From patchwork Tue Mar 10 17:49:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paul Durrant X-Patchwork-Id: 11430015 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 84BF792A for ; Tue, 10 Mar 2020 17:51:52 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 6985D21927 for ; Tue, 10 Mar 2020 17:51:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6985D21927 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jBj0i-0008S1-4l; Tue, 10 Mar 2020 17:49:44 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jBj0g-0008RY-SB for xen-devel@lists.xenproject.org; Tue, 10 Mar 2020 17:49:42 +0000 X-Inumbo-ID: 859d9eac-62f7-11ea-b34e-bc764e2007e4 Received: from smtp-fw-4101.amazon.com (unknown [72.21.198.25]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 859d9eac-62f7-11ea-b34e-bc764e2007e4; Tue, 10 Mar 2020 17:49:42 +0000 (UTC) IronPort-SDR: Ewdmq+jBdS+B15WwhRCq0Chu8i6osimEdbuOHOpcDSO/vNukae4TpwOO6LnKAVZYY43nDwpNkx 5g/iMiCHSvhA== X-IronPort-AV: E=Sophos;i="5.70,537,1574121600"; d="scan'208";a="20628547" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-2b-4ff6265a.us-west-2.amazon.com) ([10.43.8.6]) by smtp-border-fw-out-4101.iad4.amazon.com with ESMTP; 10 Mar 2020 17:49:42 +0000 Received: from EX13MTAUEA002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2b-4ff6265a.us-west-2.amazon.com (Postfix) with ESMTPS id BD10FA179B; Tue, 10 Mar 2020 17:49:40 +0000 (UTC) Received: from EX13D32EUB002.ant.amazon.com (10.43.166.114) by EX13MTAUEA002.ant.amazon.com (10.43.61.77) with Microsoft SMTP Server (TLS) id 15.0.1236.3; Tue, 10 Mar 2020 17:49:28 +0000 Received: from EX13MTAUEB002.ant.amazon.com (10.43.60.12) by EX13D32EUB002.ant.amazon.com (10.43.166.114) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 10 Mar 2020 17:49:27 +0000 Received: from u2f063a87eabd5f.cbg10.amazon.com (10.125.106.135) by mail-relay.amazon.com (10.43.60.234) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Tue, 10 Mar 2020 17:49:25 +0000 From: To: Date: Tue, 10 Mar 2020 17:49:15 +0000 Message-ID: <20200310174917.1514-4-paul@xen.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200310174917.1514-1-paul@xen.org> References: <20200310174917.1514-1-paul@xen.org> MIME-Version: 1.0 Precedence: Bulk Subject: [Xen-devel] [PATCH v6 3/5] x86 / ioreq: use a MEMF_no_refcount allocation for server pages... X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Wei Liu , Paul Durrant , Andrew Cooper , Paul Durrant , Jan Beulich , =?utf-8?q?Roger_Pau_Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" From: Paul Durrant ... now that it is safe to assign them. This avoids relying on libxl (or whatever toolstack is in use) setting max_pages up with sufficient 'slop' to allow all necessary ioreq server pages to be allocated. Signed-off-by: Paul Durrant Reviewed-by: Jan Beulich --- Cc: Andrew Cooper Cc: Wei Liu Cc: "Roger Pau Monné" v2: - New in v2 --- xen/arch/x86/hvm/ioreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/ioreq.c b/xen/arch/x86/hvm/ioreq.c index f8a5c81546..648ef9137f 100644 --- a/xen/arch/x86/hvm/ioreq.c +++ b/xen/arch/x86/hvm/ioreq.c @@ -375,7 +375,7 @@ static int hvm_alloc_ioreq_mfn(struct hvm_ioreq_server *s, bool buf) return 0; } - page = alloc_domheap_page(s->target, 0); + page = alloc_domheap_page(s->target, MEMF_no_refcount); if ( !page ) return -ENOMEM;