KVM In Linux 4.2 Adds Support For x86 Write Combining, SMM

Written by Michael Larabel in Virtualization on 24 June 2015 at 05:57 AM EDT. Add A Comment
The KVM (Kernel-based Virtual Machine) updates for Linux 4.2 are exciting for x86 Linux users.

The KVM x86 code in Linux 4.2 adds support for the System Management Mode, which is needed for supporting UEFI Secure Boot in guest VMs. As part of this comes KVM support for handling multiple address spaces.

The KVM x86 code for Linux 4.2 also adds support for write combining, support for virtualized performance counters on AMD, and various other changes. In the non-x86 world is VFIO integration for KVM on ARM, clean-ups and optimizations on IBM s390, and various other fixes and improvements.

More details on these Linux 4.2 KVM changes via the pull request.
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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 20,000 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, LinkedIn, or contacted via MichaelLarabel.com.

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