We want to stop parsing DeviceTree to gather hardware information. Instead we ask TF-A for those details using SMC calls. On real hardware platform it could be asking on-board Embedded Controller.
If TF-A answer to SMC call would be not success then we assume that it is old version and go back to parsing DeviceTree data directly. Just now it is present in one place (SbsaQemuHardwareInfoLib) together with new code for handling SMC stuff. I hope that we can drop FdtHandler part as part of 202411 release. TF-A part: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/25707 After this change the only place where DT data is parsed directly is checking for memory nodes. Patches for that code will be sent once we get SMC calls into TF-A. Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org> --- Marcin Juszkiewicz (4): Platform/SbsaQemu: add SbsaQemuHardwareInfoLib Platform/SbsaQemu: read amount of cpus during init Platform/SbsaQemu: use PcdCoreCount directly Platform/SbsaQemu: move FdtHandlerLib to SbsaQemuHardwareInfoLib Platform/Qemu/SbsaQemu/SbsaQemu.dsc | 4 +- Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf | 6 +- .../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf | 4 +- .../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf | 4 +- .../SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf | 33 ---- .../SbsaQemuHardwareInfoLib.inf | 34 ++++ .../SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h | 2 + .../Qemu/SbsaQemu/Include/Library/FdtHelperLib.h | 36 ---- .../Include/Library/SbsaQemuHardwareInfoLib.h | 45 +++++ Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c | 10 +- .../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c | 16 +- .../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 9 +- .../SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c | 98 ---------- .../SbsaQemuHardwareInfoLib.c | 204 ++++++++++++++++++++ 14 files changed, 308 insertions(+), 197 deletions(-) --- base-commit: a1598bbcd167f4a5cf61229156426ef6f0784ab3 change-id: 20240115-no-dt-for-cpu-2c511393df93 Best regards, -- Marcin Juszkiewicz <marcin.juszkiew...@linaro.org> -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#113873): https://edk2.groups.io/g/devel/message/113873 Mute This Topic: https://groups.io/mt/103758013/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-