Merge branch 'pr-2025-01-31' into 'master'

s390x: new edat, diag258 and STFLE tests; fixes for genprotimg >= 2.36.0; cleanups for snippets and makefiles

See merge request kvm-unit-tests/kvm-unit-te

Merge branch 'pr-2025-01-31' into 'master'

s390x: new edat, diag258 and STFLE tests; fixes for genprotimg >= 2.36.0; cleanups for snippets and makefiles

See merge request kvm-unit-tests/kvm-unit-tests!73

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s390x: Add sie_is_pv

Add a function to check if a guest VM is currently running protected.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>

s390x: Add sie_is_pv

Add a function to check if a guest VM is currently running protected.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Link: https://lore.kernel.org/r/20241016180320.686132-3-nsg@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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s390x: lib: Remove double include

libcflat.h was included twice.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Nina Schoet

s390x: lib: Remove double include

libcflat.h was included twice.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Link: https://lore.kernel.org/r/20241016180320.686132-2-nsg@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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Merge branch 'pr-2023-11-09' into 'master'

s390x: multiline unittests.cfg, sclp enhancements, topology fixes and improvements, sie without MSO/MSL, 2G guest alignment, bug fixes

See merge request k

Merge branch 'pr-2023-11-09' into 'master'

s390x: multiline unittests.cfg, sclp enhancements, topology fixes and improvements, sie without MSO/MSL, 2G guest alignment, bug fixes

See merge request kvm-unit-tests/kvm-unit-tests!48

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s390x: lib: sie: don't reenter SIE on pgm int

At the moment, when a PGM int occurs while in SIE, we will just reenter
SIE after the interrupt handler was called.

This is because sie() has a loop wh

s390x: lib: sie: don't reenter SIE on pgm int

At the moment, when a PGM int occurs while in SIE, we will just reenter
SIE after the interrupt handler was called.

This is because sie() has a loop which checks icptcode and re-enters SIE
if it is zero.

However, this behaviour is quite undesirable for SIE tests, since it
doesn't give the host the chance to assert on the PGM int. Instead, we
will just re-enter SIE, on nullifing conditions even causing the
exception again.

In sie(), check whether a pgm int code is set in lowcore. If it has,
exit the loop so the test can react to the interrupt. Add a new function
read_pgm_int_code() to obtain the interrupt code.

Note that this introduces a slight oddity with sie and pgm int in
certain cases: If a PGM int occurs between a expect_pgm_int() and sie(),
we will now never enter SIE until the pgm_int_code is cleared by e.g.
clear_pgm_int().

Also add missing include of facility.h to mem.h.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20231106163738.1116942-6-nrb@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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s390x: sie: switch to home space mode before entering SIE

This is to prepare for running guests without MSO/MSL, which is
currently not possible.

We already have code in sie64a to setup a guest pri

s390x: sie: switch to home space mode before entering SIE

This is to prepare for running guests without MSO/MSL, which is
currently not possible.

We already have code in sie64a to setup a guest primary ASCE before
entering SIE, so we can in theory switch to the page tables which
translate gpa to hpa.

But the host is running in primary space mode already, so changing the
primary ASCE before entering SIE will also affect the host's code and
data.

To make this switch useful, the host should run in a different address
space mode. Hence, set up and change to home address space mode before
installing the guest ASCE.

The home space ASCE is just copied over from the primary space ASCE, so
no functional change is intended, also for tests that want to use
MSO/MSL. If a test intends to use a different primary space ASCE, it can
now just set the guest.asce in the save_area.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20231106163738.1116942-4-nrb@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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s390x: sie: ensure guests are aligned to 2GB

Until now, kvm-unit-tests has aligned guests to 1 MB in the host virtual
address space. Unfortunately, some s390x environments require guests to
be 2GB a

s390x: sie: ensure guests are aligned to 2GB

Until now, kvm-unit-tests has aligned guests to 1 MB in the host virtual
address space. Unfortunately, some s390x environments require guests to
be 2GB aligned in the host virtual address space, preventing
kvm-unit-tests which act as a hypervisor from running there.

We can't easily put guests at address 0, since we want to be able to run
with MSO/MSL without having to maintain separate page tables for the
guest physical memory. 2GB is also not a good choice, since the
alloc_pages allocator will place its metadata there when the host has
more than 2GB of memory. In addition, we also want a bit of space after
the end of the host physical memory to be able to catch accesses beyond
the end of physical memory.

The vmalloc allocator unfortunately allocates memory starting at the
highest virtual address which is not suitable for guest memory either
due to additional constraints of some environments.

The physical page allocator in memalign_pages() is also not a optimal
choice, since every test running SIE would then require at least 4GB+1MB
of physical memory.

This results in a few quite complex allocation requirements, hence add a
new function sie_guest_alloc() which allocates memory for a guest and
then establishes a properly aligned virtual space mapping.

Rework snippet test and sie tests to use the new sie_guest_alloc()
function.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20231106170849.1184162-3-nrb@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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Merge branch 's390x-2023-07' into 'master'

s390x: topology tests, SCLP fixes, UV host test improvements, PV test improvements and validity/IPL test and some small maintanence fixes

See merge reques

Merge branch 's390x-2023-07' into 'master'

s390x: topology tests, SCLP fixes, UV host test improvements, PV test improvements and validity/IPL test and some small maintanence fixes

See merge request kvm-unit-tests/kvm-unit-tests!45

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lib: s390x: sie: Fix sie_get_validity() no validity handling

Rather than asserting, we can return a value that's designated as a
programming only value to indicate that there has been no validity.

lib: s390x: sie: Fix sie_get_validity() no validity handling

Rather than asserting, we can return a value that's designated as a
programming only value to indicate that there has been no validity.

The SIE instruction will never write 0xffff as a validity code so
let's just use that constant.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Link: https://lore.kernel.org/r/20230619083329.22680-2-frankja@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>

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Merge branch 's390x-next-2023-02' into 'master'

s390x: storage key migration tests, snippets and linker cleanups

See merge request kvm-unit-tests/kvm-unit-tests!40

lib: s390x: sie: Set guest memory pointer

Seems like it was introduced but never set. It's nicer to have a
pointer than to cast the MSO of a VM.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

lib: s390x: sie: Set guest memory pointer

Seems like it was introduced but never set. It's nicer to have a
pointer than to cast the MSO of a VM.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20230112154548.163021-6-frankja@linux.ibm.com
Message-Id: <20230112154548.163021-6-frankja@linux.ibm.com>

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Merge branch 's390x-next-2022-10' into 'master'

* library fixes to allow multi-cpu PV guests

* additional tests and fixes for uv-host

* timing tests and library improvements

* misc fixes

lib: s390x: sie: Properly populate SCA

CPU0 is the only cpu that's being used but we should still mark it as
online and set the SDA in the SCA.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

lib: s390x: sie: Properly populate SCA

CPU0 is the only cpu that's being used but we should still mark it as
online and set the SDA in the SCA.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20221021063902.10878-7-frankja@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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lib: s390x: Use a new asce for each PV guest

Every PV guest needs its own ASCE so let's copy the topmost table
designated by CR1 to create a new ASCE for the PV guest. Before and
after SIE we now ne

lib: s390x: Use a new asce for each PV guest

Every PV guest needs its own ASCE so let's copy the topmost table
designated by CR1 to create a new ASCE for the PV guest. Before and
after SIE we now need to switch ASCEs to and from the PV guest / test
ASCE. The SIE assembly function does that automatically.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20221021063902.10878-5-frankja@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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lib: s390x: sie: Improve validity handling and make it vm specific

The current library doesn't support running multiple vms at once as it
stores the validity once and not per vm. Let's move the vali

lib: s390x: sie: Improve validity handling and make it vm specific

The current library doesn't support running multiple vms at once as it
stores the validity once and not per vm. Let's move the validity
handling into the vm and introduce a new function to retrieve the vir.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20221021063902.10878-4-frankja@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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Merge branch 's390x-next-20220117' from imbrenda into 'master'

s390x: 2022-01-17 update

See merge request https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/merge_requests/22

lib: s390: sie: Add PV guest register handling

Protected guests have their registers stored to / loaded from offset 0x380
of the sie control block. So we need to copy over the GRs to/from that
offse

lib: s390: sie: Add PV guest register handling

Protected guests have their registers stored to / loaded from offset 0x380
of the sie control block. So we need to copy over the GRs to/from that
offset for format 4 (PV) guests before and after we enter SIE.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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lib: s390x: sie: Add sca allocation and freeing

For protected guests we always need a ESCA so let's add functions to
create and destroy SCAs on demand. We don't have scheduling and I
don't expect mu

lib: s390x: sie: Add sca allocation and freeing

For protected guests we always need a ESCA so let's add functions to
create and destroy SCAs on demand. We don't have scheduling and I
don't expect multiple VCPU SIE in the next few months so SCA content
handling is not added.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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Merge branch 's390x-pull-2021-16-08' into 'master'

s390x-pull-2021-16-08

See merge request kvm-unit-tests/kvm-unit-tests!15

lib: s390x: sie: Move sie function into library

Time to deduplicate more code.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio

lib: s390x: sie: Move sie function into library

Time to deduplicate more code.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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s390x: lib: sie: Add struct vm (de)initialization functions

Before I start copying the same code over and over lets move this into
the library.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

s390x: lib: sie: Add struct vm (de)initialization functions

Before I start copying the same code over and over lets move this into
the library.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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s390x: sie: Add sie lib validity handling

Let's start off the SIE lib with validity handling code since that has
the least amount of dependencies to other files.

Signed-off-by: Janosch Frank <frank

s390x: sie: Add sie lib validity handling

Let's start off the SIE lib with validity handling code since that has
the least amount of dependencies to other files.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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