[PATCH i-g-t v6 09/17] tests/xe_exec_sip: Introduce invalid instruction tests

[Zbigniew Kempczyński]

On Thu, Sep 05, 2024 at 11:28:04AM +0200, Christoph Manszewski wrote:
> From: Andrzej Hajda <andrzej.hajda at intel.com>
> 
> Xe2 and earlier gens are able to handle very limited set of invalid
> instructions - only illegal and undefined opcodes, other errors in
> instruction can cause undefined behavior.
> Illegal/undefined opcode results in:
> - setting illegal opcode status bit - cr0.1[28],
> - calling SIP if illegal opcode bit is enabled - cr0.1[12].
> cr0.1[12] can be enabled directly from the thread or by thread dispatcher
> from Interface Descriptor Data provided to COMPUTE_WALKER instruction.
> 
> Implemented cases:
> - check if SIP is not called when exception is not enabled,
> - check if SIP is called when exception is enabled from EU thread,
> - check if SIP is called when exception is enabled from COMPUTE_WALKER
> 
> Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
> Cc: Mika Kuoppala <mika.kuoppala at intel.com>
> Cc: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
> Signed-off-by: Christoph Manszewski <christoph.manszewski at intel.com>

I've some observation - tests are passing but I've doubts regarding
their completion. I mean I observe hang and test report success after
job timeout.

--
Zbigniew