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=-8.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 B94AFC33C9E for ; Tue, 7 Jan 2020 23:40:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7B6A524681 for ; Tue, 7 Jan 2020 23:40:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="QdZ0BpYC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B6A524681 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 188028E0007; Tue, 7 Jan 2020 18:40:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 138408E0001; Tue, 7 Jan 2020 18:40:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 027688E0007; Tue, 7 Jan 2020 18:40:21 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0073.hostedemail.com [216.40.44.73]) by kanga.kvack.org (Postfix) with ESMTP id E26FD8E0001 for ; Tue, 7 Jan 2020 18:40:21 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 94E375DCE for ; Tue, 7 Jan 2020 23:40:21 +0000 (UTC) X-FDA: 76352459442.30.sheet86_3d47a1339083f X-HE-Tag: sheet86_3d47a1339083f X-Filterd-Recvd-Size: 4561 Received: from smtp-fw-9102.amazon.com (smtp-fw-9102.amazon.com [207.171.184.29]) by imf14.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Jan 2020 23:40:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1578440422; x=1609976422; h=date:from:to:cc:subject:message-id:mime-version; bh=fKBHoK09YZBwiKXNN6RfSgjFeH+5bNsX0xukKXYpamw=; b=QdZ0BpYCCt7ZIjK5yDkKyZBeMcfEzuQt8Mt95iA9qeLkMZVChllte7L5 aBI7XmxfgbXbhI1i7ixC4CdrhIIrrCWrefVK1LzAnpxukyTrTFFbPhLro yJccHvkMx2zoKSQ9vAVfEBQdcgCW2K/aX1FBRK/m8ooqWr6/cJ24fRKjK Y=; IronPort-SDR: +5WXZR3aQI5IaNTfkU7fCO+qrdocNvSC8Btqi8thp07FiCmMP6fRqrvnOSUa1k56Gzc7llX4Wq QvHj7bPazjDg== X-IronPort-AV: E=Sophos;i="5.69,407,1571702400"; d="scan'208";a="17325704" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2b-a7fdc47a.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 07 Jan 2020 23:40:10 +0000 Received: from EX13MTAUEB002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan2.pdx.amazon.com [10.170.41.162]) by email-inbound-relay-2b-a7fdc47a.us-west-2.amazon.com (Postfix) with ESMTPS id E3EF9C2E0A; Tue, 7 Jan 2020 23:40:07 +0000 (UTC) Received: from EX13D08UEB003.ant.amazon.com (10.43.60.11) by EX13MTAUEB002.ant.amazon.com (10.43.60.12) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 7 Jan 2020 23:39:47 +0000 Received: from EX13MTAUEA002.ant.amazon.com (10.43.61.77) by EX13D08UEB003.ant.amazon.com (10.43.60.11) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 7 Jan 2020 23:39:47 +0000 Received: from dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (172.22.96.68) by mail-relay.amazon.com (10.43.61.169) with Microsoft SMTP Server id 15.0.1236.3 via Frontend Transport; Tue, 7 Jan 2020 23:39:47 +0000 Received: by dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (Postfix, from userid 4335130) id E3FD440E65; Tue, 7 Jan 2020 23:39:46 +0000 (UTC) Date: Tue, 7 Jan 2020 23:39:46 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [RFC PATCH V2 03/11] x86/xen: Introduce new function to map Message-ID: <20200107233946.GA18143@dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Introduce a small function which re-uses shared page's PA allocated during guest initialization time in reserve_shared_info() and not allocate new page during resume flow. It also does the mapping of shared_info_page by calling xen_hvm_init_shared_info() to use the function. Signed-off-by: Anchal Agarwal --- arch/x86/xen/enlighten_hvm.c | 7 +++++++ arch/x86/xen/xen-ops.h | 1 + 2 files changed, 8 insertions(+) diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c index e138f7de52d2..75b1ec7a0fcd 100644 --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -27,6 +27,13 @@ static unsigned long shared_info_pfn; +void xen_hvm_map_shared_info(void) +{ + xen_hvm_init_shared_info(); + if (shared_info_pfn) + HYPERVISOR_shared_info = __va(PFN_PHYS(shared_info_pfn)); +} + void xen_hvm_init_shared_info(void) { struct xen_add_to_physmap xatp; diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 45a441c33d6d..d84c357994bd 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -56,6 +56,7 @@ void xen_enable_syscall(void); void xen_vcpu_restore(void); void xen_callback_vector(void); +void xen_hvm_map_shared_info(void); void xen_hvm_init_shared_info(void); void xen_unplug_emulated_devices(void); -- 2.15.3.AMZN