From: "Yao, Jiewen" <jiewen.yao@intel.com>
To: "Gonzalez Del Cueto,
Rodrigo" <rodrigo.gonzalez.del.cueto@intel.com>,
"devel@edk2.groups.io" <devel@edk2.groups.io>
Cc: "Wang, Jian J" <jian.j.wang@intel.com>
Subject: Re: [PATCH] SecurityPkg: TPM must go to Idle state on CRB command completion
Date: Fri, 17 Dec 2021 15:09:30 +0000 [thread overview]
Message-ID: <MW4PR11MB58729DB8EAD4C880E8DFF1F48C789@MW4PR11MB5872.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20211217024759.653-1-rodrigo.gonzalez.del.cueto@intel.com>
Pushed ab5ab2f60348138a4b7b1c95ad6f5d0954fb96f1
> -----Original Message-----
> From: Gonzalez Del Cueto, Rodrigo <rodrigo.gonzalez.del.cueto@intel.com>
> Sent: Friday, December 17, 2021 10:48 AM
> To: devel@edk2.groups.io
> Cc: Gonzalez Del Cueto, Rodrigo <rodrigo.gonzalez.del.cueto@intel.com>;
> Wang, Jian J <jian.j.wang@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>
> Subject: [PATCH] SecurityPkg: TPM must go to Idle state on CRB command
> completion
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3463
>
> In V2: Fixed patch format and uncrustify cleanup
>
> In V1: To follow the TCG CRB protocol specification, on every CRB TPM
> command completion the TPM should return to Idle state, regardless of
> the CRB Idle Bypass capability reported by the TPM device.
>
> See: TCG PC Client Device Driver Design Principles for TPM 2.0,
> Version 1.0, Rev 0.27
>
> Signed-off-by: Rodrigo Gonzalez del Cueto
> <rodrigo.gonzalez.del.cueto@intel.com>
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> ---
> SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c | 14 ++------------
> 1 file changed, 2 insertions(+), 12 deletions(-)
>
> diff --git a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
> b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
> index 40ab998004..1d99beaa10 100644
> --- a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
> +++ b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
> @@ -1,7 +1,7 @@
> /** @file
> PTP (Platform TPM Profile) CRB (Command Response Buffer) interface used by
> dTPM2.0 library.
>
> -Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
> Copyright (c), Microsoft Corporation.
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> @@ -320,7 +320,7 @@ PtpCrbTpmCommand (
> // Command completed, but buffer is not enough
> //
> Status = EFI_BUFFER_TOO_SMALL;
> - goto GoReady_Exit;
> + goto GoIdle_Exit;
> }
>
> *SizeOut = TpmOutSize;
> @@ -340,16 +340,6 @@ PtpCrbTpmCommand (
> DEBUG ((DEBUG_VERBOSE, "\n"));
> DEBUG_CODE_END ();
>
> -GoReady_Exit:
> - //
> - // Goto Ready State if command is completed successfully and TPM support
> IdleBypass
> - // If not supported. flow down to GoIdle
> - //
> - if (GetCachedIdleByPass () == 1) {
> - MmioWrite32 ((UINTN)&CrbReg->CrbControlRequest,
> PTP_CRB_CONTROL_AREA_REQUEST_COMMAND_READY);
> - return Status;
> - }
> -
> //
> // Do not wait for state transition for TIMEOUT_C
> // This function will try to wait 2 TIMEOUT_C at the beginning in next call.
> --
> 2.26.2.windows.1
next prev parent reply other threads:[~2021-12-17 15:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 2:47 [PATCH] SecurityPkg: TPM must go to Idle state on CRB command completion Rodrigo Gonzalez del Cueto
2021-12-17 4:23 ` [edk2-devel] " Rodrigo Gonzalez del Cueto
2021-12-17 15:09 ` Yao, Jiewen [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-07-16 21:18 Rodrigo Gonzalez del Cueto
2021-08-09 1:27 ` Yao, Jiewen
2021-10-29 21:33 ` Rodrigo Gonzalez del Cueto
2021-11-04 13:40 ` Yao, Jiewen
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