From patchwork Tue Jul 25 22:01:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Afranji X-Patchwork-Id: 13327114 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 5371FC41513 for ; Tue, 25 Jul 2023 22:03:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230405AbjGYWDT (ORCPT ); Tue, 25 Jul 2023 18:03:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231910AbjGYWDC (ORCPT ); Tue, 25 Jul 2023 18:03:02 -0400 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 9E8FF30D8 for ; Tue, 25 Jul 2023 15:02:29 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5618857518dso58152437b3.2 for ; Tue, 25 Jul 2023 15:02:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1690322532; x=1690927332; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=BglVD3tTlL86xZX6Z5R3ezR3rNJJfc76ia5n59qv+aM=; b=zRhd85iuDOtshGYd/4Jep9VyX/mvBpjj+AMnE5r3esec0fcPCBEQMl/JEtx+EHjMRy 16c0nCer9NDvD9DmsZ3BrG0itoXxoO+MztpuF71UOBxCyoKNd+C3HOUK7PLIqo9+ZOvH xYTSy5ByZJ+0l88FzUodtOjMv2qOeeP75bBMkog7vCXKI3Muyaq+yCse7YYasGyoRbF2 Hj0G/gK4CE0yib7qHFTLRAMIFGQDVG6EiqdBvggA8DKdvxgvHKXLieeUN7hw50iXqA0F GXS0SBosCLT3aEk+lITLGy6tUisSuCL9Q8d78pAZh0Wcxciy/PnPxT9ZmVs+RQ+2rcnV WnlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690322532; x=1690927332; 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=BglVD3tTlL86xZX6Z5R3ezR3rNJJfc76ia5n59qv+aM=; b=Yp3m3bshd9RWJPLrDbpgRa0tLe/AkfM5usIjHk/tBz+Hi7n53aiJmaP+oqdJq7woXF A1uspwWylJFROU21sfslkjFnFQ8bhzK2PW26+62cjODSCQWVvtigxwdgnPZjH/rJfdU5 65nOYh3NDPs1E/jPLSv5V7SoqkmqoebWaFu+a8ZtlNtv7f+B34Op2lGeA9Nq9u+quaPf EpWGDDjtVkoQaZtmluciQGhfChvFRcO4E4WOAs9YO2Qzfdv3VQoLACtefVelx9HY+jma t+z2Id4wDCGZ01SL5rYeMn+3dM3bsaMvEej5+HcH7kHlEfa9jTYhkzU7lAh+qf1GtpH0 uDxA== X-Gm-Message-State: ABy/qLZ+Z6ZijNVPvKy6hDt6sfao9S7AJVSAbYFA07mWTigShGr1oFjn djlg7ZYLu/T+nBaIdx2m2GMyXZEB7+wwKSy+goJqjYWxAiy5mN1orOIEhFAGwjI/NwvtrL+BH9X J7z4b4am8cZHwvDYa0dQlLETxo5L7K7OIqFjp6LWjilQ1TKvRK1qXyVT2k3am0msMVNBm+P8X4D My X-Google-Smtp-Source: APBJJlGboFK0Pwxec1ZjSVCKt+ZgddJR8b1x55c9ByJsSn38G65QwUZX1hQ0ROLg6wiroNNOrrf9rj5p5hMr X-Received: from afranji.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:47f1]) (user=afranji job=sendgmr) by 2002:a81:ae49:0:b0:580:e6dc:e2df with SMTP id g9-20020a81ae49000000b00580e6dce2dfmr3700ywk.9.1690322532285; Tue, 25 Jul 2023 15:02:12 -0700 (PDT) Date: Tue, 25 Jul 2023 22:01:06 +0000 In-Reply-To: <20230725220132.2310657-1-afranji@google.com> Mime-Version: 1.0 References: <20230725220132.2310657-1-afranji@google.com> X-Mailer: git-send-email 2.41.0.487.g6d72f3e995-goog Message-ID: <20230725220132.2310657-14-afranji@google.com> Subject: [PATCH v4 13/28] KVM: selftests: TDX: Add TDX IO writes test From: Ryan Afranji 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, 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, ackerleytng@google.com Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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 Change-Id: I91edb81a93d7bfd881ccde517c95b5728a2ba85e Signed-off-by: Ryan Afranji --- .../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/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h index 78001bfec9c8..b5e94b7c48fa 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 +#define TDG_VP_VMCALL_SUCCESS 0x0000000000000000 +#define TDG_VP_VMCALL_INVALID_OPERAND 0x8000000000000000 + #define TDX_HCALL_HAS_OUTPUT BIT(0) #define TDX_HYPERCALL_STANDARD 0 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 9e9c3ad08a21..ca0136930775 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -339,6 +339,96 @@ void verify_get_td_vmcall_info(void) printf("\t ... PASSED\n"); } +#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 = 0xAB; + uint64_t byte_2 = 0xABCD; + uint64_t byte_4 = 0xFFABCDEF; + uint64_t ret; + + ret = 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 = 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 = 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 = 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 = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_io_writes); + td_finalize(vm); + + printf("Verifying guest writes:\n"); + + td_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 = *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + td_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 = *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + td_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 = *(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); + + td_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); + + 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); @@ -353,6 +443,7 @@ 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); return 0; }