kvm-82 release

This release adds support for nested virtualization, a feature which allows you to run kvm (and possibly other hypervisors) inside a guest. This is an experimental feature and is only available on AMD hosts.

There are fixes included for a couple of minor vulnerabilities: one for the slirp stack (-net user), which is not usually used in production, and another in the vnc server, which allows malicious users to cause a VM to hang.

Changes from kvm-81:
- merge qemu-svn
- uuid support
- fix CVE-2007-5729 (slirp vulnerability)
- fix CVE-2008-2382 (vnc denial of service)
- better scsi support
- pci subsystem id for pci devices
- this will cause Windows guest to rediscover hardware
- improved I/O parallelism
- ppc kvm support
- hpet support
- not fully integrated yet
- monitor 'info status' command
- merge bochs-bios-cvs
- uuid support
- prepare for S3 sleep
- merge vgabios-cvs
- much improved guest debugging (Jan Kiszka)
- both debugger in guest and debugger in host
- fix kvm makefile for separate object dir (Andi Kleen)
- nested svm (Alexander Graf)
- run kvm in kvm in kvm...
- fix ia64 register and stack access from userspace (Jes Sorensen)
- don't treat a global pte as global if cr4.pge is clear
- fixes Vista x86 smp failure on boot
- properly lock virtual i8259 interrupt controller
- fix large host pages invlpg/resync
- fixes oops when using host hugetlbfs
- fix vmload instruction misemulated as lidt

Notes:
If you use the modules bundled with kvm-82, you can use any version
of Linux from 2.6.16 upwards. You may also use kvm-81 userspace with the kvm modules provided by Linux 2.6.25 or above. Some features may only be available in newer releases.

http://kvm.qumranet.com

I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

When building KVM-82 on F10 I get the following errors:

make[2]: Entering directory `/usr/src/kernels/2.6.27.9-159.fc10.x86_64'
LD /opt/kvm-82/kernel/x86/built-in.o
CC [M] /opt/kvm-82/kernel/x86/svm.o
In file included from /opt/kvm-82/kernel/x86/external-module-compat.h:10,

                 from <command-line>:2:

/opt/kvm-82/kernel/x86/../external-module-compat-comm.h:587: error:
conflicting types for 'hrtimer_add_expires_ns' include/linux/hrtimer.h:245: error: previous definition of 'hrtimer_add_expires_ns' was here /opt/kvm-82/kernel/x86/../external-module-compat-comm.h:592: error:
conflicting types for 'hrtimer_get_expires' include/linux/hrtimer.h:250: error: previous definition of 'hrtimer_get_expires' was here /opt/kvm-82/kernel/x86/../external-module-compat-comm.h:597: error:
conflicting types for 'hrtimer_get_expires_ns' include/linux/hrtimer.h:260: error: previous definition of 'hrtimer_get_expires_ns' was here /opt/kvm-82/kernel/x86/../external-module-compat-comm.h:602: error:
conflicting types for 'hrtimer_start_expires' include/linux/hrtimer.h:341: error: previous definition of 'hrtimer_start_expires' was here
make[4]: *** [/opt/kvm-82/kernel/x86/svm.o] Error 1 make[3]: *** [/opt/kvm-82/kernel/x86] Error 2
make[2]: *** [_module_/opt/kvm-82/kernel] Error 2
make[2]: Leaving directory `/usr/src/kernels/2.6.27.9-159.fc10.x86_64' make[1]: *** [all] Error 2
make[1]: Leaving directory `/opt/kvm-82/kernel'
make: *** [kernel] Error 2

Has anyone else seen this?

Mark Bidewell

the same problem exists with the latest stock kernel on fedora 9.

you may comment out the conflicting definitions in kvm-82/kernel/external-module-compat-comm.h to fix the build problem.

bye,
Andreas Winkelbauer

on centos-5, kernel/include-compat/asm/msr-index.h gives dozens of such warnings during compile:
In file included from /home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/asm/kvm_host.h:65,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/linux/kvm_host.h:67,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/lapic.c:60:
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include-compat/asm/msr-index.h:304:1:
warning: "MSR_P4_U2L_ESCR0" redefined
In file included from include/asm/processor.h:16,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/asm/kvm_para.h:89,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/linux/kvm_para.h:63,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/../external-module-compat-comm.h:14,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/external-module-compat.h:9,
from <command line>:1:
include/asm/msr.h:407:1: warning: this is the location of the previous definition
In file included from /home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/asm/kvm_host.h:65,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/linux/kvm_host.h:67,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/lapic.c:60:
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include-compat/asm/msr-index.h:305:1:
warning: "MSR_P4_U2L_ESCR1" redefined
In file included from include/asm/processor.h:16,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/asm/kvm_para.h:89,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/include/linux/kvm_para.h:63,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/../external-module-compat-comm.h:14,
from
/home/robot/rpm/BUILD/kvm-kmod-82/_kmod_build_/kernel/x86/external-module-compat.h:9,

  Levente                               "Si vis pacem para bellum!"