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Sampat" , Reinette Chatre Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Yan Zhao From: Yan Zhao Add a selftest to verify that adding flag KVM_MEM_LOG_DIRTY_PAGES to a !KVM_MEM_GUEST_MEMFD memslot does not produce host errors in TDX. Signed-off-by: Yan Zhao Signed-off-by: Sagi Shahar --- tools/testing/selftests/kvm/x86/tdx_vm_test.c | 45 ++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86/tdx_vm_test.c b/tools/testing/selftests/kvm/x86/tdx_vm_test.c index 82acc17a66ab..410d814dd39a 100644 --- a/tools/testing/selftests/kvm/x86/tdx_vm_test.c +++ b/tools/testing/selftests/kvm/x86/tdx_vm_test.c @@ -1167,6 +1167,47 @@ void verify_tdcall_vp_info(void) printf("\t ... PASSED\n"); } +#define TDX_LOG_DIRTY_PAGES_FLAG_TEST_GPA (0xc0000000) +#define TDX_LOG_DIRTY_PAGES_FLAG_TEST_GVA_SHARED (0x90000000) +#define TDX_LOG_DIRTY_PAGES_FLAG_REGION_SLOT 10 +#define TDX_LOG_DIRTY_PAGES_FLAG_REGION_NR_PAGES (0x1000 / getpagesize()) + +void guest_code_log_dirty_flag(void) +{ + memset((void *)TDX_LOG_DIRTY_PAGES_FLAG_TEST_GVA_SHARED, 1, 8); + tdx_test_success(); +} + +/* + * Verify adding flag KVM_MEM_LOG_DIRTY_PAGES to a !KVM_MEM_GUEST_MEMFD memslot + * in a TD does not produce host errors. + */ +void verify_log_dirty_pages_flag_on_non_gmemfd_slot(void) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_code_log_dirty_flag); + + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, + TDX_LOG_DIRTY_PAGES_FLAG_TEST_GPA, + TDX_LOG_DIRTY_PAGES_FLAG_REGION_SLOT, + TDX_LOG_DIRTY_PAGES_FLAG_REGION_NR_PAGES, + KVM_MEM_LOG_DIRTY_PAGES); + virt_map_shared(vm, TDX_LOG_DIRTY_PAGES_FLAG_TEST_GVA_SHARED, + (uint64_t)TDX_LOG_DIRTY_PAGES_FLAG_TEST_GPA, + TDX_LOG_DIRTY_PAGES_FLAG_REGION_NR_PAGES); + td_finalize(vm); + + printf("Verifying Log dirty flag:\n"); + vcpu_run(vcpu); + tdx_test_assert_success(vcpu); + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { ksft_print_header(); @@ -1174,7 +1215,7 @@ 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(15); + ksft_set_plan(16); ksft_test_result(!run_in_new_process(&verify_td_lifecycle), "verify_td_lifecycle\n"); ksft_test_result(!run_in_new_process(&verify_report_fatal_error), @@ -1205,6 +1246,8 @@ int main(int argc, char **argv) "verify_host_reading_private_mem\n"); ksft_test_result(!run_in_new_process(&verify_tdcall_vp_info), "verify_tdcall_vp_info\n"); + ksft_test_result(!run_in_new_process(&verify_log_dirty_pages_flag_on_non_gmemfd_slot), + "verify_log_dirty_pages_flag_on_non_gmemfd_slot\n"); ksft_finished(); return 0;