From patchwork Tue May 19 23:26:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anchal Agarwal X-Patchwork-Id: 11558987 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 03A1314B7 for ; Tue, 19 May 2020 23:26:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BB03A20823 for ; Tue, 19 May 2020 23:26:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="K46XGdq+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB03A20823 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 02C4480025; Tue, 19 May 2020 19:26:38 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 00444900003; Tue, 19 May 2020 19:26:37 -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 E5B9E80025; Tue, 19 May 2020 19:26:37 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0057.hostedemail.com [216.40.44.57]) by kanga.kvack.org (Postfix) with ESMTP id CEBE3900003 for ; Tue, 19 May 2020 19:26:37 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 92D7E180AD815 for ; Tue, 19 May 2020 23:26:37 +0000 (UTC) X-FDA: 76835055234.03.dust59_7403e749cdb32 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,prvs=4015a1a96=anchalag@amazon.com,,RULES_HIT:30054:30064:30091,0,RBL:72.21.196.25:@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: dust59_7403e749cdb32 X-Filterd-Recvd-Size: 6981 Received: from smtp-fw-2101.amazon.com (smtp-fw-2101.amazon.com [72.21.196.25]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Tue, 19 May 2020 23:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1589930798; x=1621466798; h=date:from:to:subject:message-id:references:mime-version: in-reply-to; bh=+5sqW/9tRYGzDifQrxQJ7j+i6WgVO1jvWkTIJZXYHhc=; b=K46XGdq+bQjjsBSF58nOLshjyQJUeGKZesZ9jXdJfsN/covNZ3BRqVU/ tGtr/k9ujNTkUHmXPTzVco+WvZo0/HKbfy54uVrjU49o5CA54bJ8MVNWP rwysXkR544eRybIl/BESTHj2ng4qsUgqFYGKKqACW/qPKEdfAMH2a6b71 Q=; IronPort-SDR: mWw8AR8ej5ULAmO2NWPA9U3fjvDcfrEySiPbnKH0hbJ0nS6cPVOD41yjXFXqxCxYYtwfKRalTW k2MS/P3b7VvQ== X-IronPort-AV: E=Sophos;i="5.73,411,1583193600"; d="scan'208";a="31243916" Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-2a-538b0bfb.us-west-2.amazon.com) ([10.43.8.2]) by smtp-border-fw-out-2101.iad2.amazon.com with ESMTP; 19 May 2020 23:26:23 +0000 Received: from EX13MTAUWB001.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2a-538b0bfb.us-west-2.amazon.com (Postfix) with ESMTPS id CA0F8A1EEC; Tue, 19 May 2020 23:26:20 +0000 (UTC) Received: from EX13D01UWB002.ant.amazon.com (10.43.161.136) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 19 May 2020 23:26:15 +0000 Received: from EX13MTAUWB001.ant.amazon.com (10.43.161.207) by EX13d01UWB002.ant.amazon.com (10.43.161.136) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 19 May 2020 23:26:15 +0000 Received: from dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (172.22.96.68) by mail-relay.amazon.com (10.43.161.249) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 19 May 2020 23:26:15 +0000 Received: by dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (Postfix, from userid 4335130) id 5012E40712; Tue, 19 May 2020 23:26:15 +0000 (UTC) Date: Tue, 19 May 2020 23:26:15 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 04/12] x86/xen: add system core suspend and resume callbacks Message-ID: <79cf02631dc00e62ebf90410bfbbdb52fe7024cb.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: From: Munehisa Kamata Add Xen PVHVM specific system core callbacks for PM suspend and hibernation support. The callbacks suspend and resume Xen primitives,like shared_info, pvclock and grant table. Note that Xen suspend can handle them in a different manner, but system core callbacks are called from the context. So if the callbacks are called from Xen suspend context, return immediately. Signed-off-by: Agarwal Anchal Signed-off-by: Munehisa Kamata --- arch/x86/xen/enlighten_hvm.c | 1 + arch/x86/xen/suspend.c | 53 ++++++++++++++++++++++++++++++++++++ include/xen/xen-ops.h | 3 ++ 3 files changed, 57 insertions(+) diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c index 75b1ec7a0fcd..138e71786e03 100644 --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -204,6 +204,7 @@ static void __init xen_hvm_guest_init(void) if (xen_feature(XENFEAT_hvm_callback_vector)) xen_have_vector_callback = 1; + xen_setup_syscore_ops(); xen_hvm_smp_init(); WARN_ON(xen_cpuhp_setup(xen_cpu_up_prepare_hvm, xen_cpu_dead_hvm)); xen_unplug_emulated_devices(); diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c index 1d83152c761b..784c4484100b 100644 --- a/arch/x86/xen/suspend.c +++ b/arch/x86/xen/suspend.c @@ -2,17 +2,22 @@ #include #include #include +#include +#include #include #include +#include #include #include +#include #include #include #include #include #include +#include #include "xen-ops.h" #include "mmu.h" @@ -82,3 +87,51 @@ void xen_arch_suspend(void) on_each_cpu(xen_vcpu_notify_suspend, NULL, 1); } + +static int xen_syscore_suspend(void) +{ + struct xen_remove_from_physmap xrfp; + int ret; + + /* Xen suspend does similar stuffs in its own logic */ + if (xen_suspend_mode_is_xen_suspend()) + return 0; + + xrfp.domid = DOMID_SELF; + xrfp.gpfn = __pa(HYPERVISOR_shared_info) >> PAGE_SHIFT; + + ret = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, &xrfp); + if (!ret) + HYPERVISOR_shared_info = &xen_dummy_shared_info; + + return ret; +} + +static void xen_syscore_resume(void) +{ + /* Xen suspend does similar stuffs in its own logic */ + if (xen_suspend_mode_is_xen_suspend()) + return; + + /* No need to setup vcpu_info as it's already moved off */ + xen_hvm_map_shared_info(); + + pvclock_resume(); + + gnttab_resume(); +} + +/* + * These callbacks will be called with interrupts disabled and when having only + * one CPU online. + */ +static struct syscore_ops xen_hvm_syscore_ops = { + .suspend = xen_syscore_suspend, + .resume = xen_syscore_resume +}; + +void __init xen_setup_syscore_ops(void) +{ + if (xen_hvm_domain()) + register_syscore_ops(&xen_hvm_syscore_ops); +} diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index 4ffe031adfc7..89b1e88712d6 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -43,6 +43,9 @@ int xen_setup_shutdown_event(void); bool xen_suspend_mode_is_xen_suspend(void); bool xen_suspend_mode_is_pm_suspend(void); bool xen_suspend_mode_is_pm_hibernation(void); + +void xen_setup_syscore_ops(void); + extern unsigned long *xen_contiguous_bitmap; #if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)