[Xen-devel] [PATCH 06 of 10] Make suspend hypercall return 1 when the domain has been resumed

[Brendan Cully <brendan@xxxxxxxxx>]

# HG changeset patch
# User Brendan Cully <brendan@xxxxxxxxx>
# Date 1166166342 28800
# Node ID dc4d3d58b1d24199101c782a2890b03bfb82fe28
# Parent  84b42490685d4cc9cf6aeea43bb4d90c31a20bc1
Make suspend hypercall return 1 when the domain has been resumed.

This patch writes 1 into EAX when the domain has been resumed,
alerting the guest domain that it needs to reconnect to its back
ends.

Signed-off-by: Brendan Cully <brendan@xxxxxxxxx>

diff -r 84b42490685d -r dc4d3d58b1d2 tools/libxc/xc_linux_restore.c
--- a/tools/libxc/xc_linux_restore.c    Thu Dec 14 23:05:42 2006 -0800
+++ b/tools/libxc/xc_linux_restore.c    Thu Dec 14 23:05:42 2006 -0800
@@ -690,6 +690,8 @@ int xc_linux_restore(int xc_handle, int 
         ERROR("Suspend record frame number is bad");
         goto out;
     }
+    /* HYPERVISOR_suspend returns 1 to let guest know it should reconnect */
+    ctxt.user_regs.eax = 1;
     ctxt.user_regs.edx = mfn = p2m[pfn];
     start_info = xc_map_foreign_range(
         xc_handle, dom, PAGE_SIZE, PROT_READ | PROT_WRITE, mfn);

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