public/nixpkgs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

linux: configure aarch64 contiguous memory allocator via kernel config

Browse Source 
As per the in-line comment, this is where distros should configure it.
Not via kernel command line parameters.

As found by looking at the implementation, while exploring the cause of
a bug on the Raspberry Pi 4, it was found that `cma=` on the command
line parameters will overwrite the values a device tree will have
configured for a given platform.

With this, the more recent 5.4 vendor kernel boots just fine on the
Raspberry Pi 4 using our common configuration.
This commit is contained in:
Samuel Dionne-Riel
2020-12-31 18:20:49 +01:00
committed by Milan
parent f9d5de05d2
commit 4e75a31e98
2 changed files with 7 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
nixos/modules/installer/cd-dvd/sd-image-aarch64.nix
+1 -2
View File
@@ -17,8 +17,7 @@
# The serial ports listed here are:
# - ttyS0: for Tegra (Jetson TX1)
# - ttyAMA0: for QEMU's -machine virt
# Also increase the amount of CMA to ensure the virtual console on the RPi3 works.
boot.kernelParams = ["cma=32M" "console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"];
boot.kernelParams = ["console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"];
boot.initrd.availableKernelModules = [
# Allows early (earlier) modesetting for the Raspberry Pi