dasharo/edk2-upstream
0
0
Fork 0
mirror of https://github.com/Dasharo/edk2-upstream.git synced 2026-06-13 19:16:19 -07:00
Code Issues Packages Projects Releases Wiki Activity

Global: fix ArmFfaLibRun() caller couldn't get ret-args

Browse Source 
When ArmFfaLibDirectMsgReq(2) is preempted, caller of these functions
should resume it works via ArmFfaLibRun() and the secure partition
will be return with FFA_DIRECT_MSG_RESP(2) with return arguments.

However, since ArmFfaLibRun() gets its return in its stack variable,
So caller of ArmFfaLibRun() doesn't get the return arguments from
secure partition.

To resolve this, add output parameter to ArmFfaLibRun() to
receive return arguments.

Continuous-integration-options: PatchCheck.ignore-multi-package
Fixes: 5d1b38dd07 ("ArmPkg: Add ArmFfaLib used in Dxe driver")
Reported-by: Mariam Elshakfy <Mariam.Elshakfy@arm.com>
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
This commit is contained in:
Levi Yun
2025-09-08 13:14:00 +00:00
committed by mergify[bot]
parent 57230fff6b
commit d8e875e625
6 changed files with 51 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MdeModulePkg/Library/ArmFfaLib/ArmFfaCommon.c
+38 -3
View File
@@ -535,6 +535,7 @@ ErrorHandler:
@param [in] PartId Partition id
@param [in] CpuNumber Cpu number in partition
@param [out] DirectMsgArg return arguments for direct msg resp/resp2
@retval EFI_SUCCESS
@retval Other Error
@@ -543,10 +544,12 @@ ErrorHandler:
EFI_STATUS
EFIAPI
ArmFfaLibRun (
IN UINT16 PartId,
IN UINT16 CpuNumber
IN UINT16 PartId,
IN UINT16 CpuNumber,
OUT DIRECT_MSG_ARGS *DirectMsgArg OPTIONAL
)
{
EFI_STATUS Status;
ARM_FFA_ARGS FfaArgs;
ZeroMem (&FfaArgs, sizeof (ARM_FFA_ARGS));
@@ -556,7 +559,39 @@ ArmFfaLibRun (
ArmCallFfa (&FfaArgs);
return FfaArgsToEfiStatus (&FfaArgs);
Status = FfaArgsToEfiStatus (&FfaArgs);
if (EFI_ERROR (Status)) {
return Status;
}
if (DirectMsgArg != NULL) {
ZeroMem (DirectMsgArg, sizeof (DIRECT_MSG_ARGS));
if (FfaArgs.Arg0 == ARM_FID_FFA_MSG_SEND_DIRECT_RESP) {
DirectMsgArg->Arg0 = FfaArgs.Arg3;
DirectMsgArg->Arg1 = FfaArgs.Arg4;
DirectMsgArg->Arg2 = FfaArgs.Arg5;
DirectMsgArg->Arg3 = FfaArgs.Arg6;
DirectMsgArg->Arg4 = FfaArgs.Arg7;
} else if (FfaArgs.Arg0 == ARM_FID_FFA_MSG_SEND_DIRECT_RESP2) {
DirectMsgArg->Arg0 = FfaArgs.Arg4;
DirectMsgArg->Arg1 = FfaArgs.Arg5;
DirectMsgArg->Arg2 = FfaArgs.Arg6;
DirectMsgArg->Arg3 = FfaArgs.Arg7;
DirectMsgArg->Arg4 = FfaArgs.Arg8;
DirectMsgArg->Arg5 = FfaArgs.Arg9;
DirectMsgArg->Arg6 = FfaArgs.Arg10;
DirectMsgArg->Arg7 = FfaArgs.Arg11;
DirectMsgArg->Arg8 = FfaArgs.Arg12;
DirectMsgArg->Arg9 = FfaArgs.Arg13;
DirectMsgArg->Arg10 = FfaArgs.Arg14;
DirectMsgArg->Arg11 = FfaArgs.Arg15;
DirectMsgArg->Arg12 = FfaArgs.Arg16;
DirectMsgArg->Arg13 = FfaArgs.Arg17;
}
}
return Status;
}
/**