Re: [PATCH v2 4/5] KVM: selftests: Add exception handling support for aarch64

[Marc Zyngier <maz@kernel.org>]

On 2021-05-12 09:19, Auger Eric wrote:
> Hi Ricardo,
> 
> On 5/12/21 9:27 AM, Ricardo Koller wrote:
>> On Fri, May 07, 2021 at 04:08:07PM +0200, Auger Eric wrote:
>>> Hi Ricardo,
>>> 
>>> On 5/6/21 9:14 PM, Ricardo Koller wrote:
>>>> On Thu, May 06, 2021 at 02:30:17PM +0200, Auger Eric wrote:
>>>>> Hi Ricardo,
>>>>> 
>>>> 
>>>> Hi Eric,
>>>> 
>>>> Thank you very much for the test.
>>>> 
>>>>> On 5/3/21 9:12 PM, Ricardo Koller wrote:
>>>>>> On Mon, May 03, 2021 at 11:32:39AM +0100, Marc Zyngier wrote:
>>>>>>> On Sat, 01 May 2021 00:24:06 +0100,
>>>>>>> Ricardo Koller <ricarkol@google.com> wrote:
>>>>>>>> 
>>>>>>>> Add the infrastructure needed to enable exception handling in 
>>>>>>>> aarch64
>>>>>>>> selftests. The exception handling defaults to an 
>>>>>>>> unhandled-exception
>>>>>>>> handler which aborts the test, just like x86. These handlers can 
>>>>>>>> be
>>>>>>>> overridden by calling vm_install_vector_handler(vector) or
>>>>>>>> vm_install_exception_handler(vector, ec). The unhandled 
>>>>>>>> exception
>>>>>>>> reporting from the guest is done using the ucall type introduced 
>>>>>>>> in a
>>>>>>>> previous commit, UCALL_UNHANDLED.
>>>>>>>> 
>>>>>>>> The exception handling code is heavily inspired on 
>>>>>>>> kvm-unit-tests.
>>>>> 
>>>>> running the test on 5.12 I get
>>>>> 
>> 
>> Hi Eric,
>> 
>> I'm able to reproduce the failure you are seeing on 5.6, specifically
>> with kernels older than this commit:
>> 
>>   4942dc6638b0 KVM: arm64: Write arch.mdcr_el2 changes since last 
>> vcpu_load on VHE
>> 
>> but not yet on v5.12. Could you share the commit of the kernel you are
>> testing, please?
> 
> my host is a 5.12 kernel (8404c9fbc84b)

Time to compare notes then. What HW are you using? Running VHE or not?

Thanks,

         M.
-- 
Jazz is not dead. It just smells funny...