Author: cperciva
Date: Thu Nov 25 15:05:21 2010
New Revision: 215818
URL: http://svn.freebsd.org/changeset/base/215818
Log:
Rename HYPERVISOR_multicall (which performs the multicall hypercall) to
_HYPERVISOR_multicall, and create a new HYPERVISOR_multicall function which
invokes _HYPERVISOR_multicall and checks that the individual hypercalls all
succeeded.
Modified:
head/sys/i386/include/xen/hypercall.h
head/sys/i386/xen/xen_machdep.c
Modified: head/sys/i386/include/xen/hypercall.h
==============================================================================
--- head/sys/i386/include/xen/hypercall.h Thu Nov 25 13:39:55 2010
(r215817)
+++ head/sys/i386/include/xen/hypercall.h Thu Nov 25 15:05:21 2010
(r215818)
@@ -234,8 +234,9 @@ HYPERVISOR_memory_op(
return _hypercall2(int, memory_op, cmd, arg);
}
+int HYPERVISOR_multicall(multicall_entry_t *, int);
static inline int
-HYPERVISOR_multicall(
+_HYPERVISOR_multicall(
void *call_list, int nr_calls)
{
return _hypercall2(int, multicall, call_list, nr_calls);
Modified: head/sys/i386/xen/xen_machdep.c
==============================================================================
--- head/sys/i386/xen/xen_machdep.c Thu Nov 25 13:39:55 2010
(r215817)
+++ head/sys/i386/xen/xen_machdep.c Thu Nov 25 15:05:21 2010
(r215818)
@@ -1177,6 +1177,27 @@ trap_info_t trap_table[] = {
{ 0, 0, 0, 0 }
};
+/* Perform a multicall and check that individual calls succeeded. */
+int
+HYPERVISOR_multicall(struct multicall_entry * call_list, int nr_calls)
+{
+ int ret = 0;
+ int i;
+
+ /* Perform the multicall. */
+ PANIC_IF(_HYPERVISOR_multicall(call_list, nr_calls));
+
+ /* Check the results of individual hypercalls. */
+ for (i = 0; i < nr_calls; i++)
+ if (unlikely(call_list[i].result < 0))
+ ret++;
+ if (unlikely(ret > 0))
+ panic("%d multicall(s) failed: cpu %d\n",
+ ret, smp_processor_id());
+
+ /* If we didn't panic already, everything succeeded. */
+ return (0);
+}
/********** CODE WORTH KEEPING ABOVE HERE *****************/
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