Re: [PATCH v7 0/9] target/arm/kvm: enable SVE in guests

[Peter Maydell]

On Thu, 24 Oct 2019 at 14:42, Peter Maydell <address@hidden> wrote:
>
> On Thu, 24 Oct 2019 at 13:18, Andrew Jones <address@hidden> wrote:
> >
> > Since Linux kernel v5.2-rc1 KVM has support for enabling SVE in guests.
> > This series provides the QEMU bits for that enablement. First, we
> > select existing CPU properties representing features we want to
> > advertise in addition to the SVE vector lengths and prepare
> > them for a qmp query. Then we introduce the qmp query, applying
> > it immediately to those selected features. We also document ARM CPU
> > features at this time. We next add a qtest for the selected CPU
> > features that uses the qmp query for its tests - and we continue to
> > add tests as we add CPU features with the following patches. So then,
> > once we have the support we need for CPU feature querying and testing,
> > we add our first SVE CPU feature property, 'sve', which just allows
> > SVE to be completely enabled/disabled. Following that feature property,
> > we add all 16 vector length properties along with the input validation
> > they need and tests to prove the validation works. At this point the
> > SVE features are still only for TCG, so we provide some patches to
> > prepare for KVM and then a patch that allows the 'max' CPU type to
> > enable SVE with KVM, but at first without vector length properties.
> > After a bit more preparation we add the SVE vector length properties
> > to the KVM-enabled 'max' CPU type along with the additional input
> > validation and tests that that needs.  Finally we allow the 'host'
> > CPU type to also enjoy these properties by simply sharing them with it.
> >
>
>
>
> Applied to target-arm.next, thanks.

Fails 'make check' on my aarch32-compile-in-chroot-on-aarch64
machine:

(armhf)pmaydell@mustang-maydell:~/qemu/build/all-a32$
QTEST_QEMU_BINARY=arm-softmmu/qemu-system-arm tests/arm-cpu-features
/arm/arm/query-cpu-model-expansion: OK
/arm/arm/kvm/query-cpu-model-expansion: qemu-system-arm: Failed to
retrieve host CPU features
Broken pipe
/home/peter.maydell/qemu/tests/libqtest.c:140: kill_qemu() tried to
terminate QEMU process but encountered exit status 1 (expected 0)
Aborted

Dropping again :-(

thanks
-- PMM