xen/riscv: introduce guest_atomics.h

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/riscv/include/asm/guest_atomics.h b/xen/arch/riscv/include/asm/guest_atomics.h
new file mode 100644 (file)
index 0000000..de54914
--- /dev/null
+++ b/xen/arch/riscv/include/asm/guest_atomics.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_RISCV_GUEST_ATOMICS_H
+#define __ASM_RISCV_GUEST_ATOMICS_H
+
+#include <xen/bug.h>
+
+#define guest_testop(name)                                                  \
+static inline int guest_##name(struct domain *d, int nr, volatile void *p)  \
+{                                                                           \
+    BUG_ON("unimplemented");                                                \
+                                                                            \
+    return 0;                                                               \
+}
+
+#define guest_bitop(name)                                                   \
+static inline void guest_##name(struct domain *d, int nr, volatile void *p) \
+{                                                                           \
+    BUG_ON("unimplemented");                                                \
+}
+
+guest_bitop(set_bit)
+guest_bitop(clear_bit)
+guest_bitop(change_bit)
+
+#undef guest_bitop
+
+guest_testop(test_and_set_bit)
+guest_testop(test_and_clear_bit)
+guest_testop(test_and_change_bit)
+
+#undef guest_testop
+
+#define guest_test_bit(d, nr, p) ((void)(d), test_bit(nr, p))
+
+#endif /* __ASM_RISCV_GUEST_ATOMICS_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */