Merge tag 'pull-or1k-20220904' of https://github.com/stffrdhrn/qemu into staging

OpenRISC updates for 7.2.0

Updates to add the OpenRISC virt plaform to QEMU. Highlights
include:

- New virt plaform with, virtio and pci bus support
- OpenRISC support for MTTCG
- Goldfish RTC device endianness is configurable now

# -----BEGIN PGP SIGNATURE-----
#
# iQIzBAABCAAdFiEE2cRzVK74bBA6Je/xw7McLV5mJ+QFAmMURl4ACgkQw7McLV5m
# J+TAVg/6A1HFazEBDzyVvg5BWfusvPMv1gWyAXQVbZDdoEVP5ilJq3Xz2vlOWu+Q
# 46WHAncQH8KGWlS7x4Qk9X1tOU+9LCTa0aBqa1ARAle/wGKJeQ2QkmQM7lnAAtFt
# ON9pDOrj85cNVp7ly/rZqmOkYorUtSblKllOigPaxZozfSA2FuoYwc7vLxy/ICk0
# 6RbRUKiIvqvNxhT0q13buIiqhtQAOLC2/Rrlp/CqUm+nrNlSVQIMC57ddNoopUFN
# I6jb5UxyHtQSlWX6zsLjvho9hlZCuA9IIG7B4qS4/kyC7XJGmOICb3A7QSmfaUxy
# HtEsaImjjhCUnJs8fhDHqyYnUu6JcXMRv61hIr7GNK/g3enpBzG1Otu5jsyHgzEX
# SaachdFUibLJSj/+K4YOaT9luAc0Yvx9vArnXD+2wGg3kHTSDUNv2nFdyLyn5PNM
# sZ9gx6gTEFI7iaeHEZM/doKdlHubddA/GH4DLy2fwZN7EyIsbll9TDJ8icqu1UBT
# KpQdN55VeVqdOEvKUSXxsAK8aRtTjlEErKinufz1yyrg5Lw9XgH1xtTft+rJyXPu
# Lw0hMHYqeaWhNUgnli/ByTY7yd+wC/ukNFQLUlMiDte337Lx9H//MOVvyl6Y5ARE
# jIWt1JlTyuhj+txJrGZMvBrc2ZQ6fF/4HXc/xyGK7eJnEWZIzkY=
# =BzgX
# -----END PGP SIGNATURE-----
# gpg: Signature made Sun 04 Sep 2022 02:31:58 EDT
# gpg:                using RSA key D9C47354AEF86C103A25EFF1C3B31C2D5E6627E4
# gpg: Good signature from "Stafford Horne <shorne@gmail.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D9C4 7354 AEF8 6C10 3A25  EFF1 C3B3 1C2D 5E66 27E4

* tag 'pull-or1k-20220904' of https://github.com/stffrdhrn/qemu:
  docs/system: openrisc: Add OpenRISC documentation
  hw/openrisc: virt: pass random seed to fdt
  target/openrisc: Interrupt handling fixes
  target/openrisc: Enable MTTCG
  target/openrisc: Add interrupted CPU to log
  hw/openrisc: Initialize timer time at startup
  hw/openrisc: Add PCI bus support to virt
  hw/openrisc: Add the OpenRISC virtual machine
  goldfish_rtc: Add big-endian property
  target/openrisc: Fix memory reading in debugger
  hw/openrisc: Split re-usable boot time apis out to boot.c

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/docs/system/openrisc/or1k-sim.rst b/docs/system/openrisc/or1k-sim.rst
new file mode 100644
index 0000000000..ef10439737
--- /dev/null
+++ b/docs/system/openrisc/or1k-sim.rst
@@ -0,0 +1,43 @@
+Or1ksim board
+=============
+
+The QEMU Or1ksim machine emulates the standard OpenRISC board simulator which is
+also the standard SoC configuration.
+
+Supported devices
+-----------------
+
+ * 16550A UART
+ * ETHOC Ethernet controller
+ * SMP (OpenRISC multicore using ompic)
+
+Boot options
+------------
+
+The Or1ksim machine can be started using the ``-kernel`` and ``-initrd`` options
+to load a Linux kernel and optional disk image.
+
+.. code-block:: bash
+
+  $ qemu-system-or1k -cpu or1220 -M or1k-sim -nographic \
+        -kernel vmlinux \
+        -initrd initramfs.cpio.gz \
+        -m 128
+
+Linux guest kernel configuration
+""""""""""""""""""""""""""""""""
+
+The 'or1ksim_defconfig' for Linux openrisc kernels includes the right
+drivers for the or1ksim machine.  If you would like to run an SMP system
+choose the 'simple_smp_defconfig' config.
+
+Hardware configuration information
+""""""""""""""""""""""""""""""""""
+
+The ``or1k-sim`` board automatically generates a device tree blob ("dtb")
+which it passes to the guest. This provides information about the
+addresses, interrupt lines and other configuration of the various devices
+in the system.
+
+The location of the DTB will be passed in register ``r3`` to the guest operating
+system.