Re: [PATCH 00/13] Extend and fix the TCG/TCG2 Physical Presence Interface

["Gao, Zhichao" <zhichao.gao@intel.com>]

See below.

> -----Original Message-----
> From: Yao, Jiewen
> Sent: Friday, January 3, 2020 11:09 AM
> To: Gao, Zhichao <zhichao.gao@intel.com>; devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Zhang, Chao B
> <chao.b.zhang@intel.com>; Justen, Jordan L <jordan.l.justen@intel.com>;
> Laszlo Ersek <lersek@redhat.com>; Ard Biesheuvel
> <ard.biesheuvel@linaro.org>; Marc-André Lureau
> <marcandre.lureau@redhat.com>; Stefan Berger <stefanb@linux.ibm.com>
> Subject: RE: [PATCH 00/13] Extend and fix the TCG/TCG2 Physical Presence
> Interface
> 
> Hi
> I am not clear on the purpose of this extension.
> 
> The Bugzilla just describes the solution.
> But what is the problem you are trying to resolve?
> 
> I completely don’t understand.
> 
> Please do consider add the background information there.
> Or it is hard for me to comment.
> 
> 
> Thank you
> Yao Jiewen
> 
> > -----Original Message-----
> > From: Gao, Zhichao <zhichao.gao@intel.com>
> > Sent: Friday, January 3, 2020 11:04 AM
> > To: devel@edk2.groups.io
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Wang, Jian J
> > <jian.j.wang@intel.com>; Zhang, Chao B <chao.b.zhang@intel.com>;
> > Justen, Jordan L <jordan.l.justen@intel.com>; Laszlo Ersek
> > <lersek@redhat.com>; Ard Biesheuvel <ard.biesheuvel@linaro.org>;
> > Marc-André Lureau <marcandre.lureau@redhat.com>; Stefan Berger
> > <stefanb@linux.ibm.com>
> > Subject: [PATCH 00/13] Extend and fix the TCG/TCG2 Physical Presence
> > Interface
> >
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2443
> >
> > 1. Add two interfaces Tcg2PpVendorLibExecutePendingRequestEx and
> > Tcg2PpVendorLibSubmitRequestToPreOSFunctionEx to Tcg2PpVendorLib. It
> > has one more parameter PPData (type EFI_TCG2_PHYSICAL_PRESENCE) to
> > transfer more data.
> > 2. Use the Ex version instead of original one in
> > Tcg2PhysicalPresenceLib 3. Add a pcd
> > PcdPhysicalPresenceUserConfirmTimeout to control the user confirm
> > input key timeout.
> > 4. Add FunctionIndex to structure type EFI_TCG2_PHYSICAL_PRESENCE to
> > transfer
> > mTcgNvs->PhysicalPresence.Parameter data.
> > 5. Add parameter FunctionIndex to
> > Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunctionEx
> > to initialize the PPdata.

Background:
Some platforms implement their own Tcg2PpVendorLib and want to operate with more parameters.

#1-#2 and #4-#5 changes aim to add extend the interface with PPdata. PPdata pointer can transfer most of the required parameter to do the operation.
All the extend changes is for the PPdata and transfer to the platform implemented interfaces. This would affect the platforms which implement their own Tcg2PpVendorLib.
But for open source platform, I didn't see any implementation of it.

#3 aims to add a pcd to let the customers to decide whether to wait for the input forever or with a timeout count.

> > 6. Move Tcg2ConfigNvData.h from SecurityPkg/Tcg/Tcg2Config to
> > SecurityPkg/Include.
> > It is useful for platform code to implement their own Tcg2PhysicalPresenceLib.

#6 is a movement to decrease the duplicated code at platform side if the platform code implement its own TCG library or driver.

> > 7. Replace the ASSERT with error code return in TpmPhysicalPresenceLib

#7 aims to remove the ASSERT because it is not critical. ASSERT when fail to call TpmPhysicalPresence and GetTpmCapability is not a good behavior.

> > 8. Fix one operation
> > (PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE) flow of
> > TcgPhysicalPresenceLib (refer to Physical Presence Interface Spec Page 37).

#8 is a bug fix to follow the spec.

Thanks,
Zhichao

> >
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Jian J Wang <jian.j.wang@intel.com>
> > Cc: Chao Zhang <chao.b.zhang@intel.com>
> > Cc: Jordan Justen <jordan.l.justen@intel.com>
> > Cc: Laszlo Ersek <lersek@redhat.com>
> > Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> > Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
> > Cc: Stefan Berger <stefanb@linux.ibm.com>
> > Signed-off-by: Zhichao Gao <zhichao.gao@intel.com> Zhichao Gao (13):
> >   SecurityPkg/Tcg2PpVerndorLib: Add two Ex function to handle PPdata
> >   SecurityPkg/Tcg2PpVendorLib: Add implementation of new Ex function
> >   SecurityPkg/Tcg2PhysicalPresenceLib: Use the new Ex function
> >   SecurityPkg/SmmTcg2PhysicalPresenceLib: Use the new Ex function
> >   SecurityPkg/dec: Add a pcd for user response wait time
> >   OvmfPkg/Tcg2PhysicalPresenceLib: Use pcd for user response wait time
> >   SecurityPkg/Tcg2PhysicalPresenceLib: Use Pcd for user resp wait time
> >   SecurityPkg/TcgPyhsicalPresenceLib: Use Pcd for user resp wait time
> >   SecurityPkg/Tcg2PhysicalPresenceData.h: Add FunctionIndex for PPdata
> >   SecurityPkg/Tcg2PhysicalPresenceLib: Extend the submit preOS func
> >   SecurityPkg: Move the Tcg2ConfigNvData.h to Include folder
> >   SecurityPkg/TcgPhysicalPresenceLib: Replace the ASSERT with error code
> >   SecurityPkg/TcgPhysicalPresenceLib: Fix the operation of 11
> >
> >  .../DxeTcg2PhysicalPresenceLib.c              |  63 +++++++---
> >  .../DxeTcg2PhysicalPresenceLib.inf            |   6 +-
> >  .../Include/Guid/Tcg2PhysicalPresenceData.h   |   3 +-
> >  .../Include/Library/Tcg2PhysicalPresenceLib.h |   4 +-
> >  SecurityPkg/Include/Library/Tcg2PpVendorLib.h |  54 ++++++++-
> >  .../Tcg2Config => Include}/Tcg2ConfigNvData.h |   2 +-
> >  .../DxeTcg2PhysicalPresenceLib.c              |  68 ++++++++---
> >  .../DxeTcg2PhysicalPresenceLib.inf            |   4 +-
> >  .../DxeTcgPhysicalPresenceLib.c               | 110 ++++++++++++------
> >  .../DxeTcgPhysicalPresenceLib.inf             |   6 +-
> >  .../SmmTcg2PhysicalPresenceLib.c              |  15 ++-
> >  .../Tcg2PpVendorLibNull/Tcg2PpVendorLibNull.c |  61 +++++++++-
> >  SecurityPkg/SecurityPkg.dec                   |   7 +-
> >  SecurityPkg/SecurityPkg.uni                   |   7 +-
> >  SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr     |   4 +-
> >  SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDxe.inf  |   3 +-
> >  SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.h   |   4 +-
> >  SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigPei.inf  |   3 +-
> >  SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigPeim.c   |   4 +-
> >  SecurityPkg/Tcg/Tcg2Config/TpmDetection.c     |   4 +-
> >  SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c             |  10 +-
> >  21 files changed, 347 insertions(+), 95 deletions(-)  rename
> > SecurityPkg/{Tcg/Tcg2Config => Include}/Tcg2ConfigNvData.h (94%)
> >
> > --
> > 2.21.0.windows.1