From patchwork Tue Jan 7 23:40:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anchal Agarwal X-Patchwork-Id: 11322369 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 5E6E4138C for ; Tue, 7 Jan 2020 23:42:26 +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 375592075A for ; Tue, 7 Jan 2020 23:42:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="SF4dCTB8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 375592075A Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.com 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 1ioyTE-0001rE-Jt; Tue, 07 Jan 2020 23:41:08 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ioyTD-0001r6-DK for xen-devel@lists.xenproject.org; Tue, 07 Jan 2020 23:41:07 +0000 X-Inumbo-ID: 28030c9a-31a7-11ea-bf56-bc764e2007e4 Received: from smtp-fw-6001.amazon.com (unknown [52.95.48.154]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 28030c9a-31a7-11ea-bf56-bc764e2007e4; Tue, 07 Jan 2020 23:40:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1578440459; x=1609976459; h=date:from:to:cc:subject:message-id:mime-version; bh=R/ChRdUub8GaU9C55T2reGXH2khOUkoMgXccaQMjyI4=; b=SF4dCTB8IsKeN/VdRKwCZ3QjbKruP0lWSOXIsBf2ZozAVK2AARa+Pveu Vrd7F2XP+lmaVx5OcJrulV7lrcLvYL1thiRQAfyMVDo/UGJhyAIwjVaWk ZiSYeLuRyyxOhjySYbx2pZTYMLOy/ja5Z3f553cqIL2CTRFik0hLL0srP g=; IronPort-SDR: 5g/iqkzFvYugBmDKt0Glzcp1Q3t/ykf/uYOlIE5v/VAcV7ggyE/V7zO/wgrTEjPikfKPNIr6jw N16mKYQ8zZGw== X-IronPort-AV: E=Sophos;i="5.69,407,1571702400"; d="scan'208";a="11930671" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-2a-6e2fc477.us-west-2.amazon.com) ([10.43.8.6]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP; 07 Jan 2020 23:40:57 +0000 Received: from EX13MTAUEB002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan2.pdx.amazon.com [10.170.41.162]) by email-inbound-relay-2a-6e2fc477.us-west-2.amazon.com (Postfix) with ESMTPS id 1A4B4A1EE3; Tue, 7 Jan 2020 23:40:55 +0000 (UTC) Received: from EX13D08UEB002.ant.amazon.com (10.43.60.107) by EX13MTAUEB002.ant.amazon.com (10.43.60.12) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 7 Jan 2020 23:40:39 +0000 Received: from EX13MTAUEB002.ant.amazon.com (10.43.60.12) by EX13D08UEB002.ant.amazon.com (10.43.60.107) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 7 Jan 2020 23:40:38 +0000 Received: from dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (172.22.96.68) by mail-relay.amazon.com (10.43.60.234) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Tue, 7 Jan 2020 23:40:38 +0000 Received: by dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com (Postfix, from userid 4335130) id 4B11640E65; Tue, 7 Jan 2020 23:40:38 +0000 (UTC) Date: Tue, 7 Jan 2020 23:40:38 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Message-ID: <20200107234038.GA18296@dev-dsk-anchalag-2a-9c2d1d96.us-west-2.amazon.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: Bulk Subject: [Xen-devel] [RFC PATCH V2 04/11] x86/xen: add system core suspend and resume callbacks 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: anchalag@amazon.com Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" 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 6c36e161dfd1..3b3992b5b0c2 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)