Merge branch 's390x-next-2022-06' into 'master'

s390x: some migration tests and gcc12 support

See merge request kvm-unit-tests/kvm-unit-tests!33

s390x: Introduce symbol for lowcore and use it

This gets rid of bunch of pointers pointing to the lowcore used in
various places and replaces it with a unified way of addressing the
lowcore.
The new

s390x: Introduce symbol for lowcore and use it

This gets rid of bunch of pointers pointing to the lowcore used in
various places and replaces it with a unified way of addressing the
lowcore.
The new symbol is not a pointer. While this will lead to worse code
generation (cannot use register 0 for addressing), that should not
matter too much for kvm unit tests.
Since the lowcore is located per definition at address 0, the symbol is
defined via the linker scripts.
The symbol also will be used to create pointers that the compiler cannot
warn about as being outside the bounds of an array.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220608122953.1051952-2-scgl@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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Merge branch 's390x-next-2022-04' from imbrenda into 'master'

s390x: smp, vm lib updates; I/O and smp tests

See merge request kvm-unit-tests/kvm-unit-tests!29

s390x: Add tests for STCRW

The test consists of two parts: First a simple check to ensure we
enforce an aligned address. We test misalignment by 1 and 2 bytes.

The second part tests the handling of

s390x: Add tests for STCRW

The test consists of two parts: First a simple check to ensure we
enforce an aligned address. We test misalignment by 1 and 2 bytes.

The second part tests the handling of pending Channel Reports (CR). We
first assume no CR is initally pending and check STCRW returns
accordingly. Then, we generate a CR by resetting a Channel Path using
RCHP and make sure this results in exactly one CRW being generated which
has a Reporting-Source Code (RSC) corresponding to the Channel Path
facility.

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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Use report_fail(...) instead of report(0/false, ...)

Whitespace is kept consistent with the rest of the file.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Thomas Huth <

Use report_fail(...) instead of report(0/false, ...)

Whitespace is kept consistent with the rest of the file.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20211005090921.1816373-5-scgl@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

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s390x: css: testing measurement block format 1

Measurement block format 1 is made available by the extended
measurement block facility and is indicated in the SCHIB by
the bit in the PMCW.

The MBO

s390x: css: testing measurement block format 1

Measurement block format 1 is made available by the extended
measurement block facility and is indicated in the SCHIB by
the bit in the PMCW.

The MBO is specified in the SCHIB of each channel and the MBO
defined by the SCHM instruction is ignored.

The test of the MB format 1 is just skipped if the feature is
not available.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/kvm/1615545714-13747-7-git-send-email-pmorel@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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s390x: css: extending the subchannel modifying functions

To enable or disable measurement we will need specific
modifications on the subchannel.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
R

s390x: css: extending the subchannel modifying functions

To enable or disable measurement we will need specific
modifications on the subchannel.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/kvm/1615545714-13747-4-git-send-email-pmorel@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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s390x: css: simplifications of the tests

In order to ease the writing of tests based on:
- interrupt
- enabling a subchannel
- using multiple I/O on a channel without disabling it

We do the followi

s390x: css: simplifications of the tests

In order to ease the writing of tests based on:
- interrupt
- enabling a subchannel
- using multiple I/O on a channel without disabling it

We do the following simplifications:
- the I/O interrupt handler is registered on CSS initialization
- We do not enable again a subchannel in senseid if it is already
enabled
- we add a css_enabled() function to test if a subchannel is enabled

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/kvm/1615545714-13747-3-git-send-email-pmorel@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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s390x: css: Store CSS Characteristics

CSS characteristics exposes the features of the Channel SubSystem.
Let's use Store Channel Subsystem Characteristics to retrieve
the features of the CSS.

Signe

s390x: css: Store CSS Characteristics

CSS characteristics exposes the features of the Channel SubSystem.
Let's use Store Channel Subsystem Characteristics to retrieve
the features of the CSS.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/kvm/1615545714-13747-2-git-send-email-pmorel@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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Merge branch 's390x-pull-2021-08-03' of https://gitlab.com/frankja/kvm-unit-tests.git into 'master'

* IO tests PV compatibility (Pierre)
* Backtrace support (Janosch)
* mvpg test (Claudio)
* Fixups

Merge branch 's390x-pull-2021-08-03' of https://gitlab.com/frankja/kvm-unit-tests.git into 'master'

* IO tests PV compatibility (Pierre)
* Backtrace support (Janosch)
* mvpg test (Claudio)
* Fixups (Thomas)

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s390x: css: pv: css test adaptation for PV

We want the tests to automatically work with or without protected
virtualisation.
To do this we need to share the I/O memory with the host.

Let's replace

s390x: css: pv: css test adaptation for PV

We want the tests to automatically work with or without protected
virtualisation.
To do this we need to share the I/O memory with the host.

Let's replace all static allocations with dynamic allocations
to clearly separate shared and private memory.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Janosch Frank <frankja@de.ibm.com>
Message-Id: <1611322060-1972-4-git-send-email-pmorel@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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Merge tag 's390x-2021-20-01' of https://gitlab.com/frankja/kvm-unit-tests into HEAD

* Moved to SPDX license identifiers and cleaning up license
* Added test_bit(_inv)() & SCLP feature bit checking
*

Merge tag 's390x-2021-20-01' of https://gitlab.com/frankja/kvm-unit-tests into HEAD

* Moved to SPDX license identifiers and cleaning up license
* Added test_bit(_inv)() & SCLP feature bit checking
* Added first SIE lib and test for nesting tests
* Added diag318 emulation test
* Small UV fix

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s390x: lib: Move to GPL 2 and SPDX license identifiers

In the past we had some issues when developers wanted to use code
snippets or constants from the kernel in a test or in the library. To
remedy

s390x: lib: Move to GPL 2 and SPDX license identifiers

In the past we had some issues when developers wanted to use code
snippets or constants from the kernel in a test or in the library. To
remedy that the s390x maintainers decided to move all files to GPL 2
(if possible).

At the same time let's move to SPDX identifiers as they are much nicer
to read.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Pierre Morel <pmorel@linux.ibm.com>

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Merge tag 's390x-2020-31-07' of https://github.com/frankjaa/kvm-unit-tests into HEAD

* IO tests from Pierre
* GCC 10 compile fix from Claudio
* CPU model test fix from Thomas

Merge tag 's390x-2020-31-07' of https://github.com/frankjaa/kvm-unit-tests

* IO tests from Pierre
* GCC 10 compile fix from Claudio
* CPU model test fix from Thomas

s390x: css: ssch/tsch with sense and interrupt

After a channel is enabled we start a SENSE_ID command using
the SSCH instruction to recognize the control unit and device.

This tests the success of

s390x: css: ssch/tsch with sense and interrupt

After a channel is enabled we start a SENSE_ID command using
the SSCH instruction to recognize the control unit and device.

This tests the success of SSCH, the I/O interruption and the TSCH
instructions.

The SENSE_ID command response is tested to report 0xff inside
its reserved field and to report the same control unit type
as the cu_type kernel argument.

Without the cu_type kernel argument, the test expects a device
with a default control unit type of 0x3832, a.k.a virtio-net-ccw.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1594904645-32499-1-git-send-email-pmorel@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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s390x: css: msch, enable test

A second step when testing the channel subsystem is to prepare a channel
for use.
This includes:
- Get the current subchannel Information Block (SCHIB) using STSCH
- Up

s390x: css: msch, enable test

A second step when testing the channel subsystem is to prepare a channel
for use.
This includes:
- Get the current subchannel Information Block (SCHIB) using STSCH
- Update it in memory to set the ENABLE bit and the specified ISC
- Tell the CSS that the SCHIB has been modified using MSCH
- Get the SCHIB from the CSS again to verify that the subchannel is
enabled and uses the specified ISC.
- If the command succeeds but subchannel is not enabled or the ISC
field is not as expected, retry a predefined retries count.
- If the command fails, report the failure and do not retry, even
if cc indicates a busy/status pending as we do not expect this.

This tests the MSCH instruction to enable a channel successfully.
Retries are done and in case of error, and if the retries count
is exceeded, a report is made.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1594887809-10521-9-git-send-email-pmorel@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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s390x: css: stsch, enumeration test

First step for testing the channel subsystem is to enumerate the css and
retrieve the css devices.

We currently don't enable multiple subchannel sets and therefo

s390x: css: stsch, enumeration test

First step for testing the channel subsystem is to enumerate the css and
retrieve the css devices.

We currently don't enable multiple subchannel sets and therefore only
look in subchannel set 0

This tests the success of STSCH I/O instruction, we do not test the
reaction of the VM for an instruction with wrong parameters.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1594904550-32273-2-git-send-email-pmorel@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

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