There is a race condition in CoreWaitForEvent function: If an interrupt happens between CheckEvent and gIdleLoopEvent, there would be a event pending during cpu sleep. So it is required to check the gEventPending with the interrupt disabled. Implement a gEfiCpu2ProtocolGuid to fix that. The protocol include one interface to enable interrupt and put the cpu to sleep.
Add a event protocol gEdkiiCommonEventProtocolGuid to support all TPL event. It is require for PI drivers that use HW interrput. Cc: Jian J Wang <jian.j.w...@intel.com> Cc: Hao A Wu <hao.a...@intel.com> cc: Ray Ni <ray...@intel.com> Cc: Star Zeng <star.z...@intel.com> Cc: Liming gao <liming....@intel.com> Cc: Sean Brogan <sean.bro...@microsoft.com> Cc: Michael Turner <michael.tur...@microsoft.com> Cc: Bret Barkelew <bret.barke...@microsoft.com> Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Eric Dong <eric.d...@intel.com> Cc: Laszlo Ersek <ler...@redhat.com> Sean Brogan (5): MdeModulePkg: Add gEdkiiCommonEventProtocolGuid for event MdePkg/BaseLib.h: Add EnableInterruptsAndSleep function declare MdePkg/BaseLib: Implement EnableInterruptsAndSleep MdePkg: Add gEfiCpu2ProtocolGuid and header file MdeModulePkg/DxeMain: Implement common event protocol Zhichao Gao (1): UefiCpuPkg/CpuDxe: Implement Cpu2 protocol MdeModulePkg/Core/Dxe/DxeMain.h | 64 ++++++++++- MdeModulePkg/Core/Dxe/DxeMain.inf | 1 + MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 22 ++++ .../Core/Dxe/DxeMain/DxeProtocolNotify.c | 1 + MdeModulePkg/Core/Dxe/Event/Event.c | 102 ++++++++++++++++-- MdeModulePkg/Core/Dxe/Event/Event.h | 2 +- MdeModulePkg/Include/Protocol/CommonEvent.h | 18 ++++ MdeModulePkg/MdeModulePkg.dec | 3 + MdePkg/Include/Library/BaseLib.h | 11 ++ MdePkg/Include/Protocol/Cpu2.h | 43 ++++++++ .../Library/BaseLib/Ia32/EnableInterrupts.c | 18 +++- .../BaseLib/Ia32/EnableInterrupts.nasm | 15 ++- .../Library/BaseLib/X64/EnableInterrupts.nasm | 15 ++- MdePkg/MdePkg.dec | 3 + UefiCpuPkg/CpuDxe/CpuDxe.c | 40 ++++++- UefiCpuPkg/CpuDxe/CpuDxe.h | 15 +++ UefiCpuPkg/CpuDxe/CpuDxe.inf | 3 +- 17 files changed, 358 insertions(+), 18 deletions(-) create mode 100644 MdeModulePkg/Include/Protocol/CommonEvent.h create mode 100644 MdePkg/Include/Protocol/Cpu2.h -- 2.21.0.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#41302): https://edk2.groups.io/g/devel/message/41302 Mute This Topic: https://groups.io/mt/31741727/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
