u64_pair(regs[2].swap_bytes(), regs[3].swap_bytes()),
args: DirectMsg2Args(regs[4..18].try_into().unwrap()),
},
FuncId::MsgSendDirectResp64_2 => Self::MsgSendDirectResp2 {
src_id: (regs[1] >> 16) as u16,
dst_id: regs[1] as u16,
args: DirectMsg2Args(regs[4..18].try_into().unwrap()),
},
FuncId::ConsoleLog64 => {
let char_cnt = regs[1] as u8;
if char_cnt > ConsoleLogChars64::MAX_LENGTH {
return Err(Error::InvalidCharacterCount(char_cnt));
}
Self::ConsoleLog {
chars: ConsoleLogChars::Chars64(ConsoleLogChars64 {
char_cnt,
char_lists: regs[2..18].try_into().unwrap(),
}),
}
}
FuncId::PartitionInfoGetRegs => {
// Bits[15:0]: Start index
let start_index = (regs[3] & 0xffff) as u16;
let info_tag = ((regs[3] >> 16) & 0xffff) as u16;
Self::PartitionInfoGetRegs {
uuid: Uuid::from_u64_pair(regs[1].swap_bytes(), regs[2].swap_bytes()),
start_index,
info_tag: if start_index == 0 && info_tag != 0 {
return Err(Error::InvalidInformationTag(info_tag));
} else {
info_tag
},
}
}
_ => panic!("Invalid number of registers (18) for function {:#x?}", fid),
};
Ok(msg)
}
/// Create register contents for an interface.
pub fn to_regs(&self, version: Version, regs: &mut [u64]) {
assert!(self.minimum_ffa_version() <= version);
let reg_cnt = regs.len();
match reg_cnt {
8 => {
assert!(version <= Version(1, 1));
regs.fill(0);
self.pack_regs8(version, (&mut regs[..8]).try_into().unwrap());
}
18 => {
assert!(version >= Version(1, 2));
regs.fill(0);
match self {
Interface::ConsoleLog {
chars: ConsoleLogChars::Chars64(_),
..
}
| Interface::Success {
args: SuccessArgs::Args64_2(_),
..
}
| Interface::MsgSendDirectReq2 { .. }
| Interface::MsgSendDirectResp2 { .. }
| Interface::PartitionInfoGetRegs { .. } => {
self.pack_regs18(version, regs.try_into().unwrap());
}
_ => {
self.pack_regs8(version, (&mut regs[..8]).try_into().unwrap());
}
}
}
_ => panic!("Invalid number of registers {}", reg_cnt),
}
}
fn pack_regs8(&self, version: Version, a: &mut [u64; 8]) {
if let Some(function_id) = self.function_id() {
a[0] = function_id as u64;
}
match *self {
Interface::Error {
target_info,
error_code,
error_arg,
} => {
a[1] = u32::from(target_info).into();
a[2] = (error_code as u32).into();
a[3] = error_arg.into();
}
Interface::Success { target_info, args } => {
a[1] = u32::from(target_info).into();
match args {
SuccessArgs::Args32(regs) => {
a[2] = regs[0].into();
a[3] = regs[1].into();
a[4] = regs[2].into();
a[5] = regs[3].into();
a[6] = regs[4].into();
a[7] = regs[5].into();
}
SuccessArgs::Args64(regs) => {
a[2] = regs[0];
a[3] = regs[1];
a[4] = regs[2];
a[5] = regs[3];
a[6] = regs[4];
a[7] = regs[5];
}
_ => panic!("{:#x?} requires 18 registers", args),
}
}
Interface::Interrupt {
target_info,
interrupt_id,
} => {
a[1] = u32::from(target_info).into();
a[2] = interrupt_id.into();
}
Interface::Version { input_version } => {
a[1] = u32::from(input_version).into();
}
Interface::VersionOut { output_version } => {
a[0] = u32::from(output_version).into();
}
Interface::Features {
feat_id,
input_properties,
} => {
a[1] = u32::from(feat_id).into();
a[2] = input_properties.into();
}
Interface::RxAcquire { vm_id } => {
a[1] = vm_id.into();
}
Interface::RxRelease { vm_id } => {
a[1] = vm_id.into();
}
Interface::RxTxMap { addr, page_cnt } => {
match addr {
RxTxAddr::Addr32 { rx, tx } => {
a[1] = tx.into();
a[2] = rx.into();
}
RxTxAddr::Addr64 { rx, tx } => {
a[1] = tx;
a[2] = rx;
}
}
a[3] = page_cnt.into();
}
Interface::RxTxUnmap { id } => {
a[1] = id.into();
}
Interface::PartitionInfoGet { uuid, flags } => {
let bytes = uuid.into_bytes();
a[1] = u32::from_le_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]).into();
a[2] = u32::from_le_bytes([bytes[4], bytes[5], bytes[6], bytes[7]]).into();
a[3] = u32::from_le_bytes([bytes[8], bytes[9], bytes[10], bytes[11]]).into();
a[4] = u32::from_le_bytes([bytes[12], bytes[13], bytes[14], bytes[15]]).into();
a[5] = u32::from(flags).into();
}
Interface::MsgWait { flags } => {
if version >= Version(1, 2) {
if let Some(flags) = flags {
a[2] = u32::from(flags).into();
}
}
}
Interface::IdGet | Interface::SpmIdGet | Interface::Yield => {}
Interface::Run { target_info } => {
a[1] = u32::from(target_info).into();
}
Interface::NormalWorldResume => {}
Interface::SecondaryEpRegister { entrypoint } => match entrypoint {
SecondaryEpRegisterAddr::Addr32(addr) => a[1] = addr as u64,
SecondaryEpRegisterAddr::Addr64(addr) => a[1] = addr,
},
Interface::MsgSend2 {
sender_vm_id,
flags,
} => {
a[1] = sender_vm_id.into();
a[2] = u32::from(flags).into();
}
Interface::MsgSendDirectReq {
src_id,
dst_id,
args,
} => {
a[1] = ((src_id as u64) << 16) | dst_id as u64;
match args {
DirectMsgArgs::Args32(args) => {
a[3] = args[0].into();
a[4] = args[1].into();
a[5] = args[2].into();
a[6] = args[3].into();
a[7] = args[4].into();
}
DirectMsgArgs::Args64(args) => {
a[3] = args[0];
a[4] = args[1];
a[5] = args[2];
a[6] = args[3];
a[7] = args[4];
}
DirectMsgArgs::VersionReq { version } => {
a[2] = DirectMsgArgs::VERSION_REQ.into();
a[3] = u32::from(version).into();
}
DirectMsgArgs::PowerPsciReq32 { params } => {
a[2] = DirectMsgArgs::POWER_PSCI_REQ.into();
a[3] = params[0].into();
a[4] = params[1].into();
a[5] = params[2].into();
a[6] = params[3].into();
}
DirectMsgArgs::PowerPsciReq64 { params } => {
a[2] = DirectMsgArgs::POWER_PSCI_REQ.into();
a[3] = params[0];
a[4] = params[1];
a[5] = params[2];
a[6] = params[3];
}
DirectMsgArgs::PowerWarmBootReq { boot_type } => {
a[2] = DirectMsgArgs::POWER_WARM_BOOT_REQ.into();
a[3] = u32::from(boot_type).into();
}
DirectMsgArgs::VmCreated { handle, vm_id } => {
a[2] = DirectMsgArgs::VM_CREATED.into();
let handle_regs: [u32; 2] = handle.into();
a[3] = handle_regs[0].into();
a[4] = handle_regs[1].into();
a[5] = vm_id.into();
}
DirectMsgArgs::VmDestructed { handle, vm_id } => {
a[2] = DirectMsgArgs::VM_DESTRUCTED.into();
let handle_regs: [u32; 2] = handle.into();
a[3] = handle_regs[0].into();
a[4] = handle_regs[1].into();
a[5] = vm_id.into();
}
_ => panic!("Malformed MsgSendDirectReq interface"),
}
}
Interface::MsgSendDirectResp {
src_id,
dst_id,
args,
} => {
a[1] = ((src_id as u64) << 16) | dst_id as u64;
match args {
DirectMsgArgs::Args32(args) => {
a[3] = args[0].into();
a[4] = args[1].into();
a[5] = args[2].into();
a[6] = args[3].into();
a[7] = args[4].into();
}
DirectMsgArgs::Args64(args) => {
a[3] = args[0];
a[4] = args[1];
a[5] = args[2];
a[6] = args[3];
a[7] = args[4];
}
DirectMsgArgs::VersionResp { version } => {
a[2] = DirectMsgArgs::VERSION_RESP.into();
match version {
None => a[3] = (i32::from(FfaError::NotSupported) as u32).into(),
Some(ver) => a[3] = u32::from(ver).into(),
}
}
DirectMsgArgs::PowerPsciResp { psci_status } => {
a[2] = DirectMsgArgs::POWER_PSCI_RESP.into();
a[3] = (psci_status as u32).into();
}
DirectMsgArgs::VmCreatedAck { sp_status } => {
a[2] = DirectMsgArgs::VM_CREATED_ACK.into();
a[3] = (i32::from(sp_status) as u32).into();
}
DirectMsgArgs::VmDestructedAck { sp_status } => {
a[2] = DirectMsgArgs::VM_DESTRUCTED_ACK.into();
a[3] = (i32::from(sp_status) as u32).into();
}
_ => panic!("Malformed MsgSendDirectResp interface"),
}
}
Interface::MemDonate {
total_len,
frag_len,
buf,
} => {
a[1] = total_len.into();
a[2] = frag_len.into();
(a[3], a[4]) = match buf {
Some(MemOpBuf::Buf32 { addr, page_cnt }) => (addr.into(), page_cnt.into()),
Some(MemOpBuf::Buf64 { addr, page_cnt }) => (addr, page_cnt.into()),
None => (0, 0),
};
}
Interface::MemLend {
total_len,
frag_len,
buf,
} => {
a[1] = total_len.into();
a[2] = frag_len.into();
(a[3], a[4]) = match buf {
Some(MemOpBuf::Buf32 { addr, page_cnt }) => (addr.into(), page_cnt.into()),
Some(MemOpBuf::Buf64 { addr, page_cnt }) => (addr, page_cnt.into()),
None => (0, 0),
};
}
Interface::MemShare {
total_len,
frag_len,
buf,
} => {
a[1] = total_len.into();
a[2] = frag_len.into();
(a[3], a[4]) = match buf {
Some(MemOpBuf::Buf32 { addr, page_cnt }) => (addr.into(), page_cnt.into()),
Some(MemOpBuf::Buf64 { addr, page_cnt }) => (addr, page_cnt.into()),
None => (0, 0),
};
}
Interface::MemRetrieveReq {
total_len,
frag_len,
buf,
} => {
a[1] = total_len.into();
a[2] = frag_len.into();
(a[3], a[4]) = match buf {
Some(MemOpBuf::Buf32 { addr, page_cnt }) => (addr.into(), page_cnt.into()),
Some(MemOpBuf::Buf64 { addr, page_cnt }) => (addr, page_cnt.into()),
None => (0, 0),
};
}
Interface::MemRetrieveResp {
total_len,
frag_len,
} => {
a[1] = total_len.into();
a[2] = frag_len.into();
}
Interface::MemRelinquish => {}
Interface::MemReclaim { handle, flags } => {
let handle_regs: [u32; 2] = handle.into();
a[1] = handle_regs[0].into();
a[2] = handle_regs[1].into();
a[3] = u32::from(flags).into();
}
Interface::MemPermGet { addr, page_cnt } => {
a[1] = match addr {
MemAddr::Addr32(addr) => addr.into(),
MemAddr::Addr64(addr) => addr,
};
a[2] = if version >= Version(1, 3) {
page_cnt.unwrap().into()
} else {
assert!(page_cnt.is_none());
0
}
}
Interface::MemPermSet {
addr,
page_cnt,
mem_perm,
} => {
a[1] = match addr {
MemAddr::Addr32(addr) => addr.into(),
MemAddr::Addr64(addr) => addr,
};
a[2] = page_cnt.into();
a[3] = u32::from(mem_perm).into();
}
Interface::ConsoleLog { chars } => match chars {
ConsoleLogChars::Chars32(ConsoleLogChars32 {
char_cnt,
char_lists,
}) => {
a[1] = char_cnt.into();
a[2] = char_lists[0].into();
a[3] = char_lists[1].into();
a[4] = char_lists[2].into();
a[5] = char_lists[3].into();
a[6] = char_lists[4].into();
a[7] = char_lists[5].into();
}
_ => panic!("{:#x?} requires 18 registers", chars),
},
Interface::NotificationBitmapCreate { vm_id, vcpu_cnt } => {
a[1] = vm_id.into();
a[2] = vcpu_cnt.into();
}
Interface::NotificationBitmapDestroy { vm_id } => {
a[1] = vm_id.into();
}
Interface::NotificationBind {
sender_id,
receiver_id,
flags,
bitmap,
} => {
a[1] = (u64::from(sender_id) << 16) | u64::from(receiver_id);
a[2] = u32::from(flags).into();
a[3] = bitmap & 0xffff_ffff;
a[4] = bitmap >> 32;
}
Interface::NotificationUnbind {
sender_id,
receiver_id,
bitmap,
} => {
a[1] = (u64::from(sender_id) << 16) | u64::from(receiver_id);
a[3] = bitmap & 0xffff_ffff;
a[4] = bitmap >> 32;
}
Interface::NotificationSet {
sender_id,
receiver_id,
flags,
bitmap,
} => {
a[1] = (u64::from(sender_id) << 16) | u64::from(receiver_id);
a[2] = u32::from(flags).into();
a[3] = bitmap & 0xffff_ffff;
a[4] = bitmap >> 32;
}
Interface::NotificationGet {
vcpu_id,
endpoint_id,
flags,
} => {
a[1] = (u64::from(vcpu_id) << 16) | u64::from(endpoint_id);
a[2] = u32::from(flags).into();
}
Interface::NotificationInfoGet { .. } => {}
Interface::El3IntrHandle => {}
_ => panic!("{:#x?} requires 18 registers", self),
}
}
fn pack_regs18(&self, version: Version, a: &mut [u64; 18]) {
assert!(version >= Version(1, 2));
if let Some(function_id) = self.function_id() {
a[0] = function_id as u64;
}
match *self {
Interface::Success { target_info, args } => {
a[1] = u32::from(target_info).into();
match args {
SuccessArgs::Args64_2(regs) => a[2..18].copy_from_slice(&regs[..16]),
_ => panic!("{:#x?} requires 8 registers", args),
}
}
Interface::MsgSendDirectReq2 {
src_id,
dst_id,
uuid,
args,
} => {
a[1] = ((src_id as u64) << 16) | dst_id as u64;
let (uuid_msb, uuid_lsb) = uuid.as_u64_pair();
(a[2], a[3]) = (uuid_msb.swap_bytes(), uuid_lsb.swap_bytes());
a[4..18].copy_from_slice(&args.0[..14]);
}
Interface::MsgSendDirectResp2 {
src_id,
dst_id,
args,
} => {
a[1] = ((src_id as u64) << 16) | dst_id as u64;
a[2] = 0;
a[3] = 0;
a[4..18].copy_from_slice(&args.0[..14]);
}
Interface::ConsoleLog { chars: char_lists } => match char_lists {
ConsoleLogChars::Chars64(ConsoleLogChars64 {
char_cnt,
char_lists,
}) => {
a[1] = char_cnt.into();
a[2..18].copy_from_slice(&char_lists[..16])
}
_ => panic!("{:#x?} requires 8 registers", char_lists),
},
Interface::PartitionInfoGetRegs {
uuid,
start_index,
info_tag,
} => {
if start_index == 0 && info_tag != 0 {
panic!("Information Tag MBZ if start index is 0: {:#x?}", self);
}
let (uuid_msb, uuid_lsb) = uuid.as_u64_pair();
(a[1], a[2]) = (uuid_msb.swap_bytes(), uuid_lsb.swap_bytes());
a[3] = (u64::from(info_tag) << 16) | u64::from(start_index);
}
_ => panic!("{:#x?} requires 8 registers", self),
}
}
/// Helper function to create an `FFA_SUCCESS` interface without any arguments.
pub fn success32_noargs() -> Self {
Self::Success {
target_info: TargetInfo::default(),
args: SuccessArgs::Args32([0; 6]),
}
}
/// Helper function to create an `FFA_ERROR` interface with an error code.
pub fn error(error_code: FfaError) -> Self {
Self::Error {
target_info: TargetInfo::default(),
error_code,
error_arg: 0,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn version_reg_count() {
assert!(!Version(1, 1).needs_18_regs());
assert!(Version(1, 2).needs_18_regs())
}
#[test]
fn part_info_get_regs() {
let uuid = Uuid::parse_str("a1a2a3a4-b1b2-c1c2-d1d2-d3d4d5d6d7d8").unwrap();
let uuid_bytes = uuid.as_bytes();
let test_info_tag = 0b1101_1101;
let test_start_index = 0b1101;
let start_index_and_tag = (test_info_tag << 16) | test_start_index;
let version = Version(1, 2);
// From spec:
// Bytes[0...7] of UUID with byte 0 in the low-order bits.
let reg_x1 = ((uuid_bytes[7] as u64) << 56)
| ((uuid_bytes[6] as u64) << 48)
| ((uuid_bytes[5] as u64) << 40)
| ((uuid_bytes[4] as u64) << 32)
| ((uuid_bytes[3] as u64) << 24)
| ((uuid_bytes[2] as u64) << 16)
| ((uuid_bytes[1] as u64) << 8)
| (uuid_bytes[0] as u64);
// From spec:
// Bytes[8...15] of UUID with byte 8 in the low-order bits.
let reg_x2 = ((uuid_bytes[15] as u64) << 56)
| ((uuid_bytes[14] as u64) << 48)
| ((uuid_bytes[13] as u64) << 40)
| ((uuid_bytes[12] as u64) << 32)
| ((uuid_bytes[11] as u64) << 24)
| ((uuid_bytes[10] as u64) << 16)
| ((uuid_bytes[9] as u64) << 8)
| (uuid_bytes[8] as u64);
// First, test for wrong tag:
{
let mut regs = [0u64; 18];
regs[0] = FuncId::PartitionInfoGetRegs as u64;
regs[1] = reg_x1;
regs[2] = reg_x2;
regs[3] = test_info_tag << 16;
assert!(Interface::from_regs(version, &regs).is_err_and(
|e| e == Error::InvalidInformationTag(test_info_tag.try_into().unwrap())
));
}
// Test for regs -> Interface -> regs
{
let mut orig_regs = [0u64; 18];
orig_regs[0] = FuncId::PartitionInfoGetRegs as u64;
orig_regs[1] = reg_x1;
orig_regs[2] = reg_x2;
orig_regs[3] = start_index_and_tag;
let mut test_regs = orig_regs;
let interface = Interface::from_regs(version, &test_regs).unwrap();
match &interface {
Interface::PartitionInfoGetRegs {
info_tag,
start_index,
uuid: int_uuid,
} => {
assert_eq!(u64::from(*info_tag), test_info_tag);
assert_eq!(u64::from(*start_index), test_start_index);
assert_eq!(*int_uuid, uuid);
}
_ => panic!("Expecting Interface::PartitionInfoGetRegs!"),
}
test_regs.fill(0);
interface.to_regs(version, &mut test_regs);
assert_eq!(orig_regs, test_regs);
}
// Test for Interface -> regs -> Interface
{
let interface = Interface::PartitionInfoGetRegs {
info_tag: test_info_tag.try_into().unwrap(),
start_index: test_start_index.try_into().unwrap(),
uuid,
};
let mut regs: [u64; 18] = [0; 18];
interface.to_regs(version, &mut regs);
assert_eq!(Some(FuncId::PartitionInfoGetRegs), interface.function_id());
assert_eq!(regs[0], interface.function_id().unwrap() as u64);
assert_eq!(regs[1], reg_x1);
assert_eq!(regs[2], reg_x2);
assert_eq!(regs[3], (test_info_tag << 16) | test_start_index);
assert_eq!(Interface::from_regs(version, &regs).unwrap(), interface);
}
}
#[test]
fn msg_send_direct_req2() {
let uuid = Uuid::parse_str("a1a2a3a4-b1b2-c1c2-d1d2-d3d4d5d6d7d8").unwrap();
let uuid_bytes = uuid.as_bytes();
// From spec:
// Bytes[0...7] of UUID with byte 0 in the low-order bits.
let reg_x2 = ((uuid_bytes[7] as u64) << 56)
| ((uuid_bytes[6] as u64) << 48)
| ((uuid_bytes[5] as u64) << 40)
| ((uuid_bytes[4] as u64) << 32)
| ((uuid_bytes[3] as u64) << 24)
| ((uuid_bytes[2] as u64) << 16)
| ((uuid_bytes[1] as u64) << 8)
| (uuid_bytes[0] as u64);
// From spec:
// Bytes[8...15] of UUID with byte 8 in the low-order bits.
let reg_x3 = ((uuid_bytes[15] as u64) << 56)
| ((uuid_bytes[14] as u64) << 48)
| ((uuid_bytes[13] as u64) << 40)
| ((uuid_bytes[12] as u64) << 32)
| ((uuid_bytes[11] as u64) << 24)
| ((uuid_bytes[10] as u64) << 16)
| ((uuid_bytes[9] as u64) << 8)
| (uuid_bytes[8] as u64);
let test_sender = 0b1101_1101;
let test_receiver = 0b1101;
let test_sender_receiver = (test_sender << 16) | test_receiver;
let version = Version(1, 2);
// Test for regs -> Interface -> regs
{
let mut orig_regs = [0u64; 18];
orig_regs[0] = FuncId::MsgSendDirectReq64_2 as u64;
orig_regs[1] = test_sender_receiver;
orig_regs[2] = reg_x2;
orig_regs[3] = reg_x3;
let mut test_regs = orig_regs;
let interface = Interface::from_regs(version, &test_regs).unwrap();
match &interface {
Interface::MsgSendDirectReq2 {
dst_id,
src_id,
args: _,
uuid: int_uuid,
} => {
assert_eq!(u64::from(*src_id), test_sender);
assert_eq!(u64::from(*dst_id), test_receiver);
assert_eq!(*int_uuid, uuid);
}
_ => panic!("Expecting Interface::MsgSendDirectReq2!"),
}
test_regs.fill(0);
interface.to_regs(version, &mut test_regs);
assert_eq!(orig_regs, test_regs);
}
// Test for Interface -> regs -> Interface
{
let rest_of_regs: [u64; 14] = [0; 14];
let interface = Interface::MsgSendDirectReq2 {
src_id: test_sender.try_into().unwrap(),
dst_id: test_receiver.try_into().unwrap(),
uuid,
args: DirectMsg2Args(rest_of_regs),
};
let mut regs: [u64; 18] = [0; 18];
interface.to_regs(version, &mut regs);
assert_eq!(Some(FuncId::MsgSendDirectReq64_2), interface.function_id());
assert_eq!(regs[0], interface.function_id().unwrap() as u64);
assert_eq!(regs[1], test_sender_receiver);
assert_eq!(regs[2], reg_x2);
assert_eq!(regs[3], reg_x3);
assert_eq!(regs[4], 0);
assert_eq!(Interface::from_regs(version, &regs).unwrap(), interface);
}
}
#[test]
fn is_32bit() {
let interface_64 = Interface::MsgSendDirectReq {
src_id: 0,
dst_id: 1,
args: DirectMsgArgs::Args64([0, 0, 0, 0, 0]),
};
assert!(!interface_64.is_32bit());
let interface_32 = Interface::MsgSendDirectReq {
src_id: 0,
dst_id: 1,
args: DirectMsgArgs::Args32([0, 0, 0, 0, 0]),
};
assert!(interface_32.is_32bit());
}
#[test]
fn success_args_notification_info_get32() {
let mut notifications = SuccessArgsNotificationInfoGet32::default();
// 16.7.1.1 Example usage
notifications.add_list(0x0000, &[0, 2, 3]).unwrap();
notifications.add_list(0x0000, &[4, 6]).unwrap();
notifications.add_list(0x0002, &[]).unwrap();
notifications.add_list(0x0003, &[1]).unwrap();
let args: SuccessArgs = notifications.into();
assert_eq!(
SuccessArgs::Args32([
0x0004_b200,
0x0000_0000,
0x0003_0002,
0x0004_0000,
0x0002_0006,
0x0001_0003
]),
args
);
let notifications = SuccessArgsNotificationInfoGet32::try_from(args).unwrap();
let mut iter = notifications.iter();
assert_eq!(Some((0x0000, &[0, 2, 3][..])), iter.next());
assert_eq!(Some((0x0000, &[4, 6][..])), iter.next());
assert_eq!(Some((0x0002, &[][..])), iter.next());
assert_eq!(Some((0x0003, &[1][..])), iter.next());
}
#[test]
fn success_args_notification_info_get64() {
let mut notifications = SuccessArgsNotificationInfoGet64::default();
// 16.7.1.1 Example usage
notifications.add_list(0x0000, &[0, 2, 3]).unwrap();
notifications.add_list(0x0000, &[4, 6]).unwrap();
notifications.add_list(0x0002, &[]).unwrap();
notifications.add_list(0x0003, &[1]).unwrap();
let args: SuccessArgs = notifications.into();
assert_eq!(
SuccessArgs::Args64([
0x0004_b200,
0x0003_0002_0000_0000,
0x0002_0006_0004_0000,
0x0000_0000_0001_0003,
0x0000_0000_0000_0000,
0x0000_0000_0000_0000,
]),
args
);
let notifications = SuccessArgsNotificationInfoGet64::try_from(args).unwrap();
let mut iter = notifications.iter();
assert_eq!(Some((0x0000, &[0, 2, 3][..])), iter.next());
assert_eq!(Some((0x0000, &[4, 6][..])), iter.next());
assert_eq!(Some((0x0002, &[][..])), iter.next());
assert_eq!(Some((0x0003, &[1][..])), iter.next());
}
}