Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 62 insertions, 0 deletions

diff --git a/docs/system/target-sparc.rst b/docs/system/target-sparc.rst
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+.. _Sparc32-System-emulator:
+
+Sparc32 System emulator
+-----------------------
+
+Use the executable ``qemu-system-sparc`` to simulate the following Sun4m
+architecture machines:
+
+-  SPARCstation 4
+
+-  SPARCstation 5
+
+-  SPARCstation 10
+
+-  SPARCstation 20
+
+-  SPARCserver 600MP
+
+-  SPARCstation LX
+
+-  SPARCstation Voyager
+
+-  SPARCclassic
+
+-  SPARCbook
+
+The emulation is somewhat complete. SMP up to 16 CPUs is supported, but
+Linux limits the number of usable CPUs to 4.
+
+QEMU emulates the following sun4m peripherals:
+
+-  IOMMU
+
+-  TCX or cgthree Frame buffer
+
+-  Lance (Am7990) Ethernet
+
+-  Non Volatile RAM M48T02/M48T08
+
+-  Slave I/O: timers, interrupt controllers, Zilog serial ports,
+   keyboard and power/reset logic
+
+-  ESP SCSI controller with hard disk and CD-ROM support
+
+-  Floppy drive (not on SS-600MP)
+
+-  CS4231 sound device (only on SS-5, not working yet)
+
+The number of peripherals is fixed in the architecture. Maximum memory
+size depends on the machine type, for SS-5 it is 256MB and for others
+2047MB.
+
+Since version 0.8.2, QEMU uses OpenBIOS https://www.openbios.org/.
+OpenBIOS is a free (GPL v2) portable firmware implementation. The goal
+is to implement a 100% IEEE 1275-1994 (referred to as Open Firmware)
+compliant firmware.
+
+A sample Linux 2.6 series kernel and ram disk image are available on the
+QEMU web site. There are still issues with NetBSD and OpenBSD, but most
+kernel versions work. Please note that currently older Solaris kernels
+don't work probably due to interface issues between OpenBIOS and
+Solaris.