From nobody Sun Dec 28 06:38:04 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 52767C4332F for ; Tue, 12 Dec 2023 20:48:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377432AbjLLUsk (ORCPT ); Tue, 12 Dec 2023 15:48:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235180AbjLLUsM (ORCPT ); Tue, 12 Dec 2023 15:48:12 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F296173C for ; Tue, 12 Dec 2023 12:47:34 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5e175c8b326so21388587b3.2 for ; Tue, 12 Dec 2023 12:47:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702414051; x=1703018851; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=mgr9hweDYRXBGfxKvpySsIK8PkryOfdG9AXrBZT3Fps=; b=JY5LJD4K90PQbgBzv1Xi3PdxBwRktSYWxAyB2m/rKQENg6cmOMn5286I2Aa8qD26Df Z6CTSwRuS6uuBZ2I4GH3wnIvyBoFdlIAFVCntwrIQ3HLaUSAuy1ot2kACYBQtAqf0XgV kFXABvX0nU9ytQLPphvQOANuBNukaDL07BNJ5BpEVwaVem6glx87kXqI/7Qorbo19ZQi bJPysTemt6ziby4h5aE0BC7hIydxCDjoUE9XPFEwru8GwPB6N8FOW8AvcmffAoTwMaQm i2apSmHCs9ekOA+vJ86RA8ce+AlV6pzaksgNDRUqf416mpeVi2+jd5rnFOrQ4RGbU6FU Yg1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414051; x=1703018851; 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=mgr9hweDYRXBGfxKvpySsIK8PkryOfdG9AXrBZT3Fps=; b=UUQYeaHlSfDxCUo+mzFWd28ihOSH1fpfy+lToS1B3Xd1QSQi5zatUeYSvPU47X11NW 8ii33kW/iWAknjnwPqt1rL9oFDm73cBGmmicjvrzw+5wDzI7r4TNRnSI7ryNgVYAqFrT 6XoXkaHzZ7m4zeRJB6U4doJDpSwX9hJ9yyzgAd1YvOaQmdH3OA2Wcj3nQ0yWnoKyRoLD g9QUYDNHie3qhqpB4bSN2+Q0rENiSF5ZIeANDv8rxZiM+lqCrd/7BjB3bx3N+XIvi2E6 AquzvbLfKmxSYpSXeUg3XcKPSi1bzWA6ekc2hb0/iwnFUfITJ2JvOEtGn81uBYgUgfOa jAYg== X-Gm-Message-State: AOJu0Yzhtc2gixuocIBTU3j23VAwwioQ1nKYeyrtL6bueqOOS9UkoC5v LM1zriFx5MIgv5PBXGyfR3HMMFTK+g== X-Google-Smtp-Source: AGHT+IFa6/BElmwp62s37oh5bb6TTi74TXb4OER5yGDKiFW8lPfpShKreGwImjiGSMuYBWqXsZdh2473vw== X-Received: from sagi.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:241b]) (user=sagis job=sendgmr) by 2002:a05:690c:3506:b0:5d9:447a:43e8 with SMTP id fq6-20020a05690c350600b005d9447a43e8mr67267ywb.5.1702414051607; Tue, 12 Dec 2023 12:47:31 -0800 (PST) Date: Tue, 12 Dec 2023 12:46:33 -0800 In-Reply-To: <20231212204647.2170650-1-sagis@google.com> Mime-Version: 1.0 References: <20231212204647.2170650-1-sagis@google.com> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog Message-ID: <20231212204647.2170650-19-sagis@google.com> Subject: [RFC PATCH v5 18/29] KVM: selftests: TDX: Add TDX MMIO writes test From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Ackerley Tng , Ryan Afranji , Erdem Aktas , Sagi Shahar , Isaku Yamahata Cc: Sean Christopherson , Paolo Bonzini , Shuah Khan , Peter Gonda , Haibo Xu , Chao Peng , Vishal Annapurve , Roger Wang , Vipin Sharma , jmattson@google.com, dmatlack@google.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The test verifies MMIO writes of various sizes from the guest to the host. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng Signed-off-by: Ryan Afranji --- .../selftests/kvm/include/x86_64/tdx/tdx.h | 2 + .../selftests/kvm/lib/x86_64/tdx/tdx.c | 14 +++ .../selftests/kvm/x86_64/tdx_vm_tests.c | 85 +++++++++++++++++++ 3 files changed, 101 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h b/tools/t= esting/selftests/kvm/include/x86_64/tdx/tdx.h index 13ce60df5684..502b670ea699 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h @@ -25,5 +25,7 @@ uint64_t tdg_vp_vmcall_instruction_wrmsr(uint64_t index, = uint64_t value); uint64_t tdg_vp_vmcall_instruction_hlt(uint64_t interrupt_blocked_flag); uint64_t tdg_vp_vmcall_ve_request_mmio_read(uint64_t address, uint64_t siz= e, uint64_t *data_out); +uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t si= ze, + uint64_t data_in); =20 #endif // SELFTEST_TDX_TDX_H diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c b/tools/testi= ng/selftests/kvm/lib/x86_64/tdx/tdx.c index b19f07ebc0e7..f4afa09f7e3d 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c @@ -143,3 +143,17 @@ uint64_t tdg_vp_vmcall_ve_request_mmio_read(uint64_t a= ddress, uint64_t size, =20 return ret; } + +uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t si= ze, + uint64_t data_in) +{ + struct tdx_hypercall_args args =3D { + .r11 =3D TDG_VP_VMCALL_VE_REQUEST_MMIO, + .r12 =3D size, + .r13 =3D TDG_VP_VMCALL_VE_REQUEST_MMIO_WRITE, + .r14 =3D address, + .r15 =3D data_in, + }; + + return __tdx_hypercall(&args, 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 48902b69d13e..5e28ba828a92 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -885,6 +885,90 @@ void verify_mmio_reads(void) printf("\t ... PASSED\n"); } =20 +void guest_mmio_writes(void) +{ + uint64_t ret; + + ret =3D tdg_vp_vmcall_ve_request_mmio_write(TDX_MMIO_TEST_ADDR, 1, 0x12); + if (ret) + tdx_test_fatal(ret); + + ret =3D tdg_vp_vmcall_ve_request_mmio_write(TDX_MMIO_TEST_ADDR, 2, 0x1234= ); + if (ret) + tdx_test_fatal(ret); + + ret =3D tdg_vp_vmcall_ve_request_mmio_write(TDX_MMIO_TEST_ADDR, 4, 0x1234= 5678); + if (ret) + tdx_test_fatal(ret); + + ret =3D tdg_vp_vmcall_ve_request_mmio_write(TDX_MMIO_TEST_ADDR, 8, 0x1234= 567890ABCDEF); + if (ret) + tdx_test_fatal(ret); + + // Write across page boundary. + ret =3D tdg_vp_vmcall_ve_request_mmio_write(PAGE_SIZE - 1, 8, 0); + if (ret) + tdx_test_fatal(ret); + + tdx_test_success(); +} + +/* + * Varifies guest MMIO writes. + */ +void verify_mmio_writes(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + uint8_t byte_1; + uint16_t byte_2; + uint32_t byte_4; + uint64_t byte_8; + + vm =3D td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu =3D td_vcpu_add(vm, 0, guest_mmio_writes); + td_finalize(vm); + + printf("Verifying TD MMIO writes:\n"); + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_MMIO(vcpu, TDX_MMIO_TEST_ADDR, 1, TDG_VP_VMCALL_VE_REQUES= T_MMIO_WRITE); + byte_1 =3D *(uint8_t *)(vcpu->run->mmio.data); + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_MMIO(vcpu, TDX_MMIO_TEST_ADDR, 2, TDG_VP_VMCALL_VE_REQUES= T_MMIO_WRITE); + byte_2 =3D *(uint16_t *)(vcpu->run->mmio.data); + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_MMIO(vcpu, TDX_MMIO_TEST_ADDR, 4, TDG_VP_VMCALL_VE_REQUES= T_MMIO_WRITE); + byte_4 =3D *(uint32_t *)(vcpu->run->mmio.data); + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_MMIO(vcpu, TDX_MMIO_TEST_ADDR, 8, TDG_VP_VMCALL_VE_REQUES= T_MMIO_WRITE); + byte_8 =3D *(uint64_t *)(vcpu->run->mmio.data); + + TEST_ASSERT_EQ(byte_1, 0x12); + TEST_ASSERT_EQ(byte_2, 0x1234); + TEST_ASSERT_EQ(byte_4, 0x12345678); + TEST_ASSERT_EQ(byte_8, 0x1234567890ABCDEF); + + td_vcpu_run(vcpu); + TEST_ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT); + TEST_ASSERT_EQ(vcpu->run->system_event.data[1], TDG_VP_VMCALL_INVALID_OPE= RAND); + + td_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); @@ -905,6 +989,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_guest_msr_reads); run_in_new_process(&verify_guest_hlt); run_in_new_process(&verify_mmio_reads); + run_in_new_process(&verify_mmio_writes); =20 return 0; } --=20 2.43.0.472.g3155946c3a-goog