tree 11d072f13a049c990df5b1511b5bf5d885fb1595
parent 7576224a6434bac0d0f30a0773e7811f53c3b5be
author Arya K Padman <aryakpadman@gmail.com> 1725021692 -0500
committer Arya K Padman <aryakpadman@gmail.com> 1725515498 +0000

PEL: Init PHAL once the PNOR partition symlink is setup

As part of commit 8ae618, PHAL initialization was moved to pelstartup
to avoid multiple initialization calls. However, this change caused an
issue where the phosphor-logging service was pointing to the default
PHAL device tree, which lacks necessary attributes.

Root cause:
At the time the phosphor-logging service starts, the PNOR partition
symlink (which should point to the correct PHAL device tree) is not
yet created. This absence causes phosphor-logging service map to the
default device tree. The underlying issue is that the
openpower-update-bios-attr-table service, responsible for creating all
symlinks, starts after phosphor-logging due to a dependency on
phosphor-logging from a dependent service of
openpower-update-bios-attr-table service..

Proposed solution:
The phosphor-logging service will now subscribe to the 'JobRemoved'
DBUS signal from systemd service after the successful execution of
openpower--update-bios-attr-table service. Upon receiving this signal,
phosphor-logging will init PHAL, ensuring that PHAL initialization
occurs only after all symlinks have been set up.

Tested :

Before fix, journal traces has the error from dtb file open as below:
```
p10b systemd[1]: Starting OpenPower Software Update Manager...
p10b systemd[1]: Starting Phosphor Log Manager...
p10b systemd[1]: Started OpenPower Software Update Manager.
p10b systemd[1]: Started Phosphor Log Manager.
p10b phosphor-log-manager[409]: Unable to open dtb file
        '/var/lib/phosphor-software-manager/pnor/rw/DEVTREE'
p10b systemd[1]: Starting Update BIOS attr table with host
        firmware well-known names...
```

After fix, system is starting able to start the services without dtb
file open error.
```
p10b systemd[1]: Starting Phosphor Log Manager...
p10b phosphor-log-manager[408]: The send PELs to host setting changed
                 to False
p10b systemd[1]: Started Phosphor Log Manager.
p10b systemd[1]: Starting Set POWER host firmware well-known names...
p10b systemd[1]: openpower-process-host-firmware.service: Deactivated
                 successfully.
p10b systemd[1]: Finished Set POWER host firmware well-known names.
p10b systemd[1]: Starting Update BIOS attr table with host firmware
                 well-known names...
p10b systemd[1]: openpower-update-bios-attr-table.service: Deactivated
                 successfully.
p10b systemd[1]: Finished Update BIOS attr table with host firmware
                 well-known names.
```

Change-Id: I96b06581ebbc9afd6f8020f3540ed71bf06e5c19
Signed-off-by: Arya K Padman <aryakpadman@gmail.com>