On Mon, 02 Jun 2025 07:04:07 +0100,
Itaru Kitayama [off-list ref] wrote:

On Mon, May 12, 2025 at 03:52:50AM -0700, Ganapatrao Kulkarni wrote:

quoted

Adding code to run guest_code in vEL2.
NV is enabled using command line argument and it is disabled by default.

NV is only enabled on ARM64, for other architectures the test will exit
with an ASSERT, if tried to run with NV enabled.

I'm seeing this in QEMU TCG mode, does this mean the limitation of the
emulation?

$ sudo /mnt/projects/linux/tools/testing/selftests/kvm/arm64/page_fault_test -m 3 -s anonymous
Random seed: 0x6b8b4567
==== Test Assertion Failure ====
  arm64/page_fault_test.c:632: test->expected_events.uffd_faults == events.uffd_faults
  pid=769 tid=769 errno=9 - Bad file descriptor
     1	0x000000000040325b: check_event_counts at page_fault_test.c:632
     2	 (inlined by) run_test at page_fault_test.c:739
     3	0x0000000000403cbf: for_each_guest_mode at guest_modes.c:96
     4	0x0000000000401cfb: for_each_test_and_guest_mode at page_fault_test.c:1107
     5	 (inlined by) main at page_fault_test.c:1133
     6	0x0000ffff848122db: ?? ??:0
     7	0x0000ffff848123bb: ?? ??:0
     8	0x0000000000401def: _start at ??:?
  0x2 != 0x1 (test->expected_events.uffd_faults != events.uffd_faults)

Unlikely. This could be a bug in the test, in KVM, or most likely
both.  You will have to investigate, I'm afraid.

	M.

-- 
Jazz isn't dead. It just smells funny.