From patchwork Sat Jan 21 00:15:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ackerley Tng X-Patchwork-Id: 13110747 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 60C76C05027 for ; Sat, 21 Jan 2023 00:19:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229988AbjAUAS7 (ORCPT ); Fri, 20 Jan 2023 19:18:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230162AbjAUASj (ORCPT ); Fri, 20 Jan 2023 19:18:39 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0066917C8 for ; Fri, 20 Jan 2023 16:18:04 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id n203-20020a2572d4000000b0078f09db9888so7427784ybc.18 for ; Fri, 20 Jan 2023 16:18:04 -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=vOwGtki9KFPboHEALtokyYZ7SUKgOo9ywAkWpYTPLlY=; b=GNQli3vbWyBQzWxSUIC96W0IJYbF/Ojtzs3NaAk6EebJ69mMu9B+S0lR/AJ9VJNhM+ +P4JZw6H/PyqDMcyw3GGXZIdf/Mrzaek7lKsK5lapeiukAg4Q+GsGhb35Iveh2wG2Tqp /lI8101PQATC701yjLYNZ/0O+drh4usGew30l4ALSElGN4St029Q+bITRmxWi6h9N5C1 0c3FrL2OGNPIpjK9SEuo3Z/HOPkIMlGSs756uoHPN+TOgAfAnHFf3k7cjJv4oa+iakWO SiZJdc/Y+YwlsFlLLBMvrFt/tFkHq8Ovxm1JcaxykTQ8QxByz5py1XYnkLuq4pfN9ALw 780Q== 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=vOwGtki9KFPboHEALtokyYZ7SUKgOo9ywAkWpYTPLlY=; b=5tsNUMMOfbhIB9VkndgAeYPrErwkwh7TEJRynAv53nH92GLRD7ZCtUMUnhzuTx7jdr rWQXTYJLPHIAW7eUQwUxqfy7f90oQTutgF3nz2zjZOxy2jgAuLhxa6aIF9QHyISb0dSw jij6IZ0+blm527A+OuiDqfbxwJ5i1cdh44Ogt7AvdyXCbQbbIfH9p489eEopbpEYjVo4 S8Fho2olnzhWz4WsxS4pFYG9oXQy63uQ/hvlfssNKcsIHnUpx5VQoC93t84L2SlAr+LN 0VBUjL8wBphYgRfKnjQc259NtfgYGp6Xajr4yOF+Gg8//ghYNjYxHXxYt0MFsirUlWqe VP0Q== X-Gm-Message-State: AFqh2koVn5+w35Y4KgaoAIqDlr4OPm7pdLqYp8lK3zn2fMIRpo/cdITX k9bLyM1jTgISwWNDcUFOxtFAqs6w+KFlXZxYy6+PsH3OZGgrp9xEhFjfI1hrc5a2pkU3jZs71ed SHdA5SxYAZREKf8+hehQUlzRcZHfLxJQkgCGo8UlKqW1Ebp3SK04HMdbX9IgG7m6LaAu17Zlzrf UXA+KtaMWv4dw= X-Google-Smtp-Source: AMrXdXuSW1/3B2FF32Z+SDnMOS3ZH7UUnyhC9T3Hm4i/Pcki1sMFzn9oqHPTA56gsX45+48sstycBezE8mJwl0r8/A== X-Received: from ackerleytng-cloudtop-sg.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:b30]) (user=ackerleytng job=sendgmr) by 2002:a81:3985:0:b0:3ef:cbd2:224d with SMTP id g127-20020a813985000000b003efcbd2224dmr2465407ywa.459.1674260259812; Fri, 20 Jan 2023 16:17:39 -0800 (PST) Date: Sat, 21 Jan 2023 00:15:31 +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: <20230121001542.2472357-21-ackerleytng@google.com> Subject: [RFC PATCH v3 20/31] KVM: selftests: TDX: Add TDX CPUID TDVMCALL 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: linux-kselftest@vger.kernel.org From: Sagi Shahar This test issues a CPUID TDVMCALL from inside the guest to get the CPUID values as seen by KVM. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng --- .../selftests/kvm/include/x86_64/tdx/tdx.h | 4 + .../selftests/kvm/lib/x86_64/tdx/tdx.c | 26 +++++ .../selftests/kvm/x86_64/tdx_vm_tests.c | 94 +++++++++++++++++++ 3 files changed, 124 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h index f2a90ad8a55c6..e746372206a25 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h @@ -7,6 +7,7 @@ #define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000 #define TDG_VP_VMCALL_REPORT_FATAL_ERROR 0x10003 +#define TDG_VP_VMCALL_INSTRUCTION_CPUID 10 #define TDG_VP_VMCALL_INSTRUCTION_HLT 12 #define TDG_VP_VMCALL_INSTRUCTION_IO 30 #define TDG_VP_VMCALL_INSTRUCTION_RDMSR 31 @@ -26,5 +27,8 @@ uint64_t tdg_vp_vmcall_ve_request_mmio_read(uint64_t address, uint64_t size, uint64_t *data_out); uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t size, uint64_t data_in); +uint64_t tdg_vp_vmcall_instruction_cpuid(uint32_t eax, uint32_t ecx, + uint32_t *ret_eax, uint32_t *ret_ebx, + uint32_t *ret_ecx, uint32_t *ret_edx); #endif // SELFTEST_TDX_TDX_H diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c index 8b12ac7049572..d9d60dd58dfdd 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c @@ -136,3 +136,29 @@ uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t size, return __tdx_hypercall(&args, 0); } + +uint64_t tdg_vp_vmcall_instruction_cpuid(uint32_t eax, uint32_t ecx, + uint32_t *ret_eax, uint32_t *ret_ebx, + uint32_t *ret_ecx, uint32_t *ret_edx) +{ + uint64_t ret; + struct tdx_hypercall_args args = { + .r11 = TDG_VP_VMCALL_INSTRUCTION_CPUID, + .r12 = eax, + .r13 = ecx, + }; + + + ret = __tdx_hypercall(&args, TDX_HCALL_HAS_OUTPUT); + + if (ret_eax) + *ret_eax = args.r12; + if (ret_ebx) + *ret_ebx = args.r13; + if (ret_ecx) + *ret_ecx = args.r14; + if (ret_edx) + *ret_edx = args.r15; + + return ret; +} 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 dcc0940a74e92..b9d96b5f6521f 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -976,6 +976,99 @@ void verify_mmio_writes(void) printf("\t ... PASSED\n"); } +/* + * Verifies CPUID TDVMCALL functionality. + * The guest will then send the values to userspace using an IO write to be + * checked against the expected values. + */ +void guest_code_cpuid_tdcall(void) +{ + uint64_t err; + uint32_t eax, ebx, ecx, edx; + + // Read CPUID leaf 0x1 from host. + err = tdg_vp_vmcall_instruction_cpuid(/*eax=*/1, /*ecx=*/0, + &eax, &ebx, &ecx, &edx); + if (err) + tdx_test_fatal(err); + + err = tdx_test_report_to_user_space(eax); + if (err) + tdx_test_fatal(err); + + err = tdx_test_report_to_user_space(ebx); + if (err) + tdx_test_fatal(err); + + err = tdx_test_report_to_user_space(ecx); + if (err) + tdx_test_fatal(err); + + err = tdx_test_report_to_user_space(edx); + if (err) + tdx_test_fatal(err); + + tdx_test_success(); +} + +void verify_td_cpuid_tdcall(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + uint32_t eax, ebx, ecx, edx; + const struct kvm_cpuid_entry2 *cpuid_entry; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_code_cpuid_tdcall); + td_finalize(vm); + + printf("Verifying TD CPUID TDVMCALL:\n"); + + /* Wait for guest to report CPUID values */ + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + eax = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + ebx = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + ecx = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_TEST_REPORT_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + edx = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_SUCCESS(vcpu); + + /* Get KVM CPUIDs for reference */ + cpuid_entry = kvm_get_supported_cpuid_entry(1); + TEST_ASSERT(cpuid_entry, "CPUID entry missing\n"); + + ASSERT_EQ(cpuid_entry->eax, eax); + // Mask lapic ID when comparing ebx. + ASSERT_EQ(cpuid_entry->ebx & ~0xFF000000, ebx & ~0xFF000000); + ASSERT_EQ(cpuid_entry->ecx, ecx); + ASSERT_EQ(cpuid_entry->edx, edx); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { setbuf(stdout, NULL); @@ -997,6 +1090,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_guest_hlt); run_in_new_process(&verify_mmio_reads); run_in_new_process(&verify_mmio_writes); + run_in_new_process(&verify_td_cpuid_tdcall); return 0; }