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QuarkSocPkg/QncSmmDispatcher: Fix context passed to SMI handlers 

https://bugzilla.tianocore.org/show_bug.cgi?id=136

1) Add CallbackContext field to the DATABASE_RECORD structure that
   is set to the RegisterContent value passed to QNCSmmCoreRegister().
   This is the content that must be passed to the SMI handler when
   its source is triggered.

2) Update usage of ChildContext field in the DATABASE_RECOD to use
   CopyMem() instead of structure assignments to avoid compiler
   use of memcpy() intrinsics

This issue was reproduced using the unit test at:

https://github.com/mdkinney/edk2/tree/Bug51/Reproduce

An ASSERT() is generated the first time the periodic SMI
handler is triggered.  After applying this patch, the
DEBUG() messages from the periodic SMI handler in this
unit test are generated.

Cc: Kelly Steele <kelly.steele@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Kelly Steele <kelly.steele@intel.com>
This commit is contained in:
Michael Kinney 2016-10-04 20:03:24 -07:00
parent f9c3b1b534
commit 29f169d17a
3 changed files with 11 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
QuarkSocPkg/QuarkNorthCluster/Smm/DxeSmm/QncSmmDispatcher/QNC/QNCSmmPeriodicTimer.c
View File

@ -1,7 +1,7 @@
/** @file
File to contain all the hardware specific stuff for the Periodical Timer dispatch protocol.
Copyright (c) 2013-2015 Intel Corporation.
Copyright (c) 2013-2016 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -177,7 +177,7 @@ PeriodicTimerGetContext (
// Update the elapsed time w/ the data from our tables
//
Record->CommBuffer.PeriodicTimer.ElapsedTime += TimerInterval->Interval;
*HwContext = Record->ChildContext;
CopyMem (HwContext, &Record->ChildContext, sizeof (QNC_SMM_CONTEXT));
}
}

3
QuarkSocPkg/QuarkNorthCluster/Smm/DxeSmm/QncSmmDispatcher/QNCSmm.h
View File

@ -1,7 +1,7 @@
/** @file
Prototypes and defines for the QNC SMM Dispatcher.
Copyright (c) 2013-2015 Intel Corporation.
Copyright (c) 2013-2016 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -397,6 +397,7 @@ struct _DATABASE_RECORD {
//
EFI_SMM_HANDLER_ENTRY_POINT2 Callback;
QNC_SMM_CONTEXT ChildContext;
VOID *CallbackContext;
QNC_SMM_BUFFER CommBuffer;
UINTN BufferSize;

10
QuarkSocPkg/QuarkNorthCluster/Smm/DxeSmm/QncSmmDispatcher/QNCSmmCore.c
View File

@ -2,7 +2,7 @@
This driver is responsible for the registration of child drivers
and the abstraction of the QNC SMI sources.
Copyright (c) 2013-2015 Intel Corporation.
Copyright (c) 2013-2016 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -351,7 +351,8 @@ Returns:
// Gather information about the registration request
//
Record->Callback = DispatchFunction;
Record->ChildContext = *RegisterContext;
Record->CallbackContext = RegisterContext;
CopyMem (&Record->ChildContext, RegisterContext, sizeof (QNC_SMM_CONTEXT));
Qualified = QUALIFIED_PROTOCOL_FROM_GENERIC (This);
@ -407,7 +408,7 @@ Returns:
//
// Update ChildContext again as SwSmiInputValue has been changed
//
Record->ChildContext = *RegisterContext;
CopyMem (&Record->ChildContext, RegisterContext, sizeof (QNC_SMM_CONTEXT));
}
//
@ -688,7 +689,6 @@ QNCSmmCoreDispatcher (
// it supplied in registration. Simply pass back what it gave us.
//
ASSERT (RecordToExhaust->Callback != NULL);
Context = RecordToExhaust->ChildContext;
ContextsMatch = TRUE;
}
@ -710,7 +710,7 @@ QNCSmmCoreDispatcher (
RecordToExhaust->Callback (
(EFI_HANDLE) & RecordToExhaust->Link,
&Context,
RecordToExhaust->CallbackContext,
CommunicationBuffer,
&BufferSize
);