ChangeLog/4.1

System emulation

New deprecated options and features

Consult the "Deprecated Features" appendix for the full list of historically deprecated features/options.

Arm

• QEMU now supports emulating an FPU for Cortex-M CPUs, and the Cortex-M4 and Cortex-M33 now provide the FPU.

PowerPC

• NVIDIA V100 GPU/NVLink2 passthrough for spapr using VFIO PCI

s390

• The bios now supports IPL (boot) from ECKD DASD assigned to the guest via vfio-ccw.

Memory backends

• QEMU will automatically try to use the MAP_SYNC mmap flag for memory backends configured with pmem=on,share=on

Miscellaneous

• Unless QEMU is configured with --disable-blobs, make install will install UEFI platform firmware binaries, and matching variable store templates, at $prefix/share/qemu/edk2-*.fd.
  • These files are built from the edk2 project's ArmVirtPkg and OvmfPkg firmware platforms, and the edk2 project's OpenSSL submodule.
  • They are documented (and exposed to virt management applications) through JSON files in $prefix/share/qemu/firmware/.
  • The schema definition for the JSON descriptors is located at docs/interop/firmware.json in the QEMU source tree.

Known issues

• see Planning/4.1