ChangeLog

kvm-53 [20 nov 2007]

• testsuite: exit on end of test
• batch mode for kvm_stat script
• compile fixes (Carlo Marcelo Arenas Belon, Joe Perches)
• portability (Jerone Young, Zhang Xiantao)
• disable lazy fpu on AMD (Amit Shah)
  • should fix instability on AMD
  • will cause performance regression, fix in progress
• x86 emulator: fix 'push r/m' emulation (Amit Shah)
• register use reduction in vmx guest entry
• infrastructure for per-vm stats
  • extends existing per-vcpu stats
• add mmu, state switch, emulation statistics
• use copy_{to,from}_user to access guest memory (Izik Eidus)
• simplify access to guest page tables (Izik Eidus)
• fix entry to real mode with segment bases beyond 1MB (Jan Kiszka)
• finally kill last use of cr2 in emulator (Sheng Yang)

kvm-52 [12 nov 2007]

• fix efer reload host crash on T2600 and similar processors
• revert sleepy interrupt injection
  • fixes "Fault when IDT_Vectoring"
• atomically inject real-mode interrupts
• wbinvd exiting on newer Intel processors (Eddie Dong)
  • fixes real-time issues
• fix call/jmp instruction emulation (Izik Eidus)
  • fixes Vista x64 installation
• fix save/restore/migrate with multiple nics
• fix build on i386 uniprocessor w/ no ioapic hosts
• fix smp_call_function_single() emulation on older hosts
  • fixes smp guests not booting on RHEL 5 hosts
• make qemu/kvm memory allocation match plain qemu more closely (Izik Eidus)
  • fixes issues with large memory guests
• libkvm compile fixes (Carlo Marcelo Arenas Belon, Jerone Young)

kvm-51 [7 nov 2007]

• fix some x86 emulator one-byte insns (fixes W2K3 installer again)
• fix host hangs with NMI watchdog on AMD
• fix guest SMP on AMD
• fix dirty page tracking when clearing a guest page (Dor Laor)
• more portability work (Hollis Blanchard, Jerone Young)
• fix FlexPriority with guest smp (Sheng Yang)
• improve rpm specfile (Akio Takebe, Avi Kivity)
• fix external module vs portability work (Andrea Arcangeli)
• remove elpin bios due to license violation
• testsuite shutdown pio port
• don't advertise svm on the guest
• fix reset with kernel apic (Markus Rechberger)

kvm-50 [2 nov 2007]

• fix smp_call_function_mask() emulation on preemptible kernels
• move libkvm into own directory (Hollis Blanchard)
• fix save/restore/migrate for new memory slot management (Uri Lublin)
• compile fixes (Uri Lublin, Avi Kivity)
• fix recursive locking on mmap() (Anthony Liguori)
• remove some cr2 dependencies from x86 emulator
• further simplify x86 emulator
• more portability work (Carsten Otte, Hollis Blanchard)
• Intel FlexPriority support (Sheng Yang)
• fix dirty page tracking on aliased pages (Uri Lublin)

kvm-49 [29 oct 2007]

• Fix PIT time-drift-fix (only with -no-kvm-irqchip) (Dan Kenigsberg)
• Fix vnc auth error with clients <= 3.7 protocol (Dan Kenigsberg)
• Don't spin on hlt with interrupts disabled (Dor Laor)
• Fix pxe boot (Izik Eidus)
• Hide the Intel real-mode tss from userspace (Izik Eidus)
• Automatic memory slot management for libkvm (Izik Eidus)
• Fix problem with std-vga and 4GB guests (Izik Eidus)
• External module compat for smp_call_function_mask() (Laurent Vivier)
• More portability work (Jerone Young, Christian Borntraeger, Zhang Xiantao)
• Fix sleep-in-atomic-context during vcpu init
• Fix 'push imm8' emulation (fixes W2K3 installer)
• Intercept invd and wbinvd on AMD
• Reduce emulator dependency on cr2 (mov abs insns)
• Move page fault processing to common code
• Fix rmap memory consumption oops due to increased rmap usage with swap
• Fix potential memory leak with kernel-allocated memslots (Izik Eidus)
• Export memory slot allocation mechanism (Izik Eidus)
• Add kernel-private memslots (Izik Eidus)
• Fix local apic divide-by-zero (Kevin Pedretti)
• Improve local apic timer wraparound handling (Kevin Pedretti)
• Use newly available smp_call_function_mask() (Laurent Vivier)
• Micro-optimize register usage on vmentry/vmexit (Laurent Vivier)
• Cleanups, compilation fixes (Akio Takebe, Anthony Liguori, Avi Kivity)

kvm-48 [18 oct 2007]

• use precise cpu accounting on ppc and s390 (Christian Borntraeger)
• make guest time accounting actually work (Laurent Vivier)
• fix host memory corruption when setting the guest dirty bit
• allow swapping with older userspace (Anthony Liguori)
• allow custom memory setup using libkvm (Gerd Hoffmann)

kvm-47 [18 oct 2007]

• Reset fixes (Eddie Dong, Avi Kivity)
• Portability work (Carsten Otte)
• Cleanups (Anthony Liguori, Laurent Vivier)
• Simplify guest pagetable dirty bit management
• Fix nx bit for huge pages
• Fix write access to clean large pages (fixes rmap leak)
• Support for Linux 2.6.16 guests (movnti instruction) (Sheng Yang)
• Simplify apic timer backlog processing
• Move interrupt injection out of critical section
• x86 emulator work (Nitin A Kamble)
• restore freebsd support on AMD (fix smsw and lmsw) (Aurelien Jarno)
• Simplify guest page table walker
• Partial guest swapping (Izik Eidus)
• kvmctl improvements (Anthony Liguori)
• libkvm, qemu compilation against older kernels
• guest time accounting (Laurent Vivier)
• configure improvements (Carlo Marcelo Arenas Belon)
• fix 4GB+ configurations (Izik Eidus)
• cross compilation support (Jerone Young)

kvm-46 [10 oct 2007]

• fix host oops on bad guest ioapic accesses
• handle NMIs before enabling host interrupts
• add general guest memory accessors (Izik Eidus)
• allow user control over shadow cache size (Izik Eidus)
• auto tune shadow cache size with guest memory (Izik Eidus)
• allocate guest memory in userspace instead of in kernel (Izik Eidus)
• code style fixes (Mike Day, Anthony Liguori)
• lapic cleanups (Rusty Russell)
• fix acpi interrupt reporting for FreeBSD
• fix color problems on certain displays
• Red Hat 7.1 support
• vmmouse support (Dan Kenigsberg)
• fix sdl window caption when keyboard is captured (Dan Kenigsberg)
• improve libkvm configure script (Jerone Young)
• improve bios compilation support on x86_64 hosts (Laurent Vivier)
• fix acpi processor reporting for Windows 2000 with the ACPI HAL (Sheng Yang)

kvm-45 [2 oct 2007]

• don't use page->private for guest pages (Izik Eidus)
• x86 emulator cleanups, simplifications, and fixes (Laurent Vivier, Qing He)
• apic round robin delivery mode cleanup (Qing He)
• merge qemu-cvs
• fix compilation on older kernels (Rusty Russell, Avi Kivity)
• reduce tap networking latency
• fix FC6 x86_64 booting with -no-kvm
• fix code dump on exception

kvm-44 [23 sep 2007]

• fix smp guest boot
• fix IDE emulation bug with newer guest kernels (S.Çağlar Onur)
• support VMware server as guest (Ryan Harper)
• fix smp race in shadow code (Izik Eidus)
• allow guest page faults to bypass kvm on Intel (performance boost)

kvm-43 [21 sep 2007]

• fix ioapic edge-triggered interrupt handling

kvm-42 [20 sep 2007]

• important host oops fix
• document -no-kvm-irqchip option in qemu help message (Carlo Marcelo Arenas Belon)
• acpi bios: export pci irqs as active high
• avoid redelivery of edge-triggered ioapic interrupts if already in service
• implement ioapic polarity
• fix x86 emulator merge problems (Nitin A Kamble, Laurent Vivier)
• fix x86 repne decoding (fixes OpenBSD boot regression) (Laurent Vivier)
• install kvm_para.h (Gerd Hoffman)

kvm-41 [19 sep 2007]

• refactor hypercall infrastructure for simplicity and better smp support (Anthony Liguori)
• fix ioapic level triggered interrupt redelivers (solves networking stalls)
• reduce efer reloads with 32-bit guests; minor performance improvement
• split x86 emulator decode and execute stages (Laurent Vivier)
• fix pic interrupt delivery (solves time going double speed on x86_64 Linux guests) (Qing He)
• adaptive live migration bandwidth limits (Uri Lublin)

kvm-40 [16 sep 2007]

• fix guest reboot (most scenarios)
• further x86 emulator work (Nitin A Kamble)
• compile fixes for older kernels
• make the external module work again

kvm-39 [12 sep 2007]

• provide div64_64() for older kernels
• improve emulation failure reporting
• more x86 emulator work (push imm8, pushf, call near) (Nitin A Kamble)
• don't use TPR shadow on i386 (Sheng Yang)

kvm-38 [12 sep 2007]

• fix fpu indication for Solaris (Amit Shah)
• Avoid GFP_NOWAIT allocation in mmu
• Fix runtime smp_processor_id() warning in lapic
• Move vcpu loop into subarch independent loop
• Rename kvm_arch_ops to kvm_x86_ops (Christian Ehrhardt)
• Fix missing "genapic" on i386 (Eddie Dong)
• Fix lapic hrtimer migration (Qing He)
• Fix lapic 64-bit division on i386 (Jindrich Makovicka)
• Simplify memory allocation ioctl (Laurent vivier)
• Keep control register shadows in sync (Rusty Russell)
• Retire invlpg (Rusty Russell)
• Expose get_cs_db_l_bits for kvm-lite (Rusty Russell)
• Fix network boot (Anthony Liguori)
• Round up memory in libkvm (Anthony Liguori)
• Fix option ROM loading (Anthony Liguori)
• Revert FACP ACPI change for Vista
• Fix segfault with -no-kvm
• lapic hrtimer external module compatibility (Qing He, Avi Kivity)
• improved (still imprefect) reboot
• better bios smp detection

kvm-37 [9 sep 2007]

• in-kernel lapic, ioapic, and pic (Eddie Dong, Qing He, Sheng Yang, Gregory Haskins, Dor Laor, Avi Kivity)
• split segment reload (vmx microoptimization) (Laurent Vivier)
• fix vga redraw regression (Izik Eidus)
• fix testsuite compilation with older assemblers (H. Peter Anvin)

kvm-36 [22 aug 2007]

• support guests with more than 2GB of RAM on 64-bit hosts (Izik Eidus)
• fix rare host oops on guest context switch
• avoid smp_call_function_single() warning on suspend/resume
• more real mode emulator work (Nitin A Kamble)
• Windows x64 support (Sheng Yang)
• close minor signal handling race
• carry bios in kvm source tree for easier maintenance
• fix -std-vga (Uri Lublin)
• advertise kvm in vnc window title (Matthew Kent)
• fix Windows SMP guests consuming cpu time when idle (Igor Lvovsky)

kvm-35 [15 aug 2007]

• fix kvm refusing to load on Core processors (Glauber de Oliveira Costa)
• improve qemu monitor handling CR/LF sequences (Jim Paris)
• fix compile warning in qemu (Luca Tettamanti)

kvm-34 [13 aug 2007]

• make kvm preemptible
• allow calling sleeping functions in the kvm exit handlers (Shaohua Li)
• this is a first step in getting guest swapping
• fix running kvm on nx-incapable host kernel on nx-capable hardware
• fix more fallback from the x86 emulator writeback changes (Aurelien Jarno, Avi Kivity)
• remove vmx specific code from subarch independent code (Gregory Haskins)
• allocate vcpus as needed (Rusty Russell)
• consolidate x86 emulator guest read/write code (Laurent Vivier)
• cleanup string pio instruction emulation (Laurent Vivier)
• ensure all cpus have the same vmx features (Sheng Yang)
• version string for external module
• disable long mode capability bit on 32-bit kernels
• fix qemu -isapc (Uri Lublin)
• fixes for smp live migration
  • this is still raw
• fix unhandled wrmsr MSR_CSTAR on i386 (Luca Tettamanti)
• some migration fixes (Jim Paris)
• the usual cleanups and minor fixes (various but mostly Rusty)

kvm-33 [23 jul 2007]

• fix massive performance regression

kvm-32 [23 jul 2007]

• fix oops with the slub allocator (CONFIG_SLUB)
• fix cmov instruction emulation, trashed by the mmio rmw fix
• fix rare, silent data corruption on writes that cross a page boundary and touch a page table (Aurelien Jarno, Avi Kivity)
• fix race between vm creation and vcpu hotunplug (Rusty Russell)
• fix guest turning on pae with invalid pdptres (Rusty Russell)
• adapt external module to changed kmem_cache_create() api
• allow external module on 2.6.22 i386 nonpae
• fix regression in network throughput caused by guest smp changes (Aurelien Jarno, Avi Kivity)
• live migration updates (Uri Lublin)
• minor cleanups (Nguyen Anh Quynh, Avi Kivity)

kvm-31 [19 jul 2007]

• a few cleanups that somehow evaded kvm-30 (Jeff Dike, Rusty Russell)
• allow the external module to compile on older kernels.

kvm-30 [19 jul 2007]

• minor fixes and cleanups (Jeff Dike, Rusty Russell, Avi Kivity)
• kernel pio string write (Eddie Dong)
• guest smp kernel fixes
• rdmsr and wrmsr real mode emulation
• fix real mode shadow pages aliasing nx large page shadows
• enable guest smp in qemu
• fix external module installer
• revert ide enable changes that caused an I/O regression

kvm-29 [12 jul 2007]

• live migration from 32-bit hosts to 64-bit hosts (Uri Lublin)
• monotonic timestamp counter on Intel
• more real mode support (Nitin A Kamble)
• infrastructure for in-kernel PIC and APIC (Gregory Haskins, Eddie Dong)
• fix read-modify-write to mmio (fixes F7 installer) (Luca Tettamanti)
• fix rebooting a long-running guest
• reliably detect if svm was disabled by bios (Joerg Roedel)
• suspend/resumes fixes (will not work with older kernels)
• fix nx confusion with large pages and real mode
• remove dependency on libuuid
• fix registers access in monitor/gdbstub (Anthony Liguori)
• minor fixes and cleanups (various)

kvm-28 [10 jun 2007]

• fix host oops on guest context switch
• many code cleanups (Nguyen Anh Quynh, others)
• prepare kernel for guest smp
• update libkvm for guest smp
• update testsuite for guest smp
• emulate hlt in real mode (avoids crash when booting from unformatted disk)
• initialize ata ports for Fedora 7 guests (Luca Tettamanti)

kvm-27 [3 jun 2007]

• use slab cache for mmu shadow pages
• make shadow pte updates atomic (for guest smp)
• general mmu cleanups

kvm-26 [27 may 2007]

• implement wbinvd emulation, triggered by Windows Vista
• compile fixes (Markus Rechberger, Avi Kivity)

kvm-25 [24 may 2007]

• massive performance increase (Eddie Dong)
• regenerate bios from latest bochs sources, hopefully fixing a regression with some guests
• some testsuite work (Anthony Lihuori, Eddie Dong, Avi Kivity)
• minor fixes (various)

kvm-24 [8 may 2007]

• fix oops loading kvm-intel module on i386 with highmem

kvm-23 [7 may 2007]

• OpenBSD 4.1 i386 support (Matthew Gregan)
• Fix host and guest crashes on reboot

kvm-22 [6 may 2007]

• Significant performance improvements (Anthony Liguori, Eddie Dong, Qing He, Avi Kivity)
• Fix longstanding bug: time runs at double speed on x86_64 Linux (Qing He)
• Windows Vista 32-bit support (Qing He, Jun Nakajima)
• Support for kvm abi 10 modules
• Minor updates

kvm-21 [27 apr 2007]

• fix regression on Core (not Core 2) processors
• performance improvements (Eddie Dong, Anthony Liguori)
• minor fixes

kvm-20 [24 apr 2007]

• Windows 2000 support
• performance enhancements
• patch against latest kernel tree included in tarball
• fix oops with 32-bit nonpae guests

kvm-19 [16 apr 2007]

• bug fixes
• memory aliasing api

kvm-18 [26 mar 2007]

• merged new userspace API
• revert the optimization which killed some 32-bit Linux guests
• reboot support on Intel hosts (AMD are already supported)
• better timekeeping under load (Uri Lublin)
• other minor fixes and cleanups

kvm-17 [25 mar 2007]

• live migration enhancements (Uri Lublin)
• better/working acpi support
• revert to unhacked qemu bios
• fix some 32-bit nonpae guests (*BSD)
• initial ballooning support
• random fixes

kvm-16 [7 mar 2007]

• bug fixes (including a nasty one on module load)
• use lanana assigned minor device number for /dev/kvm

kvm-15 [26 feb 2007]

• live migration with kvm (Uri Lublin)
• based on Anthony Liguori's qemu patches
• new userspace interface (work in progress)
• the usual random fixes

kvm-14 [19 feb 2007]

• qemu 0.9.0
• too many goodies to list
• kvm can no longer share qemu's bios on Intel hosts due to real mode trouble. use the supplied bios.
• migration now based on Anthony Liguori's live migration patches (Uri Lublin)
  • currently, only non-live migration is supported under kvm
• handle smi on host on AMD hosts (Joerg Roedel)
• random fixes

kvm-13 [8 feb 2007]

• add dirty page tracking in some corner cases for live migration
• fix lockups on nx-challenged hosts
• host suspend/resume
  • nobody's testing this, so it's probably broken
• host cpu hotplug support
• beginning of paravirt support (Ingo Molnar)
• guest reboot support (Markus Rechberger, Joerg Roedel)
• pio latency reduction (Anthony Liguori)
• stone age kernel compatibility (Markus Rechberger)
• the usual cleanups and stability fixes

kvm-12 [23 jan 2007]

• More migration work (Uri Lublin)
• savevm/loadvm (and migration) work on AMD (Leonard Norrgard)
• More guest support
• mmu testsuite and fixes
• Windows ACPI install/run support (Dor Laor)
• Fix host reboot on guest reboot on AMD (Joerg Roedel)

kvm-11 [11 jan 2007]

• stabilization fixes
• vmexit profiling (Ingo Molnar; requires Linux 2.6.20+)

kvm-10 [7 jan 2007]

• more hypercall work
• cleanup irq handling
• shadow page table caching
• migration fixes
• stabilization fixes

kvm-9 [31 dec 2006]

• API documentation (James Jacobsson)
• More stabilization fixes (Yoshimi Ichiyanagi, Ingo Molnar, Nguyen Anh Quynh)
• Interactivity improvements (Dor Laor)

kvm-8 [21 dec 2006]

• msr fixes (Michael Riepe)
• more guest support (Michael Riepe)
• random fixes
• fpu state corruption fix on AMD hosts

kvm-7 [12 dec 2006]

• prevent loading arch module on wrong hardware
• fix for macbooks
• other minor fixes

kvm-6 [11 dec 2006]

• AMD 32-bit host support (Anthony Liguori)
• more migration work
• stabilization
• improved performance
• improved guest support on AMD

kvm-5 [28 nov 2006]

• AMD SVM support (x86-64 hosts only)
• Preliminary live migration support
• 'make install' also installs kernel modules, if selected
• random fixes

kvm-4 [21 nov 2006]

• added the msr work
  • suspend/resume should work now
• more vmdk compatibility work
• random build updates

kvm-3 [15 nov 2006]

[Avi Kivity retained the natural number versioning after he contemplated the confusion that can arise from having releases 1, 2, and 0.3]

Kernel module

• make exit reason numbers explicit
• sync kernel module with -mm tree
  • asm constraint fixes
  • userspace interface blurb
  • segment restore across mode switch (fixes etherboot)
  • segment asm constraint fix (Bernhard Rosenkraenzer)
  • segment access cleanup

libkvm:

• better error reporting (Simon Kagstrom)
• 'make clean'
• attributions and license

kvmctl:

• add option to launch guest in 32-bit mode
• add test programs

qemu/kvm:

• autodetect kvm presence (Simon Kagstrom)

General

• fix host arch detection on debian
• fix ./configure on debian (Gildas)
• toplevel 'make clean'

?? [9 nov 2006]

• much easier to get running, see updated HOWTO
• now just one download, get yours while supplies last
• single qemu binary for kvm and non-kvm runs (Anthony Liguori)
• accompanying external kernel module package has all bugfixes folded in (plus a bit of cosmetics)

lkml submission v4 [5 nov 2006]

• [1]
• detect msrs on host dynamically. Avoids oopses on non-ia32e capable processors.
• web site: http://kvm.sourceforge.net
• slightly rediffed

lkml submission v3 [26 oct 2006]

• [2]
• mailing list: kvm-devel@public.gmane.org (http://lists.sourceforge.net/lists/listinfo/kvm-devel)
• applied code review comments
• fixed set_sregs() ioctl corrupting guest state if cr0.pe changed (a polite way of saying that loading a saved vm was broken)

lkml submission v2 [23 oct 2006]

• [3]
• fixed a lockup on i386 with host memory >= 4GB
• finer patch split to conform to vger limits
• minor fixes
• send through script to avoid mailer damage

lkml submission v1 [19 oct 2006]

• [4]