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- Redfish Host Interface
Re: Redfish Host Interface
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From: Russell Peterson [mailto:russell@...]
Sent: Monday, March 15, 2021 7:42 PM
To: email@example.com; Chang, Abner (HPS SW/FW Technologist)
<abner.chang@...>; Laszlo Ersek <lersek@...>
Cc: Wang, Nickle (HPS SW) <nickle.wang@...>
Subject: RE: [edk2-discuss] Redfish Host Interface
Thanks for the response Laszlo and Abner. Very much appreciated.
Do I understand correctly that if I have a BMC with the proper schema for my
system UEFI, when the system boots it (UEFI) will fetch data from the BMC
via the Redfish host interface and that data would in effect, "take priority"
over the data stored in the UPVS? I mean not only for boot order but also
any other configuration data?
Not quite sure what is UPVS stands for.
You are right, not only the boot order but also other properties defined in schema. Map HII to Redfish property using EFI keyword is the phase 2 plan for edk2.
I assume UEFI has some type of discovery mechanism and authentication
mechanism to find and use the BMC Redfish data. From what I have read
this seems to be the case.
Yes, the discovery mechanism for Redfish service is over Redfish HI or SSDP. Platform library has to provide the library to edk2 Redfish core code to build up SMBIOS type 42 table, and the library for acquiring Redfish credential which is OEM implementation-specific.
You can refer to below link for detail information,https://github.com/tianocore/edk2-staging/tree/UEFI_Redfish
, few diagrams and descriptions may out of date but not too far from the implementation on edk2.
We still in the progress of contributing edk2 Redfish foundation code. It is almost there, we can finish this phase 1 work once UEFI spec 2.9 is released because there are some spec updates for EFI Redfish Discover Protocol.
After edk2 Redfish foundation, we will start to contribute edk2 Redfish client code. That is what I mentioned to map HII (BIOS configuration) to Redfish property for the remote management.
From: firstname.lastname@example.org <email@example.com> On Behalf Of
Abner Chang via groups.io
Sent: Sunday, March 14, 2021 9:24 PM
To: Laszlo Ersek <lersek@...>; Russell Peterson
Cc: firstname.lastname@example.org; Wang, Nickle (HPS SW)
Subject: Re: [edk2-discuss] Redfish Host Interface
From: Laszlo Ersek [mailto:lersek@...]
Sent: Saturday, March 13, 2021 6:11 AM
Cc: email@example.com; Chang, Abner (HPS SW/FW Technologist)
<abner.chang@...>; Wang, Nickle (HPS SW)
Subject: Re: [edk2-discuss] Redfish Host InterfaceOS.
On 03/11/21 22:02, Russell Peterson wrote:
I am interested in a UEFI Redfish Host Interface that does not require an
Redfish Host Interface is built for OS to communicate with Redfish service on
either BMC or out-of-band service (I don’t see this use case yet). UEFI use
case is similar to how OS communicates with Redfish service through Redfish
That is, the Redfish service would be provided by UEFI itself (via anThis is interesting , however you will need edk2 web server and the
IP interface)... or perhaps an EFI application.
implementation of Redfish service on edk2 as well. Not sure how this use
case works for OS <-> in-band Redfish service on edk2. Or you just would like
to build up an stand along Redfish service on edk2 and other Redfish clients
can connect to it?
Redfish HI just provides the Redfish information to Redfish clients, the
For example, if a BMC wanted to access EFI variables directly froman IP interface with no functional OS present.
majority users are OS and firmware. Client sends the request to service for
the property through HTTP. Rare use cases that service asks client for
something on its own initiative, Redfish event service is one of the service-
to-client action however client has to registers even first.
So BMC accesses to EFI variable through Redfish HI seems to me not an use
case of generic Redfish services.
idea... but I would need to do some work?
Is this crazy for me to think this? Already exists? Under
At least the following TianoCore bugzilla
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Z9S2NrOzp1mB8LD4F83t22B1dBuQqeIcseTXQYQ&e= > tickets relate toLaszlo, thanks for providing below information.
RedFish, one way or
At least the following USWG Mantis tickets relate to RedFish:
In UEFI v2.8B, there is a chapter called "31 - EFI Redfish Service Support".
A top-level RedfishPkg exists in edk2, and it seems like EmulatorPkg
has received some enablement. Not sure about the state in
edk2-platforms (or in other out-of-tree platforms).
Adding Abner and Nickle to the CC list (per "Maintainers.txt");
hopefully they can summarize the status for you.
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