Assert that the SMC64 view of the Arm architecture range is reserved by
KVM and cannot be filtered by userspace.
Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx>
---
tools/testing/selftests/kvm/aarch64/smccc_filter.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/tools/testing/selftests/kvm/aarch64/smccc_filter.c b/tools/testing/selftests/kvm/aarch64/smccc_filter.c
index 0f9db0641847..dab671fdf239 100644
--- a/tools/testing/selftests/kvm/aarch64/smccc_filter.c
+++ b/tools/testing/selftests/kvm/aarch64/smccc_filter.c
@@ -99,6 +99,7 @@ static void test_filter_reserved_range(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm = setup_vm(&vcpu);
+ uint32_t smc64_fn;
int r;
r = __set_smccc_filter(vm, ARM_SMCCC_ARCH_WORKAROUND_1,
@@ -106,6 +107,13 @@ static void test_filter_reserved_range(void)
TEST_ASSERT(r < 0 && errno == EEXIST,
"Attempt to filter reserved range should return EEXIST");
+ smc64_fn = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64,
+ 0, 0);
+
+ r = __set_smccc_filter(vm, smc64_fn, 1, KVM_SMCCC_FILTER_DENY);
+ TEST_ASSERT(r < 0 && errno == EEXIST,
+ "Attempt to filter reserved range should return EEXIST");
+
kvm_vm_free(vm);
}
--
2.40.0.577.gac1e443424-goog
