[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 05/10] xen: Initialize xenbus for dom0.
From: Juan Quintela <quintela@xxxxxxxxxx> Do initial xenbus/xenstore setup in dom0. In dom0 we need to actually allocate the xenstore resources, rather than being given them from outside. [ Impact: initialize Xenbus ] Signed-off-by: Juan Quintela <quintela@xxxxxxxxxx> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> --- drivers/xen/xenbus/xenbus_probe.c | 29 ++++++++++++++++++++++++++++- 1 files changed, 28 insertions(+), 1 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 29bac51..df0049e 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -798,6 +798,7 @@ device_initcall(xenbus_probe_initcall); static int __init xenbus_init(void) { int err = 0; + unsigned long page = 0; DPRINTK(""); @@ -818,7 +819,31 @@ static int __init xenbus_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) + goto out_error; + + 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_error; + + BUG_ON(err); + xen_store_evtchn = xen_start_info->store_evtchn = + alloc_unbound.port; + + xen_store_interface = mfn_to_virt(xen_store_mfn); } else { if (xen_hvm_domain()) { uint64_t v = 0; @@ -864,6 +889,8 @@ static int __init xenbus_init(void) bus_unregister(&xenbus_frontend.bus); out_error: + if (page != 0) + free_page(page); return err; } -- 1.5.6.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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