Mailing List Archive

# HG changeset patch
# User smh22@firebug.cl.cam.ac.uk
# Node ID 393256b2ead0c883e2095479e1c66d2e34d18a10
# Parent c7508abc5b6b1aac2f8ee63fe56922f43c457cc3
Avoid GPF when attempting to save / restore 64bit guests. More thought
required as to best way to get M2P mfns under 64...

Signed-off-by: Steven Hand <steven@xensource.com>

diff -r c7508abc5b6b -r 393256b2ead0 linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c
--- a/linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c Tue Nov 22 17:44:08 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c Tue Nov 22 18:10:50 2005
@@ -222,6 +222,17 @@
unsigned long *p;
int i;

+#if defined (__x86_64__)
+ /*
+ ** XXX SMH: the below procedure won't work for 64 since
+ ** we don't have access to the memory which maps the M2P.
+ ** A proper fix will probably involve moving this
+ ** functionality to Xen - for now just return an error
+ ** here rather than GPF'ing in the kernel.
+ */
+ ret = -EINVAL;
+ break;
+#endif
if (copy_from_user(&m, (void *)data, sizeof(m)))
return -EFAULT;


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