From nobody Sun Dec 28 06:38:07 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 9D668C4332F for ; Tue, 12 Dec 2023 20:50:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377454AbjLLUuJ (ORCPT ); Tue, 12 Dec 2023 15:50:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377428AbjLLUto (ORCPT ); Tue, 12 Dec 2023 15:49:44 -0500 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 751BD2120 for ; Tue, 12 Dec 2023 12:47:52 -0800 (PST) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5e19414f714so21999057b3.0 for ; Tue, 12 Dec 2023 12:47:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702414071; x=1703018871; 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=9b8Rem1AmPjfYzBNcLPCGf0Ya+tJ/F2me7CGYJ1U7yY=; b=yUA+G3z7D9ewA7kk8Dj883hsjAJfjykoePzI01xOmdxe4tCxT4x+wG4cCLW2kAsBP6 mNEKqhK1Ue5tt0sd2wrRQKvJGkJ+3XtIKdjNYmZERe9abuyCyWR2K7cpPRYP1EwdbXYI YZYczvg49rClwUzXxVXCWSHBqPzngwYLDaneTyuaVgAGKCZdaqzPbQKAD2XKTCpoZv4l VzODXpZUGHDDPmgurdSJUrbOJuzvPDVl2yUaDGhm9+T8lFnK7+RwUQLdfQi5motCyXBQ KFk1WB/o1hsOHQBaCRYeYosPA8cImlfQCVUtykOzQxYEvrUNlBJbOx2EHdgABigCU9et cdcQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414071; x=1703018871; 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=9b8Rem1AmPjfYzBNcLPCGf0Ya+tJ/F2me7CGYJ1U7yY=; b=rK7na27k4mZ6X2l5L4HwYDfrORkzMSEKjEFjKCLJ4o+2+FMUqu2NSE/p8RLzWuTGQp CkjJcAOncAx07VSemI6SxtA8oTXtDBfRQvB8KatbYvoBn2QcvJ78/732vhot1wKCF0g8 sCUzQBLY7zFtdXyS2rMFrvWfd9rMVhmuBHrBrcHBmJ9Yz0wAd2RhSiUmW6IQP/tVDnEU 0/CTaFmIxszXOiNU7MeTKggamDGzYyprgCqrxovTzAUZp7xHU3yKtAePj5jhnM7yuyzG 8BCoq+1CbICR+e0esH5/DyP2hy/4AEpmm28SUe/9Kmts/M9FMcATbO+Sbkkx11vqGzN8 Z9mQ== X-Gm-Message-State: AOJu0YwBjgJeOY1M4mDx9nyRNtPxH3wh8rK9pwU57mnMPWaBuZtaITca 7HEwMjoHCyZjKjt5Ct8Tyk5TuaZUvQ== X-Google-Smtp-Source: AGHT+IFxV+KrDYmcwmn1PDxvzNdlpDP4pWeOD1xeuiQDvWiuL5pZVy4R12KnOvAQ3fLYUpwzgPkXIIMt+Q== X-Received: from sagi.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:241b]) (user=sagis job=sendgmr) by 2002:a05:690c:891:b0:5d8:eec5:f57c with SMTP id cd17-20020a05690c089100b005d8eec5f57cmr64746ywb.4.1702414070805; Tue, 12 Dec 2023 12:47:50 -0800 (PST) Date: Tue, 12 Dec 2023 12:46:44 -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: <20231212204647.2170650-30-sagis@google.com> Subject: [RFC PATCH v5 29/29] KVM: selftests: TDX: Add TDX UPM selftests for implicit conversion 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" From: Ackerley Tng This tests the use of guest memory without explicit MapGPA calls. Signed-off-by: Ackerley Tng Signed-off-by: Ryan Afranji Signed-off-by: Sagi Shahar --- .../selftests/kvm/x86_64/tdx_upm_test.c | 86 +++++++++++++++++-- 1 file changed, 77 insertions(+), 9 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/tdx_upm_test.c b/tools/test= ing/selftests/kvm/x86_64/tdx_upm_test.c index 44671874a4f1..bfa921f125a0 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_upm_test.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_upm_test.c @@ -149,7 +149,7 @@ enum { * Does vcpu_run, and also manages memory conversions if requested by the = TD. */ void vcpu_run_and_manage_memory_conversions(struct kvm_vm *vm, - struct kvm_vcpu *vcpu) + struct kvm_vcpu *vcpu, bool handle_conversions) { for (;;) { vcpu_run(vcpu); @@ -163,6 +163,13 @@ void vcpu_run_and_manage_memory_conversions(struct kvm= _vm *vm, !(vm->arch.s_bit & vmcall_info->in_r12)); vmcall_info->status_code =3D 0; continue; + } else if (handle_conversions && + vcpu->run->exit_reason =3D=3D KVM_EXIT_MEMORY_FAULT) { + handle_memory_conversion( + vm, vcpu->run->memory_fault.gpa, + vcpu->run->memory_fault.size, + vcpu->run->memory_fault.flags =3D=3D KVM_MEMORY_EXIT_FLAG_PRIVATE); + continue; } else if ( vcpu->run->exit_reason =3D=3D KVM_EXIT_IO && vcpu->run->io.port =3D=3D TDX_UPM_TEST_ACCEPT_PRINT_PORT) { @@ -243,8 +250,53 @@ static void guest_upm_explicit(void) tdx_test_success(); } =20 +static void guest_upm_implicit(void) +{ + struct tdx_upm_test_area *test_area_gva_private =3D + (struct tdx_upm_test_area *)TDX_UPM_TEST_AREA_GVA_PRIVATE; + struct tdx_upm_test_area *test_area_gva_shared =3D + (struct tdx_upm_test_area *)TDX_UPM_TEST_AREA_GVA_SHARED; + + /* Check: host reading private memory does not modify guest's view */ + fill_test_area(test_area_gva_private, PATTERN_GUEST_GENERAL); + + tdx_test_report_to_user_space(SYNC_CHECK_READ_PRIVATE_MEMORY_FROM_HOST); + + TDX_UPM_TEST_ASSERT( + check_test_area(test_area_gva_private, PATTERN_GUEST_GENERAL)); + + /* Use focus area as shared */ + fill_focus_area(test_area_gva_shared, PATTERN_GUEST_FOCUS); + + /* General areas should not be affected */ + TDX_UPM_TEST_ASSERT( + check_general_areas(test_area_gva_private, PATTERN_GUEST_GENERAL)); + + tdx_test_report_to_user_space(SYNC_CHECK_READ_SHARED_MEMORY_FROM_HOST); + + /* Check that guest has the same view of shared memory */ + TDX_UPM_TEST_ASSERT( + check_focus_area(test_area_gva_shared, PATTERN_HOST_FOCUS)); + + /* Use focus area as private */ + fill_focus_area(test_area_gva_private, PATTERN_GUEST_FOCUS); + + /* General areas should be unaffected by remapping */ + TDX_UPM_TEST_ASSERT( + check_general_areas(test_area_gva_private, PATTERN_GUEST_GENERAL)); + + tdx_test_report_to_user_space(SYNC_CHECK_READ_PRIVATE_MEMORY_FROM_HOST_AG= AIN); + + /* Check that guest can use private memory after focus area is remapped a= s private */ + TDX_UPM_TEST_ASSERT( + fill_and_check(test_area_gva_private, PATTERN_GUEST_GENERAL)); + + tdx_test_success(); +} + static void run_selftest(struct kvm_vm *vm, struct kvm_vcpu *vcpu, - struct tdx_upm_test_area *test_area_base_hva) + struct tdx_upm_test_area *test_area_base_hva, + bool implicit) { vcpu_run(vcpu); TDX_TEST_CHECK_GUEST_FAILURE(vcpu); @@ -263,7 +315,7 @@ static void run_selftest(struct kvm_vm *vm, struct kvm_= vcpu *vcpu, TEST_ASSERT(check_test_area(test_area_base_hva, PATTERN_CONFIDENCE_CHECK), "Host should read PATTERN_CONFIDENCE_CHECK from guest's private memory."= ); =20 - vcpu_run_and_manage_memory_conversions(vm, vcpu); + vcpu_run_and_manage_memory_conversions(vm, vcpu, implicit); TDX_TEST_CHECK_GUEST_FAILURE(vcpu); TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, TDX_TEST_REPORT_SIZE, TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); @@ -280,7 +332,7 @@ static void run_selftest(struct kvm_vm *vm, struct kvm_= vcpu *vcpu, TEST_ASSERT(check_focus_area(test_area_base_hva, PATTERN_HOST_FOCUS), "Host should be able to use shared memory."); =20 - vcpu_run_and_manage_memory_conversions(vm, vcpu); + vcpu_run_and_manage_memory_conversions(vm, vcpu, implicit); TDX_TEST_CHECK_GUEST_FAILURE(vcpu); TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, TDX_TEST_REPORT_SIZE, TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); @@ -329,18 +381,20 @@ static void guest_ve_handler(struct ex_regs *regs) TDX_UPM_TEST_ASSERT(!ret); } =20 -static void verify_upm_test(void) +static void verify_upm_test(bool implicit) { struct kvm_vm *vm; struct kvm_vcpu *vcpu; =20 + void *guest_code; vm_vaddr_t test_area_gva_private; struct tdx_upm_test_area *test_area_base_hva; uint64_t test_area_npages; =20 vm =3D td_create(); td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); - vcpu =3D td_vcpu_add(vm, 0, guest_upm_explicit); + guest_code =3D implicit ? guest_upm_implicit : guest_upm_explicit; + vcpu =3D td_vcpu_add(vm, 0, guest_code); =20 vm_install_exception_handler(vm, VE_VECTOR, guest_ve_handler); =20 @@ -379,13 +433,26 @@ static void verify_upm_test(void) =20 td_finalize(vm); =20 - printf("Verifying UPM functionality: explicit MapGPA\n"); + if (implicit) + printf("Verifying UPM functionality: implicit conversion\n"); + else + printf("Verifying UPM functionality: explicit MapGPA\n"); =20 - run_selftest(vm, vcpu, test_area_base_hva); + run_selftest(vm, vcpu, test_area_base_hva, implicit); =20 kvm_vm_free(vm); } =20 +void verify_upm_test_explicit(void) +{ + verify_upm_test(false); +} + +void verify_upm_test_implicit(void) +{ + verify_upm_test(true); +} + int main(int argc, char **argv) { /* Disable stdout buffering */ @@ -397,5 +464,6 @@ int main(int argc, char **argv) return 0; } =20 - run_in_new_process(&verify_upm_test); + run_in_new_process(&verify_upm_test_explicit); + run_in_new_process(&verify_upm_test_implicit); } --=20 2.43.0.472.g3155946c3a-goog