Add selftests coverage for KVM_RUN_NEEDS_COMPLETION by redoing KVM_RUN if
and only if KVM states that completion is required.
Opportunistically rename the helper to replace "io" with "exit", as exits
that require completion are no longer limited to I/O.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
tools/testing/selftests/kvm/include/kvm_util.h | 8 ++++++--
tools/testing/selftests/kvm/lib/kvm_util.c | 4 ++++
tools/testing/selftests/kvm/lib/ucall_common.c | 2 +-
tools/testing/selftests/kvm/lib/x86/processor.c | 8 +-------
tools/testing/selftests/kvm/x86/triple_fault_event_test.c | 3 +--
5 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 78fd597c1b60..86e1850e4e49 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -29,6 +29,8 @@
#define NSEC_PER_SEC 1000000000L
+extern bool kvm_has_needs_completion;
+
struct userspace_mem_region {
struct kvm_userspace_memory_region2 region;
struct sparsebit *unused_phy_pages;
@@ -634,9 +636,11 @@ static inline int __vcpu_run(struct kvm_vcpu *vcpu)
void vcpu_run_immediate_exit(struct kvm_vcpu *vcpu);
-static inline void vcpu_run_complete_io(struct kvm_vcpu *vcpu)
+static inline void vcpu_run_complete_exit(struct kvm_vcpu *vcpu)
{
- vcpu_run_immediate_exit(vcpu);
+ if (!kvm_has_needs_completion ||
+ (vcpu->run->flags & KVM_RUN_NEEDS_COMPLETION))
+ vcpu_run_immediate_exit(vcpu);
}
struct kvm_reg_list *vcpu_get_reg_list(struct kvm_vcpu *vcpu);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index c9a33766f673..95ac9b981049 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -19,6 +19,8 @@
#define KVM_UTIL_MIN_PFN 2
+bool kvm_has_needs_completion;
+
uint32_t guest_random_seed;
struct guest_random_state guest_rng;
static uint32_t last_guest_seed;
@@ -2253,6 +2255,8 @@ void __attribute((constructor)) kvm_selftest_init(void)
/* Tell stdout not to buffer its content. */
setbuf(stdout, NULL);
+ kvm_has_needs_completion = kvm_check_cap(KVM_CAP_NEEDS_COMPLETION);
+
guest_random_seed = last_guest_seed = random();
pr_info("Random seed: 0x%x\n", guest_random_seed);
diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
index 42151e571953..125584a94ba8 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -154,7 +154,7 @@ uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
"Guest failed to allocate ucall struct");
memcpy(uc, addr, sizeof(*uc));
- vcpu_run_complete_io(vcpu);
+ vcpu_run_complete_exit(vcpu);
} else {
memset(uc, 0, sizeof(*uc));
}
diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c
index bd5a802fa7a5..1db4764e413b 100644
--- a/tools/testing/selftests/kvm/lib/x86/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86/processor.c
@@ -1077,13 +1077,7 @@ struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu)
nested_size, sizeof(state->nested_));
}
- /*
- * When KVM exits to userspace with KVM_EXIT_IO, KVM guarantees
- * guest state is consistent only after userspace re-enters the
- * kernel with KVM_RUN. Complete IO prior to migrating state
- * to a new VM.
- */
- vcpu_run_complete_io(vcpu);
+ vcpu_run_complete_exit(vcpu);
state = malloc(sizeof(*state) + msr_list->nmsrs * sizeof(state->msrs.entries[0]));
TEST_ASSERT(state, "-ENOMEM when allocating kvm state");
diff --git a/tools/testing/selftests/kvm/x86/triple_fault_event_test.c b/tools/testing/selftests/kvm/x86/triple_fault_event_test.c
index 56306a19144a..82d732788bc1 100644
--- a/tools/testing/selftests/kvm/x86/triple_fault_event_test.c
+++ b/tools/testing/selftests/kvm/x86/triple_fault_event_test.c
@@ -97,8 +97,7 @@ int main(void)
events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT;
events.triple_fault.pending = true;
vcpu_events_set(vcpu, &events);
- run->immediate_exit = true;
- vcpu_run_complete_io(vcpu);
+ vcpu_run_complete_exit(vcpu);
vcpu_events_get(vcpu, &events);
TEST_ASSERT(events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT,
--
2.47.1.613.gc27f4b7a9f-goog
