ChangeLog/9.0: Difference between revisions
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=== Testing and CI === | === Testing and CI === | ||
* The timeout for TCG tests was raised to 120s (for the benefit of TCI) | |||
== Known issues == | == Known issues == | ||
* See https://gitlab.com/qemu-project/qemu/-/milestones/11 | * See https://gitlab.com/qemu-project/qemu/-/milestones/11 |
Revision as of 19:01, 28 February 2024
System emulation
Removed features and incompatible changes
Consult the 'Removed features' page for details of suggested replacement functionality.
- Running QEMU with KVM requires Linux 4.4 or newer. A future version of QEMU will increase the minimum requirement for Arm hosts to Linux 4.19 (also when running KVM); if this is too restrictive for your use case, please contact us at qemu-devel@nongnu.org.
- The behaviour of the '-serial none' option when used together with other '-serial' options has been corrected. Previously when '-serial none' was followed by '-serial something' the '-serial none' was effectively ignored. Now it controls the existence of the first serial port, and the following '-serial' option controls the behaviour of the second serial port; this brings it in to line with how all other cases of multiple '-serial' options work. If you have a command line that was accidentally relying on the old behaviour, you can simply delete the unnecessary '-serial none'.
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.
- The CRIS architecture has been marked deprecated
68k
- Fixed exception frame format for 68010
Alpha
Arm
- New architectural features now emulated:
- FEAT_NV
- FEAT_NV2
- New board types:
- b-l475e-iot01a : the B-L475E-IOT01A board (currently minimal support only)
- mps3-an536 : a Cortex-R52 board modelling the AN536 firmware image for the MPS3 development board
- raspi4b : the Raspberry Pi 4 Model B. Note that QEMU does not yet model PCI or ethernet; we hope to implement those devices for the next QEMU release.
- Changes to existing board types:
- The Freescale i.MX6 now models the cache controller and the PCIe controller
- The Allwinner R40 and Bananapi boards now model the USB controllers, the AHCI/SATA controller and the watchdog timer
- Raspberry Pi boards now support the SPI controller
- The npcm7xx based boards now support the ethernet controllers
- The virt board now wires up non-secure EL2 virtual timer IRQ when EL2 emulation is enabled with 'virtualization=on'.
Note that when the virt board uses the non-secure EL2 virtual timer IRQ, this will trip a bug in older versions of the EDK2 guest firmware, which causes EDK2 to assert on bootup with "ASSERT [ArmTimerDxe] /home/kraxel/projects/qemu/roms/edk2/ArmVirtPkg/Library/ArmVirtTimerFdtClientLib/ArmVirtTimerFdtClientLib.c(72): PropSize == 36 || PropSize == 48". If you see that assertion you should do one of:
- update your EDK2 binaries to edk2-stable202311 or newer
- use the 'virt-8.2' versioned machine type
- not use 'virtualization=on'
AVR
Hexagon
HPPA
- SeaBIOS-hppa version 16
- 64-bit and 32-bit SeaBIOS firmware binary
- Fixed 32-bit HP-UX crashes on B160L (32-bit) machine
- Fixed NetBSD boot failure due to power button in page zero
- Fixed NetBSD FPU detection failure
- Fixed OpenBSD 7.4 boot failure
- Allows usage of up to 3840 MB of memory (instead of 3 GB)
- Supports the qemu --nodefaults option
- Added qemu-specific opcodes for "HALT QEMU", "RESET QEMU" and "RESTORE SHR" (restore shadow registers).
- No abort on access failure in Astro/Elroy registers
- Fixed tulip driver in NetBSD
LoongArch
ISA and Extensions
Machines
Microblaze
MIPS
Nios2
- A bug was fixed in nios2-linux-user that meant async work was being skipped
OpenRISC
PowerPC
Renesas RX
Renesas SH
RISC-V
ISA and Extensions
- Add support for Zacas extension
- Add amocas.[w,d,q] instructions
- RVA22 profiles support
- Add RVV CSRs to KVM
- Add support for 'B' extension
- Implement optional CSR mcontext of debug Sdtrig extension
- Add support for Zaamo and Zalrsc
- Enable xtheadsync under user mode
Machines
- ACPI: Enable AIA, PLIC and update RHCT
- Fix the interrupts-extended property format of PLIC
- Document acpi parameter of virt machine
- Remove group setting of KVM AIA if the machine only has 1 socket
- sifive_u: Update S-mode U-Boot image build instructions
- Support vlenb and vregs[] in KVM
- Support new isa extension detection devicetree properties
- SMBIOS support for RISC-V virt machine
- Add rv32i,rv32e and rv64e CPUs
Fixes and Misc
- Fix th.dcache.cval1 priviledge check
- Don't allow write mstatus_vs without RVV
- Fix machine IDs QOM getters
- Fix KVM reg id sizes
- Upgrade OpenSBI from v1.3.1 to v1.4
- pmp: Ignore writes when RW=01 and MML=0
- Don't adjust vscause for exceptions
- Ensure mideleg is set correctly on reset
- Check for 'A' extension on all atomic instructions
s390x
- Fix access register handling in the emulation of the LOAD ADDRESS EXTENDED (LAE) instruction
- Add emulation of CVDG, CVB, CVBY and CVBG instructions
SPARC
Tricore
x86
Xen emulation under KVM
TCG
Known issues
Xtensa
Device emulation and assignment
ACPI / SMBIOS
Audio
Block devices
- The 'luks' block device driver now supports creation and usage of detached LUKS header files
Graphics
Hyper-V
I2C
Input devices
IPMI
Multi-process QEMU
Network devices
NVDIMM
NVMe
PCI/PCIe
SCSI
- The ESP SCSI (am53c974/dc390) device has been substantially rewritten, fixing several long-standing bugs and making it easier to maintain in future.
SD card
SMBIOS
TPM
UFS
USB
VFIO
virtio
vDPA
Xen
fw_cfg
9pfs
virtiofs
Semihosting
Audio
Character devices
- Fix potential crash if connection is dropped while the TLS handshake is still in progress
Crypto subsystem
- The 'sm4' cipher algorithm is now supported and can be used with the 'luks' block driver
Authorization subsystem
GUI
GDBStub
- the gdbstub now supports catching syscalls in user-mode
TCG Plugins
- A new API for accessing register values is now available (and used by execlog)
Host support
Memory backends
- Memory backends specified on the QEMU commandline can now be preallocated concurrently/asynchronously in some configurations, to speedup QEMU startup with preallocation on multiple memory backends: one requirement is that memory backends that are getting preallocated have a "thread-context" set.
- QEMU 8.2 accidentally allowed for creation of memory backends with sizes that are not aligned to the (huge) page size. This has been fixed.
Migration
- Fixed migration for SUSPENDED VM, where we used to ignore the SUSPENDED state and kick off the VM even if it was suspended before the migration.
Monitor
QMP
HMP
Network
Block device backends and tools
Tracing
Semihosting
Miscellaneous
- During startup QEMU system emulators will raise the max file descriptors soft limit to match the hard limit
User-mode emulation
runtime
binfmt_misc
alpha
arm/arm64/aarch64
LoongArch
HPPA
s390
x86
TCG
Record/Replay
- fixed record/replay to avoid problems with partial chardev drains
- updated replay-dump.py for current ABI
RISC-V
Guest agent
Build Information
Build Dependencies
- The OpenBSD VM was updated to 7.4
Docker Tweaks
Windows
Testing and CI
- The timeout for TCG tests was raised to 120s (for the benefit of TCI)