From: David Woodhouse <dwmw@xxxxxxxxxxxx> This is kind of redundant since without being able to get these through ome other method (HVMOP_get_param) the guest wouldn't be able to access XenStore in order to find them. But Xen populates them, and it does allow guests to *rebind* to the event channel port after a reset. Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx> --- hw/i386/kvm/xen_xenstore.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c index d2b311109b..3300e0614a 100644 --- a/hw/i386/kvm/xen_xenstore.c +++ b/hw/i386/kvm/xen_xenstore.c @@ -1432,6 +1432,7 @@ static void alloc_guest_port(XenXenstoreState *s) int xen_xenstore_reset(void) { XenXenstoreState *s = xen_xenstore_singleton; + GList *perms; int err; if (!s) { @@ -1459,6 +1460,15 @@ int xen_xenstore_reset(void) } s->be_port = err; + /* Create frontend store nodes */ + perms = g_list_append(NULL, xs_perm_as_string(XS_PERM_NONE, DOMID_QEMU)); + perms = g_list_append(perms, xs_perm_as_string(XS_PERM_READ, xen_domid)); + + relpath_printf(s, perms, "store/ring-ref", "%lu", XEN_SPECIAL_PFN(XENSTORE)); + relpath_printf(s, perms, "store/port", "%u", s->be_port); + + g_list_free_full(perms, g_free); + /* * We don't actually access the guest's page through the grant, because * this isn't real Xen, and we can just use the page we gave it in the -- 2.40.1