Konstantin Belousov wrote:
On Wed, Aug 29, 2018 at 09:12:37AM -0500, Kyle Evans wrote:
I guess this patch might do it:
https://people.freebsd.org/~kevans/efi-bootmap.diff
Linux commit messages depict a tale in which they used to also only
map RUNTIME entries, but they were effectively forced to back down on
that because of buggy firmware that does exactly what you've described
and they later reintroduced the restrictive mapping for i386-only
where they'd not found such bugs.
Orthogonal to the loader patch, please try the following. Even better,
try this with the stock loader.
You need to remove efirt from the kernel config for now, instead load
efirt.ko, perhaps after the system booted into single user. I am interested
if the panic goes away. You should see some interesting message from
kernel about EFI realtime clock.
If you have any binary modules like nvidia or vbox, do not load them
with the patched kernel.
Done, getting exactly the same fault without any new messages printed
(made sure I'm using the updated efirt using `nm | grep efirt_fault`).
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