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efi: add ovmf debug log driver

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Recent OVMF versions (edk2-stable202508 + newer) can write their debug
log to a memory buffer.  This driver exposes the log content via sysfs
(/sys/firmware/efi/ovmf_debug_log).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Gerd Hoffmann 2025-07-08 14:56:23 +02:00 • committed by Ard Biesheuvel
commit f393a76176
5 changed files with 132 additions and 0 deletions
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