Package the ability to log kernel crashes to 'ramoops' pstore
files into RAM in /sys/fs/pstore
Reference to the ramoops admin guide in upstream Linux:
https://www.kernel.org/doc/html/v5.10/admin-guide/ramoops.html
The files in RAM survive a warm reboot, but not a cold reboot.
Note: kmod-ramoops selects kmod-pstore and kmod-reed-solomon.
The feature can be used by selecting the kmod-ramoops and
adding a ramoops reserved-memory definition to the device DTS.
Example from R7800:
reserved-memory {
rsvd@5fe00000 {
reg = <0x5fe00000 0x200000>;
reusable;
};
ramoops@42100000 {
compatible = "ramoops";
reg = <0x42100000 0x40000>;
record-size = <0x4000>;
console-size = <0x4000>;
ftrace-size = <0x4000>;
pmsg-size = <0x4000>;
};
};
If no definition has been made in DTS, no crash log is stored
for the device.
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
(added CONFIG_EFI_VARS_PSTORE disable)
97158fe10e