From patchwork Mon Mar 6 19:01:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Matlack X-Patchwork-Id: 13162208 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 C607BC6FD20 for ; Mon, 6 Mar 2023 19:02:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229985AbjCFTC3 (ORCPT ); Mon, 6 Mar 2023 14:02:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229926AbjCFTC0 (ORCPT ); Mon, 6 Mar 2023 14:02:26 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5002E4A1C0 for ; Mon, 6 Mar 2023 11:02:05 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id x64-20020a25ce43000000b00ae6d5855d78so11536469ybe.12 for ; Mon, 06 Mar 2023 11:02:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1678129324; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=XCoFR/ZEz+o/3af75F9xOrPS2psj7bAuPaV+hSWOgQo=; b=UtpACFkTBCbOuRJEDO4GIV5VZyNtvBXfzND3oU3x+MTJtqKf4RC+aJ4iEUgKvk/Gbv QwvfJnU9JToxEfS+WRcwSwlVT4IlfuPHxbDlaSiueIsWANa2Ta9bs7g2Xb/SoaztXvbW AcZzwTzgMy8MObXk877NToyNHzCNVG6tPs8bD3L2lDLtP1vJbpQNVe/QUw4MOneGcben A12+mWFZoMCKAD0Z64Pf8fB/rO0lgxgHvfoLNCDEimxkEwLixX3fA9CtbPgaW1lHLH/k mZfeAEacPOyAvkjV/89Ze4YmYA+t2BabNvI12wvTJZnOvTvidyImSKerp51EgZ1O07yo W1MA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678129324; 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=XCoFR/ZEz+o/3af75F9xOrPS2psj7bAuPaV+hSWOgQo=; b=hbgfurpwI1LcjnmYvxvJ1JFfmNBxDOdzJeJk1GQQYG/FgYWEsxNnJdlWmE8V6+ba4k Ky39lCZ5lVSkbN4nxTHdz6j7lSMbqwk9E22qJoSXPnLv9LKEy0/7+C5M10ZOtexBo1WG ahXMb03LI/qBFpw52JDnKZdaon7jX6tRNomNIyKYtw4ltuJstJ6oVKsMjD8MrlSaP9u2 ZNJ2E5L+O9lxnZAx0x8IioJbx+zOHQSSpKa2c3A/LDoHo6OO06Hv21K92e99/eGVxFQz RB44xZkDzW8KBD5mBi1nTSb6uGz6haMBq9+mWkXu9UcSXMYiO2OC/Hcd+Nl0YJfTie9V KX+w== X-Gm-Message-State: AO0yUKVmuyYqMjbK+pDt5QThv6Dp25qP8GV+tXfdOut6JePzsXhKNCUY rnd6r/5WVrML/1l665OrflMIxKCC01rzcA== X-Google-Smtp-Source: AK7set//cZ5G8Yg9tzyC35+cBUfG5YD+QOMFZSqm+c6ivqgffhDJvoZQbaLGDxeXrS7rdZX3Y2pHJ1bn0bJjqg== X-Received: from dmatlack-n2d-128.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1309]) (user=dmatlack job=sendgmr) by 2002:a81:ac4b:0:b0:533:9ffb:cb12 with SMTP id z11-20020a81ac4b000000b005339ffbcb12mr7643877ywj.10.1678129324575; Mon, 06 Mar 2023 11:02:04 -0800 (PST) Date: Mon, 6 Mar 2023 11:01:55 -0800 In-Reply-To: <20230306190156.434452-1-dmatlack@google.com> Mime-Version: 1.0 References: <20230306190156.434452-1-dmatlack@google.com> X-Mailer: git-send-email 2.40.0.rc0.216.gc4246ad0f0-goog Message-ID: <20230306190156.434452-4-dmatlack@google.com> Subject: [PATCH v2 3/4] KVM: Allow custom names for KVM_STAT() From: David Matlack To: Paolo Bonzini Cc: Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Zenghui Yu , Huacai Chen , Aleksandar Markovic , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Sean Christopherson , Michael Ellerman , Eric Farman , " =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= " , David Matlack , Sathvika Vasireddy , Nicholas Piggin , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, Jing Zhang Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Allow custom names to be specified for stats built on KVM_STAT() via a new inner macro __KVM_STAT(). e.g. KVM_STAT(VM, CUMULATIVE, NONE, foo), __KVM_STAT(VM, CUMULATIVE, NONE, bar, "custom_name"), ... Custom name support enables decoupling the userspace-visible stat names from their internal representation in C. This can allow future commits to refactor the various stats structs without impacting userspace tools that read KVM stats. This also allows stats to be stored in data structures such as arrays, without needing unions to access specific stats. For example, the union for pages_{4k,2m,1g} is no longer necessary. At Google, we have several other out-of-tree stats that would benefit from this support. No functional change intended. Link: https://lore.kernel.org/all/20211019000459.3163029-1-jingzhangos@google.com/ Suggested-by: Jing Zhang Signed-off-by: David Matlack --- include/linux/kvm_host.h | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6673ae757c4e..fa026e8997b2 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1761,40 +1761,43 @@ struct _kvm_stats_desc { .name = _name, \ } -#define VM_GENERIC_STATS_DESC(_stat, _type, _unit, _base, _exponent, _size, \ - _bucket_size) \ - _KVM_STATS_DESC(struct kvm_vm_stat, generic._stat, #_stat, _type, \ +#define VM_GENERIC_STATS_DESC(_stat, _name, _type, _unit, _base, _exponent, \ + _size, _bucket_size) \ + _KVM_STATS_DESC(struct kvm_vm_stat, generic._stat, _name, _type, \ _unit, _base, _exponent, _size, _bucket_size) -#define VCPU_GENERIC_STATS_DESC(_stat, _type, _unit, _base, _exponent, _size, \ - _bucket_size) \ - _KVM_STATS_DESC(struct kvm_vcpu_stat, generic._stat, #_stat, _type, \ +#define VCPU_GENERIC_STATS_DESC(_stat, _name, _type, _unit, _base, _exponent, \ + _size, _bucket_size) \ + _KVM_STATS_DESC(struct kvm_vcpu_stat, generic._stat, _name, _type, \ _unit, _base, _exponent, _size, _bucket_size) -#define VM_STATS_DESC(_stat, _type, _unit, _base, _exponent, _size, \ +#define VM_STATS_DESC(_stat, _name, _type, _unit, _base, _exponent, _size, \ _bucket_size) \ - _KVM_STATS_DESC(struct kvm_vm_stat, _stat, #_stat, _type, _unit, \ + _KVM_STATS_DESC(struct kvm_vm_stat, _stat, _name, _type, _unit, \ _base, _exponent, _size, _bucket_size) -#define VCPU_STATS_DESC(_stat, _type, _unit, _base, _exponent, _size, \ +#define VCPU_STATS_DESC(_stat, _name, _type, _unit, _base, _exponent, _size, \ _bucket_size) \ - _KVM_STATS_DESC(struct kvm_vcpu_stat, _stat, #_stat, _type, _unit, \ + _KVM_STATS_DESC(struct kvm_vcpu_stat, _stat, _name, _type, _unit, \ _base, _exponent, _size, _bucket_size) /* SCOPE: VM, VM_GENERIC, VCPU, VCPU_GENERIC */ -#define STATS_DESC(SCOPE, stat, type, unit, base, exp, sz, bsz) \ - SCOPE##_STATS_DESC(stat, type, unit, base, exp, sz, bsz) +#define STATS_DESC(SCOPE, stat, name, type, unit, base, exp, sz, bsz) \ + SCOPE##_STATS_DESC(stat, name, type, unit, base, exp, sz, bsz) -#define KVM_STAT(SCOPE, TYPE, UNIT, _stat) \ - STATS_DESC(SCOPE, _stat, KVM_STATS_TYPE_##TYPE, \ +#define __KVM_STAT(SCOPE, TYPE, UNIT, _stat, _name) \ + STATS_DESC(SCOPE, _stat, _name, KVM_STATS_TYPE_##TYPE, \ KVM_STATS_UNIT_##UNIT, KVM_STATS_BASE_POW10, 0, 1, 0) +#define KVM_STAT(SCOPE, TYPE, UNIT, _stat) \ + __KVM_STAT(SCOPE, TYPE, UNIT, _stat, #_stat) + #define KVM_STAT_NSEC(SCOPE, _stat) \ - STATS_DESC(SCOPE, _stat, KVM_STATS_TYPE_CUMULATIVE, \ + STATS_DESC(SCOPE, _stat, #_stat, KVM_STATS_TYPE_CUMULATIVE, \ KVM_STATS_UNIT_SECONDS, KVM_STATS_BASE_POW10, -9, 1, 0) #define KVM_HIST_NSEC(SCOPE, TYPE, _stat, _size, _bucket_size) \ - STATS_DESC(VCPU_GENERIC, _stat, KVM_STATS_TYPE_##TYPE##_HIST, \ + STATS_DESC(VCPU_GENERIC, _stat, #_stat, KVM_STATS_TYPE_##TYPE##_HIST, \ KVM_STATS_UNIT_SECONDS, KVM_STATS_BASE_POW10, -9, \ _size, _bucket_size)