From patchwork Thu Jun 3 21:14:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 454387 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 444CCC47096 for ; Thu, 3 Jun 2021 21:15:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BA89613F6 for ; Thu, 3 Jun 2021 21:15:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230172AbhFCVRd (ORCPT ); Thu, 3 Jun 2021 17:17:33 -0400 Received: from mail-yb1-f201.google.com ([209.85.219.201]:52089 "EHLO mail-yb1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230083AbhFCVRc (ORCPT ); Thu, 3 Jun 2021 17:17:32 -0400 Received: by mail-yb1-f201.google.com with SMTP id d6-20020a2568060000b0290535b52251cfso8993895ybc.18 for ; Thu, 03 Jun 2021 14:15:37 -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=RQfw/+XX+rRGzzoKUUXS7FvasOKRxalsaSvhmIlWcm4=; b=N026WALQwOdnYn3d8XDhx/mBm5Cmn8Zb6l2xp2XYXtl0p04rJK2cKwBvkR9ioBKy1H 3D8YSOYWdX5jeTMw5KCIwMIi1TByh7CT+s46cFVRsXW0neiRN5FbBbQB1e9u4NNBFq8I HLAZkeaqT0rY0QuLVnIOdqwiRdNjMa3QNXb1vm0F68oc16AdU7HvXDrtHcMj8yOV2xoe aFHb9iqmI9KwmBBkzZmkkQphtvF9NBky6dc5AP1cfD5enwH8pNNwHzfCVzeOvn2ce8uh Y5MrEmD2oyUheASfysn8vf3ENS4+pFgsQZG3aGZ7HCuPSgdqPya7UDnroFx2Cza3hCHX 1NJg== 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=RQfw/+XX+rRGzzoKUUXS7FvasOKRxalsaSvhmIlWcm4=; b=FDGNXNI0a4thjJJjSRs4pYseDObtKzSNTiw8mMgGJuSMA6+6OdCAUyR+HCisSrso3g cKvnl0C9iCQVdtbzqdPyvt1EH7E5iEKL6esndju6Xklk5T1n2DpAxaUJlJ0dbtkh0F++ nJKmsr4rnGyx2Gb6jbhWYjTO4lxTscavxETfA0ckwuNbfj2wphQSycPxQTcj6mczBNji h4gnSFd+xBfsbbnAO8KWhqJWVAhzF/fbO9jE4ma/c7L45Qw26NXNgb+AbrP0Z1BnTLE+ 7np/rQjpbKwWSiFkiBb+FoUbDk+IMSOzJnv50s923oQQtb0L9rtkndb0j3978bXokq0h PJ7Q== X-Gm-Message-State: AOAM533A9zt2K2g1QMa7eb+ctGWyb4kC6NXGFFVvpL3OCgjjDz7R87ww CsjpLqaKn9DkxAAeQhgJfoxGmwlX3/REg+DblQ== X-Google-Smtp-Source: ABdhPJwD9dQ3KT/TwvL5vNu/S4Tg0PNVroan413gkqa8lTQ/BT9gphOEqOY+zMMw7no8pccs2g97e7ND9h0oKiGIjg== X-Received: from jgzg.c.googlers.com ([fda3:e722:ac3:10:7f:e700:c0a8:1acf]) (user=jingzhangos job=sendgmr) by 2002:a25:d6c8:: with SMTP id n191mr702161ybg.358.1622754877533; Thu, 03 Jun 2021 14:14:37 -0700 (PDT) Date: Thu, 3 Jun 2021 21:14:26 +0000 In-Reply-To: <20210603211426.790093-1-jingzhangos@google.com> Message-Id: <20210603211426.790093-5-jingzhangos@google.com> Mime-Version: 1.0 References: <20210603211426.790093-1-jingzhangos@google.com> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog Subject: [PATCH v7 4/4] 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 Cc: Jing Zhang Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add selftest to check KVM stats descriptors validity. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Signed-off-by: Jing Zhang Reviewed-by: Krish Sadhukhan --- 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 | 215 ++++++++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 12 + 5 files changed, 234 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 bd83158e0e0b..d1c3ee7d3e41 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -43,3 +43,4 @@ /memslot_modification_stress_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 e439d027939d..0cd46d6d1e15 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -76,6 +76,7 @@ TEST_GEN_PROGS_x86_64 += kvm_page_table_test TEST_GEN_PROGS_x86_64 += memslot_modification_stress_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 @@ -87,6 +88,7 @@ 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 @@ -96,6 +98,7 @@ 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 a8f022794ce3..96d15da3d72e 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -387,4 +387,7 @@ 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..081983110dc5 --- /dev/null +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c @@ -0,0 +1,215 @@ +// 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" + +void stats_test(int stats_fd, int size_stat) +{ + ssize_t ret; + int i; + size_t size_desc, size_data = 0; + struct kvm_stats_header header; + struct kvm_stats_desc *stats_desc, *pdesc; + void *stats_data; + + /* Read kvm stats header */ + ret = read(stats_fd, &header, sizeof(header)); + TEST_ASSERT(ret == sizeof(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"); + + /* 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 >= sizeof(header) + && header.data_offset >= sizeof(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 * size_stat; + } + /* 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 * size_stat, + "Data size is not correct"); + + /* 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 * size_stat, + header.data_offset + size_data); + TEST_ASSERT(ret == pdesc->size * size_stat, + "Read data of KVM stats: %s", pdesc->name); + size_data += pdesc->size * size_stat; + } + + free(stats_data); + free(stats_desc); +} + + +void vm_stats_test(struct kvm_vm *vm) +{ + int stats_fd; + struct kvm_vm_stats_data *stats_data; + + /* 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, sizeof(stats_data->value[0])); + close(stats_fd); + TEST_ASSERT(fcntl(stats_fd, F_GETFD) == -1, "Stats fd not freed"); +} + +void vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) +{ + int stats_fd; + struct kvm_vcpu_stats_data *stats_data; + + /* 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, sizeof(stats_data->value[0])); + 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_STATS_BINARY_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 fc83f6c5902d..10385b76fe11 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -2090,3 +2090,15 @@ 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); +}