From patchwork Sat Jan 21 00:15:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ackerley Tng X-Patchwork-Id: 13110740 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 24170C05027 for ; Sat, 21 Jan 2023 00:18:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230042AbjAUASW (ORCPT ); Fri, 20 Jan 2023 19:18:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230014AbjAUASF (ORCPT ); Fri, 20 Jan 2023 19:18:05 -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 938CCC63B1 for ; Fri, 20 Jan 2023 16:17:40 -0800 (PST) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-4fa63c84621so64448557b3.20 for ; Fri, 20 Jan 2023 16:17:40 -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=JbxOOqD+pwQw9GweUHv05gGISRszsuPq3GR2Y2VtJ2g=; b=tWSIGxxE0vaZiNmZxyVKpGgbuHSCV8Bs+2krR8P4CkG6Wk6ZJBEvprkyMZ46ROpBFr dtz/gVeX28QK8hr2zlBSJJX0elXAxsmTCByVEtwkV+yfBtOIuHh5lARNQWvKoF8jqvsJ QuvaGrvGtRvza/3LdTRpslfgTlpuCxCRKWgfGZRcuPQ80vZTkY3AWxaoi3aT5A2vd6kE q/624HqznaCWeXVU5MHfEJ5SMpQi0MfVWW71sLe99oNZapAMd6ftkXWUnwwqYNuOLFPZ Afi6R5epM+l3M2PIgDQHvG6hbBFDDRuYiv8a5r6EYPqNV0eN9gVrrD0eklr+dB3PLYMR 33nA== 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=JbxOOqD+pwQw9GweUHv05gGISRszsuPq3GR2Y2VtJ2g=; b=5A1s+pjfRSrTkzrug1WXIPBIqlvFKloLoVEZtnlTkJrORquLo6oKLVhpxBsW48lIKQ xlYbT1RfPZPfF0xwCiDPSFerID1oluvbmgwdGDBoWBTjME3k+rREyPxyk+w75dRnQtY3 ijihkgGFidbKbA+DutboneKjpIGLtlay2AjiJAD046Y86qgKl31pnDcVBK7GMbUGIRof k2cwq4sF0jTltEXSizncAA19tQ/PYZXBNZKNRnlnC3zvmF1MsyLsBbzyPoBIUHK3AvX8 J09lSrV0+7ZpeEZMnXydh9tNKLE/TxzI24+gj2mFA2nhNxTdL3bjq3JDFbMoHkM9dmKV FGmg== X-Gm-Message-State: AFqh2kpuEBH1b+/mp4H7lt279plto9M+wZ4VYz0Wz7QyRtEfME9PBrhh cyFp98ha/QuCSHN/Nvs+kN+f05lmMTgEjQnHwg== X-Google-Smtp-Source: AMrXdXteIywN3dWsGdBSd7kHWIeUZrhBm+8A+16wAnzf+wCy6Rbp8NIKiduVWk/xfFrrTDonNbk6QyimimoKOvCacw== X-Received: from ackerleytng-cloudtop-sg.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:b30]) (user=ackerleytng job=sendgmr) by 2002:a25:7316:0:b0:802:5d7f:db9f with SMTP id o22-20020a257316000000b008025d7fdb9fmr292409ybc.182.1674260237241; Fri, 20 Jan 2023 16:17:17 -0800 (PST) Date: Sat, 21 Jan 2023 00:15:26 +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: <20230121001542.2472357-16-ackerleytng@google.com> Subject: [RFC PATCH v3 15/31] KVM: selftests: TDX: Add TDX IO reads 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: kvm@vger.kernel.org From: Sagi Shahar The test verifies IO reads of various sizes from the host to the guest. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng --- .../selftests/kvm/x86_64/tdx_vm_tests.c | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) 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 ac23d1ad1e687..71aa4e5907a05 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -428,6 +428,92 @@ void verify_guest_writes(void) printf("\t ... PASSED\n"); } +#define TDX_IO_READS_TEST_PORT 0x52 + +/* + * Verifies IO functionality by reading values of different sizes + * from the host. + */ +void guest_io_reads(void) +{ + uint64_t data; + uint64_t ret; + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data != 0xAB) + tdx_test_fatal(1); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data != 0xABCD) + tdx_test_fatal(2); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data != 0xFFABCDEF) + tdx_test_fatal(4); + + // Read an invalid number of bytes. + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 5, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + + tdx_test_success(); +} + +void verify_guest_reads(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_io_reads); + td_finalize(vm); + + printf("Verifying guest reads:\n"); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xAB; + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xABCD; + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 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); @@ -443,6 +529,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_td_cpuid); run_in_new_process(&verify_get_td_vmcall_info); run_in_new_process(&verify_guest_writes); + run_in_new_process(&verify_guest_reads); return 0; }