[PATCH 05/10] selftests: KVM: Add test cases for physical counter offsetting

[Oliver Upton <oupton@google.com>]

Add support for physical counter offsetting to counter_state_test.
Assert that guest reads of the physical counter are within the expected
bounds.

Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Oliver Upton <oupton@google.com>
---
 .../selftests/kvm/system_counter_state_test.c | 27 ++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/system_counter_state_test.c b/tools/testing/selftests/kvm/system_counter_state_test.c
index 059971f6cb87..f537eb7b928c 100644
--- a/tools/testing/selftests/kvm/system_counter_state_test.c
+++ b/tools/testing/selftests/kvm/system_counter_state_test.c
@@ -62,11 +62,34 @@ static struct system_counter_state_test test_cases[] = {
 			.cntvoff = -1
 		}
 	},
+	{
+		.counter = PHYSICAL,
+		.state = {
+			.flags = KVM_SYSTEM_COUNTER_STATE_PHYS_OFFSET,
+			.cntpoff = 0
+		}
+	},
+	{
+		.counter = PHYSICAL,
+		.state = {
+			.flags = KVM_SYSTEM_COUNTER_STATE_PHYS_OFFSET,
+			.cntpoff = 1000000
+		}
+	},
+	{
+		.counter = PHYSICAL,
+		.state = {
+			.flags = KVM_SYSTEM_COUNTER_STATE_PHYS_OFFSET,
+			.cntpoff = -1
+		}
+	},
 };
 
 static void pr_test(struct system_counter_state_test *test)
 {
-	pr_info("counter: %s, cntvoff: %lld\n", counter_name(test->counter), test->state.cntvoff);
+	pr_info("counter: %s, cntvoff: %lld, cntpoff: %lld\n",
+	       counter_name(test->counter), test->state.cntvoff,
+	       test->state.cntpoff);
 }
 
 static struct kvm_system_counter_state *
@@ -103,6 +126,8 @@ static uint64_t host_read_guest_counter(struct system_counter_state_test *test)
 
 	r = read_cntvct_ordered();
 	switch (test->counter) {
+	case PHYSICAL:
+		r -= test->state.cntpoff;
 	case VIRTUAL:
 		r -= test->state.cntvoff;
 		break;
-- 
2.32.0.rc1.229.g3e70b5a671-goog

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