On 12/13/2023 4:46 AM, Sagi Shahar wrote:
The test verifies IO reads of various sizes from the host to the guest.
Signed-off-by: Sagi Shahar sagis@google.com Signed-off-by: Ackerley Tng ackerleytng@google.com Signed-off-by: Ryan Afranji afranji@google.com
.../selftests/kvm/x86_64/tdx_vm_tests.c | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+)
Reviewed-by: Binbin Wu binbin.wu@linux.intel.com
diff --git a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c index a2b3e1aef151..699cba36e9ce 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -429,6 +429,92 @@ void verify_guest_writes(void) printf("\t ... PASSED\n"); } +#define TDX_IO_READS_TEST_PORT 0x52
+/*
- Verifies IO functionality by reading values of different sizes
- from the host.
- */
+void guest_io_reads(void) +{
- uint64_t data;
- uint64_t ret;
- ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 1,
TDG_VP_VMCALL_INSTRUCTION_IO_READ,&data);- if (ret)
tdx_test_fatal(ret);- if (data != 0xAB)
tdx_test_fatal(1);- ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 2,
TDG_VP_VMCALL_INSTRUCTION_IO_READ,&data);- if (ret)
tdx_test_fatal(ret);- if (data != 0xABCD)
tdx_test_fatal(2);- ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 4,
TDG_VP_VMCALL_INSTRUCTION_IO_READ,&data);- if (ret)
tdx_test_fatal(ret);- if (data != 0xFFABCDEF)
tdx_test_fatal(4);- // Read an invalid number of bytes.
- ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 5,
TDG_VP_VMCALL_INSTRUCTION_IO_READ,&data);- if (ret)
tdx_test_fatal(ret);- tdx_test_success();
+}
+void verify_guest_reads(void) +{
- struct kvm_vm *vm;
- struct kvm_vcpu *vcpu;
- vm = td_create();
- td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0);
- vcpu = td_vcpu_add(vm, 0, guest_io_reads);
- td_finalize(vm);
- printf("Verifying guest reads:\n");
- td_vcpu_run(vcpu);
- TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
- TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 1,
TDG_VP_VMCALL_INSTRUCTION_IO_READ);- *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xAB;
- td_vcpu_run(vcpu);
- TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
- TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 2,
TDG_VP_VMCALL_INSTRUCTION_IO_READ);- *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xABCD;
- td_vcpu_run(vcpu);
- TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
- TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 4,
TDG_VP_VMCALL_INSTRUCTION_IO_READ);- *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xFFABCDEF;
- td_vcpu_run(vcpu);
- TEST_ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT);
- TEST_ASSERT_EQ(vcpu->run->system_event.data[1], TDG_VP_VMCALL_INVALID_OPERAND);
- td_vcpu_run(vcpu);
- TDX_TEST_ASSERT_SUCCESS(vcpu);
- kvm_vm_free(vm);
- printf("\t ... PASSED\n");
+}
- int main(int argc, char **argv) { setbuf(stdout, NULL);
@@ -444,6 +530,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_td_cpuid); run_in_new_process(&verify_get_td_vmcall_info); run_in_new_process(&verify_guest_writes);
- run_in_new_process(&verify_guest_reads);
return 0; }