From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760710AbZCWSLb (ORCPT ); Mon, 23 Mar 2009 14:11:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759545AbZCWSKK (ORCPT ); Mon, 23 Mar 2009 14:10:10 -0400 Received: from adsl-69-107-72-54.dsl.pltn13.pacbell.net ([69.107.72.54]:60836 "EHLO abulafia.goop.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1760442AbZCWSKE (ORCPT ); Mon, 23 Mar 2009 14:10:04 -0400 From: Jeremy Fitzhardinge To: "H. Peter Anvin" Cc: the arch/x86 maintainers , Ingo Molnar , Linux Kernel Mailing List , Xen-devel , Juan Quintela , Jeremy Fitzhardinge Subject: [PATCH 02/15] xen dom0: Initialize xenbus for dom0. Date: Mon, 23 Mar 2009 11:09:46 -0700 Message-Id: <1237831799-6568-3-git-send-email-jeremy@goop.org> X-Mailer: git-send-email 1.6.0.6 In-Reply-To: <49C45238.7050007@zytor.com> References: <49C45238.7050007@zytor.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Juan Quintela Impact: initialize Xenbus Do initial xenbus/xenstore setup in dom0. In dom0 we need to actually allocate the xenstore resources, rather than being given them from outside. Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Juan Quintela --- drivers/xen/xenbus/xenbus_probe.c | 30 +++++++++++++++++++++++++++++- 1 files changed, 29 insertions(+), 1 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 773d1cf..38aaec3 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -821,6 +821,7 @@ void xenbus_probe(struct work_struct *unused) static int __init xenbus_probe_init(void) { int err = 0; + unsigned long page = 0; DPRINTK(""); @@ -841,7 +842,31 @@ static int __init xenbus_probe_init(void) * Domain0 doesn't have a store_evtchn or store_mfn yet. */ if (xen_initial_domain()) { - /* dom0 not yet supported */ + struct evtchn_alloc_unbound alloc_unbound; + + /* Allocate Xenstore page */ + page = get_zeroed_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + + xen_store_mfn = xen_start_info->store_mfn = + pfn_to_mfn(virt_to_phys((void *)page) >> + PAGE_SHIFT); + + /* Next allocate a local port which xenstored can bind to */ + alloc_unbound.dom = DOMID_SELF; + alloc_unbound.remote_dom = 0; + + err = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound, + &alloc_unbound); + if (err == -ENOSYS) + goto out_unreg_front; + + BUG_ON(err); + xen_store_evtchn = xen_start_info->store_evtchn = + alloc_unbound.port; + + xen_store_interface = mfn_to_virt(xen_store_mfn); } else { xenstored_ready = 1; xen_store_evtchn = xen_start_info->store_evtchn; @@ -877,6 +902,9 @@ static int __init xenbus_probe_init(void) bus_unregister(&xenbus_frontend.bus); out_error: + if (page != 0) + free_page(page); + return err; } -- 1.6.0.6