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IntelFsp2Pkg: FSP should not override IDT 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1265

FSP should not override IDT table when it is initialized
by boot loader. IDT should be re-initialized in FSP only
when it is invalid.
To mitigate temporary memory usage a PCD
PcdFspMaxInterruptSupported created for platform to decide
how many interrupts the FSP IDT table can support.

Test: Verified on internal platform and boots successfully.

Cc: Jiewen Yao <Jiewen.yao@intel.com>
Cc: Desimone Nathaniel L <nathaniel.l.desimone@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
This commit is contained in:
Chasel, Chiu 2018-10-19 17:10:30 +08:00
parent 5061efe70d
commit b1cc6f672f
4 changed files with 26 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
IntelFsp2Pkg/FspSecCore/FspSecCoreM.inf
View File

@ -62,6 +62,7 @@
gIntelFsp2PkgTokenSpaceGuid.PcdTemporaryRamSize ## CONSUMES
gIntelFsp2PkgTokenSpaceGuid.PcdFspTemporaryRamSize ## CONSUMES
gIntelFsp2PkgTokenSpaceGuid.PcdFspHeapSizePercentage ## CONSUMES
gIntelFsp2PkgTokenSpaceGuid.PcdFspMaxInterruptSupported ## CONSUMES
[Ppis]
gEfiTemporaryRamSupportPpiGuid ## PRODUCES

24
IntelFsp2Pkg/FspSecCore/SecMain.c
View File

@ -70,6 +70,7 @@ SecStartup (
UINT32 Index;
FSP_GLOBAL_DATA PeiFspData;
UINT64 ExceptionHandler;
UINTN IdtSize;
//
// Process all libraries constructor function linked to SecCore.
@ -98,13 +99,26 @@ SecStartup (
// | |
// |-------------------|----> TempRamBase
IdtTableInStack.PeiService = NULL;
ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);
for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&ExceptionHandler, sizeof (UINT64));
AsmReadIdtr (&IdtDescriptor);
if ((IdtDescriptor.Base == 0) && (IdtDescriptor.Limit == 0xFFFF)) {
ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);
for (Index = 0; Index < FixedPcdGet8(PcdFspMaxInterruptSupported); Index ++) {
CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&ExceptionHandler, sizeof (UINT64));
}
IdtSize = sizeof (IdtTableInStack.IdtTable);
} else {
if (IdtDescriptor.Limit + 1 > sizeof (IdtTableInStack.IdtTable)) {
//
// ERROR: IDT table size from boot loader is larger than FSP can support, DeadLoop here!
//
CpuDeadLoop();
} else {
IdtSize = IdtDescriptor.Limit + 1;
}
CopyMem ((VOID *) (UINTN) &IdtTableInStack.IdtTable, (VOID *) IdtDescriptor.Base, IdtSize);
}
IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;
IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);
IdtDescriptor.Limit = (UINT16)(IdtSize - 1);
AsmWriteIdtr (&IdtDescriptor);

6
IntelFsp2Pkg/FspSecCore/SecMain.h
View File

@ -1,6 +1,6 @@
/** @file
Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -29,8 +29,6 @@
#include <Library/FspCommonLib.h>
#include <FspEas.h>
#define SEC_IDT_ENTRY_COUNT 34
typedef VOID (*PEI_CORE_ENTRY) ( \
IN CONST EFI_SEC_PEI_HAND_OFF *SecCoreData, \
IN CONST EFI_PEI_PPI_DESCRIPTOR *PpiList \
@ -38,7 +36,7 @@ typedef VOID (*PEI_CORE_ENTRY) ( \
typedef struct _SEC_IDT_TABLE {
EFI_PEI_SERVICES *PeiService;
UINT64 IdtTable[SEC_IDT_ENTRY_COUNT];
UINT64 IdtTable[FixedPcdGet8 (PcdFspMaxInterruptSupported)];
} SEC_IDT_TABLE;
/**

4
IntelFsp2Pkg/IntelFsp2Pkg.dec
View File

@ -86,6 +86,10 @@
# x % of FSP temporary memory will be used for heap
# (100 - x) % of FSP temporary memory will be used for stack
gIntelFsp2PkgTokenSpaceGuid.PcdFspHeapSizePercentage | 50| UINT8|0x10000004
#
# Maximal Interrupt supported in IDT table.
#
gIntelFsp2PkgTokenSpaceGuid.PcdFspMaxInterruptSupported | 34| UINT8|0x10000005
[PcdsFixedAtBuild,PcdsDynamic,PcdsDynamicEx]
gIntelFsp2PkgTokenSpaceGuid.PcdFspReservedMemoryLength |0x00100000|UINT32|0x46530000