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Name Size
acpi_pci_hotplug.txt 1.7 kB
ivshmem_device_spec.txt 4.3 kB
ppc-spapr-hcalls.txt 2.6 kB
qcow2.txt 13.6 kB
qed_spec.txt 8.1 kB

Latest revisions

# Date Author Comment
c73e3771 06/24/2012 02:04 am Benjamin Herrenschmidt

spapr: Add "memop" hypercall

This adds a qemu-specific hypervisor call to the pseries machine
which allows to do what amounts to memmove, memcpy and xor over
regions of physical memory such as the framebuffer.

This is the simplest way to get usable framebuffer speed from...
bf3f363a 05/02/2012 07:39 pm Zhi Yong Wu

docs: fix one issue in qcow2 specs

Signed-off-by: Zhi Yong Wu <>
Signed-off-by: Kevin Wolf <>
4fabffc1 04/20/2012 04:57 pm Kevin Wolf

Specification for qcow2 version 3

This updates the qcow2 specification to cover version 3. It contains the
following changes:

- Added compatible/incompatible/auto-clear feature bits plus an optional
feature name table to allow useful error messages even if an older...
31745aab 04/15/2012 12:17 pm Alex Williamson

acpi_piix4: Remove PCI_RMV_BASE write code

Clarify this register as read-only and remove write code. No
change in existing behavior.

Signed-off-by: Alex Williamson <>
Signed-off-by: Michael S. Tsirkin <>
9290f364 04/15/2012 12:17 pm Alex Williamson

acpi_piix4: Re-define PCI hotplug eject register read

The PCI hotplug eject register has always returned 0, so let's redefine
it as a hotplug feature register. The existing model of using separate
up & down read-only registers and an eject via write to this register...
ba737541 04/15/2012 12:17 pm Alex Williamson

acpi_piix4: Disallow write to up/down PCI hotplug registers

The write side of these registers is never used and actually can't be
used as defined because any read/modify/write sequence from the guest
potentially races with qemu. Drop the write support and define these...
6576b74b 04/07/2012 04:58 pm Stefan Weil

Replace Qemu by QEMU in internal documentation

The official spelling is QEMU.

Signed-off-by: Stefan Weil <>
Reviewed-by: Andreas Färber <>
Signed-off-by: Blue Swirl <>
c2c9a466 12/15/2011 01:40 pm Kevin Wolf

qcow2: Allow >4 GB VM state

This is a compatible extension to the snapshot header format that allows
saving a 64 bit VM state size.

Signed-off-by: Kevin Wolf <>
3789985f 10/28/2011 08:25 pm Zhi Yong Wu

qcow2: fix some errors and typo in qcow2.txt

Signed-off-by: Zhi Yong Wu <>
Signed-off-by: Kevin Wolf <>
d54f10bb 04/13/2011 01:06 pm Stefan Hajnoczi

docs: Describe zero data clusters in QED specification

Zero data clusters are a space-efficient way of storing zeroed regions
of the image.

Signed-off-by: Stefan Hajnoczi <>
Signed-off-by: Kevin Wolf <>

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