ChangeLog/8.0

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.

Arm

• The following CPU architecture features are now emulated:
  • FEAT_EVT
  • AArch32 ARMv8-R support
• New emulated CPU types:
  • Cortex-A55 CPU
  • Cortex-R52 CPU

Machines

• The cubieboard machine is now able to boot directly from an SD card image.
• New machine types:
  • ``olimex-stm32-h405`` -- Olimex STM32 H405 board with STM32F405RGT6 microcontroller

HPPA

• Implemented fid instruction (Floating-Point Identify)
• Create illegal instruction when executing 64-bit load/save on 32-bit emulation

RISC-V

ISA and Extensions

• Add smstateen support
• Support native debug icount trigger
• Support cache-related PMU events in virtual mode
• Add Zawrs ISA extension support

Machines

• Bump the OpenTitan supported version
• Add some missing PolarFire SoC io regions
• riscv_htif: Support console output via proxy syscall

Fixes and Misc

• Fix PMP propagation for tlb
• Remove the redundant ipi-id property in the virt machine
• Fix mret exception cause when no pmp rule is configured
• Fix bug where disabling compressed instructions would crash QEMU
• Cleanup firmware and device tree loading
• Fix elen check when using vector extensions
• Ensure we always follow MISA parsing
• Fix up masking of vsip/vsie accesses
• Trap on writes to stimecmp from VS when hvictl.VTI=1

Device emulation and assignment

Semihosting

• semihosting now has some documentation in the manual
• semihosting only supports O_BINARY mode for file operations

TCG Plugins

• some deadlocks cases where fixed when using plugins

Known issues

• see Planning/8.0