[edk2-devel] [PATCH V2 0/4] Fix race condition and add event protocol
Gao, Zhichao
zhichao.gao at intel.com
Tue Jul 9 08:39:52 UTC 2019
V1:
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.
V2:
Move EnableInterruptsAndSleep to UefiCpuPkg/CpuDxe. It is inappropiate
to add it to MdePkg which should only contain code base on the UEFI spec.
Change the name gEfiCpu2ProtocolGuid to gEdkiiCpu2ProtocolGuid.
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Hao A Wu <hao.a.wu at intel.com>
cc: Ray Ni <ray.ni at intel.com>
Cc: Star Zeng <star.zeng at intel.com>
Cc: Liming gao <liming.gao at intel.com>
Cc: Sean Brogan <sean.brogan at microsoft.com>
Cc: Michael Turner <Michael.Turner at microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew at microsoft.com>
Cc: Michael D Kinney <michael.d.kinney at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
Sean Brogan (3):
MdeModulePkg: Add gEdkiiCpu2ProtocolGuid and header file
UefiCpuPkg/CpuDxe: Implement Cpu2 protocol
MdeModulePkg/DxeMain: Implement common event protocol
Zhichao Gao (1):
MdeModulePkg: Add gEdkiiCommonEventProtocolGuid for creating event
MdeModulePkg/Core/Dxe/DxeMain.h | 64 ++++++++++-
MdeModulePkg/Core/Dxe/DxeMain.inf | 2 +
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/Include/Protocol/Cpu2.h | 43 ++++++++
MdeModulePkg/MdeModulePkg.dec | 6 ++
UefiCpuPkg/CpuDxe/CpuDxe.c | 38 +++++++
UefiCpuPkg/CpuDxe/CpuDxe.h | 25 +++++
UefiCpuPkg/CpuDxe/CpuDxe.inf | 3 +
.../CpuDxe/Ia32/EnableInterruptsAndSleep.c | 24 +++++
.../CpuDxe/X64/EnableInterruptsAndSleep.nasm | 31 ++++++
14 files changed, 368 insertions(+), 13 deletions(-)
create mode 100644 MdeModulePkg/Include/Protocol/CommonEvent.h
create mode 100644 MdeModulePkg/Include/Protocol/Cpu2.h
create mode 100644 UefiCpuPkg/CpuDxe/Ia32/EnableInterruptsAndSleep.c
create mode 100644 UefiCpuPkg/CpuDxe/X64/EnableInterruptsAndSleep.nasm
--
2.21.0.windows.1
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