Re: [kvm-unit-tests RFC 0/4] KVM: arm64: Statistical Profiling Extension Tests

[Auger Eric <eric.auger@redhat.com>]

Hi Alexandru,

On 9/1/20 11:24 AM, Alexandru Elisei wrote:
> Hi Eric,
> 
> These patches are extremely welcome! I took over the KVM SPE patches from Andrew
> Murray, and I was working on something similar to help with development.
Cool.
> 
> The KVM series on the public mailing list work only by chance because it is
> impossible to reliably map the SPE buffer at EL2 when profiling triggers a stage 2
> data abort. That's because the DABT is reported asynchronously via the buffer
> management interrupt and the faulting IPA is not reported anywhere. I'm trying to
> fix this issue in the next iteration of the series, and then I'll come back to
> your patches for review and testing.
Sure. Looking forward to reviewing your respin.

Thanks

Eric
> 
> Thanks,
> 
> Alex
> 
> On 8/31/20 8:34 PM, Eric Auger wrote:
>> This series implements tests exercising the Statistical Profiling
>> Extensions.
>>
>> This was tested with associated unmerged kernel [1] and QEMU [2]
>> series.
>>
>> Depending on the comments, I can easily add other tests checking
>> more configs, additional events and testing migration too. I hope
>> this can be useful when respinning both series.
>>
>> All SPE tests can be launched with:
>> ./run_tests.sh -g spe
>> Tests also can be launched individually. For example:
>> ./arm-run arm/spe.flat -append 'spe-buffer'
>>
>> The series can be found at:
>> https://github.com/eauger/kut/tree/spe_rfc
>>
>> References:
>> [1] [PATCH v2 00/18] arm64: KVM: add SPE profiling support
>> [2] [PATCH 0/7] target/arm: Add vSPE support to KVM guest
>>
>> Eric Auger (4):
>>   arm64: Move get_id_aa64dfr0() in processor.h
>>   spe: Probing and Introspection Test
>>   spe: Add profiling buffer test
>>   spe: Test Profiling Buffer Events
>>
>>  arm/Makefile.common       |   1 +
>>  arm/pmu.c                 |   1 -
>>  arm/spe.c                 | 463 ++++++++++++++++++++++++++++++++++++++
>>  arm/unittests.cfg         |  24 ++
>>  lib/arm64/asm/barrier.h   |   1 +
>>  lib/arm64/asm/processor.h |   5 +
>>  6 files changed, 494 insertions(+), 1 deletion(-)
>>  create mode 100644 arm/spe.c
>>
>