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doc: rework doc/mkeficapsule.1

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* Indicate the location of the directory for EFI capsules.
* Improve the readability.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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Heinrich Schuchardt 2023-01-22 11:27:10 +01:00
parent f4ece689db
commit a13b92ae6f
1 changed files with 11 additions and 10 deletions
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doc/mkeficapsule.1
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@ -11,22 +11,23 @@ mkeficapsule \- Generate EFI capsule file for U-Boot
.RI [ options ] " " [ image-blob ] " " capsule-file .RI [ options ] " " [ image-blob ] " " capsule-file
.SH "DESCRIPTION" .SH "DESCRIPTION"
The
.B mkeficapsule .B mkeficapsule
command is used to create an EFI capsule file for use with the U-Boot command is used to create an EFI capsule file to be used by U-Boot for firmware
EFI capsule update. updates.
A capsule file may contain various type of firmware blobs which A capsule file may contain various types of firmware blobs which are to be
are to be applied to the system and must be placed in the specific applied to the system.
directory on the UEFI system partition. If a capsule file is placed in the /EFI/CapusuleUpdate directory of the EFI
An update will be automatically executed at next reboot. system partition, U-Boot will try to execute the update at the next reboot.
Optionally, a capsule file can be signed with a given private key. Optionally, a capsule file can be signed with a given private key.
In this case, the update will be authenticated by verifying the signature In this case, the update will be authenticated by verifying the signature
before applying. before applying.
Additionally, an empty capsule file can be generated for acceptance or Additionally, an empty capsule file can be generated to indicate the acceptance
rejection of firmware images by a governing component like an Operating or rejection of firmware images by a governing component like an operating
System. The empty capsules do not require an image-blob input file. system.
Empty capsules do not require an image-blob input file.
.B mkeficapsule .B mkeficapsule
takes any type of image files when generating non empty capsules, including: takes any type of image files when generating non empty capsules, including: