linux.git/tools/testing/selftests/kvm/lib/test_util.c, branch v5.8

KVM: selftests: Rework timespec functions and usage

2020-03-18T13:08:56+00:00

The steal_time test's timespec stop condition was wrong and should have
used the timespec functions instead to avoid being wrong, but
timespec_diff had a strange interface. Rework all the timespec API and
its use.

Signed-off-by: Andrew Jones 
Signed-off-by: Paolo Bonzini

KVM: selftests: Introduce steal-time test

2020-03-16T16:59:07+00:00

The steal-time test confirms what is reported to the guest as stolen
time is consistent with the run_delay reported for the VCPU thread
on the host. Both x86_64 and AArch64 have the concept of steal/stolen
time so this test is introduced for both architectures.

While adding the test we ensure .gitignore has all tests listed
(it was missing s390x/resets) and that the Makefile has all tests
listed in alphabetical order (not really necessary, but it almost
was already...). We also extend the common API with a new num-guest-
pages call and a new timespec call.

Signed-off-by: Andrew Jones 
Signed-off-by: Paolo Bonzini

KVM: selftests: Use consistent message for test skipping

2020-03-16T16:59:05+00:00

Signed-off-by: Andrew Jones 
Signed-off-by: Paolo Bonzini

KVM: selftests: Time guest demand paging

2020-03-16T16:57:05+00:00

In order to quantify demand paging performance, time guest execution
during demand paging.

Signed-off-by: Ben Gardon 
[Move timespec-diff to test_util.h]
Signed-off-by: Andrew Jones 
Signed-off-by: Paolo Bonzini

KVM: selftests: Add memory size parameter to the demand paging test

2020-03-16T16:57:02+00:00

Add an argument to allow the demand paging test to work on larger and
smaller guest sizes.

Signed-off-by: Ben Gardon 
[Rewrote parse_size() to simplify and provide user more flexibility as
 to how sizes are input. Also fixed size overflow assert.]
Signed-off-by: Andrew Jones 
Signed-off-by: Paolo Bonzini