diff options
| author | Josh Hilke <jrhilke@google.com> | 2026-06-26 14:35:19 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-07-07 11:24:43 -0700 |
| commit | c772591d279e3023501c719d517817cceea8e76e (patch) | |
| tree | bcb19783549c49c2945fd97a4b79800f16474b49 /tools/testing/selftests/kvm/lib | |
| parent | 5506feb24282db0a9db5b0e151093e6eb74dd101 (diff) | |
KVM: selftests: Add helper to generate random u64 in range [min,max]
Introduce kvm_random_u64_in_range(state, min, max). This function
returns a random u64 in the inclusive range of [min, max] using a struct
kvm_random_state.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Josh Hilke <jrhilke@google.com>
Link: https://patch.msgid.link/20260626213534.3866178-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/test_util.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index e98ca7ef439c..e208a57f190c 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -42,6 +42,24 @@ u32 kvm_random_u32(struct kvm_random_state *state) return state->seed; } +/* Returns a random u64 in the inclusive range [min, max] */ +u64 kvm_random_u64_in_range(struct kvm_random_state *state, u64 min, + u64 max) +{ + u64 value; + u64 range; + + TEST_ASSERT(min <= max, "PEBKAC, min = 0x%lx, max = 0x%lx", min, max); + + value = kvm_random_u64(state); + + range = max - min; + if (range == ULLONG_MAX) + return value; + + return min + (value % (range + 1)); +} + /* * Parses "[0-9]+[kmgt]?". */ |