This patch is for testing only and adds a simple I/O looping test to
hvmloader in order to repo the evtchn hang problem. Applies to the
xen-unstable-hvm.hg repository.
Signed-off-by: Tom Woller <thomas.woller@amd.com>
diff -r d8bb56042ef1 tools/firmware/hvmloader/hvmloader.c
--- a/tools/firmware/hvmloader/hvmloader.c Tue Jan 24 20:26:57 2006
+++ b/tools/firmware/hvmloader/hvmloader.c Tue Jan 24 14:35:03 2006
@@ -159,6 +159,16 @@
return __builtin_memcmp(id, "AuthenticAMD", 12) == 0;
}
+#define io_operation_out() \
+ __asm__ __volatile__("nop\n" \
+ "movw $0x3Fb, %dx\n" \
+ "nop\n" \
+ "mov $0x80, %al\n" \
+ "nop\n" \
+ "out %al, %dx\n" \
+ "nop\n" \
+ )
+
int
main(void)
{
@@ -192,6 +202,13 @@
if (check_amd()) {
/* AMD implies this is SVM */
puts("SVM go ...\n");
+ while(1)
+ {
+ /* infinite out to repo guest hang */
+ io_operation_out();
+ }
+ puts("NEVER GET HERE WITH IO TEST ...\n");
+
vmmcall(SVM_VMMCALL_RESET_TO_REALMODE, 0, 0, 0, 0);
} else {
puts("Loading VMXAssist ...\n");
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