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Platform/ARM: drop SPM_MM support #960

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4c73324
Platform/ARM: drop SPM_MM support
LeviYeoReum Mar 18, 2026
7888442
Platform/ARM/Drivers: drop SPM_MM support from FwuSmm
LeviYeoReum Mar 18, 2026
942bf56
Platform/ARM/Drivers: drop SPM_MM support from FtpmSmm
LeviYeoReum Mar 18, 2026
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1 change: 0 additions & 1 deletion Platform/ARM/Drivers/FtpmSmm/FtpmSmm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1126,7 +1126,6 @@ FtpmPseudoCrbInit (
if (Locality == 0) {
/*
* default locality is 0, always assigned unless disabled.
* this is for SPM_MM using with ARM_SMC method.
*/
CrbReg->LocalityState |= PTP_CRB_LOCALITY_STATE_LOCALITY_ASSIGNED;
}
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19 changes: 9 additions & 10 deletions Platform/ARM/Drivers/FwuSmm/FwuSmm.c
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Expand Up @@ -1356,17 +1356,16 @@ FwuEventHandler (
return EFI_INVALID_PARAMETER;
}

if (MmHandlerContext->CommProtocol == CommProtocolFfa) {
FfaMsgInfo = &MmHandlerContext->CtxData.FfaMsgInfo;
if (MmHandlerContext->CommProtocol != CommProtocolFfa) {
return EFI_UNSUPPORTED;
}

if ((FfaMsgInfo->ServiceType == ServiceTypeMmCommunication) ||
(FfaMsgInfo->DirectMsgVersion != DirectMsgV2))
{
// via mm communication protocol (FF-A).
return EFI_UNSUPPORTED;
}
} else {
// via mm communication protocol (SPM_MM).
FfaMsgInfo = &MmHandlerContext->CtxData.FfaMsgInfo;

if ((FfaMsgInfo->ServiceType == ServiceTypeMmCommunication) ||
(FfaMsgInfo->DirectMsgVersion != DirectMsgV2))
{
// via mm communication protocol (FF-A).
return EFI_UNSUPPORTED;
}

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17 changes: 0 additions & 17 deletions Platform/ARM/Readme.md
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Expand Up @@ -353,23 +353,8 @@ The Standalone MM binary is generated at the following location:

TF-A supports the following ABIs to communicate with Standalone MM:

- SPM_MM
- FF-A (>= v1.2)

#### Building TF-A with SPM_MM as the communication ABI
TF-A should be built with the following additional build flags:
```
BL32={StandaloneMm Binary} SPM_MM=1 CTX_INCLUDE_FPREGS=1 TRANSFER_LIST=1 HOB_LIST=1
```

e.g.
```
cd tf-a
make all PLAT=fvp CROSS_COMPILE={cross_compile_prefix} DEBUG=1 V=1 CSS_NON_SECURE_UART=1 EXTRA_EL2_INIT=1 \
EL3_EXCEPTION_HANDLING=1 ENABLE_SME2_FOR_NS=0 ENABLE_SME_FOR_NS=0 ENABLE_SVE_FOR_NS=0 CTX_INCLUDE_AARCH32_REGS=0 \
BL32={StandaloneMm Binary} SPM_MM=1 CTX_INCLUDE_FPREGS=1 TRANSFER_LIST=1 HOB_LIST=1
```

#### Building TF-A with FF-A as the communication ABI
TF-A should be built with the following additional build flags:
```
Expand All @@ -393,8 +378,6 @@ The FIP image should be generated with the following additional option with FF-A
--tos-fw-config $TF_A_DIR/build/fvp/<debug|release>/fdts/fvp_stmm_manifest.dtb"
```

SPM_MM doesn't need to add --tos-fw-config option.

e.g.
```
cd tf-a
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