Re: dom0 PV looping on search_pre_exception_table()

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 11/12/2020 11:15, Manuel Bouyer wrote:
> On Fri, Dec 11, 2020 at 09:58:54AM +0100, Jan Beulich wrote:
>> Could you please revert 9ff970564764 ("x86/mm: drop guest_get_eff_l1e()")?
>> I think there was a thinko there in that the change can't be split from
>> the bigger one which was part of the originally planned set for XSA-286.
>> We mustn't avoid the switching of page tables as long as
>> guest_get_eff{,_kern}_l1e() makes use of the linear page tables.
> Yes, reverting this commit also makes the dom0 boot.
>

This was going to be my next area of investigation.  Thanks for confirming.

In hindsight, the bug is very obvious...

~Andrew