[kvm-unit-tests PATCH v6 00/14] arm64: EL2 support

[Andrew Jones]

On Fri, Jan 23, 2026 at 04:50:39PM +0000, Joey Gouly wrote:
> Hi all,
> 
> This series is for adding support to running the kvm-unit-tests at EL2.
> 
> Changes since v5[1]:
> 	- make debug bp/wp skip on EL2
> 	- fix microbench test
> 	- add to CI
> 	- applied the fixup's Drew talked about in v5
> 
> About this failure in micro-bench:
> 
> 	- micro-bench hits the assert in gicv3_lpi_alloc_tables()
> 		lib/arm/gic-v3.c:183: assert failed: gicv3_data.redist_base[cpu]: Redistributor for cpu0 not initialized. Did cpu0 enable the GIC?	
> 
> in micro-bench.c lpi_prep() looks like this:
> 
> 	static bool lpi_prep(void)
> 	{
> 	        struct its_collection *col1;
> 	        struct its_device *dev2;
> 	        if (!gicv3_its_base())
> 	                return false;
> 
> QEMU by default runs with gic-v2, so gicv3_its_base() should have returned
> false and the lpi tests skipped. However because of the overflow mentioned in
> the first commit (new to v6), the its_data.base was being overwritten to a
> non-zero value.  This meant the test tried to do gic-v3 things on a gic-v2.

Nice work on the micro-bench/gic issue. Unfortunately the timer test still
times out, and that breaks the new CI since that test is listed.

# No EL2

$ ./run_tests.sh -g timer
PASS timer (18 tests)

# EL2

$ EL2=y ./run_tests.sh -g timer
FAIL timer (timeout; duration=10s)

$ TIMEOUT=90s EL2=y ./run_tests.sh -g timer
FAIL timer (timeout; duration=90s)

$ cat logs/timer.log
timeout -k 1s --foreground 90s /usr/bin/qemu-system-aarch64 -nodefaults -machine virt,virtualization=on -accel tcg -cpu max -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd -device pci-testdev -display none -serial stdio -kernel arm/timer.flat -smp 1 # -initrd /tmp/tmp.N15fhaPbhB
CNTFRQ_EL0   : 0x0000000003b9aca0
CNTPCT_EL0   : 0x00000000001d3a1f
CNTP_CTL_EL0 : 0x0000000000000000
CNTP_CVAL_EL0: 0x0000000000000000
CNTVCT_EL0   : 0x00000000001d5884
CNTV_CTL_EL0 : 0x0000000000000000
CNTV_CVAL_EL0: 0x0000000000000000
INFO: vtimer-busy-loop: After timer: 0x000000000027ae86
INFO: vtimer-busy-loop: Expected   : 0x000000000027415b
INFO: vtimer-busy-loop: Difference : 450 us
PASS: vtimer-busy-loop: latency within 10 ms
FAIL: vtimer-busy-loop: interrupt received
PASS: vtimer-busy-loop: not pending before
FAIL: vtimer-busy-loop: interrupt signal pending
PASS: vtimer-busy-loop: no interrupt when timer is disabled
PASS: vtimer-busy-loop: interrupt signal no longer pending
PASS: vtimer-busy-loop: interrupt signal not pending
INFO: vtimer-busy-loop: waiting for interrupt...
qemu-system-aarch64: terminating on signal 15 from pid 112137 (timeout)


Thanks,
drew