QEMU 1.7 Is Bringing New Features For Linux Emulation
Written by Michael Larabel in Virtualization on 26 November 2013 at 11:43 AM EST. 4 Comments
QEMU 1.7.0-rc2 was released yesterday and if all goes according to plan the official QEMU 1.7 release will happen on Wednesday. This next QEMU emulator update that's also relied upon by Linux KVM will bring some exciting improvements.

QEMU updates have been exciting in recent releases and the 1.7 update will be no different. Among the new features you can find in QEMU 1.7.0 when it ships this week include:

- Audio improvements with HDA device emulation now including a mixer by default. QEMU audio also now works on systems without Open Sound System support via /dev/dsp and honors the QEMU_AUDIO_TIMER_PERIOD environment variable to have less CPU utilization than earlier versions of QEMU.

- VFIO improvements.

- Performance and functionality improvements in QEMU's USB 3.0 support.

- PowerPC now supports dumping guest memory via the dump-guest-memory command.

- The x86 support in QEMU now supports generating ACPI tables that can be used by the firmware directly. In post-1.7 QEMU releases that can be used for enabling new features without modifying all of the firmware components like SeaBIOS and CoreBoot.

- Initial support for more than one Terabyte of RAM, but firmware support needs to be updated.

- Xen x86 HVM domains can now resume from suspend-to-RAM/S3.

- New block device commands for the QEMU monitor.

- The block device throttling algorithm has been rewritten. This new throttling code should be more robust and greater configuration support.

- User-mode emulation support for AArch64 (ARM 64-bit) binaries.

- The VHDX driver now supports creating and writing .vhdx images.

- The TCG (Tiny Code Generator) compiler now supports x32 hosts.

More details on QEMU 1.7 changes can be found via the Wiki-based change-log.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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