x86: reduce dependencies on x86_emulate/x86_emulate.h

Split out struct x86_event to an entirely separate header, and move a few
other items describing the architecture to a new x86-types.h. With a few
forward decls of structures and with a fair number of new #include-s in
.c files, the inclusion of x86_emulate.h (and hence
x86_emulate/x86_emulate.h) can be dropped from all header files except
hvm/emulate.h; it needs additionally adding to hvm/ioreq.h though.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

tools/tests/x86_emulator/Makefile

@@ -305,7 +305,7 @@ $(call cc-option-add,HOSTCFLAGS-x86_64,HOSTCC,-no-integrated-as)
 HOSTCFLAGS += $(CFLAGS_xeninclude) -I. $(HOSTCFLAGS-$(XEN_COMPILE_ARCH))
 
 x86.h := $(addprefix $(XEN_ROOT)/tools/include/xen/asm/,\
-                     x86-vendors.h x86-defns.h msr-index.h) \
+                     x86-vendors.h x86-defns.h x86-types.h x86-event.h msr-index.h) \
          $(addprefix $(XEN_ROOT)/tools/include/xen/lib/x86/, \
                      cpu-policy.h cpuid-autogen.h)
 x86_emulate.h := x86-emulate.h x86_emulate/x86_emulate.h x86_emulate/private.h $(x86.h)

tools/tests/x86_emulator/x86-emulate.h

@@ -38,6 +38,8 @@
 
 #include <xen/asm/msr-index.h>
 #include <xen/asm/x86-defns.h>
+#include <xen/asm/x86-event.h>
+#include <xen/asm/x86-types.h>
 #include <xen/asm/x86-vendors.h>
 
 #include <xen-tools/common-macros.h>