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Just adding `-device virtio-rng-pci' to the QEMU invocation will
add the device with a default host backend. As of QEMU 1.3+,
the default backend is to use the host's /dev/random as a
source of entropy. [1]
When the entropy pool is empty, reads from /dev/random will
block until additional environmental noise is gathered. [2]
For Yocto, if call runqemu frequently, it will consume lots
of host's /dev/random, and kernel finish crng init in guest get
more and more slowly.
Here are 4 times runqemu boot test:
[ 3.464432] random: crng init done
[ 20.874030] random: crng init done
[ 23.583589] random: crng init done
[ 23.858945] random: crng init done
Modify entropy source to /dev/urandom device on the host which
returns random bytes using a pseudorandom number generator seeded
from the entropy pool. Reads from this device do not block and
kernel finish crng init in guest will not delay.
Of course, the side effect is obviously, we lost the quality of
randomness, but the modification is only on runqemu script
rather than real embedded device, and it benefits oeqa efficiency
in which many cases call runqemu especially multiple oeqa builds
on one host.
After apply the fix:
[ 3.364670] random: crng init done
[ 4.619061] random: crng init done
[ 3.403897] random: crng init done
[ 3.450717] random: crng init done
[1] https://wiki.qemu.org/Features/VirtIORNG
[2] http://man7.org/linux/man-pages/man4/random.4.html
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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After commit e8b1c653946ef921b65d47e52aea0dc530ef4286, we started seeing
errors like the following during boot on genericx86 machines:
uvesafb: failed to execute /sbin/v86d
uvesafb: probe of uvesafb.0 failed with error -22
uvesafb: vbe_init() failed with -22
uvesafb: Getting VBE info block failed (eax=0x4f00, err=-2)
These were caused because the uvesa module was being loaded during boot,
when it is only meant to be loaded on qemu according to:
6af89812e8a9931ffed63768ed85367519bf7aef
Since genericx86-common.inc includes qemuboot-x86, the module also tries
to be loaded on genericx86 machines, this patch removes the instruction from
qemuboot-x86 and adds it in specific to both qemux86 machines confs so
it is correctly loaded only on those.
[YOCTO #11879]
(From OE-Core rev: 261f9c382121c73b72556a151fdd4c7938b32a92)
Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Replace the deprecated '-usbdevice' option with '-device usb-xx' option.
This would fix runqemu boot error like below.
'-usbdevice' is deprecated, please use '-device usb-...' instead
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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for uvesafb instead of fbsetup init script
* also add UVESA_MODE variable for easier change of resolution and respect it in QB_KERNEL_CMDLINE_APPEND
as well
* don't use init script just to call modprobe
* I wasn't able to test this all the way with runqemu, because runqemu
doesn't work on my system, but I've verified that the right params
appear there and that I can easily change UVESA_MODE from
conf/local.conf, the modules.d and modprobe.d files look OK:
OE qemux86@ ~/build/oe-core/tmp-glibc/deploy/images/qemux86/core-image-sato-qemux86-20170427212613.rootfs
$ cat etc/modules-load.d/uvesafb.conf
uvesafb
OE qemux86@ ~/build/oe-core/tmp-glibc/deploy/images/qemux86/core-image-sato-qemux86-20170427212613.rootfs
$ cat etc/modprobe.d/uvesafb.conf
options uvesafb mode_option=1600x1200-32
so I'll be able to drop this KERNEL_MODULE_AUTOLOAD +
KERNEL_MODULE_PROBECONF from my DISTRO conf.
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
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Currently, the qemu CPUs for are specified as generic, but the built
artifacts are not. For example, we build x86-64 artifacts targeting
core2duo but run them in qemu with generic qemu/kvm CPUs. This causes
some packages that take advantage of the host architecture to crash
because they try to use CPU features not advertised by qemu. As an
example, Qt uses ssse3. When artifacts linked against Qt and built
targeting core2duo attempt to run on a generic qemu/kvm CPU, we get
the following crash:
Incompatible processor. This Qt build requires the following features:
ssse3
We could fix this by making packages like Qt not take advantage of CPU
features. However, we will probably keep facing similar issues over
time, so it's better to resolve them in a more enduring way.
Fix this by making the qemu -cpu arguments match the built artifacts.
Signed-off-by: Martin Kelly <mkelly@xevo.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Fixed:
- Add QB_NETWORK_DEVICE to set network device, it will be used by both
slirp and tap.
- Set QB_NETWORK_DEVICE to "-device virtio-net-pci" in qemuboot.bbclass
but runqemu will default to "-device e1000" when QB_NETWORK_DEVICE is
not set, this is because oe-core's qemu targets support
virtio-net-pci, but the one outside of oe-core may not,
"-device e1000" is more common.
- Set hostfwd by default: 2222 -> 22, 2323 -> 23, and it will choose a
usable port when the one like 222 is being used. This can avoid
conflicts when multilib slirp qemus are running. We can forward more
ports by default if needed, and bsp.conf can custom it.
- Use different mac sections for slirp and tap to fix conflicts when
running both of them on the same host.
[YOCTO #7887]
CC: Nathan Rossi <nathan@nathanrossi.com>
CC: Randy Witt <randy.e.witt@linux.intel.com>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
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Using 'slirp' as a command line option to runqemu will start QEMU
with user mode networking instead of creating tun/tap devices.
SLIRP does not require root access. By default port 2222 on the
host will be mapped to port 22 in the guest. The default port
mapping can be overwritten with the QB_SLIRP_OPT variable e.g.
QB_SLIRP_OPT = "-net nic,model=e1000 -net user,hostfwd=tcp::2222-:22"
Signed-off-by: Todor Minchev <todor.minchev@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
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Bring across the comment that was in runqemu regarding why the
virtio-rng-pci device was needed. This comment is added to each location
where the virtio-rng-pci device is added.
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Not all QEMU machines (outside of those available in OE-Core) are
capable of using the virtio-rng-pci device due to various machine models
not having a pci/virtio bus. This makes it such that the use of the
'-device virtio-rng-pci' flag to QEMU is machine specific.
This patch removes the general addition of the flag to all runqemu
targets and adds the flag into the QB_OPT_APPEND for all the qemu*
machines in OE-Core that support its use (which is all of them).
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
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This causes the default timeout to be set to infinity, it will still report out
every 5000 milliseconds
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Add qemuboot-x86.inc to reduce duplicated code, the x86/x86_64 bsps
which can be boot by runqemu can require qemuboot-x86.inc.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Hongxu Jia
Alejandro Hernandez
Chen Qi
Martin Jansa
Martin Kelly
Robert Yang
Todor Minchev
Nathan Rossi
Saul Wold