include: Rename sysemu/ -> system/

Headers in include/sysemu/ are not only related to system
*emulation*, they are also used by virtualization. Rename
as system/ which is clearer.

Files renamed manually then mechanical change using sed tool.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Lei Yang <leiyang@redhat.com>
Message-Id: <20241203172445.28576-1-philmd@linaro.org>

include/system/xen.h

@@ -0,0 +1,54 @@
+/*
+ * QEMU Xen support
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+/* header to be included in non-Xen-specific code */
+
+#ifndef SYSTEM_XEN_H
+#define SYSTEM_XEN_H
+
+#ifdef CONFIG_USER_ONLY
+#error Cannot include system/xen.h from user emulation
+#endif
+
+#include "exec/cpu-common.h"
+
+#ifdef COMPILING_PER_TARGET
+# ifdef CONFIG_XEN
+#  define CONFIG_XEN_IS_POSSIBLE
+# endif
+#else
+# define CONFIG_XEN_IS_POSSIBLE
+#endif /* COMPILING_PER_TARGET */
+
+#ifdef CONFIG_XEN_IS_POSSIBLE
+
+extern bool xen_allowed;
+
+#define xen_enabled()           (xen_allowed)
+
+void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length);
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
+                   struct MemoryRegion *mr, Error **errp);
+
+#else /* !CONFIG_XEN_IS_POSSIBLE */
+
+#define xen_enabled() 0
+static inline void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length)
+{
+    /* nothing */
+}
+static inline void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
+                                 MemoryRegion *mr, Error **errp)
+{
+    g_assert_not_reached();
+}
+
+#endif /* CONFIG_XEN_IS_POSSIBLE */
+
+bool xen_mr_is_memory(MemoryRegion *mr);
+bool xen_mr_is_grants(MemoryRegion *mr);
+#endif