Jiewen, "xxx_DEVICE_IDENTIFIER_TYPE_xxx" sounds a bit strange to me because I feel "IDENTIFIER" and "TYPE" are different properties to describe a device. Or you think some other GUIDs may be defined in future as the device ID?
Thanks, Ray > -----Original Message----- > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Ni, Ray > Sent: Thursday, November 7, 2019 9:59 AM > To: Yao, Jiewen <jiewen....@intel.com>; devel@edk2.groups.io > Cc: Wang, Jian J <jian.j.w...@intel.com>; Wu, Hao A <hao.a...@intel.com>; > Lou, Yun <yun....@intel.com> > Subject: Re: [edk2-devel] [PATCH V2 2/4] MdeModulePkg/Include: Add > DeviceSecurity.h > > I see. PciIo or UsbIo instance is installed with a different GUID and consumer > needs to parse the device path to understand what kind of instance (PciIo or > UsbIo) should be used. > > > -----Original Message----- > > From: Yao, Jiewen <jiewen....@intel.com> > > Sent: Wednesday, November 6, 2019 4:25 PM > > To: Ni, Ray <ray...@intel.com>; devel@edk2.groups.io > > Cc: Wang, Jian J <jian.j.w...@intel.com>; Wu, Hao A > > <hao.a...@intel.com>; Lou, Yun <yun....@intel.com> > > Subject: RE: [edk2-devel] [PATCH V2 2/4] MdeModulePkg/Include: Add > > DeviceSecurity.h > > > > HI > > Good comment. Let me answer it in 2 parts. > > > > 1) The consumer may locate the deice path to know the device type. In > > this part, you can treat this as redundant information. > > > > 2) But we still need a new GUID, because I will install the device > > access protocol on this new GUID for the temporary access for the > authentication driver only. > > > > I don't want to install the device access protocol to the original > > UEFI spec defined GUID to notify everyone that the device is ready to > > use, because I have seen some device drivers have callback function (such > as ATA passthru, or NVME passthru) to start access the device once the > device access protocol is installed. > > > > > > Thank you > > Yao Jiewen > > > > > -----Original Message----- > > > From: Ni, Ray <ray...@intel.com> > > > Sent: Wednesday, November 6, 2019 3:56 PM > > > To: devel@edk2.groups.io; Yao, Jiewen <jiewen....@intel.com> > > > Cc: Wang, Jian J <jian.j.w...@intel.com>; Wu, Hao A > > > <hao.a...@intel.com>; Lou, Yun <yun....@intel.com> > > > Subject: RE: [edk2-devel] [PATCH V2 2/4] MdeModulePkg/Include: Add > > > DeviceSecurity.h > > > > > > > + /// > > > > + /// Type of the device. > > > > + /// This field is also served as a device Access protocol GUID. > > > > + /// The device access protocol is installed on the DeviceHandle. > > > > + /// The device access protocol is device specific. > > > > + /// EDKII_DEVICE_IDENTIFIER_TYPE_PCI_GUID means the device > access > > > protocol is PciIo. > > > > + /// EDKII_DEVICE_IDENTIFIER_TYPE_USB_GUID means the device > access > > > protocol is UsbIo. > > > > + /// > > > > + EFI_GUID DeviceType; > > > > > > Do we still need DeviceType? Consumer can query the Handle to > > > understand the device type. > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#50161): https://edk2.groups.io/g/devel/message/50161 Mute This Topic: https://groups.io/mt/40117495/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
