8:51 a.m.
Libvirt compiles fine on aarch64. You will need to configure with
--without-dtrace as systemtap tracepoints are pretty broken, giving
lots of strange compile-time errors/link failures in both libvirt and qemu.
The test suite fails, see attachment.
Note this is all running under qemu-arm64 userspace emulation[1], so
certain things are expected to be a bit different.
In particular, any aarch64 binary which the test suite runs is
actually run under the qemu-arm64 interpreter (using binfmt). I'm
guessing this explains the extra file descriptor in some tests.
Also qemu intercepts system calls and thunks them into host system
calls (an x86-64 host in this case), and its support for IPv6 seems
shaky at best.
Rich.
[1]
http://rwmj.wordpress.com/2013/12/22/how-to-run-aarch64-binaries-on-an-x8...
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9:08 a.m.
On Wed, Jan 01, 2014 at 02:51:30PM +0000, Richard W.M. Jones wrote:
In particular, any aarch64 binary which the test suite runs is
actually run under the qemu-arm64 interpreter (using binfmt). I'm
guessing this explains the extra file descriptor in some tests.
More precisely, qemu opens a file descriptor for the binary, and then
seems to leak that fd across fork/exec. Compare:
On the host:
$ ls -l /proc/self/fd
total 0
lrwx------. 1 rjones rjones 64 Jan 1 15:04 0 -> /dev/pts/7
lrwx------. 1 rjones rjones 64 Jan 1 15:04 1 -> /dev/pts/7
lrwx------. 1 rjones rjones 64 Jan 1 15:04 2 -> /dev/pts/7
lr-x------. 1 rjones rjones 64 Jan 1 15:04 3 -> /proc/18301/fd
In the qemu chroot:
$ ./arm64-chroot.sh
# ls -l /proc/self/fd
total 0
lrwx------. 1 root root 64 Jan 1 15:04 0 -> /dev/pts/7
lrwx------. 1 root root 64 Jan 1 15:04 1 -> /dev/pts/7
lrwx------. 1 root root 64 Jan 1 15:04 2 -> /dev/pts/7
lr-x------. 1 root root 64 Jan 1 15:04 3 -> /usr/bin/bash
lr-x------. 1 root root 64 Jan 1 15:04 4 -> /usr/bin/ls
lr-x------. 1 root root 64 Jan 1 15:04 5 -> /proc/18331/fd
So anything which is testing file descriptors should probably be
skipped until we can afford to run this on real hardware or qemu gets
system emulation of aarch64.
Rich.
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Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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9:34 a.m.
On Wed, Jan 01, 2014 at 02:51:30PM +0000, Richard W.M. Jones wrote:
FAIL: sysinfotest
=================
TEST: sysinfotest
1) aarch64 sysinfo ...
Offset 0
Expect [<sysinfo type='smbios'>
</sysinfo>
]
Actual [<sysinfo type='smbios'>
<processor>
<entry name='socket_destination'>0</entry>
<entry name='type'>AArch64 Processor rev 0 (aarch64) </entry>
</processor>
<processor>
<entry name='socket_destination'>1</entry>
<entry name='type'>AArch64 Processor rev 0 (aarch64)</entry>
</processor>
</sysinfo>
]
... FAILED
/proc/cpuinfo is emulated by qemu by intercepting any system call
which tries to open that file. Under qemu:
$ cat /proc/sysinfo
/bin/cat: /proc/sysinfo: No such file or directory
$ cat /proc/cpuinfo
Processor : AArch64 Processor rev 0 (aarch64)
processor : 0
BogoMIPS : 200.00
Features : fp asimd
CPU implementer : 0x41
CPU architecture: AArch64
CPU variant : 0x0
CPU part : 0xd00
CPU revision : 0
Hardware : V2P-AARCH64
However my understanding of this test is that it doesn't use
/proc/cpuinfo from the system, but uses the test data from
tests/sysinfodata/aarch64cpuinfo.data, and since it is using fixed
test data, the test output should be identical.
Therefore this appears to be a genuine libvirt bug. I will post a
patch in a few minutes.
FAIL: virnetsockettest
======================
TEST: virnetsockettest
Cannot identify IPv4/6 availability
This one fails because:
getifaddrs: Address family not supported by protocol
getifaddrs first calls socket(PF_NETLINK, SOCK_RAW, 0) [see netlink(7)].
This seems firmly in the category of qemu emulation failure, so I
think we should ignore it.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
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10:03 a.m.
On Wed, Jan 01, 2014 at 03:34:33PM +0000, Richard W.M. Jones wrote:
On Wed, Jan 01, 2014 at 02:51:30PM +0000, Richard W.M. Jones wrote:
> FAIL: sysinfotest
> =================
In fact, since this test is entirely test-data-driven, why does the
test contain arch-specific sections at all?
Rich.
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Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org
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Richard W.M. Jones