The test checks report_fatal_error functionality.
Signed-off-by: Sagi Shahar sagis@google.com --- tools/testing/selftests/kvm/lib/x86_64/tdx.h | 17 ++++++ .../selftests/kvm/x86_64/tdx_vm_tests.c | 55 +++++++++++++++++++ 2 files changed, 72 insertions(+)
diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx.h b/tools/testing/selftests/kvm/lib/x86_64/tdx.h index d5de52657112..351ece3e80e2 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/tdx.h +++ b/tools/testing/selftests/kvm/lib/x86_64/tdx.h @@ -51,6 +51,7 @@ #define _PAGE_RW (1UL<<1) /* writeable */ #define _PAGE_PS (1UL<<7) /* page size bit*/
+#define TDX_REPORT_FATAL_ERROR 0x10003 #define TDX_INSTRUCTION_IO 30
#define TDX_SUCCESS_PORT 0x30 @@ -212,6 +213,22 @@ static inline void tdvmcall_success(void) tdvmcall_io(TDX_SUCCESS_PORT, /*size=*/4, TDX_IO_WRITE, &code); }
+/* + * Report an error to user space. + * data_gpa may point to an optional shared guest memory holding the error string. + * Return value from tdvmcall is ignored since execution is not expected to + * continue beyond this point. + */ +static inline void tdvmcall_fatal(uint64_t error_code) +{ + struct kvm_regs regs; + + memset(®s, 0, sizeof(regs)); + regs.r11 = TDX_REPORT_FATAL_ERROR; + regs.r12 = error_code; + regs.rcx = 0x1C00; + tdcall(®s); +}
#define TDX_FUNCTION_SIZE(name) ((uint64_t)&__stop_sec_ ## name -\ (uint64_t)&__start_sec_ ## name) \ 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 590e45aa7570..1db5400ca5ef 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -91,6 +91,60 @@ void verify_td_lifecycle(void) printf("\t ... PASSED\n"); }
+/* + * Verifies TDX_REPORT_FATAL_ERROR functionality. + */ +TDX_GUEST_FUNCTION(guest_code_report_fatal_error) +{ + uint64_t err; + /* Note: err should follow the GHCI spec definition: + * bits 31:0 should be set to 0. + * bits 62:32 are used for TD-specific extended error code. + * bit 63 is used to mark additional information in shared memory. + */ + err = 0x0BAAAAAD00000000; + + if (err) + tdvmcall_fatal(err); + + tdvmcall_success(); +} + +void verify_report_fatal_error(void) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + printf("Verifying report_fatal_error:\n"); + /* Create a TD VM with no memory.*/ + vm = vm_create_tdx(); + + /* Allocate TD guest memory and initialize the TD.*/ + initialize_td(vm); + + /* Initialize the TD vcpu and copy the test code to the guest memory.*/ + vcpu = vm_vcpu_add_tdx(vm, 0); + + /* Setup and initialize VM memory */ + prepare_source_image(vm, guest_code_report_fatal_error, + TDX_FUNCTION_SIZE(guest_code_report_fatal_error), + 0); + finalize_td_memory(vm); + + vcpu_run(vcpu); + ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT); + ASSERT_EQ(vcpu->run->system_event.ndata, 3); + ASSERT_EQ(vcpu->run->system_event.data[0], TDX_REPORT_FATAL_ERROR); + ASSERT_EQ(vcpu->run->system_event.data[1], 0x0BAAAAAD00000000); + ASSERT_EQ(vcpu->run->system_event.data[2], 0); + + vcpu_run(vcpu); + CHECK_GUEST_COMPLETION(vcpu); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { if (!is_tdx_enabled()) { @@ -99,6 +153,7 @@ int main(int argc, char **argv) }
run_in_new_process(&verify_td_lifecycle); + run_in_new_process(&verify_report_fatal_error);
return 0; }