From patchwork Tue Oct 22 01:59:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11203651 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0BBBE14E5 for ; Tue, 22 Oct 2019 02:12:30 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D57202086D for ; Tue, 22 Oct 2019 02:12:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="emewea9b" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D57202086D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HN/Kd4hOonqguC0OrmSxwSX7iCAQlFGQPMRW/vPKuzc=; b=emewea9b3Wpfqt MS7qDuHZ7VxiVEtKQRiS8wE/kOYAos0qE5DvpTQQDFbi8x4TouwAFbAeGgG5ugGpRzV89BkjxeUGm HJtS50GUUWjRQ9d/3NuKVPi4OCxg1mVFcCnOQNEFL/RI1IZL2Kk2RKvkPYQdr4zw+MlwuNPWjryIw EixdT/OFQbbyUkWRwerln9Bg3fqKJ5gm88a7j0twvqPpP66O7a5MUreS+etPJqIM82kFj+m68+GVP 3jJHtjX1jOxw6ixTzoGyw7u9yKf30UzNfygyP9TTZw/fgoN2SJn1qP8lYBpsBjULsaV/7/WTyINCO FWEdRgxRArNu0o73tYEA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMjet-0002UP-Lg; Tue, 22 Oct 2019 02:12:27 +0000 Received: from mga07.intel.com ([134.134.136.100]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMjT7-0003sH-TQ for linux-arm-kernel@lists.infradead.org; Tue, 22 Oct 2019 02:00:20 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Oct 2019 19:00:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,325,1566889200"; d="scan'208";a="196294026" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.41]) by fmsmga008.fm.intel.com with ESMTP; 21 Oct 2019 19:00:04 -0700 From: Sean Christopherson To: Marc Zyngier , James Hogan , Paul Mackerras , Christian Borntraeger , Janosch Frank , Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Subject: [PATCH 45/45] KVM: Move vcpu->run page allocation out of kvm_vcpu_init() Date: Mon, 21 Oct 2019 18:59:25 -0700 Message-Id: <20191022015925.31916-46-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20191022015925.31916-1-sean.j.christopherson@intel.com> References: <20191022015925.31916-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191021_190018_051238_F630BEB5 X-CRM114-Status: GOOD ( 14.06 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [134.134.136.100 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm-ppc@vger.kernel.org, Wanpeng Li , kvm@vger.kernel.org, David Hildenbrand , Joerg Roedel , Cornelia Huck , linux-mips@vger.kernel.org, Sean Christopherson , linux-kernel@vger.kernel.org, James Morse , linux-arm-kernel@lists.infradead.org, Vitaly Kuznetsov , Suzuki K Poulose , kvmarm@lists.cs.columbia.edu, Julien Thierry , Jim Mattson Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Open code the allocation and freeing of the vcpu->run page in kvm_vm_ioctl_create_vcpu() and kvm_vcpu_destroy() respectively. Doing so allows kvm_vcpu_init() to be a pure init function and eliminates kvm_vcpu_uninit() entirely. Signed-off-by: Sean Christopherson --- virt/kvm/kvm_main.c | 34 +++++++++++++--------------------- 1 file changed, 13 insertions(+), 21 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index c079b22032fa..e532c6e606c0 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -287,10 +287,8 @@ void kvm_reload_remote_mmus(struct kvm *kvm) kvm_make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); } -static int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) +static void kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) { - struct page *page; - mutex_init(&vcpu->mutex); vcpu->cpu = -1; vcpu->kvm = kvm; @@ -302,23 +300,11 @@ static int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) vcpu->pre_pcpu = -1; INIT_LIST_HEAD(&vcpu->blocked_vcpu_list); - page = alloc_page(GFP_KERNEL | __GFP_ZERO); - if (!page) - return -ENOMEM; - vcpu->run = page_address(page); - kvm_vcpu_set_in_spin_loop(vcpu, false); kvm_vcpu_set_dy_eligible(vcpu, false); vcpu->preempted = false; vcpu->ready = false; preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); - - return 0; -} - -static void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) -{ - free_page((unsigned long)vcpu->run); } void kvm_vcpu_destroy(struct kvm_vcpu *vcpu) @@ -332,7 +318,7 @@ void kvm_vcpu_destroy(struct kvm_vcpu *vcpu) */ put_pid(rcu_dereference_protected(vcpu->pid, 1)); - kvm_vcpu_uninit(vcpu); + free_page((unsigned long)vcpu->run); kmem_cache_free(kvm_vcpu_cache, vcpu); } EXPORT_SYMBOL_GPL(kvm_vcpu_destroy); @@ -2636,6 +2622,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) { int r; struct kvm_vcpu *vcpu; + struct page *page; if (id >= KVM_MAX_VCPU_ID) return -EINVAL; @@ -2659,13 +2646,18 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) goto vcpu_decrement; } - r = kvm_vcpu_init(vcpu, kvm, id); - if (r) + page = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!page) { + r = -ENOMEM; goto vcpu_free; + } + vcpu->run = page_address(page); + + kvm_vcpu_init(vcpu, kvm, id); r = kvm_arch_vcpu_create(vcpu); if (r) - goto vcpu_uninit; + goto vcpu_free_run_page; kvm_create_vcpu_debugfs(vcpu); @@ -2702,8 +2694,8 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) mutex_unlock(&kvm->lock); debugfs_remove_recursive(vcpu->debugfs_dentry); kvm_arch_vcpu_destroy(vcpu); -vcpu_uninit: - kvm_vcpu_uninit(vcpu); +vcpu_free_run_page: + free_page((unsigned long)vcpu->run); vcpu_free: kmem_cache_free(kvm_vcpu_cache, vcpu); vcpu_decrement: