| Message ID | 20231019154020.99080-11-dwmw2@infradead.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Get Xen PV shim running in Qemu, add net & console | expand |
On 19/10/2023 16:40, David Woodhouse wrote: > From: David Woodhouse <dwmw@amazon.co.uk> > > This is kind of redundant since without being able to get these through > some 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@amazon.co.uk> > --- > hw/i386/kvm/xen_xenstore.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > Reviewed-by: Paul Durrant <paul@xen.org>
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c index ef8aaa4c42..61692d4489 100644 --- a/hw/i386/kvm/xen_xenstore.c +++ b/hw/i386/kvm/xen_xenstore.c @@ -1434,6 +1434,7 @@ static void alloc_guest_port(XenXenstoreState *s) int xen_xenstore_reset(void) { XenXenstoreState *s = xen_xenstore_singleton; + GList *perms; int err; if (!s) { @@ -1461,6 +1462,16 @@ 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/port", "%u", s->guest_port); + relpath_printf(s, perms, "store/ring-ref", "%lu", + XEN_SPECIAL_PFN(XENSTORE)); + + 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