Messages in this thread | | | From | Haibo Xu <> | Date | Fri, 15 Sep 2023 14:21:41 +0800 | Subject | Re: [PATCH v3 9/9] KVM: riscv: selftests: Add sstc timer test |
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On Thu, Sep 14, 2023 at 5:52 PM Andrew Jones <ajones@ventanamicro.com> wrote: > > On Thu, Sep 14, 2023 at 09:37:03AM +0800, Haibo Xu wrote: > > Add a KVM selftests to validate the Sstc timer functionality. > > The test was ported from arm64 arch timer test. > > I just tried this test out. Running it over and over again on QEMU I see > it works sometimes, but it frequently fails with the > GUEST_ASSERT_EQ(config_iter + 1, irq_iter) assert and at least once I > also saw the __GUEST_ASSERT(xcnt >= cmp) assert. >
Good catch!
I can also reproduce this issue and it is a common problem for both arm64 and riscv because it also happens in a arm64 Qemu VM.
It seems like a synchronization issue between host and guest shared variables. Will double check the test code.
> Thanks, > drew
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