kvm-unit-tests hang on Arm FVP with protected mode

[Naresh Kamboju]

kvm-unit-tests consistently hang on Arm FVP when booted with
kvm-arm.mode=protected across both 4K and 64K page-size kernel builds.

Running the same tests with kvm-arm.mode=vhe completes successfully.

Anders, bisected and identified the first bad commit as:

  066daa8d3bc2694c392e14091978043aed7b1f23
  KVM: arm64: Initialize HCRX_EL2 traps in pKVM

Regression Analysis:
- Reproducibility? yes

Test regression: kvm-unit-tests hang on Arm FVP with kvm-arm.mode=protected

Reported-by: Linux Kernel Functional Testing <lkft at linaro.org>

Environment:
Platform: Arm FVP base-revc
Kernel: arm64 (tested with 4K and 64K page sizes)
Mode: kvm-arm.mode=protected (hangs) vs kvm-arm.mode=vhe (passes)
Test suite: kvm-unit-tests (./run_tests.sh -a -t -v)
Cmdline args : kvm-arm.mode=protected
Kernel: Mainline master and Linux next master

Test run log:
INFO: running kvm unit tests ...
+ [ True = false ]
+ ./run_tests.sh -a -t -v
+ tee -a /lava-1/0/tests/0_kvm-unit-tests/automated/linux/kvm-unit-tests/output/result_log.txt
TAP version 13

Links:
https://regressions.linaro.org/lkft/linux-mainline-master/v6.17-rc4/lava/kvm-unit-tests/history/?page=1
https://qa-reports.linaro.org/api/testruns/29720932/log_file/

--
Linaro LKFT
https://lkft.linaro.org