From patchwork Sat Jan 21 00:15:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ackerley Tng X-Patchwork-Id: 13110719 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9967EC27C76 for ; Sat, 21 Jan 2023 00:17:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229986AbjAUARw (ORCPT ); Fri, 20 Jan 2023 19:17:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229950AbjAUARe (ORCPT ); Fri, 20 Jan 2023 19:17:34 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13B2BCC5FD for ; Fri, 20 Jan 2023 16:17:11 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id i10-20020a25f20a000000b006ea4f43c0ddso7516396ybe.21 for ; Fri, 20 Jan 2023 16:17:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=EC2eVAKw5chE0JhJXlD1+MmiDErdw2lzMwJWsfEJffs=; b=X/BTnHPRI0KSxecnxIVHmWDH6w6f+DxWnjjSrMtMe2JlJrUKWmKU1ub1lVQuTb4GUy WqE6l0j/QytLan9Ix3EXZ9Gxbd9gZ0kkNwPysoMtmBq8n+lforCzB5DlEneN7VjDx43z Hfdk7kbMenghMMrSWfS1S1PHUwdSfv4fl8uCKKZ4eT4n5GNnzLri4jpCvbCJQKrfAgJz LscvoW9GDaRYlOFM2DU9J9XqYw6vCt0DytT2V6/0DC66CnDbhom9eLhsJnK7aMe2ayBa lGsYo07CWm6lLnw2AekdvE+dIO3AY3tqLqnG5HMTEgNZjA6X/rorMfltBuVCVyB9/iSj HtUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=EC2eVAKw5chE0JhJXlD1+MmiDErdw2lzMwJWsfEJffs=; b=psx1YS5k9viivwSGq5ZctRbGY68bjVZAv48Xlq5RH0U5eBC0iJfwUHT6GvUIegt2Hm KrPrqQyqOLWu4ZtHG8YATXDmkeSCZ8jnuyxf6kFMkdIsrJNw2TzzU2mjZLEw14HSc79A uHeGyjVbh5R5FW/x1SevCJcCdOmlImRXrBwkicOBLS4tuo/gPU/t9ygn3Y5IGda8TDlh j+G06lgC+Iv60akLSGhkhCHbREBpp6Hb4Kl+FUVZrS9XN7+XCDv/udW6k6obAkw+mQrF /aqIbgB340TaK2xYnN2fwKWBN5UzmUHiyZk9DLPQ/90iT/XkdMBfRuHaaGA6DudPK8b3 Evrg== X-Gm-Message-State: AFqh2koJYffeVFI6rF09B6ZsL3klBYWtHG5dTOlkCS5u/Ve2OvTsZb20 QtcUmGX8HF0ro6GXnJsqm2p+yOWpN18vGQ0h0NXwTCYx2Y4MBGL0TsIlfFBPsy1f2Q4oX8KZ8VC a2Uqle/GJJzZLLPDw1FkazfdMqyN+gKiHKhFzFcczjb5el+teP/f2WIxo/86vB0i3TbRoRuno2L FfwodHkE5RanE= X-Google-Smtp-Source: AMrXdXvECtv2OVE4yH2VV4gatly+5G5v4fXTnNgN4aEsp+twouX6j1MXGn/5UpxGAcY1UnIT25ptBjaye89JecjzIg== X-Received: from ackerleytng-cloudtop-sg.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:b30]) (user=ackerleytng job=sendgmr) by 2002:a81:1990:0:b0:3c7:edf8:6eb with SMTP id 138-20020a811990000000b003c7edf806ebmr1896073ywz.9.1674260219981; Fri, 20 Jan 2023 16:16:59 -0800 (PST) Date: Sat, 21 Jan 2023 00:15:22 +0000 In-Reply-To: <20230121001542.2472357-1-ackerleytng@google.com> Mime-Version: 1.0 References: <20230121001542.2472357-1-ackerleytng@google.com> X-Mailer: git-send-email 2.39.0.246.g2a6d74b583-goog Message-ID: <20230121001542.2472357-12-ackerleytng@google.com> Subject: [RFC PATCH v3 11/31] KVM: selftests: TDX: Adding test case for TDX port IO From: Ackerley Tng To: linux-kselftest@vger.kernel.org Cc: pbonzini@redhat.com, seanjc@google.com, isaku.yamahata@intel.com, sagis@google.com, erdemaktas@google.com, afranji@google.com, runanwang@google.com, shuah@kernel.org, drjones@redhat.com, maz@kernel.org, bgardon@google.com, jmattson@google.com, dmatlack@google.com, peterx@redhat.com, oupton@google.com, ricarkol@google.com, yang.zhong@intel.com, wei.w.wang@intel.com, xiaoyao.li@intel.com, pgonda@google.com, marcorr@google.com, eesposit@redhat.com, borntraeger@de.ibm.com, eric.auger@redhat.com, wangyanan55@huawei.com, aaronlewis@google.com, vkuznets@redhat.com, pshier@google.com, axelrasmussen@google.com, zhenzhong.duan@intel.com, maciej.szmigiero@oracle.com, like.xu@linux.intel.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Ackerley Tng Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Erdem Aktas Verifies TDVMCALL READ and WRITE operations. Signed-off-by: Erdem Aktas Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng --- .../kvm/include/x86_64/tdx/test_util.h | 34 ++++++++ .../selftests/kvm/x86_64/tdx_vm_tests.c | 82 +++++++++++++++++++ 2 files changed, 116 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h b/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h index 6d69921136bd2..95a5d5be7f0bf 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h @@ -9,6 +9,40 @@ #define TDX_TEST_SUCCESS_PORT 0x30 #define TDX_TEST_SUCCESS_SIZE 4 +/** + * Assert that some IO operation involving tdg_vp_vmcall_instruction_io() was + * called in the guest. + */ +#define TDX_TEST_ASSERT_IO(VCPU, PORT, SIZE, DIR) \ + do { \ + TEST_ASSERT((VCPU)->run->exit_reason == KVM_EXIT_IO, \ + "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n", \ + (VCPU)->run->exit_reason, \ + exit_reason_str((VCPU)->run->exit_reason)); \ + \ + TEST_ASSERT(((VCPU)->run->exit_reason == KVM_EXIT_IO) && \ + ((VCPU)->run->io.port == (PORT)) && \ + ((VCPU)->run->io.size == (SIZE)) && \ + ((VCPU)->run->io.direction == (DIR)), \ + "Got unexpected IO exit values: %u (%s) %d %d %d\n", \ + (VCPU)->run->exit_reason, \ + exit_reason_str((VCPU)->run->exit_reason), \ + (VCPU)->run->io.port, (VCPU)->run->io.size, \ + (VCPU)->run->io.direction); \ + } while (0) + +/** + * Check and report if there was some failure in the guest, either an exception + * like a triple fault, or if a tdx_test_fatal() was hit. + */ +#define TDX_TEST_CHECK_GUEST_FAILURE(VCPU) \ + do { \ + if ((VCPU)->run->exit_reason == KVM_EXIT_SYSTEM_EVENT) \ + TEST_FAIL("Guest reported error. error code: %lld (0x%llx)\n", \ + (VCPU)->run->system_event.data[1], \ + (VCPU)->run->system_event.data[1]); \ + } while (0) + /** * Assert that tdx_test_success() was called in the guest. */ 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 627d60b573bb6..885c2b6bb1b96 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -2,6 +2,7 @@ #include #include "kvm_util_base.h" +#include "tdx/tdcall.h" #include "tdx/tdx.h" #include "tdx/tdx_util.h" #include "tdx/test_util.h" @@ -73,6 +74,86 @@ void verify_report_fatal_error(void) printf("\t ... PASSED\n"); } +#define TDX_IOEXIT_TEST_PORT 0x50 + +/* + * Verifies IO functionality by writing a |value| to a predefined port. + * Verifies that the read value is |value| + 1 from the same port. + * If all the tests are passed then write a value to port TDX_TEST_PORT + */ +void guest_ioexit(void) +{ + uint64_t data_out, data_in, delta; + uint64_t ret; + + data_out = 0xAB; + ret = tdg_vp_vmcall_instruction_io(TDX_IOEXIT_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &data_out); + if (ret) + tdx_test_fatal(ret); + + ret = tdg_vp_vmcall_instruction_io(TDX_IOEXIT_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data_in); + if (ret) + tdx_test_fatal(ret); + + delta = data_in - data_out; + if (delta != 1) + tdx_test_fatal(ret); + + tdx_test_success(); +} + +void verify_td_ioexit(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + uint32_t port_data; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_ioexit); + td_finalize(vm); + + printf("Verifying TD IO Exit:\n"); + + /* Wait for guest to do a IO write */ + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IOEXIT_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + port_data = *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + printf("\t ... IO WRITE: OK\n"); + + /* + * Wait for the guest to do a IO read. Provide the previous written data + * + 1 back to the guest + */ + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IOEXIT_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = port_data + 1; + + printf("\t ... IO READ: OK\n"); + + /* + * Wait for the guest to complete execution successfully. The read + * value is checked within the guest. + */ + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_SUCCESS(vcpu); + + printf("\t ... IO verify read/write values: OK\n"); + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { setbuf(stdout, NULL); @@ -84,6 +165,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_td_lifecycle); run_in_new_process(&verify_report_fatal_error); + run_in_new_process(&verify_td_ioexit); return 0; }