On 2011-08-26 23:31, Lucas Meneghel Rodrigues wrote: > Hi folks, > > I've recently sent a patch porting the -testdev device from qemu-kvm.git > to qemu.git, and I went ahead and started running the unittests on > qemu.git. It's still not integrated to our test grid, I just ran it in > my laptop, which runs a fairly recent linux 3.0 kernel (which in Fedora > 15 they are calling 2.6.40 :)) > > > We had a fair number of failures. Right now, avi's kernel + qemu-kvm.git > only yields an apic failure,
Not for me. Or did you run the test with -no-kvm-irqchip (see below)?
> so I guess we need to start investigating
> the failures. If we are going to get qemu-kvm and qemu to merge
> eventually we need to sort out all the issues.
>
>> 08/26 17:12:39 ERROR| kvm:0102| Test failed: TestFail: Unit
>> tests failed: apic vmexit access hypercall idt_test msr sieve xsave
>> svm kvmclock_test
apic: First error is related to user space APIC exposing a different
version than the in-kernel APIC. The version is coupled to the
CPU model, but neither KVM nor QEMU get this right so far. I
think we already had complaints about the too old version QEMU
returns but no patches to fix it properly.
Then there is a self-ipi issue under KVM but not TCG (or
in-kernel irqchip), need to look closer. Also affects eventinj.
Finally, this test stumbles over the bogus isa_get_irq in
testdev.
sieve: Works but takes a bit longer under TCG.
svm: Can't test with KVM on Intel, shows one bug and a lockup in TCG
mode.
All others mentioned above work fine with KVM but have issues under TCG.
I had a brief look at the obvious cases:
kvmclock_test: Can't work as we do not emulate the PV clock in TCG
mode.
access: Can't work as TCG's x86 model ignores segment limits
(long-known limitation).
The others are likely bugs/shortcomings in the TCG model.
Jan
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