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 140E1C3B187 for ; Wed, 12 Feb 2020 22:32:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C2E83218AC for ; Wed, 12 Feb 2020 22:32:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="BD/VBWFg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C2E83218AC 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 704DE6B04A7; Wed, 12 Feb 2020 17:32:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6B4A96B04A9; Wed, 12 Feb 2020 17:32:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 57C7F6B04AA; Wed, 12 Feb 2020 17:32:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0136.hostedemail.com [216.40.44.136]) by kanga.kvack.org (Postfix) with ESMTP id 3AEEE6B04A7 for ; Wed, 12 Feb 2020 17:32:13 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id D7D0B180AD807 for ; Wed, 12 Feb 2020 22:32:12 +0000 (UTC) X-FDA: 76482924504.15.bath44_6a98266192f49 X-HE-Tag: bath44_6a98266192f49 X-Filterd-Recvd-Size: 4555 Received: from smtp-fw-6001.amazon.com (smtp-fw-6001.amazon.com [52.95.48.154]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Wed, 12 Feb 2020 22:32:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1581546732; x=1613082732; h=date:from:to:subject:message-id:mime-version; bh=ripc5+9/gE+qNPNBav/IIcm5ONNdq1mgToxmDX/jFW0=; b=BD/VBWFgh88GB7S74RQOCBRf77hdGKWMkusuYt9uZveDwI62KNBY0CYb ev9SonLhNh1xN8+DDV6iNaegEihEgyzsFRnSFESM3QFLyDbAu+Xd2vUF8 6XwQ/1x1DjIW1pHzYud8lI7U2aEGNDb6hfLjzCyl81RMJl5/nlLmL0u7e A=; IronPort-SDR: gWdTJ5PKnY7douCc4vbbNcXx94KDrgyfXSO+Z9w6LtPWXGYkzF7Gj3MVWjoq7H58a0vZhfHqJE 3M+L5XR+QY3g== X-IronPort-AV: E=Sophos;i="5.70,434,1574121600"; d="scan'208";a="17479331" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-2c-2225282c.us-west-2.amazon.com) ([10.43.8.6]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP; 12 Feb 2020 22:31:57 +0000 Received: from EX13MTAUEE002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2c-2225282c.us-west-2.amazon.com (Postfix) with ESMTPS id 09736A2725; Wed, 12 Feb 2020 22:31:55 +0000 (UTC) Received: from EX13D08UEE003.ant.amazon.com (10.43.62.118) by EX13MTAUEE002.ant.amazon.com (10.43.62.24) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Wed, 12 Feb 2020 22:31:35 +0000 Received: from EX13MTAUEA002.ant.amazon.com (10.43.61.77) by EX13D08UEE003.ant.amazon.com (10.43.62.118) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Wed, 12 Feb 2020 22:31:35 +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; Wed, 12 Feb 2020 22:31:35 +0000 Received: by dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (Postfix, from userid 4335130) id DBCC2400D1; Wed, 12 Feb 2020 22:31:34 +0000 (UTC) Date: Wed, 12 Feb 2020 22:31:34 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v3 03/12] x86/xen: Introduce new function to map HYPERVISOR_shared_info on Resume Message-ID: <20200212223134.GA3625@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 --- Changes since V2: None --- 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); -- 2.24.1.AMZN