From patchwork Thu Mar 3 03:54:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reiji Watanabe X-Patchwork-Id: 12767004 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 205D0C433EF for ; Thu, 3 Mar 2022 03:57:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:References: Mime-Version:Message-Id:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=kRuoWzB+87guRIpYUCreZ3U4cHNVcLO2zkw5NQTzC/k=; b=U4c9pRRdNvhtnkRBRguDZIf4QX wI12oO21cLaspBwb5i9jCIZ7L1vq+Fhl33Y2UitBOEAdtAOGlkhkq+tSFmErmgx95YV2JKaJblKgr aMwogLJ1fMDhMK24P3qEStcf4r/DAfDyr6pgg6EojjJM6RH8FPgFwmN+mKnU9+i0zcQZP4s/BVIQa XMiyogzl6/RWfZ6+9how9h7GlDLWEfYMW12FcDpfZvyLqi03yhCMp2YOstE9GXKNGpzgAjbguqvBG 7cn4xM8EYfS5YloIQrJMHassPulRRexOP56uSFcP0H7ByQ0d4fg0nYc6HKqR6BqUuqedLWeL2+3gR 5KQc8c1w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nPcZo-005884-S1; Thu, 03 Mar 2022 03:56:29 +0000 Received: from mail-pl1-x64a.google.com ([2607:f8b0:4864:20::64a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nPcZk-00586f-Go for linux-arm-kernel@lists.infradead.org; Thu, 03 Mar 2022 03:56:26 +0000 Received: by mail-pl1-x64a.google.com with SMTP id d14-20020a170902654e00b001518cc774d3so2152669pln.2 for ; Wed, 02 Mar 2022 19:56:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=NckzY4aHIyiZXsaClAwfWp/pDb1JmWqk+qjn0+sOUoI=; b=VW1g/aLap7Cx412U6MVCmQ3huTTCGQIsKF+5EhVu8PSpIXmzOtImfHebUE3SNnu1mG fKzBzvc/D5fFVMAQZC5cJwDANguFabZD9m0VZn3nDb3SkhFQRx3ywQkbS1D49Q9Y/Wm+ QI1Src4SiGKfxBcOUtZZUpuLnXUrE5WKonM52u9TyvUpWItBv2gaj3Kc84R6gm7REmku JqYjYvATpVM5MiRVbj1op9a141FocnG4UbL3XIZFhAptEjKTeEOlMQJb9j0GTlgQQ4VT aISjFD4PKqsSwepPxKw17QTGDpaq1pna70ZldBznas6RSZcJK12P6lyhkNDoD9+Z/MyB R3ew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=NckzY4aHIyiZXsaClAwfWp/pDb1JmWqk+qjn0+sOUoI=; b=OGZV8Q6yejufDKWs+HBNU8u5CytqZNnS5J5jwjMrK6WJHW4FH9G7YRZqN6mc5E/MCD ymdHXBmkW2eTiMEcP2iDqGMtbmefN+TF2DaFXmWMwsq+vzdOWeTVPHChYhJqnXELcDh1 LvMin+CkFxIWkrKR9ZNQhq9bG06QxU6H/kds6MZGKIOKHWoKqG49V8GNpu1LRD7Ev5z2 fhtxbhCe0WP8GRAAuGhTsVn7JsRwHps1TTBJXOf3lxgrMMtQ73d9q+wkaFWtbmBTd6iW 14OzuYQhOe0cSfMr1tyms196azsnUa66rGv8BVALerlOBN+SofFZKHa/VX3GCxaJBsB5 glDg== X-Gm-Message-State: AOAM531mga/g9RL7ltxw3T/l4MZaclMM3BXEkZmPdOqVz2MFJiNCMWTw CHQT7PPBOoutg2Z6/cpxaa9gs5f0oww= X-Google-Smtp-Source: ABdhPJwGkqx1HAK+FV7iAAHRTN1diZQ3YkCi5pD9Jjog5yTbQqCGb2a6Lajv7Zk8gguxjYp3GH6tcJVztQw= X-Received: from reiji-vws-sp.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3d59]) (user=reijiw job=sendgmr) by 2002:a05:6a00:1d8a:b0:4e1:559d:2f62 with SMTP id z10-20020a056a001d8a00b004e1559d2f62mr36600999pfw.26.1646279783056; Wed, 02 Mar 2022 19:56:23 -0800 (PST) Date: Wed, 2 Mar 2022 19:54:08 -0800 In-Reply-To: <20220303035408.3708241-1-reijiw@google.com> Message-Id: <20220303035408.3708241-3-reijiw@google.com> Mime-Version: 1.0 References: <20220303035408.3708241-1-reijiw@google.com> X-Mailer: git-send-email 2.35.1.574.g5d30c73bfb-goog Subject: [PATCH v3 3/3] KVM: arm64: selftests: Introduce vcpu_width_config From: Reiji Watanabe To: Marc Zyngier , kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, James Morse , Alexandru Elisei , Suzuki K Poulose , Paolo Bonzini , Will Deacon , Andrew Jones , Peng Liang , Peter Shier , Ricardo Koller , Oliver Upton , Jing Zhang , Raghavendra Rao Anata , Reiji Watanabe X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220302_195624_590940_8C3A33B8 X-CRM114-Status: GOOD ( 20.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce a test for aarch64 that ensures non-mixed-width vCPUs (all 64bit vCPUs or all 32bit vcPUs) can be configured, and mixed-width vCPUs cannot be configured. Reviewed-by: Andrew Jones Signed-off-by: Reiji Watanabe --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/aarch64/vcpu_width_config.c | 125 ++++++++++++++++++ 3 files changed, 127 insertions(+) create mode 100644 tools/testing/selftests/kvm/aarch64/vcpu_width_config.c diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index dce7de7755e6..4e884e29b2a8 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -3,6 +3,7 @@ /aarch64/debug-exceptions /aarch64/get-reg-list /aarch64/psci_cpu_on_test +/aarch64/vcpu_width_config /aarch64/vgic_init /aarch64/vgic_irq /s390x/memop diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 17c3f0749f05..3482586c6e33 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -103,6 +103,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/arch_timer TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list TEST_GEN_PROGS_aarch64 += aarch64/psci_cpu_on_test +TEST_GEN_PROGS_aarch64 += aarch64/vcpu_width_config TEST_GEN_PROGS_aarch64 += aarch64/vgic_init TEST_GEN_PROGS_aarch64 += aarch64/vgic_irq TEST_GEN_PROGS_aarch64 += demand_paging_test diff --git a/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c b/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c new file mode 100644 index 000000000000..6e6e6a9f69e3 --- /dev/null +++ b/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * vcpu_width_config - Test KVM_ARM_VCPU_INIT() with KVM_ARM_VCPU_EL1_32BIT. + * + * Copyright (c) 2022 Google LLC. + * + * This is a test that ensures that non-mixed-width vCPUs (all 64bit vCPUs + * or all 32bit vcPUs) can be configured and mixed-width vCPUs cannot be + * configured. + */ + +#define _GNU_SOURCE + +#include "kvm_util.h" +#include "processor.h" +#include "test_util.h" + + +/* + * Add a vCPU, run KVM_ARM_VCPU_INIT with @init1, and then + * add another vCPU, and run KVM_ARM_VCPU_INIT with @init2. + */ +static int add_init_2vcpus(struct kvm_vcpu_init *init1, + struct kvm_vcpu_init *init2) +{ + struct kvm_vm *vm; + int ret; + + vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); + + vm_vcpu_add(vm, 0); + ret = _vcpu_ioctl(vm, 0, KVM_ARM_VCPU_INIT, init1); + if (ret) + goto free_exit; + + vm_vcpu_add(vm, 1); + ret = _vcpu_ioctl(vm, 1, KVM_ARM_VCPU_INIT, init2); + +free_exit: + kvm_vm_free(vm); + return ret; +} + +/* + * Add two vCPUs, then run KVM_ARM_VCPU_INIT for one vCPU with @init1, + * and run KVM_ARM_VCPU_INIT for another vCPU with @init2. + */ +static int add_2vcpus_init_2vcpus(struct kvm_vcpu_init *init1, + struct kvm_vcpu_init *init2) +{ + struct kvm_vm *vm; + int ret; + + vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); + + vm_vcpu_add(vm, 0); + vm_vcpu_add(vm, 1); + + ret = _vcpu_ioctl(vm, 0, KVM_ARM_VCPU_INIT, init1); + if (ret) + goto free_exit; + + ret = _vcpu_ioctl(vm, 1, KVM_ARM_VCPU_INIT, init2); + +free_exit: + kvm_vm_free(vm); + return ret; +} + +/* + * Tests that two 64bit vCPUs can be configured, two 32bit vCPUs can be + * configured, and two mixed-witgh vCPUs cannot be configured. + * Each of those three cases, configure vCPUs in two different orders. + * The one is running KVM_CREATE_VCPU for 2 vCPUs, and then running + * KVM_ARM_VCPU_INIT for them. + * The other is running KVM_CREATE_VCPU and KVM_ARM_VCPU_INIT for a vCPU, + * and then run those commands for another vCPU. + */ +int main(void) +{ + struct kvm_vcpu_init init1, init2; + struct kvm_vm *vm; + int ret; + + if (kvm_check_cap(KVM_CAP_ARM_EL1_32BIT) <= 0) { + print_skip("KVM_CAP_ARM_EL1_32BIT is not supported"); + exit(KSFT_SKIP); + } + + /* Get the preferred target type and copy that to init2 */ + vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); + vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init1); + kvm_vm_free(vm); + memcpy(&init2, &init1, sizeof(init2)); + + /* Test with 64bit vCPUs */ + ret = add_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret == 0, + "Configuring 64bit EL1 vCPUs failed unexpectedly"); + ret = add_2vcpus_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret == 0, + "Configuring 64bit EL1 vCPUs failed unexpectedly"); + + /* Test with 32bit vCPUs */ + init1.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); + init2.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); + ret = add_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret == 0, + "Configuring 32bit EL1 vCPUs failed unexpectedly"); + ret = add_2vcpus_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret == 0, + "Configuring 32bit EL1 vCPUs failed unexpectedly"); + + /* Test with mixed-width vCPUs */ + init1.features[0] = 0; + init2.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); + ret = add_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret != 0, + "Configuring mixed-width vCPUs worked unexpectedly"); + ret = add_2vcpus_init_2vcpus(&init1, &init2); + TEST_ASSERT(ret != 0, + "Configuring mixed-width vCPUs worked unexpectedly"); + + return 0; +}