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 <kun.qin@microsoft.com>
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>
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 <yeoreum.yun@arm.com>
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 <kun.qin@microsoft.com>
Patch 8d03c42d38 ("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 <mohamed.morsy@arm.com>
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 <kun.qin@microsoft.com>
2025-04-10 17:52:48 +00:00
Renamed from ArmPkg/Library/ArmFfaLib/ArmFfaCommon.c (Browse further)
