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acpi_pci_hotplug.txt 1.7 kB
ivshmem_device_spec.txt 4.3 kB
qcow2.txt 13.6 kB
qed_spec.txt 8.1 kB

Latest revisions

# Date Author Comment
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 <>
03feae73 03/16/2011 10:56 am Kevin Wolf

Add qcow2 documentation

This adds a description of the qcow2 file format to the docs/ directory.
Besides documenting what's there, which is never wrong, the document should
provide a good basis for the discussion of format extensions (called "qcow3"
in previous discussions)...

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