From patchwork Tue Oct 22 01:58:49 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11203491 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 2ED51112B for ; Tue, 22 Oct 2019 02:02:20 +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 C89F8207FC for ; Tue, 22 Oct 2019 02:02:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cbdhLKVV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C89F8207FC 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=IwffpuQ4SKZRneSDB8UtmSGG47G0kxs63MS3XXpPdi8=; b=cbdhLKVVcU8faT IFHa2dJeFAoig7pA1AwMHooQo0xI3iAkBv+v6HB9L2QlCwk4h0R1L4eKuYnwiXSrsd+TvTfjAqhFu bOid+4IfzOPaks3SYOwvYG/efRUVnhcZAj2knDhe9hhT2+MjncYcpMPxL/SMk8/hoO+r1ag64E1J8 k8cmXAHkVYDpekQgTx58LVPGz6TuYBbZc5Qx8/+l45IPgC1/IbbKmNQ4xI1SRchNOzTuf1QthVlwx hR482rPXOKSNUHe+c+tuWCUslWOt8a3MELS0j15BoCxrNIAVpwzIMexRFuB6cvl1p1k+u3G4+iMxv t84YjAh3U0rIEv8xwBPQ==; 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 1iMjV4-0007Nl-IU; Tue, 22 Oct 2019 02:02:18 +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 1iMjSU-0003sH-SY for linux-arm-kernel@lists.infradead.org; Tue, 22 Oct 2019 01:59:41 +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 18:59:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,325,1566889200"; d="scan'208";a="196293778" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.41]) by fmsmga008.fm.intel.com with ESMTP; 21 Oct 2019 18:59:37 -0700 From: Sean Christopherson To: Marc Zyngier , James Hogan , Paul Mackerras , Christian Borntraeger , Janosch Frank , Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Subject: [PATCH 09/45] KVM: x86: Move allocation of pio_data page down a few lines Date: Mon, 21 Oct 2019 18:58:49 -0700 Message-Id: <20191022015925.31916-10-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_185939_000477_332034A6 X-CRM114-Status: GOOD ( 14.56 ) 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 Allocate the pio_data page after creating the MMU and local APIC so that all direct memory allocations are grouped together. This allows setting the return value to -ENOMEM prior to starting the allocations instead of setting it in the fail path for every allocation. The pio_data page is only consumed when KVM_RUN is invoked, i.e. moving its allocation has no real functional impact. Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 777a29b3c38b..b33ca472ff4f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -9338,18 +9338,11 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) else vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; - page = alloc_page(GFP_KERNEL | __GFP_ZERO); - if (!page) { - r = -ENOMEM; - goto fail; - } - vcpu->arch.pio_data = page_address(page); - kvm_set_tsc_khz(vcpu, max_tsc_khz); r = kvm_mmu_create(vcpu); if (r < 0) - goto fail_free_pio_data; + return r; if (irqchip_in_kernel(vcpu->kvm)) { vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu->kvm); @@ -9359,25 +9352,27 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) } else static_key_slow_inc(&kvm_no_apic_vcpu); + r = -ENOMEM; + + page = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!page) + goto fail_free_lapic; + vcpu->arch.pio_data = page_address(page); + vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, GFP_KERNEL_ACCOUNT); - if (!vcpu->arch.mce_banks) { - r = -ENOMEM; - goto fail_free_lapic; - } + if (!vcpu->arch.mce_banks) + goto fail_free_pio_data; vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, - GFP_KERNEL_ACCOUNT)) { - r = -ENOMEM; + GFP_KERNEL_ACCOUNT)) goto fail_free_mce_banks; - } vcpu->arch.user_fpu = kmem_cache_zalloc(x86_fpu_cache, GFP_KERNEL_ACCOUNT); if (!vcpu->arch.user_fpu) { pr_err("kvm: failed to allocate userspace's fpu\n"); - r = -ENOMEM; goto free_wbinvd_dirty_mask; } @@ -9385,7 +9380,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) GFP_KERNEL_ACCOUNT); if (!vcpu->arch.guest_fpu) { pr_err("kvm: failed to allocate vcpu's fpu\n"); - r = -ENOMEM; goto free_user_fpu; } fx_init(vcpu); @@ -9412,13 +9406,12 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); fail_free_mce_banks: kfree(vcpu->arch.mce_banks); +fail_free_pio_data: + free_page((unsigned long)vcpu->arch.pio_data); fail_free_lapic: kvm_free_lapic(vcpu); fail_mmu_destroy: kvm_mmu_destroy(vcpu); -fail_free_pio_data: - free_page((unsigned long)vcpu->arch.pio_data); -fail: return r; }