On Thu, Jul 22, 2021 at 9:59 AM Daniel Schaefer <daniel.schaefer@hpe.com>
wrote:

> On 7/22/21 9:44 AM, Ni, Ray wrote:
> > Cheng-Chieh,
> > Thanks for the detailed explanation in doc
> https://docs.google.com/document/d/1mU6ICHTh0ot8U45uuRENKOGI8cVzizdyWHGYHpEguVg/edit#heading=h.xzptrog8pyxf
> .
> >
> > My original thought was LinuxBoot is a payload that aims to boot OS.
> > But the idea of chaining UefiPayload producing UEFI services is very
> brilliant.
>
> It can be and it is. The main usage of LinuxBoot is to load/boot another
> Linux using the kexec mechanism. But in order to be able to boot
> Windows, ESXI, ... a UEFI interface is required.
> There have been a few proposals and POCs (like implementing UEFI
> services in Linux) but UefiPayload is the most practical and easy way to
> do it, for now.
>
> > Have you considered to produce the universal payload interfaces (
> https://universalpayload.github.io/documentation/ ) from LinuxBoot so no
> LbParseLib is required?
>
> I don't think we've looked at it. But we liked it to be a string because
> it allows easy forward compatibility and not having to recreate the
> structs in higher-level languages like Go.
>
> Agree to Daniel. In the future, we can look for supporting HOB structure
in u-root, but for now, we prefer to stick with the current approach.

--
Cheng-Chieh


> > Thanks,
> > Ray
> >
> >> -----Original Message-----
> >> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of
> Cheng-Chieh Huang via groups.io
> >> Sent: Wednesday, July 21, 2021 9:23 PM
> >> To: devel@edk2.groups.io
> >> Cc: Cheng-Chieh Huang <chengchieh@google.com>; Schaefer, Daniel <
> daniel.schaefer@hpe.com>; Trammell Hudson
> >> <hudson@trmm.net>; Ma, Maurice <maurice.ma@intel.com>; Dong, Guo <
> guo.dong@intel.com>; You, Benjamin
> >> <benjamin.you@intel.com>
> >> Subject: [edk2-devel] [PATCH 0/6] UefiPayloadPkg: LinuxBoot Support in
> UefiPayload
> >>
> >> These are necessary patches to Support LinuxBoot in UefiPayload.
> >> With these paches, we can boot to ESXi and Windows from a linux in QEMU.
> >>
> >> LinuxBoot README:
> >>
> https://github.com/linuxboot/edk2/blob/uefipayload/UefiPayloadPkg/README.md
> >>
> >> PR to tianocore:
> >> https://github.com/tianocore/edk2/pull/1820
> >>
> >> Cheng-Chieh Huang (5):
> >>    Add LINUXBOOT payload target
> >>    Use legacy timer in Linuxboot payload
> >>    Update maximum logic processor to 256
> >>    Reserve Payload config in runtime services data
> >>    Add DISABLE_MMX_SSE to avoid generating floating points operation
> >>
> >> Trammell Hudson (1):
> >>    LinuxBoot: use a text format for the configuration block.
> >>
> >>   UefiPayloadPkg/UefiPayloadPkg.dsc             |  29 +-
> >>   UefiPayloadPkg/UefiPayloadPkg.fdf             |   5 +
> >>   .../Library/LbParseLib/LbParseLib.inf         |  39 ++
> >>   UefiPayloadPkg/Include/Linuxboot.h            |  58 +++
> >>   .../Library/LbParseLib/LbParseLib.c           | 348 ++++++++++++++++++
> >>   .../PciHostBridgeLib/PciHostBridgeSupport.c   |   6 +-
> >>   .../UefiPayloadEntry/UefiPayloadEntry.c       |   2 +
> >>   CryptoPkg/Library/OpensslLib/openssl          |   2 +-
> >>   8 files changed, 480 insertions(+), 9 deletions(-)
> >>   create mode 100644 UefiPayloadPkg/Library/LbParseLib/LbParseLib.inf
> >>   create mode 100644 UefiPayloadPkg/Include/Linuxboot.h
> >>   create mode 100644 UefiPayloadPkg/Library/LbParseLib/LbParseLib.c
> >>
> >> Cc: Cheng-Chieh Huang <chengchieh@google.com>
> >> Cc: Daniel Schaefer <daniel.schaefer@hpe.com>
> >> Cc: Trammell Hudson <hudson@trmm.net>
> >> Cc: Maurice Ma <maurice.ma@intel.com>
> >> Cc: Guo Dong <guo.dong@intel.com>
> >> Cc: Benjamin You <benjamin.you@intel.com>
> >> --
> >> 2.32.0.402.g57bb445576-goog
> >>
> >>
> >>
> >> 
> >>
> >
>