From patchwork Mon Oct 31 18:00:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Matlack X-Patchwork-Id: 13026200 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 E367BFA3741 for ; Mon, 31 Oct 2022 18:01:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229956AbiJaSBS (ORCPT ); Mon, 31 Oct 2022 14:01:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229992AbiJaSBM (ORCPT ); Mon, 31 Oct 2022 14:01:12 -0400 Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32A7B13DE9 for ; Mon, 31 Oct 2022 11:01:08 -0700 (PDT) Received: by mail-pf1-x44a.google.com with SMTP id bw25-20020a056a00409900b0056bdd4f8818so6051527pfb.15 for ; Mon, 31 Oct 2022 11:01:08 -0700 (PDT) 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=9T+DYSzhKuAW5tnRCXGXrMAstKaJApTg9bZvi/cvnBo=; b=qsaIxiFDsOglF9Hk0ta90m/QM33zJVwn00XeSRyjkYXfoK4BiFr1wNS2W71+i9zNyX K69xwONicSjSgYLVFHgK3rbEBZ9FFFp+VzQaTiG1pRH83Vm+qMRxVRWyzvdFGlD8WNMN iZyUVbqH/MOT102y9s+3qF5L8lqTLI+Y1NFeUlGACP7rDR3hC0RnvEuRkO79XwWkL5lZ 73K8sXnc1Dvra6CBtl0l7wFbN/J97R/x3adb+a9dWeILklhCPUDAaSmVQUnbf7qoxNmC sf63iLUkvvyug6UfdOvoZ0t8mHIX/axK4nO3IEKZARHyZzxcXd5cDBV4MBI0/11BhfOj dghQ== 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=9T+DYSzhKuAW5tnRCXGXrMAstKaJApTg9bZvi/cvnBo=; b=Uc5bSgVmBzGyEVyj8rMILPUibRZ5NLL0zcZpAkWaU4ozVIR3/ZLWtvc24J/GL1dsE5 MCF1P7y8JInzNuxGDgk5iJYg6AWSF0mfqZRiDDKsVehoVzGAe2nc5MYKfjBL9FIPZtwq u/vmDTHMRs7G/0hyksmgGyCHCFImJ8WCqOhnro9UgZifE4eMJoTbp43cy7VeiOTDbU7u BwBvTf9vVDepAdJxi9o2OHa6I6p7Ya7nmzahavi9oYI/a3WG7VhREJK+xMnw6mFDmtyx x3uN5OivJcKADblWdnaqh4OD5IiJdOGDtxXVVKxvDT5HjBvMC3x2NgEd9P6c7ftoJRsq U7XQ== X-Gm-Message-State: ACrzQf3UxCTdGTW/ic6R8+AETjmA3Wwo0yrh54QvW2DvC+XQv+dGAmmz cBsXTsRZjmWNr5p8IXirrS7Iw42MKuUBpg== X-Google-Smtp-Source: AMsMyM4UJcYmvu9wjnwgT6xsXHzm5az60L7+I+nacdJ2K9l02XSJW7+dcdSOvbcJ/p9rm9luneI2x61SDD0W9A== X-Received: from dmatlack-n2d-128.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1309]) (user=dmatlack job=sendgmr) by 2002:a17:90b:1081:b0:20a:fee1:8f69 with SMTP id gj1-20020a17090b108100b0020afee18f69mr682052pjb.0.1667239267351; Mon, 31 Oct 2022 11:01:07 -0700 (PDT) Date: Mon, 31 Oct 2022 11:00:45 -0700 In-Reply-To: <20221031180045.3581757-1-dmatlack@google.com> Mime-Version: 1.0 References: <20221031180045.3581757-1-dmatlack@google.com> X-Mailer: git-send-email 2.38.1.273.g43a17bfeac-goog Message-ID: <20221031180045.3581757-11-dmatlack@google.com> Subject: [PATCH v3 10/10] KVM: selftests: Add a test for KVM_CAP_EXIT_ON_EMULATION_FAILURE From: David Matlack To: Paolo Bonzini Cc: Sean Christopherson , David Matlack , Peter Xu , Jim Mattson , Yang Zhong , Wei Wang , Colton Lewis , Vitaly Kuznetsov , Vipin Sharma , Aaron Lewis , kvm@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a selftest to exercise the KVM_CAP_EXIT_ON_EMULATION_FAILURE capability. This capability is also exercised through smaller_maxphyaddr_emulation_test, but that test requires allow_smaller_maxphyaddr=Y, which is off by default on Intel when ept=Y and unconditionally disabled on AMD when npt=Y. This new test ensures we exercise KVM_CAP_EXIT_ON_EMULATION_FAILURE independent of allow_smaller_maxphyaddr. Signed-off-by: David Matlack --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../x86_64/exit_on_emulation_failure_test.c | 42 +++++++++++++++++++ 3 files changed, 44 insertions(+) create mode 100644 tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index 053e5d34cd03..bef984e4c39d 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -17,6 +17,7 @@ /x86_64/cr4_cpuid_sync_test /x86_64/debug_regs /x86_64/evmcs_test +/x86_64/exit_on_emulation_failure_test /x86_64/fix_hypercall_test /x86_64/get_msr_index_features /x86_64/kvm_clock_test diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index ab133b731a2d..11a6104e6547 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -81,6 +81,7 @@ TEST_GEN_PROGS_x86_64 = x86_64/cpuid_test TEST_GEN_PROGS_x86_64 += x86_64/cr4_cpuid_sync_test TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test +TEST_GEN_PROGS_x86_64 += x86_64/exit_on_emulation_failure_test TEST_GEN_PROGS_x86_64 += x86_64/fix_hypercall_test TEST_GEN_PROGS_x86_64 += x86_64/hyperv_clock TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c new file mode 100644 index 000000000000..8e98ad3259de --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2022, Google LLC. + * + * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ + +#include "flds_emulation.h" + +#include "test_util.h" + +#define MMIO_GPA 0x700000000 +#define MMIO_GVA MMIO_GPA + +static void guest_code(void) +{ + /* Execute flds with an MMIO address to force KVM to emulate it. */ + flds(MMIO_GVA); +} + +int main(int argc, char *argv[]) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + /* Tell stdout not to buffer its content */ + setbuf(stdout, NULL); + + TEST_REQUIRE(kvm_has_cap(KVM_CAP_EXIT_ON_EMULATION_FAILURE)); + + vm = vm_create_with_one_vcpu(&vcpu, guest_code); + vm_enable_cap(vm, KVM_CAP_EXIT_ON_EMULATION_FAILURE, 1); + virt_map(vm, MMIO_GVA, MMIO_GPA, 1); + + vcpu_run(vcpu); + assert_exit_for_flds_emulation_failure(vcpu); + + kvm_vm_free(vm); + return 0; +}