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Sampat" Cc: kvm@vger.kernel.org, shuah@kernel.org, thomas.lendacky@amd.com, michael.roth@amd.com, pbonzini@redhat.com, pgonda@google.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Wed, Jul 10, 2024, Pratik R. Sampat wrote: > Introduce testing of SNP ioctl calls. This patch includes both positive > and negative tests of various parameters such as flags, page types and > policies. > > Signed-off-by: Pratik R. Sampat > --- > .../selftests/kvm/x86_64/sev_smoke_test.c | 119 +++++++++++++++++- > 1 file changed, 118 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c > index 500c67b3793b..1d5c275c11b3 100644 > --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c > +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c > @@ -186,13 +186,130 @@ static void test_sev_launch(void *guest_code, uint32_t type, uint64_t policy) > kvm_vm_free(vm); > } > > +static int spawn_snp_launch_start(uint32_t type, uint64_t policy, uint8_t flags) > +{ > + struct kvm_vcpu *vcpu; > + struct kvm_vm *vm; > + int ret; > + > + vm = vm_sev_create_with_one_vcpu(type, NULL, &vcpu); Is a vCPU actually necessary/interesting? > + ret = snp_vm_launch(vm, policy, flags); > + kvm_vm_free(vm); > + > + return ret; > +} > + > +static void test_snp_launch_start(uint32_t type, uint64_t policy) > +{ > + uint8_t i; > + int ret; > + > + ret = spawn_snp_launch_start(type, policy, 0); s/spawn/__test, because "spawn" implies there's something living after this. > + TEST_ASSERT(!ret, > + "KVM_SEV_SNP_LAUNCH_START should not fail, invalid flag."); This should go away once vm_sev_ioctl() handles the assertion, but this assert message is bad (there's no invalid flag). > + > + for (i = 1; i < 8; i++) { > + ret = spawn_snp_launch_start(type, policy, BIT(i)); > + TEST_ASSERT(ret && errno == EINVAL, > + "KVM_SEV_SNP_LAUNCH_START should fail, invalid flag."); Print the flag, type, and policy. In general, please think about what information would be helpful if this fails.