From mboxrd@z Thu Jan  1 00:00:00 1970
From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Mon, 8 Feb 2021 23:18:03 +0100
Subject: [PATCH 1/2] efi: Add ESRT to the EFI system table
In-Reply-To: <20210208125246.32547-2-jose.marinho@arm.com>
References: <20210208125246.32547-1-jose.marinho@arm.com>
 <20210208125246.32547-2-jose.marinho@arm.com>
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On 2/8/21 1:52 PM, Jose Marinho wrote:
> The ESRT is initialised during efi_init_objlist after
> efi_initialize_system_table().
>
> The ESRT is initially created with size for 50 FW image entries.
> The ESRT is resized when it runs out of space. Every resize adds 50
> additional entries.
> The ESRT is populated from information provided by FMP instances only.
>
> Signed-off-by: Jose Marinho<jose.marinho@arm.com>


<josem> one limitation is, if any FMP instance is installed and then
uninstalled during the same boottime flow, the ESRT entries will not be
removed
<josem> this limitation is because I cannot find a proper UEFI way to
hook to a FMP protocol uninstall.
<xypron> register an event with RegisterProtocolNotify().
<xypron> EFI_CALL(efi_register_protocol_notify(...)) after exporting the
function in /include/efi_loader
<xypron> The event can be created with efi_create_event().