diff options
| author | Martyn Welch <[email protected]> | 2024-10-09 14:15:38 +0100 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2024-10-15 10:24:27 -0600 |
| commit | d2faad3ff31f0fab0cf280c05ee333992f7a7d27 (patch) | |
| tree | db4686097e1a44fb9717dc4ab0c79916a896c684 /doc | |
| parent | d2061828a4c1b60b44cd2307b6a782ac2efbffbe (diff) | |
boot: pxe_utils: Add fallback support
When configured correctly, we can detect when boot fails after the boot
process has been handed over to the kernel through the use of U-Boot's
bootcount support. In some instances, such as when we are performing
atomic updates via a system such as OSTree, it is desirable to provide a
fallback option so that we can return to a previous (hopefully working)
state.
Add a "fallback" option to the supported extlinux configuration options
that points to a label like "default" so that we can utilise this in
later commits.
Signed-off-by: Martyn Welch <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.pxe | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/README.pxe b/doc/README.pxe index 172201093d0..af2e64a5776 100644 --- a/doc/README.pxe +++ b/doc/README.pxe @@ -120,6 +120,11 @@ Unrecognized commands are ignored. default <label> - the label named here is treated as the default and is the first label 'pxe boot' attempts to boot. +fallback <label> - the label named here is treated as a fallback option that + may be attempted should it be detected that booting of + the default has failed to complete, for example via + U-Boot's boot count limit functionality. + menu title <string> - sets a title for the menu of labels being displayed. menu include <path> - use tftp to retrieve the pxe file at <path>, which |