KVM: selftests: Add helpers to make Xen-style VMCALL/VMMCALL hypercalls

[linux-block.git] / tools / testing / selftests / kvm / lib / x86_64 / processor.c

diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index ff901cb47ffcab3fe7e1d2c3eacfd94cc789e325..c39a4353ba194c13257e1aaae62c0ee6889c776d 100644 (file)
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1161,6 +1161,16 @@ uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2,
        return X86_HYPERCALL("a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3));
 }
 
+uint64_t __xen_hypercall(uint64_t nr, uint64_t a0, void *a1)
+{
+       return X86_HYPERCALL("a"(nr), "D"(a0), "S"(a1));
+}
+
+void xen_hypercall(uint64_t nr, uint64_t a0, void *a1)
+{
+       GUEST_ASSERT(!__xen_hypercall(nr, a0, a1));
+}
+
 const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void)
 {
        static struct kvm_cpuid2 *cpuid;