- Enable ARCH_BCM2835
- Enable USB_NET_SMSC95XX.
- Compile in MII and USB_USBNET. These are needed
by the onboard network driver
- Enable the DWC2 USB controller.
- Enabled MMC, MMC_SDHCI, MMC_BCM2835 for SD card access
- Enable various BCM2835 platform devices: HW_RANDOM_BCM2835,
I2C_BCM2835, PINCTRL_BCM2835, DMA_BCM2835,BCM2835_MBOX,
WM_BCM2835, ...
- Enable SERIAL_8250 and friends.
- Enable FB_SIMPLE to get console output
The above configuration gives a minimal working system
with serial console access (via the GPIO pins), networking
and SD storage. The smsc95xx network driver does not
seem to get autoloaded. This is likely a mdev issue.
We specifically do not configure any WLAN,
sound or graphics drivers as they would pull in
too many other cruft into the kernel. To enable
these we consider adding a -rpi3 config similar
to the -dbg config to provide additional kernel
config options.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This is a useful read only filesystem for images that is efficient and
small as it supports compression.
For many use cases, when you are writing to media, it makes more sense than
using an initramfs as it does not require RAM, and it is more suitable for
disk media than ISO.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
These drivers are for HPE SCSI cards and enabling them subsequently
enabled RAID_ATTRS and CHECK_SIGNATURE.
Only enabled for 4.9 and 4.12 kernels.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This enables per task (IO) accounting which is useful
for monitoring IO activity and the like.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
Note, on x86_64 for 4.12.9 a new kernel option,
HARDLOCKUP_CHECK_TIMESTAMP was added which defaults to enabled. It enables
a low pass filter to compensate for perf based hard lockup detection.
Added this option to the x86_64 4.12.x kernel confog file.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This is a recommended security measure to protect the low portion
of virtual memory. On x86_64 the recommended value is 65536 while
for arm it shouldn't be higher than 32768.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
The resulting kernel boots fine on qemu and on Cavium Thunder,
though the latter still has some issues.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
