Tianocore/edk2.git/MdeModulePkg/Library/ArmFfaLib/ArmFfaCommon.c, branch edk2_master

MdePkg,MdeModulePkg/ArmFfaLib: introduce ArmFfaGetPartitionInfo()

2026-01-08T12:07:46+00:00

Introduce ArmFfaGetPartitionInfo(), which retrieves the first partition associated with the service GUID. This allows us to remove duplicated code previously used to obtain the partition ID. Signed-off-by: Yeoreum Yun Continuous-integration-options: PatchCheck.ignore-multi-package

MdePkg, MdeModulePkg/ArmFfaLib: add funcs to get partition info via regs

2026-01-08T12:07:46+00:00

Starting from FF-A v1.2 [0], the FFA_PARTITION_INFO_GET_REGS interface was added to retrieve partition information through registers. This ABI is useful in environments where the Rx/Tx buffer does not need to be mapped, or where buffer mapping is not supported for retrieving partition information. To support this, two new APIs are introduced: ArmFfaLibPartitionInfoGetRegs() and ArmFfaLibPartitionCountGetRegs(). Link: https://developer.arm.com/documentation/den0077/latest [0] Continuous-integration-options: PatchCheck.ignore-multi-package Signed-off-by: Yeoreum Yun

MdeModulePkg: ArmFfaLib: Add FFA_YIELD handling

2025-10-31T07:26:12+00:00

If a secure partition on AArch64 platforms would consume extended time to operate with peripherals, it might elect to yield the control back to normal world and expect the normal world to callback after hinted period of time. This change adds the FFA_YIELD handling from ArmFfaLib to support long operations from secure partitions. Timeout arguments are ignored because systems in this context cannot benefit from the timeout period. Treating FFA_YIELD like FFA_INTERRUPT and expecting the caller to invoke FFA_RUN is the least disruptive approach while achieving the intended behavior. This was tested on proprietary hardware platforms and booted to Windows. Signed-off-by: Kun Qin

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

2025-09-08T13:14:00+00:00

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: 5d1b38dd07c4 ("ArmPkg: Add ArmFfaLib used in Dxe driver") Reported-by: Mariam Elshakfy Signed-off-by: Yeoreum Yun

MdeModulePkg/Library: commonize some duplicate code in ArmFfaLib

2025-07-14T11:59:38+00:00

Some of code for handling Rx/Tx buffer is duplicate. This patch commonize some of duplication routine used in Rx/Tx buffer related functions. Signed-off-by: Yeoreum Yun

MdeModulePkg: ArmFfaLib: Support UUID-GUID conversion interfaces

2025-06-05T05:01:57+00:00

This change moves the existing ConvertEfiGuidToUuid function to public interface to support newly defined functions prototypes. This change also adds the `ArmConvertUuidToEfiGuid` function implementation, which is an inverse of the original conversion. Signed-off-by: Kun Qin

ArmFfaLib: Replace SMCCC_VERSION check with FF-A version check

2025-05-01T11:51:16+00:00

Patch 8d03c42d38d1 ("ArmPkg: ArmFfaLib: Update FF-A direct message to support 18 registers") calls SMCCC_VERSION by default during FF-A initialization even if the SMC conduit is not enabled. This leads to sending malformed FF-A versions if the SVC conduit is used instead. This is observed for example when using an SPMC@EL-1 (e.g. rust-spmc) which receives the FF-A message via an SVC call and interprets SMCCC_VERSION as an FF-A Function ID and subsequently fails to handle it. Since 18-register support is only support with FF-A >= 1.2, replace SMCCC_VERSION check with FF-A version check Signed-off-by: Mohamed Gamal Morsy

ArmPkg: ArmFfaLib: Move ArmFfaLib implementation to MdeModulePkg

2025-04-10T17:52:48+00:00

ArmFfaLib is an implementation of an industry specification-defined interface with UEFI specific method of handling Rx/Tx buffer sharing across multiple boot phases, which is more appropriately placed in MdeModulePkg. This update relocates the implementation of ArmFfaLib to MdeModulePkg, thereby supporting the FFA call primitives for all other packages that depend on this interface. Continuous-integration-options: PatchCheck.ignore-multi-package Signed-off-by: Kun Qin