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Redesign survivability mode to have only one value per file. 1) Retain the survivability_mode sysfs to indicate the type cat /sys/bus/pci/devices/0000\:03\:00.0/survivability_mode (Boot / Runtime) 2) Add survivability_info directory to expose boot breadcrumbs. Entries in survivability mode sysfs are only visible when boot breadcrumb registers are populated. /sys/bus/pci/devices/0000:03:00.0/survivability_info ├── aux_info0 ├── aux_info1 ├── aux_info2 ├── aux_info3 ├── aux_info4 ├── capability_info ├── postcode_trace └── postcode_trace_overflow Capability Info: Provides data about boot status and has bits that indicate the support for the other breadcrumbs Postcode Trace / Postcode Trace Overflow : Each postcode is represented as an 8-bit value and represents a boot failure event. When a new failure event is logged by Pcode the existing postcodes are shifted left. These entries provide a history of 8 postcodes. Auxiliary Info: Some failures have additional debug information. Signed-off-by: Riana Tauro <riana.tauro@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patch.msgid.link/20251208084539.3652902-5-riana.tauro@intel.com Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>