From nobody Sun Sep 14 14:55:07 2025 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 7A820C25B50 for ; Sat, 21 Jan 2023 00:17:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230017AbjAUARy (ORCPT ); Fri, 20 Jan 2023 19:17:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229985AbjAUARf (ORCPT ); Fri, 20 Jan 2023 19:17:35 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 676B8CD21A for ; Fri, 20 Jan 2023 16:17:13 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id z9-20020a25ba49000000b007d4416e3667so7512930ybj.23 for ; Fri, 20 Jan 2023 16:17:13 -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=j6BV0YtQOiNrXMV5swymIknunfTEIhtzL+zfELVN7Ms=; b=l8az0f+ywIP6e260BtoZwU44Fhm7IcULO1Flblv5y1Y1LiZ/y7PKDffHyKWKkcxHNw KOWmv7uS/Xfu2NSm939NvnzW3uaCNDPHjv3W+IMXLDeZMzkhAJUE7lGBu2dPlPjNSPfL DeI6hQcFAF7QmYLhhlPjaOcp0Znt2M0/BEL4oesWn4F7j5jGAZm8nZ80ZtRDMmujgf+C CvkFThYu+v7NFEn7rLXXegNqaj9Jzw6M+w46LW8ueek/hizCwJecgABJOY/9v7PurAmZ yK/F1qsOl1p/Aoo8e7ext2gE2Q+0az8TOUQkMfg3cT/Ym33fPBlOkFZ+rX3yTSThtExj Rq1g== 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=j6BV0YtQOiNrXMV5swymIknunfTEIhtzL+zfELVN7Ms=; b=mhmRJhdPATaurKRiQsLENxdL/CGVUswUrMgy8A3JmX537tAGUGL6heef1+H/shqEdX kooqWDnAvO+CFKXPjzRSzL/6wrrNENZF920ZoKIIj05W60Tq8858nNO5JC4VRTTFOMyh Xxgbhsjq1dOtt3QWzJxzF6qW+qkpKP8TawfZKO4ZWqpsYein5a5y7hvJBAv4PP7KuLKA SwuFcJ+3OGDHcEOCcOBPMPZQXes9Uo21rp10ekw1DaHgKduZrV7ATbZvUcE0sp68t/2h ayhyvd2/OMNn4epbHKt4TNf4nO8eEpF54ZzufYBpMi/KVyNCD+jNMDCHe/Fuecwgr1BE WxHg== X-Gm-Message-State: AFqh2kpzX8u8dTqmix1cnHdPazcDnHwtG4RsfQZ8w1pDBeSDEZKtPM2v ztXuSYX8Hhxago4N0i3MTtwDAU0aFpkcLNH9tg== X-Google-Smtp-Source: AMrXdXufsM1UYiyJ7fOSO4EaXsXUPYSCdlhfrRAC6atQl4aixkchwbE7r5eeo2uBnFLuw4tNY0+2jTPRJ9IPEu7WMQ== X-Received: from ackerleytng-cloudtop-sg.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:b30]) (user=ackerleytng job=sendgmr) by 2002:a5b:a0b:0:b0:6fb:42d2:69e4 with SMTP id k11-20020a5b0a0b000000b006fb42d269e4mr1808452ybq.436.1674260233016; Fri, 20 Jan 2023 16:17:13 -0800 (PST) Date: Sat, 21 Jan 2023 00:15:25 +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: <20230121001542.2472357-15-ackerleytng@google.com> Subject: [RFC PATCH v3 14/31] KVM: selftests: TDX: Add TDX IO writes test 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-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Sagi Shahar The test verifies IO writes of various sizes from the guest to the host. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng --- .../selftests/kvm/include/x86_64/tdx/tdcall.h | 3 + .../selftests/kvm/x86_64/tdx_vm_tests.c | 91 +++++++++++++++++++ 2 files changed, 94 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h b/tool= s/testing/selftests/kvm/include/x86_64/tdx/tdcall.h index 78001bfec9c8d..b5e94b7c48fa5 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h @@ -10,6 +10,9 @@ #define TDG_VP_VMCALL_INSTRUCTION_IO_READ 0 #define TDG_VP_VMCALL_INSTRUCTION_IO_WRITE 1 =20 +#define TDG_VP_VMCALL_SUCCESS 0x0000000000000000 +#define TDG_VP_VMCALL_INVALID_OPERAND 0x8000000000000000 + #define TDX_HCALL_HAS_OUTPUT BIT(0) =20 #define TDX_HYPERCALL_STANDARD 0 diff --git a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c b/tools/test= ing/selftests/kvm/x86_64/tdx_vm_tests.c index 188442a734dca..ac23d1ad1e687 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -338,6 +338,96 @@ void verify_get_td_vmcall_info(void) printf("\t ... PASSED\n"); } =20 +#define TDX_IO_WRITES_TEST_PORT 0x51 + +/* + * Verifies IO functionality by writing values of different sizes + * to the host. + */ +void guest_io_writes(void) +{ + uint64_t byte_1 =3D 0xAB; + uint64_t byte_2 =3D 0xABCD; + uint64_t byte_4 =3D 0xFFABCDEF; + uint64_t ret; + + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &byte_1); + if (ret) + tdx_test_fatal(ret); + + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &byte_2); + if (ret) + tdx_test_fatal(ret); + + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &byte_4); + if (ret) + tdx_test_fatal(ret); + + // Write an invalid number of bytes. + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 5, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &byte_4); + if (ret) + tdx_test_fatal(ret); + + tdx_test_success(); +} + +void verify_guest_writes(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + uint8_t byte_1; + uint16_t byte_2; + uint32_t byte_4; + + vm =3D td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu =3D td_vcpu_add(vm, 0, guest_io_writes); + td_finalize(vm); + + printf("Verifying guest writes:\n"); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + byte_1 =3D *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + byte_2 =3D *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + byte_4 =3D *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + ASSERT_EQ(byte_1, 0xAB); + ASSERT_EQ(byte_2, 0xABCD); + ASSERT_EQ(byte_4, 0xFFABCDEF); + + vcpu_run(vcpu); + ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT); + ASSERT_EQ(vcpu->run->system_event.data[1], TDG_VP_VMCALL_INVALID_OPERAND); + + 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); @@ -352,6 +442,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_td_ioexit); run_in_new_process(&verify_td_cpuid); run_in_new_process(&verify_get_td_vmcall_info); + run_in_new_process(&verify_guest_writes); =20 return 0; } --=20 2.39.0.246.g2a6d74b583-goog