Add PV-GRUB

This fetches GRUB1 sources, applies the {graphical, print function,
save default, and ext3_256byte} patches from debian, and applies a
patch to make it work on x86_64 and port it to Mini-OS.  By using
libxc, PV-GRUB can then "kexec" the loaded kernel from inside the
domain itself, hence permitting to avoid the security-concerned
pygrub.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/extras/mini-os/fbfront.c b/extras/mini-os/fbfront.c
index 6517cdf4b5..245ef468ed 100644
--- a/extras/mini-os/fbfront.c
+++ b/extras/mini-os/fbfront.c
@@ -229,9 +229,18 @@ void shutdown_kbdfront(struct kbdfront_dev *dev)
     err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 6);
     xenbus_wait_for_value(path, "6", &dev->events);
 
+    err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 1);
+    // does not work yet.
+    //xenbus_wait_for_value(path, "2", &dev->events);
+
     xenbus_unwatch_path(XBT_NIL, path);
 
-    err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 1);
+    snprintf(path, sizeof(path), "%s/page-ref", nodename);
+    xenbus_rm(XBT_NIL, path);
+    snprintf(path, sizeof(path), "%s/event-channel", nodename);
+    xenbus_rm(XBT_NIL, path);
+    snprintf(path, sizeof(path), "%s/request-abs-pointer", nodename);
+    xenbus_rm(XBT_NIL, path);
 
     free_kbdfront(dev);
 }
@@ -561,9 +570,20 @@ void shutdown_fbfront(struct fbfront_dev *dev)
     err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 6);
     xenbus_wait_for_value(path, "6", &dev->events);
 
+    err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 1);
+    // does not work yet
+    //xenbus_wait_for_value(path, "2", &dev->events);
+
     xenbus_unwatch_path(XBT_NIL, path);
 
-    err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 1);
+    snprintf(path, sizeof(path), "%s/page-ref", nodename);
+    xenbus_rm(XBT_NIL, path);
+    snprintf(path, sizeof(path), "%s/event-channel", nodename);
+    xenbus_rm(XBT_NIL, path);
+    snprintf(path, sizeof(path), "%s/protocol", nodename);
+    xenbus_rm(XBT_NIL, path);
+    snprintf(path, sizeof(path), "%s/feature-update", nodename);
+    xenbus_rm(XBT_NIL, path);
 
     unbind_evtchn(dev->evtchn);