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List:       linux-s390
Subject:    Re: [PATCH v3 00/10] s390x: smp: Improve smp code part 2
From:       David Hildenbrand <david () redhat ! com>
Date:       2020-04-30 15:00:33
Message-ID: bfececd9-e66d-46db-e3ed-7d5a07a6c35d () redhat ! com
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On 29.04.20 16:35, Janosch Frank wrote:
> Let's continue cleaning up the smp test and smp related functions.
> 
> We add:
>    * Test for external/emergency calls after reset
>    * Test SIGP restart while running
>    * SIGP stop and store status while running
>    * CR testing on reset
> 
> We fix:
>    * Proper check for sigp completion
>    * smp_cpu_setup_state() loop and return address in r14
> 
> v3:
> 	* Added some rev-bys and acks
> 	* Add a workaround for stop and store status
> 	* Beautified cr checking with loop
> 
> v2:
> 	* Added some rev-bys and acks
> 	* Explicitly stop and start cpu before hot restart test
> 
> GIT: https://github.com/frankjaa/kvm-unit-tests/tree/smp_cleanup2
> 
> Janosch Frank (10):
>   s390x: smp: Test all CRs on initial reset
>   s390x: smp: Dirty fpc before initial reset test
>   s390x: smp: Test stop and store status on a running and stopped cpu
>   s390x: smp: Test local interrupts after cpu reset
>   s390x: smp: Loop if secondary cpu returns into cpu setup again
>   s390x: smp: Remove unneeded cpu loops
>   s390x: smp: Use full PSW to bringup new cpu
>   s390x: smp: Wait for sigp completion
>   s390x: smp: Add restart when running test
>   s390x: Fix library constant definitions
> 
>  lib/s390x/asm/arch_def.h |   8 ++--
>  lib/s390x/smp.c          |  11 +++++
>  lib/s390x/smp.h          |   1 +
>  s390x/cstart64.S         |   5 +-
>  s390x/smp.c              | 101 +++++++++++++++++++++++++++++++++++----
>  5 files changed, 112 insertions(+), 14 deletions(-)
> 

I already had #1 applied. Applied everything else except #8, that might
require more thought. Gave it a test under z/VM and TCG.

Under z/VM I get:

ABORT: smp: cpu reset: Unexpected external call interrupt (code 0x1201):
on cpu 1 at 0x110f4

Which - I think - is expected with older kernels (on 5.4.13) that miss
the reset of local interrupts via the new kernel interface

https://github.com/davidhildenbrand/qemu.git s390-tcg-next

Thanks!

-- 
Thanks,

David / dhildenb

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