diff options
| author | Juan Quintela <quintela@redhat.com> | 2010-09-02 14:53:56 +0100 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-10-22 21:25:45 +0100 |
| commit | b37a56d6f3c0595d8d65ddd5b7610d11735c4978 (patch) | |
| tree | bfd7ddea47b7d8b086c67d3ac91e1ac999690a10 /drivers/xen/xenbus | |
| parent | 801fd14a725ef7757d33f07b83415cdd2165e50a (diff) | |
xen: Initialize xenbus for dom0.
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@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/xenbus')
| -rw-r--r-- | 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 d409495876f1..d242610597c0 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -801,6 +801,7 @@ device_initcall(xenbus_probe_initcall); static int __init xenbus_init(void) { int err = 0; + unsigned long page = 0; DPRINTK(""); @@ -821,7 +822,31 @@ 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; @@ -867,6 +892,8 @@ static int __init xenbus_init(void) bus_unregister(&xenbus_frontend.bus); out_error: + if (page != 0) + free_page(page); return err; } |