diff options
| author |   Robert Yang <liezhi.yang@windriver.com> | 2015-06-25 01:56:03 -0700 |
|---|---|---|
| committer | Robert Yang <liezhi.yang@windriver.com> | 2015-06-25 18:26:06 -0700 |
| commit | ec38a9b641108bba14f8be1c71c50cc85e6f9f86 (patch) | |
| tree | bffd9d5f7437c6c88969bc758ba330a9df529ae6 /scripts/runqemu-internal | |
| parent | dd6a444cfc1ef527520a0e3490b6a243f0e7679c (diff) | |
| download | openembedded-core-contrib-rbt/qemu_v2.tar.gz | |
runqemu: enable kvm when use tap under sudorbt/qemu_v2
Enable kvm support automatically when use tap interface under sudo, the
thought is, if sudo works well, and qemu-native has been built with kvm
support, and kvm can be enabled, then enable it, it can be disabled by
nokvm option.
The previous command:
$ runqemu qemux86 kvm
may not work since it checks the current user's read/write permission on
/dev/kvm and /dev/vhost-net but failed without sudo, it can't use sudo
to check them since sudo is not a must, sudo is only required when need
create tap interface, this patch can enable it automatically.
Enable kvm can improve qemu's performance a lot, when test perl-5.22's
lib/warnings.t on qemux86-64, 70 times improved.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Diffstat (limited to 'scripts/runqemu-internal')
| -rwxr-xr-x | scripts/runqemu-internal | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/runqemu-internal b/scripts/runqemu-internal index 694815fb74..25533ecef5 100755 --- a/scripts/runqemu-internal +++ b/scripts/runqemu-internal @@ -217,6 +217,19 @@ else sudo $QEMUIFUP $USERID $GROUPID $OECORE_NATIVE_SYSROOT return 1 fi + + # Enale kvm when possible since sudo works well, if + # /usr/include/linux/kvm.h exists, qemu-native is built with kvm + # support. + if [ "$KVM_ENABLED" = "maybe" -a -n "$KVM_CAPABLE" -a \ + -e /dev/kvm -a -e /dev/vhost-net -a -f /usr/include/linux/kvm.h ] && \ + [ "$MACHINE" = "qemux86" -o "$MACHINE" = "qemux86-64" ]; then + echo "Enabling KVM automatically, can be disabled by nokvm option" + SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -enable-kvm" + KVM_ACTIVE="yes" + KVM_SUDO="sudo" + fi + LOCKFILE="$LOCKDIR/$tap" echo "Acquiring lockfile for $tap..." acquire_lock $LOCKFILE @@ -685,6 +698,7 @@ if [ "x$SERIALSTDIO" = "x1" ]; then fi echo "Running $QEMU..." +[ -n "$KVM_SUDO" ] && QEMUBIN="$KVM_SUDO $QEMUBIN" # -no-reboot is a mandatory option - see bug #100 if [ "$FSTYPE" = "vmdk" ]; then echo $QEMUBIN $VM $QEMUOPTIONS $SERIALOPTS -no-reboot $SCRIPT_QEMU_OPT $SCRIPT_QEMU_EXTRA_OPT |