From patchwork Thu Jun 17 04:41:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 12326497 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31B1AC49EBE for ; Thu, 17 Jun 2021 04:42:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 123D861245 for ; Thu, 17 Jun 2021 04:42:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230212AbhFQEoJ (ORCPT ); Thu, 17 Jun 2021 00:44:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230087AbhFQEoF (ORCPT ); Thu, 17 Jun 2021 00:44:05 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A4A0C0617AE for ; Wed, 16 Jun 2021 21:41:57 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id k5-20020a63ba050000b029021ab84617c0so2953692pgf.14 for ; Wed, 16 Jun 2021 21:41:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=IVPga6Etj5urTm9L0uBbPfV30N+/VRkOME9/wFzlj2w=; b=Rwt9cs0+nJsn2PLarZ+QV4RUF83+oq0TrC2BIL3ZKv6Swubitt8OleNC5xfeBQUC05 6uOrMf/YCphXnKO4w9cw/dDYnLSplruPfoWV7QL0PCgCo0YaZLr7GH7gXytTZ4VNRvHP ftwCrhZLF3be+WYK/8anGkmbjXY4kHrv1HvDQpCVdQFUqlxeiIlI/l82US6Auo6lYk76 beX2r4GPj0D34DvcNSYgi+2Z/yq2dahv7NYei2P7FEfPnWywrf2FHaLfUyP/dJeIdwo0 J2Sb/bH0SZgaE7AtSbjj/aaV0mhFDu9qn7mqDv24YV4YvAu2o8I/kXmRLuHV3hdxGV2M jCuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=IVPga6Etj5urTm9L0uBbPfV30N+/VRkOME9/wFzlj2w=; b=T2VMAULlPFuRE+v6GF2mxoHYP4Wm1UWXg920wWxJzKbljjEuxKS1pZMfygFOg0MJus Lmk1gRa2AtXHZOCntLhtGwTeogT1irV2gUjEmTIvmdSKYw51MuP5esA2Tp1qooAXysvh n7SOYHd4VGVqoGFh9tVFDOZmDTCb5VTz5bl6LzuYvTInGFAwQBA+QAMiIb1FrmKz3egb CVf1FeAtOU6tbYXTyJ5XgyHNMdFnsb+inbXyFyeclAaFvM/q46m5ykne+FBYW4t7R4Y0 GOZSG+Q1aoG0PIkty64tR0ou/ZbMjO9eJzLohhvBHDoZaV1y3sNIrWJUwXBQFoV9Keq/ Xi5g== X-Gm-Message-State: AOAM531AKkFzOKIgUFW7QHr7S5UkLGUxVp0H/l59+SbjWzYkr9Fl3Brc VBCZj9pTHvxs66x5ashRVcEXaAmAA0rq+do5GyTaydJYtPWUTOUJTEcB3D6Q3c9iCRKliksYEif 5+ray81Vj57io+Z+bRhdCrjQ/HrQx1j/2CqD7YuD2QinSFWEbRDmjub+0WYkeFpUWBWceuN8= X-Google-Smtp-Source: ABdhPJyvs2zs0bjeT81loK+gGqml4Kzi4Bkf94OW3j6vONsj9YxeP7OBuwzMBLJPWXXtUHNA+p37Gk9fyRnD2AtkhA== X-Received: from jgzg.c.googlers.com ([fda3:e722:ac3:10:7f:e700:c0a8:1acf]) (user=jingzhangos job=sendgmr) by 2002:a62:5c87:0:b029:2ed:cf:1f89 with SMTP id q129-20020a625c870000b02902ed00cf1f89mr3307705pfb.9.1623904916476; Wed, 16 Jun 2021 21:41:56 -0700 (PDT) Date: Thu, 17 Jun 2021 04:41:45 +0000 In-Reply-To: <20210617044146.2667540-1-jingzhangos@google.com> Message-Id: <20210617044146.2667540-5-jingzhangos@google.com> Mime-Version: 1.0 References: <20210617044146.2667540-1-jingzhangos@google.com> X-Mailer: git-send-email 2.32.0.272.g935e593368-goog Subject: [PATCH v10 4/5] KVM: selftests: Add selftest for KVM statistics data binary interface From: Jing Zhang To: KVM , KVMARM , LinuxMIPS , KVMPPC , LinuxS390 , Linuxkselftest , Paolo Bonzini , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Will Deacon , Huacai Chen , Aleksandar Markovic , Thomas Bogendoerfer , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Jim Mattson , Peter Shier , Oliver Upton , David Rientjes , Emanuele Giuseppe Esposito , David Matlack , Ricardo Koller , Krish Sadhukhan , Fuad Tabba Cc: Jing Zhang Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add selftest to check KVM stats descriptors validity. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Reviewed-by: Krish Sadhukhan Tested-by: Fuad Tabba #arm64 Signed-off-by: Jing Zhang --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 3 + .../testing/selftests/kvm/include/kvm_util.h | 3 + .../selftests/kvm/kvm_binary_stats_test.c | 225 ++++++++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 12 + 5 files changed, 244 insertions(+) create mode 100644 tools/testing/selftests/kvm/kvm_binary_stats_test.c diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index e0e14150744e..ebe81d67c738 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -46,3 +46,4 @@ /memslot_perf_test /set_memory_region_test /steal_time +/kvm_binary_stats_test diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 61e2accd080d..8e4eaf8cdc06 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -79,6 +79,7 @@ TEST_GEN_PROGS_x86_64 += memslot_modification_stress_test TEST_GEN_PROGS_x86_64 += memslot_perf_test TEST_GEN_PROGS_x86_64 += set_memory_region_test TEST_GEN_PROGS_x86_64 += steal_time +TEST_GEN_PROGS_x86_64 += kvm_binary_stats_test TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list-sve @@ -90,6 +91,7 @@ TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus TEST_GEN_PROGS_aarch64 += kvm_page_table_test TEST_GEN_PROGS_aarch64 += set_memory_region_test TEST_GEN_PROGS_aarch64 += steal_time +TEST_GEN_PROGS_aarch64 += kvm_binary_stats_test TEST_GEN_PROGS_s390x = s390x/memop TEST_GEN_PROGS_s390x += s390x/resets @@ -99,6 +101,7 @@ TEST_GEN_PROGS_s390x += dirty_log_test TEST_GEN_PROGS_s390x += kvm_create_max_vcpus TEST_GEN_PROGS_s390x += kvm_page_table_test TEST_GEN_PROGS_s390x += set_memory_region_test +TEST_GEN_PROGS_s390x += kvm_binary_stats_test TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M)) LIBKVM += $(LIBKVM_$(UNAME_M)) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 35739567189e..558b450f3d7c 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -391,4 +391,7 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc); #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \ __GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4)) +int vm_get_stats_fd(struct kvm_vm *vm); +int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid); + #endif /* SELFTEST_KVM_UTIL_H */ diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c new file mode 100644 index 000000000000..bb7c79d36705 --- /dev/null +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * kvm_binary_stats_test + * + * Copyright (C) 2021, Google LLC. + * + * Test the fd-based interface for KVM statistics. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include +#include +#include +#include +#include + +#include "test_util.h" + +#include "kvm_util.h" +#include "asm/kvm.h" +#include "linux/kvm.h" + +static void stats_test(int stats_fd) +{ + ssize_t ret; + int i; + size_t size_desc, size_data = 0; + struct kvm_stats_header *header; + struct kvm_stats_desc *stats_desc, *pdesc; + struct kvm_stats_data *stats_data; + size_t size_header = sizeof(*header) + KVM_STATS_ID_MAXLEN; + + /* Read kvm stats header */ + header = malloc(size_header); + TEST_ASSERT(header, "Allocate memory for stats header"); + + ret = read(stats_fd, header, size_header); + TEST_ASSERT(ret == size_header, "Read stats header"); + size_desc = sizeof(*stats_desc) + header->name_size; + + /* Check id string in header, that should start with "kvm" */ + TEST_ASSERT(!strncmp(header->id, "kvm", 3) && + strlen(header->id) < KVM_STATS_ID_MAXLEN, + "Invalid KVM stats type, id: %s", header->id); + + /* Sanity check for other fields in header */ + if (header->count == 0) { + printf("No KVM stats defined!"); + return; + } + /* Check overlap */ + TEST_ASSERT(header->desc_offset > 0 && header->data_offset > 0 + && header->desc_offset >= size_header + && header->data_offset >= size_header, + "Invalid offset fields in header"); + TEST_ASSERT(header->desc_offset > header->data_offset + || (header->desc_offset + size_desc * header->count <= + header->data_offset), + "Descriptor block is overlapped with data block"); + + /* Allocate memory for stats descriptors */ + stats_desc = calloc(header->count, size_desc); + TEST_ASSERT(stats_desc, "Allocate memory for stats descriptors"); + /* Read kvm stats descriptors */ + ret = pread(stats_fd, stats_desc, + size_desc * header->count, header->desc_offset); + TEST_ASSERT(ret == size_desc * header->count, + "Read KVM stats descriptors"); + + /* Sanity check for fields in descriptors */ + for (i = 0; i < header->count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + /* Check type,unit,base boundaries */ + TEST_ASSERT((pdesc->flags & KVM_STATS_TYPE_MASK) + <= KVM_STATS_TYPE_MAX, "Unknown KVM stats type"); + TEST_ASSERT((pdesc->flags & KVM_STATS_UNIT_MASK) + <= KVM_STATS_UNIT_MAX, "Unknown KVM stats unit"); + TEST_ASSERT((pdesc->flags & KVM_STATS_BASE_MASK) + <= KVM_STATS_BASE_MAX, "Unknown KVM stats base"); + /* Check exponent for stats unit + * Exponent for counter should be greater than or equal to 0 + * Exponent for unit bytes should be greater than or equal to 0 + * Exponent for unit seconds should be less than or equal to 0 + * Exponent for unit clock cycles should be greater than or + * equal to 0 + */ + switch (pdesc->flags & KVM_STATS_UNIT_MASK) { + case KVM_STATS_UNIT_NONE: + case KVM_STATS_UNIT_BYTES: + case KVM_STATS_UNIT_CYCLES: + TEST_ASSERT(pdesc->exponent >= 0, + "Unsupported KVM stats unit"); + break; + case KVM_STATS_UNIT_SECONDS: + TEST_ASSERT(pdesc->exponent <= 0, + "Unsupported KVM stats unit"); + break; + } + /* Check name string */ + TEST_ASSERT(strlen(pdesc->name) < header->name_size, + "KVM stats name(%s) too long", pdesc->name); + /* Check size field, which should not be zero */ + TEST_ASSERT(pdesc->size, "KVM descriptor(%s) with size of 0", + pdesc->name); + size_data += pdesc->size * sizeof(stats_data->value[0]); + } + /* Check overlap */ + TEST_ASSERT(header->data_offset >= header->desc_offset + || header->data_offset + size_data <= header->desc_offset, + "Data block is overlapped with Descriptor block"); + /* Check validity of all stats data size */ + TEST_ASSERT(size_data >= header->count * sizeof(stats_data->value[0]), + "Data size is not correct"); + /* Check stats offset */ + for (i = 0; i < header->count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + TEST_ASSERT(pdesc->offset < size_data, + "Invalid offset (%u) for stats: %s", + pdesc->offset, pdesc->name); + } + + /* Allocate memory for stats data */ + stats_data = malloc(size_data); + TEST_ASSERT(stats_data, "Allocate memory for stats data"); + /* Read kvm stats data as a bulk */ + ret = pread(stats_fd, stats_data, size_data, header->data_offset); + TEST_ASSERT(ret == size_data, "Read KVM stats data"); + /* Read kvm stats data one by one */ + size_data = 0; + for (i = 0; i < header->count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + ret = pread(stats_fd, stats_data, + pdesc->size * sizeof(stats_data->value[0]), + header->data_offset + size_data); + TEST_ASSERT(ret == pdesc->size * sizeof(stats_data->value[0]), + "Read data of KVM stats: %s", pdesc->name); + size_data += pdesc->size * sizeof(stats_data->value[0]); + } + + free(stats_data); + free(stats_desc); +} + + +static void vm_stats_test(struct kvm_vm *vm) +{ + int stats_fd; + + /* Get fd for VM stats */ + stats_fd = vm_get_stats_fd(vm); + TEST_ASSERT(stats_fd >= 0, "Get VM stats fd"); + + stats_test(stats_fd); + close(stats_fd); + TEST_ASSERT(fcntl(stats_fd, F_GETFD) == -1, "Stats fd not freed"); +} + +static void vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) +{ + int stats_fd; + + /* Get fd for VCPU stats */ + stats_fd = vcpu_get_stats_fd(vm, vcpu_id); + TEST_ASSERT(stats_fd >= 0, "Get VCPU stats fd"); + + stats_test(stats_fd); + close(stats_fd); + TEST_ASSERT(fcntl(stats_fd, F_GETFD) == -1, "Stats fd not freed"); +} + +#define DEFAULT_NUM_VM 4 +#define DEFAULT_NUM_VCPU 4 + +/* + * Usage: kvm_bin_form_stats [#vm] [#vcpu] + * The first parameter #vm set the number of VMs being created. + * The second parameter #vcpu set the number of VCPUs being created. + * By default, DEFAULT_NUM_VM VM and DEFAULT_NUM_VCPU VCPU for the VM would be + * created for testing. + */ + +int main(int argc, char *argv[]) +{ + int max_vm = DEFAULT_NUM_VM, max_vcpu = DEFAULT_NUM_VCPU, ret, i, j; + struct kvm_vm **vms; + + /* Get the number of VMs and VCPUs that would be created for testing. */ + if (argc > 1) { + max_vm = strtol(argv[1], NULL, 0); + if (max_vm <= 0) + max_vm = DEFAULT_NUM_VM; + } + if (argc > 2) { + max_vcpu = strtol(argv[2], NULL, 0); + if (max_vcpu <= 0) + max_vcpu = DEFAULT_NUM_VCPU; + } + + /* Check the extension for binary stats */ + ret = kvm_check_cap(KVM_CAP_BINARY_STATS_FD); + TEST_ASSERT(ret > 0, + "Binary form statistics interface is not supported"); + + /* Create VMs and VCPUs */ + vms = malloc(sizeof(vms[0]) * max_vm); + TEST_ASSERT(vms, "Allocate memory for storing VM pointers"); + for (i = 0; i < max_vm; ++i) { + vms[i] = vm_create(VM_MODE_DEFAULT, + DEFAULT_GUEST_PHY_PAGES, O_RDWR); + for (j = 0; j < max_vcpu; ++j) + vm_vcpu_add(vms[i], j); + } + + /* Check stats read for every VM and VCPU */ + for (i = 0; i < max_vm; ++i) { + vm_stats_test(vms[i]); + for (j = 0; j < max_vcpu; ++j) + vcpu_stats_test(vms[i], j); + } + + for (i = 0; i < max_vm; ++i) + kvm_vm_free(vms[i]); + free(vms); + return 0; +} diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 5c70596dd1b9..83c02cb0ae1e 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -2286,3 +2286,15 @@ unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size) n = DIV_ROUND_UP(size, vm_guest_mode_params[mode].page_size); return vm_adjust_num_guest_pages(mode, n); } + +int vm_get_stats_fd(struct kvm_vm *vm) +{ + return ioctl(vm->fd, KVM_GET_STATS_FD, NULL); +} + +int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid) +{ + struct vcpu *vcpu = vcpu_find(vm, vcpuid); + + return ioctl(vcpu->fd, KVM_GET_STATS_FD, NULL); +}