[v1,0/4] s390x: Testing the Subchannel I/O

Message

Pierre Morel Nov. 13, 2019, 12:23 p.m. UTC

Goal of the series is to have a framwork to test Channel-Subsystem I/O with
QEMU/KVM.

To be able to support interrupt for CSS I/O and for SCLP we need to modify
the interrupt framework to allow re-entrant interruptions.

Making the interrupt handler weak allows the test programm to define its own
interrupt handler. We need to do special work under interrupt like acknoledging
the interrupt.

Being working on PSW bits to allow I/O interrupt, we define all PSW bits in a
dedicated file.

The simple test tests the I/O reading by the SUB Channel. It needs QEMU to
be patched to have the pong device defined.
The pong device answers, for now, with a Hello World to the read request.


Pierre Morel (4):
  s390x: saving regs for interrupts
  s390x: Define the PSW bits
  s390x:irq: make IRQ handler weak
  s390x: Testing the Subchannel I/O read

 lib/s390x/asm/arch_bits.h |  32 ++++++
 lib/s390x/asm/arch_def.h  |   6 +-
 lib/s390x/asm/interrupt.h |  15 ++-
 lib/s390x/css.h           | 244 ++++++++++++++++++++++++++++++++++++++++++++++
 lib/s390x/css_dump.c      | 141 +++++++++++++++++++++++++++
 lib/s390x/interrupt.c     |  16 +--
 s390x/Makefile            |   2 +
 s390x/css.c               | 222 +++++++++++++++++++++++++++++++++++++++++
 s390x/cstart64.S          |  30 ++++--
 s390x/unittests.cfg       |   4 +
 10 files changed, 686 insertions(+), 26 deletions(-)
 create mode 100644 lib/s390x/asm/arch_bits.h
 create mode 100644 lib/s390x/css.h
 create mode 100644 lib/s390x/css_dump.c
 create mode 100644 s390x/css.c

Comments

Thomas Huth Nov. 13, 2019, 12:35 p.m. UTC | #1

Hi Pierre!

Meta-comment: Please use "[kvm-unit-tests PATCH ...]" in the subject for
future kvm-unit-tests patches.

On 13/11/2019 13.23, Pierre Morel wrote:
[...]
> The simple test tests the I/O reading by the SUB Channel. It needs QEMU to
> be patched to have the pong device defined.

Are you going to send QEMU patches for this? I assume that's a
prerequisite for this patch series?

 Thomas

Pierre Morel Nov. 13, 2019, 12:43 p.m. UTC | #2

On 2019-11-13 13:35, Thomas Huth wrote:
>   Hi Pierre!
>
> Meta-comment: Please use "[kvm-unit-tests PATCH ...]" in the subject for
> future kvm-unit-tests patches.


Oh sorry, I didn't notice, thanks.

Will take care for the next series.


>
> On 13/11/2019 13.23, Pierre Morel wrote:
> [...]
>> The simple test tests the I/O reading by the SUB Channel. It needs QEMU to
>> be patched to have the pong device defined.
> Are you going to send QEMU patches for this? I assume that's a
> prerequisite for this patch series?
>
>   Thomas
>
Yes I will.

Regards,

Pierre