From patchwork Tue Dec 12 20:46:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sagi Shahar X-Patchwork-Id: 753268 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="c+xXdegY" 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 EE6F52125 for ; Tue, 12 Dec 2023 12:47:52 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5d749e4fa3dso76113727b3.1 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=1702414072; x=1703018872; 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=c+xXdegYuCLIzMpK1wqjjpEBsZ3P55jFe4ZwmICAMcSiQ23B3Ru+Aghc88Xh0OZazr A1NZz/VwuLXLVINEPI/B8liuqzf8fqjqSQEH7VuQhnXnjwEkW6odAPMBtRdEStly1Fod iQIkmoMo8z226Po8HUqzwajGJZZ/8UnBGb1Z2G/ypIoyVMTIrI7yKBklzczTEhjND7zF vZhhgGNr+B9QeVSt80m1Zwdb7VUsjJNAOlo+T3a4kkN3grVzvcOPtC84XS312Yl7L3V2 If5HPkCmEvy3K6XfzAMDn9FAnBZLANr8FJQ36CdOI1MF/mQNUcT96Y9pVMD35/Km5J81 ErbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414072; x=1703018872; 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=pgulKcJe5TAD0w8A8yhutX/No6uwAml4SYWpDo4dC8Us4Zx0yR2Pbr0+ViM1NhpxWK Wo+MOEsSaehzCKPbWwpoBk2QEm43kv95nB92lHasAMtVpnW3o7Be0Ktq6ctCfRFSoHad O13juHsPVCbP/19y+p8YLWMzDflXbDnnGjXctLSVcdH5Oz9iqn99pkKGZzDbNdMbMOYt Zg5URTJEqWdU7vMs8hJJzPA1X1lZFjZRnZS7n9/zZHbuSd2ENyOdHVVFtZVuaoa2RJQG 7T6kWmQE1QZ5gxTH8KioPmqVkmGluYH8OeFFXl1DCmRcKE/yY2FN3Fb2ZG4jGIr99STJ V0LQ== X-Gm-Message-State: AOJu0Yyd/eyiMltpOl5n29CifblECuYCCkY2XObcb8ZR+LThNCM0BoL4 joV12Kmm40Yc1vv8CqY84Yu6JFj5Qe/3cWGCfYrxD/FlhZ5EFMpIfiK5dcVEZ8bOScFMVzanj4q L3g5Ha9pQMxoRwwzsG5jKW0vXOeVR4UgrNR2TKSPns8143zSSyUBZly0dMACVhyIX20IdQoc= 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> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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/testing/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 = 0; continue; + } else if (handle_conversions && + vcpu->run->exit_reason == KVM_EXIT_MEMORY_FAULT) { + handle_memory_conversion( + vm, vcpu->run->memory_fault.gpa, + vcpu->run->memory_fault.size, + vcpu->run->memory_fault.flags == KVM_MEMORY_EXIT_FLAG_PRIVATE); + continue; } else if ( vcpu->run->exit_reason == KVM_EXIT_IO && vcpu->run->io.port == TDX_UPM_TEST_ACCEPT_PRINT_PORT) { @@ -243,8 +250,53 @@ static void guest_upm_explicit(void) tdx_test_success(); } +static void guest_upm_implicit(void) +{ + struct tdx_upm_test_area *test_area_gva_private = + (struct tdx_upm_test_area *)TDX_UPM_TEST_AREA_GVA_PRIVATE; + struct tdx_upm_test_area *test_area_gva_shared = + (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_AGAIN); + + /* Check that guest can use private memory after focus area is remapped as 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."); - 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."); - 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); } -static void verify_upm_test(void) +static void verify_upm_test(bool implicit) { struct kvm_vm *vm; struct kvm_vcpu *vcpu; + void *guest_code; vm_vaddr_t test_area_gva_private; struct tdx_upm_test_area *test_area_base_hva; uint64_t test_area_npages; vm = td_create(); td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); - vcpu = td_vcpu_add(vm, 0, guest_upm_explicit); + guest_code = implicit ? guest_upm_implicit : guest_upm_explicit; + vcpu = td_vcpu_add(vm, 0, guest_code); vm_install_exception_handler(vm, VE_VECTOR, guest_ve_handler); @@ -379,13 +433,26 @@ static void verify_upm_test(void) td_finalize(vm); - printf("Verifying UPM functionality: explicit MapGPA\n"); + if (implicit) + printf("Verifying UPM functionality: implicit conversion\n"); + else + printf("Verifying UPM functionality: explicit MapGPA\n"); - run_selftest(vm, vcpu, test_area_base_hva); + run_selftest(vm, vcpu, test_area_base_hva, implicit); kvm_vm_free(vm); } +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; } - run_in_new_process(&verify_upm_test); + run_in_new_process(&verify_upm_test_explicit); + run_in_new_process(&verify_upm_test_implicit); }