Re: [PATCH v5 0/6] target/arm: Reduced-IPA space and highmem fixes

[Peter Maydell]

On Fri, 14 Jan 2022 at 14:08, Marc Zyngier <maz@kernel.org> wrote:
>
> Here's yet another stab at enabling QEMU on systems with
> pathologically reduced IPA ranges such as the Apple M1 (previous
> version at [1]). Eventually, we're able to run a KVM guest with more
> than just 3GB of RAM on a system with a 36bit IPA space, and at most
> 123 vCPUs.
>
> This also addresses some pathological QEMU behaviours, where the
> highmem property is used as a flag allowing exposure of devices that
> can't possibly fit in the PA space of the VM, resulting in a guest
> failure.
>
> In the end, we generalise the notion of PA space when exposing
> individual devices in the expanded memory map, and treat highmem as
> another flavour of PA space restriction.



Applied to target-arm.next, thanks.

-- PMM