diff options
Diffstat (limited to 'MdePkg/Library/SmmMemLib/SmmMemLib.c')
| -rw-r--r-- | MdePkg/Library/SmmMemLib/SmmMemLib.c | 180 |
1 files changed, 179 insertions, 1 deletions
diff --git a/MdePkg/Library/SmmMemLib/SmmMemLib.c b/MdePkg/Library/SmmMemLib/SmmMemLib.c index 420c5a755f..b4e3156cb4 100644 --- a/MdePkg/Library/SmmMemLib/SmmMemLib.c +++ b/MdePkg/Library/SmmMemLib/SmmMemLib.c @@ -6,7 +6,7 @@ all SMRAM range via SMM_ACCESS2_PROTOCOL, including the range for firmware (like SMM Core
and SMM driver) and/or specific dedicated hardware.
- Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2015 - 2016, 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
@@ -28,6 +28,11 @@ #include <Library/SmmServicesTableLib.h>
#include <Library/HobLib.h>
#include <Protocol/SmmAccess2.h>
+#include <Protocol/SmmReadyToLock.h>
+#include <Protocol/SmmEndOfDxe.h>
+
+#define NEXT_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \
+ ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) + (Size)))
EFI_SMRAM_DESCRIPTOR *mSmmMemLibInternalSmramRanges;
UINTN mSmmMemLibInternalSmramCount;
@@ -37,6 +42,15 @@ UINTN mSmmMemLibInternalSmramCount; //
EFI_PHYSICAL_ADDRESS mSmmMemLibInternalMaximumSupportAddress = 0;
+UINTN mMemoryMapEntryCount;
+EFI_MEMORY_DESCRIPTOR *mMemoryMap;
+UINTN mDescriptorSize;
+
+VOID *mRegistrationEndOfDxe;
+VOID *mRegistrationReadyToLock;
+
+BOOLEAN mSmmReadyToLock = FALSE;
+
/**
Calculate and save the maximum support address.
@@ -137,6 +151,34 @@ SmmIsBufferOutsideSmmValid ( }
}
+ //
+ // Check override for Valid Communication Region
+ //
+ if (mSmmReadyToLock) {
+ EFI_MEMORY_DESCRIPTOR *MemoryMap;
+ BOOLEAN InValidCommunicationRegion;
+
+ InValidCommunicationRegion = FALSE;
+ MemoryMap = mMemoryMap;
+ for (Index = 0; Index < mMemoryMapEntryCount; Index++) {
+ if ((Buffer >= MemoryMap->PhysicalStart) &&
+ (Buffer + Length <= MemoryMap->PhysicalStart + LShiftU64 (MemoryMap->NumberOfPages, EFI_PAGE_SHIFT))) {
+ InValidCommunicationRegion = TRUE;
+ }
+ MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mDescriptorSize);
+ }
+
+ if (!InValidCommunicationRegion) {
+ DEBUG ((
+ EFI_D_ERROR,
+ "SmmIsBufferOutsideSmmValid: Not in ValidCommunicationRegion: Buffer (0x%lx) - Length (0x%lx), ",
+ Buffer,
+ Length
+ ));
+ ASSERT (FALSE);
+ return FALSE;
+ }
+ }
return TRUE;
}
@@ -277,6 +319,128 @@ SmmSetMem ( }
/**
+ Notification for SMM EndOfDxe protocol.
+
+ @param[in] Protocol Points to the protocol's unique identifier.
+ @param[in] Interface Points to the interface instance.
+ @param[in] Handle The handle on which the interface was installed.
+
+ @retval EFI_SUCCESS Notification runs successfully.
+**/
+EFI_STATUS
+EFIAPI
+SmmLibInternalEndOfDxeNotify (
+ IN CONST EFI_GUID *Protocol,
+ IN VOID *Interface,
+ IN EFI_HANDLE Handle
+ )
+{
+ EFI_STATUS Status;
+ UINTN MapKey;
+ UINTN MemoryMapSize;
+ EFI_MEMORY_DESCRIPTOR *MemoryMap;
+ EFI_MEMORY_DESCRIPTOR *MemoryMapStart;
+ EFI_MEMORY_DESCRIPTOR *SmmMemoryMapStart;
+ UINTN MemoryMapEntryCount;
+ UINTN DescriptorSize;
+ UINT32 DescriptorVersion;
+ UINTN Index;
+
+ MemoryMapSize = 0;
+ MemoryMap = NULL;
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ MemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ ASSERT (Status == EFI_BUFFER_TOO_SMALL);
+
+ do {
+ Status = gBS->AllocatePool (EfiBootServicesData, MemoryMapSize, (VOID **)&MemoryMap);
+ ASSERT (MemoryMap != NULL);
+
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ MemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->FreePool (MemoryMap);
+ }
+ } while (Status == EFI_BUFFER_TOO_SMALL);
+
+ //
+ // Get Count
+ //
+ mDescriptorSize = DescriptorSize;
+ MemoryMapEntryCount = MemoryMapSize/DescriptorSize;
+ MemoryMapStart = MemoryMap;
+ mMemoryMapEntryCount = 0;
+ for (Index = 0; Index < MemoryMapEntryCount; Index++) {
+ switch (MemoryMap->Type) {
+ case EfiReservedMemoryType:
+ case EfiRuntimeServicesCode:
+ case EfiRuntimeServicesData:
+ case EfiACPIMemoryNVS:
+ mMemoryMapEntryCount++;
+ break;
+ }
+ MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
+ }
+ MemoryMap = MemoryMapStart;
+
+ //
+ // Get Data
+ //
+ mMemoryMap = AllocatePool (mMemoryMapEntryCount*DescriptorSize);
+ ASSERT (mMemoryMap != NULL);
+ SmmMemoryMapStart = mMemoryMap;
+ for (Index = 0; Index < MemoryMapEntryCount; Index++) {
+ switch (MemoryMap->Type) {
+ case EfiReservedMemoryType:
+ case EfiRuntimeServicesCode:
+ case EfiRuntimeServicesData:
+ case EfiACPIMemoryNVS:
+ CopyMem (mMemoryMap, MemoryMap, DescriptorSize);
+ mMemoryMap = NEXT_MEMORY_DESCRIPTOR(mMemoryMap, DescriptorSize);
+ break;
+ }
+ MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
+ }
+ mMemoryMap = SmmMemoryMapStart;
+ MemoryMap = MemoryMapStart;
+
+ gBS->FreePool (MemoryMap);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Notification for SMM ReadyToLock protocol.
+
+ @param[in] Protocol Points to the protocol's unique identifier.
+ @param[in] Interface Points to the interface instance.
+ @param[in] Handle The handle on which the interface was installed.
+
+ @retval EFI_SUCCESS Notification runs successfully.
+**/
+EFI_STATUS
+EFIAPI
+SmmLibInternalReadyToLockNotify (
+ IN CONST EFI_GUID *Protocol,
+ IN VOID *Interface,
+ IN EFI_HANDLE Handle
+ )
+{
+ mSmmReadyToLock = TRUE;
+ return EFI_SUCCESS;
+}
+/**
The constructor function initializes the Smm Mem library
@param ImageHandle The firmware allocated handle for the EFI image.
@@ -319,6 +483,18 @@ SmmMemLibConstructor ( //
SmmMemLibInternalCalculateMaximumSupportAddress ();
+ //
+ // Register EndOfDxe to get UEFI memory map
+ //
+ Status = gSmst->SmmRegisterProtocolNotify (&gEfiSmmEndOfDxeProtocolGuid, SmmLibInternalEndOfDxeNotify, &mRegistrationEndOfDxe);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Register ready to lock so that we can know when to check valid SMRAM region
+ //
+ Status = gSmst->SmmRegisterProtocolNotify (&gEfiSmmReadyToLockProtocolGuid, SmmLibInternalReadyToLockNotify, &mRegistrationReadyToLock);
+ ASSERT_EFI_ERROR (Status);
+
return EFI_SUCCESS;
}
@@ -339,5 +515,7 @@ SmmMemLibDestructor ( {
FreePool (mSmmMemLibInternalSmramRanges);
+ gSmst->SmmRegisterProtocolNotify (&gEfiSmmEndOfDxeProtocolGuid, NULL, &mRegistrationEndOfDxe);
+ gSmst->SmmRegisterProtocolNotify (&gEfiSmmReadyToLockProtocolGuid, NULL, &mRegistrationReadyToLock);
return EFI_SUCCESS;
}
|