diff options
Diffstat (limited to 'kernel/kexec_handover.c')
| -rw-r--r-- | kernel/kexec_handover.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/kernel/kexec_handover.c b/kernel/kexec_handover.c index 555488eb1a18..5083c68c3a4e 100644 --- a/kernel/kexec_handover.c +++ b/kernel/kexec_handover.c @@ -988,6 +988,26 @@ static const void *kho_get_fdt(void) } /** + * is_kho_boot - check if current kernel was booted via KHO-enabled + * kexec + * + * This function checks if the current kernel was loaded through a kexec + * operation with KHO enabled, by verifying that a valid KHO FDT + * was passed. + * + * Note: This function returns reliable results only after + * kho_populate() has been called during early boot. Before that, + * it may return false even if KHO data is present. + * + * Return: true if booted via KHO-enabled kexec, false otherwise + */ +bool is_kho_boot(void) +{ + return !!kho_get_fdt(); +} +EXPORT_SYMBOL_GPL(is_kho_boot); + +/** * kho_retrieve_subtree - retrieve a preserved sub FDT by its name. * @name: the name of the sub FDT passed to kho_add_subtree(). * @phys: if found, the physical address of the sub FDT is stored in @phys. @@ -1269,7 +1289,7 @@ int kho_fill_kimage(struct kimage *image) int err = 0; struct kexec_buf scratch; - if (!kho_enable) + if (!kho_out.finalized) return 0; image->kho.fdt = page_to_phys(kho_out.ser.fdt); |