This patch adds support for PEIMs in UefiDevicePathLib. Although this library and DEVICE_PATH_PROTOCOL itself was initially intended for DXE the use case of unlocking opal-locked storage devices during S3 resume makes it useful in PEI.
As it is the change will break the users who will need to change the name of the infs. This can be avoided at the cost of a dedicated inf file just for PEI or by keeping the name UefiDevicePathLibStandaloneMm without adding Pei phase indication. This change is a preparation for a more robust support for PCIe enumeration in PEI. More details on DevicePath use cases in PEI can be found in this discussion: https://edk2.groups.io/g/rfc/topic/proposal_to_add_support_for/86658203?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,86658203,previd=1640220793375011242,nextid=1626916856753718458&previd=1640220793375011242&nextid=1626916856753718458 Tests: - Change has been tested by building a PEI PciHostBridgeLib instance which uses AppendDevicePathNode function. That PciHostBridgeLib was then used in PEIM that enumerates PCI devices and that PEIM was able to get the root bridge information along with the correct root bridge device path. Changes in v2: - Reverted file name changes, PEIM is added to UefiDevicePathLibStandaloneMm.inf Change in v3: - Converted UefiDevicePathLibStandaloneMm.inf to UefiDevicePathLibBase.inf Base lib can be used in every environment but but some functionalities in FileDevicePath will not work due to lack of access to EFI_HANDLE in SEC/PEI/SMM. Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Liming Gao <gaolim...@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang....@intel.com> Mateusz Albecki (1): MdePkg/UefiDevicePathLib: Add support for PEIMs MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c | 6 ++++++ ...athUtilitiesStandaloneMm.c => DevicePathUtilitiesBase.c} | 0 ...icePathLibStandaloneMm.inf => UefiDevicePathLibBase.inf} | 6 +++--- MdePkg/MdePkg.dsc | 2 +- 4 files changed, 10 insertions(+), 4 deletions(-) rename MdePkg/Library/UefiDevicePathLib/{DevicePathUtilitiesStandaloneMm.c => DevicePathUtilitiesBase.c} (100%) rename MdePkg/Library/UefiDevicePathLib/{UefiDevicePathLibStandaloneMm.inf => UefiDevicePathLibBase.inf} (87%) -- 2.28.0.windows.1 --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#90983): https://edk2.groups.io/g/devel/message/90983 Mute This Topic: https://groups.io/mt/92110120/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
