From patchwork Tue May 19 23:25:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anchal Agarwal X-Patchwork-Id: 11558985 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 5205814B7 for ; Tue, 19 May 2020 23:26:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 148B12087D for ; Tue, 19 May 2020 23:26:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="YN4W3aE4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 148B12087D 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 583C680024; Tue, 19 May 2020 19:26:21 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 55A89900003; Tue, 19 May 2020 19:26:21 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4708D80024; Tue, 19 May 2020 19:26:21 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0074.hostedemail.com [216.40.44.74]) by kanga.kvack.org (Postfix) with ESMTP id 2C0D4900003 for ; Tue, 19 May 2020 19:26:21 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D389D40C0 for ; Tue, 19 May 2020 23:26:20 +0000 (UTC) X-FDA: 76835054520.17.base15_71916deb3bf29 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,prvs=4015a1a96=anchalag@amazon.com,,RULES_HIT:30054:30064,0,RBL:207.171.184.25:@amazon.com:.lbl8.mailshell.net-62.18.0.100 66.10.201.10,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: base15_71916deb3bf29 X-Filterd-Recvd-Size: 4659 Received: from smtp-fw-9101.amazon.com (smtp-fw-9101.amazon.com [207.171.184.25]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Tue, 19 May 2020 23:26:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1589930781; x=1621466781; h=date:from:to:subject:message-id:references:mime-version: in-reply-to; bh=SCTjmV5xVHiNIjiUIMGTdFjC64fXGAUedyZ2c0jICro=; b=YN4W3aE48j3JIbgEGppaT+iZ0KXHnLcqQ+bZFkRuS1fwHAAIfpWYFvkZ 1zzs4BjzWANlTenUCUfZT/56K53816w8dBGm13TaFAcI4b9/X/VSHp13A y9OVumcyhI7mb4JmMSeZHk77hv4XCvd9j1e5R0fV/lc5MWVqEM6hN3yJq 4=; IronPort-SDR: Kg+TLt+LY+bqUJUwBpjU3RbEzJfqG2xPZmKQMMNfSWm/LI+Yb1NN+YBg1sA0a/PiOEnBmgV9Bu QFRUnvjW9CbQ== X-IronPort-AV: E=Sophos;i="5.73,411,1583193600"; d="scan'208";a="36215719" Received: from sea32-co-svc-lb4-vlan2.sea.corp.amazon.com (HELO email-inbound-relay-1e-17c49630.us-east-1.amazon.com) ([10.47.23.34]) by smtp-border-fw-out-9101.sea19.amazon.com with ESMTP; 19 May 2020 23:26:16 +0000 Received: from EX13MTAUWC001.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan3.iad.amazon.com [10.40.159.166]) by email-inbound-relay-1e-17c49630.us-east-1.amazon.com (Postfix) with ESMTPS id 61936A2313; Tue, 19 May 2020 23:26:09 +0000 (UTC) Received: from EX13D05UWC003.ant.amazon.com (10.43.162.226) by EX13MTAUWC001.ant.amazon.com (10.43.162.135) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 19 May 2020 23:25:48 +0000 Received: from EX13MTAUWC001.ant.amazon.com (10.43.162.135) by EX13D05UWC003.ant.amazon.com (10.43.162.226) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 19 May 2020 23:25:48 +0000 Received: from dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (172.22.96.68) by mail-relay.amazon.com (10.43.162.232) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 19 May 2020 23:25:48 +0000 Received: by dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (Postfix, from userid 4335130) id 91F2940712; Tue, 19 May 2020 23:25:48 +0000 (UTC) Date: Tue, 19 May 2020 23:25:48 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 03/12] x86/xen: Introduce new function to map HYPERVISOR_shared_info on Resume Message-ID: <529f544a64bb93b920bf86b1d3f86d93b0a4219b.1589926004.git.anchalag@amazon.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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);