ChangeLog/7.2

System emulation

Incompatible changes

Consult the 'Removed features' page for details of suggested replacement functionality.

New deprecated options and features

Consult the "Deprecated Features" chapter of the QEMU System Emulation User's Guide for further details of the deprecations and their suggested replacements.

OpenRISC

• Stability improvements
• Performance improvements by supporting MTTCG
• New virt platform is added to assist with CI and device testing

RISC-V

ISA and Extensions

• Update [m|h]tinst CSR in interrupt handling
• Force disable extensions if priv spec version does not match
• fix shifts shamt value for rv128c
• move zmmul out of the experimental
• Add checks for supported extension combinations
• Fix typo and restore Pointer Masking functionality for RISC-V
• Add mask agnostic behaviour (rvv_ma_all_1s) for vector extension
• Add Zihintpause support
• Add xicondops in ISA entry
• Use official extension names for AIA CSRs

Machines

• virt: pass random seed to fdt
• opentitan: bump opentitan version
• virt machine device tree improvements

Fixes and Misc

• Upgrade OpenSBI to v1.1
• microchip_pfsoc: fix kernel panics due to missing peripherals
• Remove additional priv version check for mcountinhibit

Character devices

• UNIX socket support on Windows has been added

Network

• Fixed bug that could cause a stack or heap overflow with the emulated "tulip" NIC (CVE-2022-2962)

Build Information

Build Dependencies

• Python 3.7 or newer is now required.

Known issues

• see Planning/7.2