Test if the infrastructure works.
Signed-off-by: Wei Liu <li...@microsoft.com>
---
xen/arch/x86/guest/hyperv/hyperv.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/xen/arch/x86/guest/hyperv/hyperv.c
b/xen/arch/x86/guest/hyperv/hyperv.c
index f986c1a805..536ce0d0dd 100644
--- a/xen/arch/x86/guest/hyperv/hyperv.c
+++ b/xen/arch/x86/guest/hyperv/hyperv.c
@@ -23,6 +23,7 @@
#include <asm/fixmap.h>
#include <asm/guest.h>
+#include <asm/guest/hyperv-hcall.h>
#include <asm/guest/hyperv-tlfs.h>
#include <asm/processor.h>
@@ -107,6 +108,15 @@ static void __init setup_hypercall_page(void)
}
set_fixmap_x(FIX_X_HYPERV_HCALL, mfn << PAGE_SHIFT);
+
+ /* XXX Wei: Issue an hypercall here to make sure things are set up
+ * correctly. When there is actual use of the hypercall facility,
+ * this can be removed.
+ */
+ {
+ uint16_t r = hv_do_hypercall(0xffff, 0, 0);
+ BUG_ON(r != HV_STATUS_INVALID_HYPERCALL_CODE);
+ }
}
static void __init setup(void)
--
2.20.1
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