On 2021-08-22 15:44, Marc Zyngier wrote:

With the availability of a fruity range of arm64 systems, it becomes
obvious that QEMU doesn't deal very well with limited IPA ranges when
used as a front-end for KVM.

This short series aims at making usable on such systems:
- the first patch makes the creation of a scratch VM IPA-limit aware
- the second one actually removes the highmem devices from the
computed IPA range when highmem=off
- the last one addresses an imprecision in the documentation for the
highmem option

This has been tested on an M1-based Mac-mini running Linux v5.14-rc6.

I realise I haven't been very clear in my description of the above.
With this series, using 'highmem=off' results in a usable VM, while
sticking to the default 'highmem=on' still generates an error.

         M.
-- 
Jazz is not dead. It just smells funny...