Hi,Star: Yes,that's what I needed,now I understand the buffer has some restriction. thank you very much! by krishna
At 2018-01-10 17:26:28, "Zeng, Star" <[email protected]> wrote: >The trusted smm communication buffer needs to be allocated as >EfiReservedMemoryType, EfiACPIMemoryNVS, or EfiRuntimeServicesData before >EndOfDxe. >There is a generic smm communication buffer can be used if >MdeModulePkg\Universal\SmmCommunicationBufferDxe is included in dsc and fdf. > >You can refer >https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c#L90 > to know how it be used. > > >Thanks, >Star >-----Original Message----- >From: edk2-devel [mailto:[email protected]] On Behalf Of >krishnaLee >Sent: Wednesday, January 10, 2018 3:44 PM >To: [email protected] >Subject: [edk2] Communicate with soft-smi-handler with uefi-application >question. > >Hi, >I'm learning to write and register some soft-Smi-Handler in smm-mode; then >using QEMU to boot my ovmf.fd,run into uefi shell; then write uefi-application >using EFI_SMM_COMMUNICATION_PROTOCOL to Communicate to my Smi-Handler,but >failed when run my uefi-application,the log show error. >I don't know why,maybe I do not full understand uefi-smm,but how to >communicate to my smi handler? > > >//error-message >[Security] 3rd party image[0] can be loaded after EndOfDxe: >PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x0,0xFFFF,0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\mytestsmm.efi. >InstallProtocolInterface: 5B1B31A1-9562-11D2-8E3F-00A0C969723B 65FC4A8 Loading >driver at 0x000062B0000 EntryPoint=0x000062B10F5 mytestsmm.efi >InstallProtocolInterface: BC62157E-3E33-4FEC-9920-2D3B36D750DF 65FCB10 >ProtectUefiImageCommon - 0x65FC4A8 > - 0x00000000062B0000 - 0x0000000000007000 >InstallProtocolInterface: 752F3136-4E16-4FDC-A22A-E5F46812F4CA 7700CFC >InstallProtocolInterface: 4C8A2451-C207-405B-9694-99EA13251341 62B40B0 Locate >EfiSmmCommunicationProtocol success >SmmIsBufferOutsideSmmValid: Not in ValidCommunicationRegion: Buffer >(0x7700C94) - Length (0x2A), ASSERT [PiSmmCore] >d:\edk2-vudk2017\MdePkg\Library\SmmMemLib\SmmMemLib.c(178): ((BOOLEAN)(0==1)) >//error-message-end > > >//my register-smi-handler code: >//edk2-vUDK2017\MdeModulePkg\Universal\LockBox\SmmLockBox\SmmLockBox.c > >EFI_STATUS > >EFIAPI > >MyTestSmmHandler ( > >IN EFI_HANDLE DispatchHandle, > >IN CONST VOID *Context OPTIONAL, > >IN OUT VOID *CommBuffer OPTIONAL, > >IN OUT UINTN *CommBufferSize OPTIONAL > >) > >{ > >DEBUG ((DEBUG_INFO, "My Test Smm Handler Enter\n")); > >DEBUG ((DEBUG_INFO, "My Test Smm Handler exit\n")); > >return EFI_SUCCESS; > >} > > > > >EFI_STATUS > >EFIAPI > >SmmLockBoxEntryPoint ( > >IN EFI_HANDLE ImageHandle, > >IN EFI_SYSTEM_TABLE *SystemTable > >) > >{... > >//Register My Test Smm handler > >Status = gSmst->SmiHandlerRegister ( > >MyTestSmmHandler, > >&gEfiMyTestSmmGuid, > >&DispatchHandle > >); > >ASSERT_EFI_ERROR (Status); > >... > >} > > > >//the uefi-application code >EFI_STATUS >EFIAPI >UefiMain ( >IN EFI_HANDLE ImageHandle, >IN EFI_SYSTEM_TABLE *SystemTable >) >{ >EFI_STATUS Status; >EFI_SMM_COMMUNICATION_PROTOCOL *mSmmCommunication; EFI_SMM_COMMUNICATE_HEADER >*SmmCommunicateHeader; >UINT8 *buffer; >UINTN bufferSize; > > >bufferSize=sizeof(EFI_SMM_COMMUNICATE_HEADER)*2; >gBS->AllocatePool (EfiRuntimeServicesData,bufferSize,&buffer); >if(buffer==NULL) >{ >Print(L"EFI_OUT_OF_RESOURCES, return\n"); return EFI_OUT_OF_RESOURCES; } > > >SmmCommunicateHeader=(EFI_SMM_COMMUNICATE_HEADER*)buffer; >CopyGuid(&SmmCommunicateHeader->HeaderGuid,&gEfiMyTestSmmGuid); >SmmCommunicateHeader->MessageLength=sizeof(EFI_SMM_COMMUNICATE_HEADER); > > >Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID >**) &mSmmCommunication); >if(Status==EFI_SUCCESS) >{ >Print(L"Locate EfiSmmCommunicationProtocol success\n"); }else { Print(L"Locate >EfiSmmCommunicationProtocol failed return\n"); return EFI_SUCCESS; } > > >Status=mSmmCommunication->Communicate(mSmmCommunication,&buffer,&bufferSize); >if(Status==EFI_SUCCESS) >{ >Print(L"Communication success\n"); >}else >{ >Print(L"Communication failed\n"); >return EFI_SUCCESS; >} > > >gBS->FreePool(buffer); > > >return EFI_SUCCESS; >} > > >any help will be appreciated! >by krishna > >_______________________________________________ >edk2-devel mailing list >[email protected] >https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
