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ppc/pnv: Add a default formatted PNOR image

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The default PNOR image is erased and not recognised by skiboot, so NVRAM
gets disabled. This change adds a tiny pnor file that is a proper FFS
image with a formatted NVRAM partition. This is recognised by skiboot and
will persist across machine reboots.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2025-03-01 01:07:57 +10:00
parent 4c84a0a4a6
commit 80f9321308
6 changed files with 37 additions and 1 deletions
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7
docs/system/ppc/powernv.rst
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@ -195,6 +195,13 @@ Use a MTD drive to add a PNOR to the machine, and get a NVRAM :
-drive file=./witherspoon.pnor,format=raw,if=mtd
If no mtd drive is provided, the powernv platform will create a default
PNOR device using a tiny formatted PNOR in pc-bios/pnv-pnor.bin opened
read-only (PNOR changes will be persistent across reboots but not across
invocations of QEMU). If no defaults are used, an erased 128MB PNOR is
provided (which skiboot will probably not recognize since it is not
formatted).
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