linux-kernel - [PATCH v2 0/4] KVM: selftests: arm64: Improve diagnostics from set_id

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Message-Id: <20251114-kvm-arm64-set-id-regs-aarch64-v2-0-672f214f41bf@kernel.org>
Date: Fri, 14 Nov 2025 15:35:33 +0000
From: Mark Brown <broonie@...nel.org>
To: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
 Joey Gouly <joey.gouly@....com>, Suzuki K Poulose <suzuki.poulose@....com>, 
 Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
 kvm@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH v2 0/4] KVM: selftests: arm64: Improve diagnostics from
 set_id_regs

While debugging issues related to aarch64 only systems I ran into
speedbumps due to the lack of detail in the results reported when the
guest register read and reset value preservation tests were run, they
generated an immediately fatal assert without indicating which register
was being tested. Update these tests to report a result per register,
making it much easier to see what the problem being reported is.

A similar, though less severe, issue exists with the validation of the
individual bitfields in registers due to the use of immediately fatal
asserts. Update those asserts to be standard kselftest reports.

Finally we have a fix for spurious errors on some NV systems.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
Changes in v2:
- Add a fix for spurious failures with 64 bit only guests.
- Link to v1: https://patch.msgid.link/20251030-kvm-arm64-set-id-regs-aarch64-v1-0-96fe0d2b178e@kernel.org

---
Mark Brown (4):
      KVM: selftests: arm64: Report set_id_reg reads of test registers as tests
      KVM: selftests: arm64: Report register reset tests individually
      KVM: selftests: arm64: Make set_id_regs bitfield validatity checks non-fatal
      KVM: selftests: arm64: Skip all 32 bit IDs when set_id_regs is aarch64 only

 tools/testing/selftests/kvm/arm64/set_id_regs.c | 150 ++++++++++++++++++------
 1 file changed, 111 insertions(+), 39 deletions(-)
---
base-commit: 211ddde0823f1442e4ad052a2f30f050145ccada
change-id: 20251028-kvm-arm64-set-id-regs-aarch64-ebb77969401c

Best regards,
--  
Mark Brown <broonie@...nel.org>