From mboxrd@z Thu Jan 1 00:00:00 1970 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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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 autolearn=ham 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 509B6C4338F for ; Fri, 30 Jul 2021 22:05:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3AE0460F94 for ; Fri, 30 Jul 2021 22:05:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233028AbhG3WFI (ORCPT ); Fri, 30 Jul 2021 18:05:08 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:32585 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229709AbhG3WFH (ORCPT ); Fri, 30 Jul 2021 18:05:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1627682701; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=j/8ZgOgV9FABxcwPWKwd6pFZTEbb8PsS8jPvc0Wk6tg=; b=fbHcs5jva1KPzejhf47LlSW+Za7QPEydHHRqQeVcrQt301tqS6UHYDjDDctQ5yCyNIYM9k 2r6ZG8zcX1j+YqiyFn60XdeOqtvV0E8+UihbXNfMg4SAkw+ksnvAUO5YmU1kGHXgUqFr90 dKGq5E2bQOE9R0uDxL4Ka845tFdG7ZU= Received: from mail-qt1-f198.google.com (mail-qt1-f198.google.com [209.85.160.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-543-u1iXp_e4NwCWI_5JL64ATg-1; Fri, 30 Jul 2021 18:05:00 -0400 X-MC-Unique: u1iXp_e4NwCWI_5JL64ATg-1 Received: by mail-qt1-f198.google.com with SMTP id z16-20020ac87cb00000b029025bf786be09so974388qtv.20 for ; Fri, 30 Jul 2021 15:04:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=j/8ZgOgV9FABxcwPWKwd6pFZTEbb8PsS8jPvc0Wk6tg=; b=XcBvDpMuKjNTOKGgzbVMN07Q5nn9JW0NQm5YOk9TQ7NQaDybsBQizBFnvXX5vTXkCi XU7toaQQqYIAXGex/0wj3De96RB3aElNgzqHGF74xkB7/C0055ZtoyXtoCg+WOKNgopb I7G175kszViIssQGxq5SN/tmz0rGyy6TMD+M3fY/Eai4dIEJad3qpjslVZ3BO2g5jEv+ 2Rb8FL2XSVRE3aUnIkp4+pJRCglAI1Va6GF6hKbhCPlRMHpIUWLYwcRDM73uMC3W1XUV Zrhpp01LPEGNTUtJMIpZnqXYWMFMeNYRo2S7wq8Sj/emUU0EE8diR4tyNy4eCLTbbVDz FH5g== X-Gm-Message-State: AOAM530XHdkHNJFJI2XrIG2hanpj78dAeLKMY73QOZYJ6fNMy1IOyOyL YQMeA9M8OeiGPKYjtmN/OkTnjeiBYMLuFJrSoi048lYIpR4onA9VdnTgoSCVXlLkbWiaFZXmEL2 kSoSQXcGf+GKYbEAVZtYbgKy3zePMEDbqpUZb/Tt8rSRv5JfF85d1SWAuguYRxg== X-Received: by 2002:a05:6214:d6e:: with SMTP id 14mr5095106qvs.53.1627682698999; Fri, 30 Jul 2021 15:04:58 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxMTQNHX7PoV1dhRPzDF85NElhalv3f5AD26oUEYimWzW4mHcCPuq4K8RhKwVszC874lpIkBw== X-Received: by 2002:a05:6214:d6e:: with SMTP id 14mr5095079qvs.53.1627682698761; Fri, 30 Jul 2021 15:04:58 -0700 (PDT) Received: from t490s.. (bras-base-toroon474qw-grc-65-184-144-111-238.dsl.bell.ca. [184.144.111.238]) by smtp.gmail.com with ESMTPSA id l12sm1199651qtx.45.2021.07.30.15.04.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Jul 2021 15:04:58 -0700 (PDT) From: Peter Xu To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Vitaly Kuznetsov , Sean Christopherson , peterx@redhat.com, Maxim Levitsky , Paolo Bonzini Subject: [PATCH v3 1/7] KVM: Allow to have arch-specific per-vm debugfs files Date: Fri, 30 Jul 2021 18:04:49 -0400 Message-Id: <20210730220455.26054-2-peterx@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210730220455.26054-1-peterx@redhat.com> References: <20210730220455.26054-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Allow archs to create arch-specific nodes under kvm->debugfs_dentry directory besides the stats fields. The new interface kvm_arch_create_vm_debugfs() is defined but not yet used. It's called after kvm->debugfs_dentry is created, so it can be referenced directly in kvm_arch_create_vm_debugfs(). Arch should define their own versions when they want to create extra debugfs nodes. Signed-off-by: Peter Xu --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 20 +++++++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 9d6b4ad407b8..a3ec3271c4c8 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1067,6 +1067,7 @@ bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu); bool kvm_arch_dy_has_pending_interrupt(struct kvm_vcpu *vcpu); int kvm_arch_post_init_vm(struct kvm *kvm); void kvm_arch_pre_destroy_vm(struct kvm *kvm); +int kvm_arch_create_vm_debugfs(struct kvm *kvm); #ifndef __KVM_HAVE_ARCH_VM_ALLOC /* diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index a96cbe24c688..327f8fae80a5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -915,7 +915,7 @@ static int kvm_create_vm_debugfs(struct kvm *kvm, int fd) char dir_name[ITOA_MAX_LEN * 2]; struct kvm_stat_data *stat_data; const struct _kvm_stats_desc *pdesc; - int i; + int i, ret; int kvm_debugfs_num_entries = kvm_vm_stats_header.num_desc + kvm_vcpu_stats_header.num_desc; @@ -960,6 +960,13 @@ static int kvm_create_vm_debugfs(struct kvm *kvm, int fd) kvm->debugfs_dentry, stat_data, &stat_fops_per_vm); } + + ret = kvm_arch_create_vm_debugfs(kvm); + if (ret) { + kvm_destroy_vm_debugfs(kvm); + return i; + } + return 0; } @@ -980,6 +987,17 @@ void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm) { } +/* + * Called after per-vm debugfs created. When called kvm->debugfs_dentry should + * be setup already, so we can create arch-specific debugfs entries under it. + * Cleanup should be automatic done in kvm_destroy_vm_debugfs() recursively, so + * a per-arch destroy interface is not needed. + */ +int __weak kvm_arch_create_vm_debugfs(struct kvm *kvm) +{ + return 0; +} + static struct kvm *kvm_create_vm(unsigned long type) { struct kvm *kvm = kvm_arch_alloc_vm(); -- 2.31.1