ChangeLog/2.9: Difference between revisions
(→x86: SMI broadcast) |
(→fw_cfg: write support via DMA) |
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==== Xen ==== | ==== Xen ==== | ||
==== fw_cfg ==== | ==== fw_cfg ==== | ||
The DMA interface to fw_cfg now supports writeable blobs. | |||
The <tt>fw_cfg_io</tt> and <tt>fw_cfg_mem</tt> devices now have more slots for files; the <tt>FW_CFG_FILE_SLOTS</tt> constant has been replaced with the (internal only) <tt>x-file-slots</tt> property. The property can be further raised in future machine types if absolutely necessary. | The <tt>fw_cfg_io</tt> and <tt>fw_cfg_mem</tt> devices now have more slots for files; the <tt>FW_CFG_FILE_SLOTS</tt> constant has been replaced with the (internal only) <tt>x-file-slots</tt> property. The property can be further raised in future machine types if absolutely necessary. | ||
Revision as of 16:16, 20 February 2017
System emulation
Incompatible changes
Future incompatible changes
ARM
KVM
MIPS
PowerPC
pSeries
s390
SH
SPARC
TileGX
Tricore
x86
Xen
SMI broadcast
The pc-q35-2.9 machine type now offers SMI feature negotiation to interested guest firmware. The negotiation interface resembles virtio-1.0, with the etc/smi/supported-features, etc/smi/requested-features, and etc/smi/features-ok fw_cfg files. Currently one bit can be negotiated by guest firmware, ICH9_LPC_SMI_F_BROADCAST_BIT, which causes QEMU to inject a syncronous SMI (triggered through APM_CNT_IOPORT) on all VCPUs at once.
Device emulation and assignment
ACPI
Block devices
Network devices
SCSI
PCI/PCIe
USB
VFIO
virtio
Xen
fw_cfg
The DMA interface to fw_cfg now supports writeable blobs.
The fw_cfg_io and fw_cfg_mem devices now have more slots for files; the FW_CFG_FILE_SLOTS constant has been replaced with the (internal only) x-file-slots property. The property can be further raised in future machine types if absolutely necessary.