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Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
qemuProcessVerifyHypervFeatures is supposed to check whether all requested hyperv features were actually honored by QEMU/KVM. This is done by checking the corresponding CPUID bits reported by the virtual CPU. In other words, it doesn't work for string properties, such as VIR_DOMAIN_HYPERV_VENDOR_ID (there is no CPUID bit we could check). We could theoretically check all 96 bits corresponding to the vendor string, but luckily we don't have to check the feature at all. If QEMU is too old to support hyperv features, the domain won't even start. Otherwise, it is always supported. Without this patch, libvirt refuses to start a domain which contains <features> <hyperv> <vendor_id state='on' value='...'/> </hyperv> </features> reporting internal error: "unknown CPU feature __kvm_hv_vendor_id. This regression was introduced by commit v3.1.0-186-ge9dbe7011, which (by fixing the virCPUDataCheckFeature condition in qemuProcessVerifyHypervFeatures) revealed an old bug in the feature verification code. It's been there ever since the verification was implemented by commit v1.3.3-rc1-5-g95bbe4bf5, which effectively did not check VIR_DOMAIN_HYPERV_VENDOR_ID at all. https://bugzilla.redhat.com/show_bug.cgi?id=1439424 Signed-off-by: Jiri Denemark <jdenemar@redhat.com> |
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.gnulib@94386a1366 | ||
build-aux | ||
daemon | ||
docs | ||
examples | ||
gnulib | ||
include/libvirt | ||
m4 | ||
po | ||
src | ||
tests | ||
tools | ||
.ctags | ||
.dir-locals.el | ||
.gitignore | ||
.gitmodules | ||
.mailmap | ||
AUTHORS.in | ||
autobuild.sh | ||
autogen.sh | ||
bootstrap | ||
bootstrap.conf | ||
cfg.mk | ||
ChangeLog-old | ||
config-post.h | ||
configure.ac | ||
COPYING | ||
COPYING.LESSER | ||
HACKING | ||
libvirt-admin.pc.in | ||
libvirt-lxc.pc.in | ||
libvirt-qemu.pc.in | ||
libvirt.pc.in | ||
libvirt.spec.in | ||
Makefile.am | ||
Makefile.nonreentrant | ||
mingw-libvirt.spec.in | ||
README | ||
README-hacking | ||
run.in | ||
TODO |
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>