** Also affects: linux-raspi2 (Ubuntu Focal)
Importance: Critical
Assignee: Hui Wang (hui.wang)
Status: New
** Also affects: linux-raspi2 (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: linux-raspi2 (Ubuntu Eoan)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1853446
Title:
linux-raspi2: set two flavours to armhf kernel and change the flavour
name to raspi4 for arm64 kernel
Status in linux-raspi2 package in Ubuntu:
New
Status in linux-raspi2 source package in Eoan:
New
Status in linux-raspi2 source package in Focal:
New
Bug description:
[Impact]
It is risky to use single armhf kernel to support rpi2/3/4, since
upstream has a specific config for rpi2/3 and another config for rpi4,
the major difference are LPAE, HIGHMEM and VMSPLIT_3G, we already
met a bug that is intrduced by HIGHMEM and VMSPLIT_3G on rpi2/3,
so add two falvours for rpi2/3 and rpi4.
flavour 1: raspi2 (for rpi2/3, disable LPAE, HIGHMEM and VMSPLIT_3G)
flavour 2: raspi4 (for rpi4, enable LPAE, HIGHMEM and VMSPLIT_3G)
For arm64 kernel, we change the flavour name to raspi4, it supports
rpi2/3/4.
[Fix]
Change the related configuration files in the debian.raspi2.
[Test Case]
After apply the patches, and I built two flavours of armhf and
arm64 kernels, Then check the .config, they all meet the expectation.
And boot those kernels on the rpi2/3/4 boards. worked well.
[Regression Risk]
Low, just change the flavour name for arm64, and for armhf, the
flavour raspi4 is basically same as bofre (raspi2), the new flavour
raspi2 just disable LPAE/HIGHMEM/VMSPLIT_3G, it is same as the config
for rpi2/3 in the upstream.
For armhf kernel:
flavour 1: raspi2 # support rpi2/3 boards
flavour 2: raspi4 # support rpi4 boards (in theory support all rpi2/3/4
boards)
Form arm64 kernel:
flavour 1: raspi4 # support rpi2/3/4 boards
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