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authorCornelia Huck2020-03-18 11:39:40 +0100
committerCornelia Huck2020-03-23 12:36:27 +0100
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Documentation: create/move s390x documentation
Create a subdirectory for s390x under docs/system/ and move the existing vfio-ap documentation there. Create an initial document describing s390x system emulation. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20200318103940.1169-1-cohuck@redhat.com>
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+.. _s390x-System-emulator:
+
+s390x System emulator
+---------------------
+
+QEMU can emulate z/Architecture (in particular, 64 bit) s390x systems
+via the ``qemu-system-s390x`` binary. Only one machine type,
+``s390-ccw-virtio``, is supported (with versioning for compatibility
+handling).
+
+When using KVM as accelerator, QEMU can emulate CPUs up to the generation
+of the host. When using the default cpu model with TCG as accelerator,
+QEMU will emulate a subset of z13 cpu features that should be enough to run
+distributions built for the z13.
+
+Device support
+==============
+
+QEMU will not emulate most of the traditional devices found under LPAR or
+z/VM; virtio devices (especially using virtio-ccw) make up the bulk of
+the available devices. Passthrough of host devices via vfio-pci, vfio-ccw,
+or vfio-ap is also available.
+
+.. toctree::
+ s390x/vfio-ap
+