Hi,
On 19-02-15 10:22, Ian Campbell wrote:
On Thu, 2015-02-19 at 09:11 +0100, Hans de Goede wrote:
Note assuming you're using linux-sunxi kernels and not upstream kernels you also
need "Enable workarounds for booting old kernels" for things to boot at all
on A20 based devices,
IIRC there is also an env var which can be set to force booting in
secure mode?
Correct, doing:
setenv bootm_boot_mode sec
Before calling "bootm" also is a way to boot old kernels on A20 devices.
because the new u-boot by default boots the kernel in
non secure mode (so that it can be a hypervisor and hw accelerated qemu-kvm
works
on the A20), but the old kernels do not work when booted in non secure mode
(another bug in the old kernels, for which no fix is available).
(probably some mainline commits to head.S to handle boot in hyp mode
could be backported, ignoring the actual KVM stuff)
IIRC someone took a quick look and this was non trivial, but yeah this would
really be the best thing to do, so that we can drop the old kernel compat
u-boot config at one point.
Regards,
Hans
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