efi: add API doc entry for ovmf_debug_log

Document the newly added sysfs ABI for accessing the in-memory debug log
provided by OVMF EFI firmware (when enabled)

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/Documentation/ABI/testing/sysfs-firmware-efi b/Documentation/ABI/testing/sysfs-firmware-efi
index 5e4d0b27cdfe00707e29a836c7c48ff6a0a48e5b..927e362d49747ce2a598f2b07d1a60c0fe9b7152 100644 (file)
--- a/Documentation/ABI/testing/sysfs-firmware-efi
+++ b/Documentation/ABI/testing/sysfs-firmware-efi
@@ -36,3 +36,10 @@ Description: Displays the content of the Runtime Configuration Interface
                Table version 2 on Dell EMC PowerEdge systems in binary format
 Users:         It is used by Dell EMC OpenManage Server Administrator tool to
                populate BIOS setup page.
+
+What:          /sys/firmware/efi/ovmf_debug_log
+Date:          July 2025
+Contact:       Gerd Hoffmann <kraxel@redhat.com>, linux-efi@vger.kernel.org
+Description:   Displays the content of the OVMF debug log buffer.  The file is
+               only present in case the firmware supports logging to a memory
+               buffer.