arm/arm64: code derived from Linux must be GPL not LGPL

Also update copyrights.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
[Amend two other "Adapat

arm/arm64: code derived from Linux must be GPL not LGPL

Also update copyrights.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
[Amend two other "Adapated" typos as well.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Merge tag 'for-master' of https://github.com/rhdrjones/kvm-unit-tests into HEAD

arm/arm64 patches ready for master

arm/arm64: yield on cpu_relax

In many tests one or more cpus wait for events from other cpus. However,
with TCG, if the event triggering cpus then continue without first
informing TCG it should sche

arm/arm64: yield on cpu_relax

In many tests one or more cpus wait for events from other cpus. However,
with TCG, if the event triggering cpus then continue without first
informing TCG it should schedule other cpus, then those other cpus may
never get scheduled, and never see their events. This is because the
TCG scheduler relies on either the currently running cpu to invoke an
instruction that results in scheduling or for some I/O event to occur,
and then to do scheduling while handling the I/O. kvm-unit-tests do not
have external I/O events, so we must invoke a yielding instruction
wherever needed. cpu_relax() is almost always a place it's needed.

While this change is mostly for TCG, it's fine to do for KVM as well.
The Linux kernel made the same change with 1baa82f4803 for armv8. As
the yield instruction is also available on armv7, we make the change
for both.

Signed-off-by: Andrew Jones <drjones@redhat.com>

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arm/arm64: add cpu_relax() and friends

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

arm64: initial drop

This is the initial drop of the arm64 test framework and a first test
that just checks that setup completed (a selftest). kvm isn't needed
to run this test unless testing with sm

arm64: initial drop

This is the initial drop of the arm64 test framework and a first test
that just checks that setup completed (a selftest). kvm isn't needed
to run this test unless testing with smp > 1.

Try it out with
yum install gcc-aarch64-linux-gnu
./configure --cross-prefix=aarch64-linux-gnu- --arch=arm64
make
QEMU=[qemu with aarch64, mach-virt, and chr-testdev] ./run_tests.sh

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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