On Thu, Aug 07, 2025, Sagi Shahar wrote:
+void verify_host_reading_private_mem(void) +{
- uint64_t second_host_read;
- uint64_t first_host_read;
- struct kvm_vcpu *vcpu;
- vm_vaddr_t test_page;
- uint64_t *host_virt;
- struct kvm_vm *vm;
- vm = td_create();
- td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0);
- vcpu = td_vcpu_add(vm, 0, guest_host_read_priv_mem);
- test_page = vm_vaddr_alloc_page(vm);
- TEST_ASSERT(test_page < BIT_ULL(32),
"Test address should fit in 32 bits so it can be sent to the guest");- host_virt = addr_gva2hva(vm, test_page);
- TEST_ASSERT(host_virt,
"Guest address not found in guest memory regions\n");- tdx_test_host_read_private_mem_addr = test_page;
- sync_global_to_guest(vm, tdx_test_host_read_private_mem_addr);
- td_finalize(vm);
- printf("Verifying host's behavior when reading TD private memory:\n");
- tdx_run(vcpu);
- tdx_test_assert_io(vcpu, TDX_HOST_READ_PRIVATE_MEM_PORT_TEST,
4, PORT_WRITE);- printf("\t ... Guest's variable contains 0xABCD\n");
Don't use bare printf() for what is effectively debug info.
- /* Host reads guest's variable. */
- first_host_read = *host_virt;
- printf("\t ... Host's read attempt value: %lu\n", first_host_read);
- /* Guest updates variable and host rereads it. */
- tdx_run(vcpu);
- printf("\t ... Guest's variable updated to 0xFEDC\n");
- second_host_read = *host_virt;
- printf("\t ... Host's second read attempt value: %lu\n",
second_host_read);- TEST_ASSERT(first_host_read == second_host_read,
"Host did not read a fixed pattern\n");- printf("\t ... Fixed pattern was returned to the host\n");
- kvm_vm_free(vm);
- printf("\t ... PASSED\n");
+}
int main(int argc, char **argv) { ksft_print_header(); @@ -966,7 +1045,7 @@ int main(int argc, char **argv) if (!is_tdx_enabled()) ksft_exit_skip("TDX is not supported by the KVM. Exiting.\n");
- ksft_set_plan(13);
- ksft_set_plan(14); ksft_test_result(!run_in_new_process(&verify_td_lifecycle), "verify_td_lifecycle\n");
This _really_ feels like it wants to be a first mover for using fixtures and test suites: https://lore.kernel.org/all/ZjUwqEXPA5QVItyX@google.com
ksft_test_result(!run_in_new_process(&verify_report_fatal_error), @@ -993,6 +1072,8 @@ int main(int argc, char **argv) "verify_mmio_writes\n"); ksft_test_result(!run_in_new_process(&verify_td_cpuid_tdcall), "verify_td_cpuid_tdcall\n");
- ksft_test_result(!run_in_new_process(&verify_host_reading_private_mem),
"verify_host_reading_private_mem\n");ksft_finished(); return 0; -- 2.51.0.rc0.155.g4a0f42376b-goog