linux-toradex.git/tools/testing/selftests/kvm/lib/aarch64, branch master

KVM: selftests: Use canonical $(ARCH) paths for KVM selftests directories

2024-12-18T22:15:04+00:00

Use the kernel's canonical $(ARCH) paths instead of the raw target triple
for KVM selftests directories.  KVM selftests are quite nearly the only
place in the entire kernel that using the target triple for directories,
tools/testing/selftests/drivers/s390x being the lone holdout.

Using the kernel's preferred nomenclature eliminates the minor, but
annoying, friction of having to translate to KVM's selftests directories,
e.g. for pattern matching, opening files, running selftests, etc.

Opportunsitically delete file comments that reference the full path of the
file, as they are obviously prone to becoming stale, and serve no known
purpose.

Reviewed-by: Muhammad Usama Anjum 
Acked-by: Claudio Imbrenda 
Acked-by: Andrew Jones 
Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: Return a value from vcpu_get_reg() instead of using an out-param

2024-12-18T22:14:14+00:00

Return a uint64_t from vcpu_get_reg() instead of having the caller provide
a pointer to storage, as none of the vcpu_get_reg() usage in KVM selftests
accesses a register larger than 64 bits, and vcpu_set_reg() only accepts a
64-bit value.  If a use case comes along that needs to get a register that
is larger than 64 bits, then a utility can be added to assert success and
take a void pointer, but until then, forcing an out param yields ugly code
and prevents feeding the output of vcpu_get_reg() into vcpu_set_reg().

Reviewed-by: Andrew Jones 
Acked-by: Claudio Imbrenda 
Link: https://lore.kernel.org/r/20241128005547.4077116-3-seanjc@google.com
Signed-off-by: Sean Christopherson

KVM: arm64: selftests: Convert to kernel's ESR terminology

2024-10-26T14:37:49+00:00

Drop the KVM selftests specific flavoring of ESR in favor of the kernel
header.

Reviewed-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20241025203106.3529261-4-oliver.upton@linux.dev
Signed-off-by: Oliver Upton

KVM: arm64: selftests: Ensure pending interrupts are handled in arch_timer test

2024-08-30T08:03:45+00:00

Break up the asm instructions poking daifclr and daifset to handle
interrupts. R_RBZYL specifies pending interrupts will be handle after
context synchronization events such as an ISB.

Introduce a function wrapper for the WFI instruction.

Signed-off-by: Colton Lewis 
Link: https://lore.kernel.org/r/20240823175836.2798235-2-coltonlewis@google.com
Signed-off-by: Marc Zyngier

Merge tag 'kvm-x86-selftests_utils-6.10' of https://github.com/kvm-x86/linux into HEAD

2024-05-12T07:18:11+00:00

KVM selftests treewide updates for 6.10:

 - Define _GNU_SOURCE for all selftests to fix a warning that was introduced by
   a change to kselftest_harness.h late in the 6.9 cycle, and because forcing
   every test to #define _GNU_SOURCE is painful.

 - Provide a global psuedo-RNG instance for all tests, so that library code can
   generate random, but determinstic numbers.

 - Use the global pRNG to randomly force emulation of select writes from guest
   code on x86, e.g. to help validate KVM's emulation of locked accesses.

 - Rename kvm_util_base.h back to kvm_util.h, as the weird layer of indirection
   was added purely to avoid manually #including ucall_common.h in a handful of
   locations.

 - Allocate and initialize x86's GDT, IDT, TSS, segments, and default exception
   handlers at VM creation, instead of forcing tests to manually trigger the
   related setup.

Revert "kvm: selftests: move base kvm_util.h declarations to kvm_util_base.h"

2024-04-29T19:54:13+00:00

Effectively revert the movement of code from kvm_util.h => kvm_util_base.h,
as the TL;DR of the justification for the move was to avoid #idefs and/or
circular dependencies between what ended up being ucall_common.h and what
was (and now again, is), kvm_util.h.

But avoiding #ifdef and circular includes is trivial: don't do that.  The
cost of removing kvm_util_base.h is a few extra includes of ucall_common.h,
but that cost is practically nothing.  On the other hand, having a "base"
version of a header that is really just the header itself is confusing,
and makes it weird/hard to choose names for headers that actually are
"base" headers, e.g. to hold core KVM selftests typedefs.

For all intents and purposes, this reverts commit
7d9a662ed9f0403e7b94940dceb81552b8edb931.

Reviewed-by: Ackerley Tng 
Link: https://lore.kernel.org/r/20240314232637.2538648-2-seanjc@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: Add helper for enabling LPIs on a redistributor

2024-04-25T12:19:56+00:00

The selftests GIC library presently does not support LPIs. Add a
userspace helper for configuring a redistributor for LPIs, installing
an LPI configuration table and LPI pending table.

Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-18-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier

KVM: selftests: Add a minimal library for interacting with an ITS

2024-04-25T12:19:56+00:00

A prerequisite of testing LPI injection performance is of course
instantiating an ITS for the guest. Add a small library for creating an
ITS and interacting with it from the guest.

Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-17-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier

KVM: selftests: Standardise layout of GIC frames

2024-04-25T12:19:56+00:00

It would appear that all of the selftests are using the same exact
layout for the GIC frames. Fold this back into the library
implementation to avoid defining magic values all over the selftests.

This is an extension of Colton's change, ripping out parameterization of
from the library internals in addition to the public interfaces.

Co-developed-by: Colton Lewis 
Signed-off-by: Colton Lewis 
Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-15-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier

KVM: selftests: Align with kernel's GIC definitions

2024-04-25T12:19:56+00:00

There are a few subtle incongruencies between the GIC definitions used
by the kernel and selftests. Furthermore, the selftests header blends
implementation detail (e.g. default priority) with the architectural
definitions.

This is all rather annoying, since bulk imports of the kernel header
is not possible. Move selftests-specific definitions out of the
offending header and realign tests on the canonical definitions for
things like sysregs. Finally, haul in a fresh copy of the gicv3 header
to enable a forthcoming ITS selftest.

Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-14-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier