Hello Andrew,

On my platform, I am installing Load File protocol on a handle which I do not want to be auto enumerated by boot manager. In order to achieve this, I submitted this match on edk2 side and have installed gEdkiiSkipBmAutoEnumerateProtocolGuid on the same handle to achieve this on platform side. If there is a different way to achieve what I am trying to do, please let me know and I would be happy to adopt that.

Thanks

Ashish

From: afish@apple.com <afish@apple.com>
Sent: Monday, November 4, 2019 10:01 PM
To: devel@edk2.groups.io; Ashish Singhal <ashishsingha@nvidia.com>
Cc: Ni, Ray <ray.ni@intel.com>; Laszlo Ersek <lersek@redhat.com>; Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>; Gao, Zhichao <zhichao.gao@intel.com>; Mike Kinney <michael.d.kinney@intel.com>
Subject: Re: [edk2-devel] [PATCH] Support skipping automatic BM enumeration

On Nov 4, 2019, at 9:24 PM, Ashish Singhal <ashishsingha@nvidia.com> wrote:

Hi Ray,

I did not see any example with which one can tell BDS not to enumerate a boot option. Can you please point me to an example where a protocol (Block IO, Simple FS or Load File) does not get enumerated as a boot option?

Ashish,

Are you asking for example code, or reasons that you would not want to enumerate something as bootable? 

Most likely if you want to have a platform policy to add gEdkiiSkipBmAutoEnumerateProtocolGuid you are going to need an EFI Driver Model driver to add it to the handle based on some platform policy. This is the only way you can filter based on things getting connected at different times during boot. 

Thanks,

Andrew Fish

Thanks
Ashish

-----Original Message-----
From: Ni, Ray <ray.ni@intel.com>
Sent: Monday, November 4, 2019 7:42 PM
To: Laszlo Ersek <lersek@redhat.com>; devel@edk2.groups.io; Ashish Singhal <ashishsingha@nvidia.com>; Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>; Gao, Zhichao <zhichao.gao@intel.com>
Cc: Kinney, Michael D <michael.d.kinney@intel.com>
Subject: RE: [edk2-devel] [PATCH] Support skipping automatic BM enumeration

+ Mike

With the UEFI driver model, if a device is not needed by booting, it can skip the connecting.
Then I do not see a need of the new protocol.

Thanks,
Ray

-----Original Message-----
From: Laszlo Ersek <lersek@redhat.com>
Sent: Thursday, October 31, 2019 6:15 PM
To: devel@edk2.groups.io; ashishsingha@nvidia.com; Wang, Jian J
<jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>; Ni, Ray
<ray.ni@intel.com>; Gao, Zhichao <zhichao.gao@intel.com>
Subject: Re: [edk2-devel] [PATCH] Support skipping automatic BM
enumeration

+Ray, +Zhichao

(although, the actual patch seems to be missing from the posting)

Thanks
Laszlo

On 10/30/19 04:47, Ashish Singhal wrote:

Right now, any and every handle with a BlockIO or SimpleFileSystem
or LoadFile protocol installed on the system is used to enumerate BM
automatically. There may be cases where on a platform, some of these
are not desirable to be enumerated automatically. This patch adds
support for skipping this automatic enumeration if on the same
handle, a new protocol defined as EdkiiSkipBmAutoEnumerate is found
to be

installed.

Ashish Singhal (1):
 MdeModulePkg/UefiBootManagerLib: Support skipping BM enumeration

.../Include/Protocol/SkipBmAutoEnumerate.h         | 25 ++++++++++++++
MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c   | 40

+++++++++++++++++++++-

.../Library/UefiBootManagerLib/InternalBm.h        |  1 +
.../UefiBootManagerLib/UefiBootManagerLib.inf      |  1 +
MdeModulePkg/MdeModulePkg.dec                      |  3 ++
5 files changed, 69 insertions(+), 1 deletion(-)  create mode
100644 MdeModulePkg/Include/Protocol/SkipBmAutoEnumerate.h

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