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2012-04-15acpi_piix4: Re-define PCI hotplug eject register readAlex Williamson1-2/+10
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 becomes the base implementation. As we make use of new interfaces we'll set bits here to allow the BIOS and AML implementation to optimize for the platform implementation. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-04-15acpi_piix4: Remove PCI_RMV_BASE write codeAlex Williamson1-1/+1
Clarify this register as read-only and remove write code. No change in existing behavior. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-04-15acpi_piix4: Disallow write to up/down PCI hotplug registersAlex Williamson1-2/+2
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 as read-only registers. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-04-07Replace Qemu by QEMU in internal documentationStefan Weil1-1/+1
The official spelling is QEMU. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-12-15qcow2: Allow >4 GB VM stateKevin Wolf1-1/+7
This is a compatible extension to the snapshot header format that allows saving a 64 bit VM state size. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-28qcow2: fix some errors and typo in qcow2.txtZhi Yong Wu1-3/+3
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-13docs: Describe zero data clusters in QED specificationStefan Hajnoczi1-0/+8
Zero data clusters are a space-efficient way of storing zeroed regions of the image. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-03-16Add qcow2 documentationKevin Wolf1-0/+260
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) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-01-17document QEMU<->ACPIBIOS PCI hotplug interfaceMarcelo Tosatti1-0/+37
Document how QEMU communicates with ACPI BIOS for PCI hotplug. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-12-17docs: Fix missing carets in QED specificationStefan Hajnoczi1-2/+2
For some reason the carets ('^') in the QED specification disappeared. This patch puts them back. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17docs: Add QED image format specificationStefan Hajnoczi1-0/+130
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-10Device specification for shared memory PCI deviceCam Macdonell1-0/+96
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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