[Libre-soc-dev] [OpenPOWER-HDL-Cores] https://bugzilla.kernel.org/show_bug.cgi?id=213257

[Lauri Kasanen]

On Sun, 30 May 2021 05:12:52 +0100
Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:

> unless KVM's usage API requires the *caller* (host) to
> preserve FP (and VSX) regs and FPSCR?

This is not even possible. The kernel is responsible for switching regs
on app context switch. Returning to the kvm app, that app has no access
to anything but its own regs.

- Lauri