include: Make headers more self-contained

Back in 2016, we discussed[1] rules for headers, and these were
generally liked:

1. Have a carefully curated header that's included everywhere first.  We
   got that already thanks to Peter: osdep.h.

2. Headers should normally include everything they need beyond osdep.h.
   If exceptions are needed for some reason, they must be documented in
   the header.  If all that's needed from a header is typedefs, put
   those into qemu/typedefs.h instead of including the header.

3. Cyclic inclusion is forbidden.

This patch gets include/ closer to obeying 2.

It's actually extracted from my "[RFC] Baby steps towards saner
headers" series[2], which demonstrates a possible path towards
checking 2 automatically.  It passes the RFC test there.

[1] Message-ID: <87h9g8j57d.fsf@blackfin.pond.sub.org>
    https://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg03345.html
[2] Message-Id: <20190711122827.18970-1-armbru@redhat.com>
    https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg02715.html

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-2-armbru@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>

include/exec/cputlb.h

@@ -16,9 +16,12 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
+
 #ifndef CPUTLB_H
 #define CPUTLB_H
 
+#include "exec/cpu-common.h"
+
 #if !defined(CONFIG_USER_ONLY)
 /* cputlb.c */
 void tlb_protect_code(ram_addr_t ram_addr);

include/exec/exec-all.h

@@ -20,6 +20,7 @@
 #ifndef EXEC_ALL_H
 #define EXEC_ALL_H
 
+#include "cpu.h"
 #include "exec/tb-context.h"
 #include "sysemu/cpus.h"
 

include/exec/ioport.h

@@ -24,6 +24,8 @@
 #ifndef IOPORT_H
 #define IOPORT_H
 
+#include "exec/memory.h"
+
 #define MAX_IOPORTS     (64 * 1024)
 #define IOPORTS_MASK    (MAX_IOPORTS - 1)
 

include/exec/memory-internal.h

@@ -20,6 +20,8 @@
 #ifndef MEMORY_INTERNAL_H
 #define MEMORY_INTERNAL_H
 
+#include "cpu.h"
+
 #ifndef CONFIG_USER_ONLY
 static inline AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv)
 {

include/exec/ram_addr.h

@@ -20,6 +20,7 @@
 #define RAM_ADDR_H
 
 #ifndef CONFIG_USER_ONLY
+#include "cpu.h"
 #include "hw/xen/xen.h"
 #include "sysemu/tcg.h"
 #include "exec/ramlist.h"

include/exec/softmmu-semi.h

@@ -10,6 +10,8 @@
 #ifndef SOFTMMU_SEMI_H
 #define SOFTMMU_SEMI_H
 
+#include "cpu.h"
+
 static inline uint64_t softmmu_tget64(CPUArchState *env, target_ulong addr)
 {
     uint64_t val;

include/exec/tb-hash.h

@@ -20,6 +20,8 @@
 #ifndef EXEC_TB_HASH_H
 #define EXEC_TB_HASH_H
 
+#include "exec/cpu-defs.h"
+#include "exec/exec-all.h"
 #include "qemu/xxhash.h"
 
 #ifdef CONFIG_SOFTMMU

include/exec/user/thunk.h

@@ -16,10 +16,12 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
+
 #ifndef THUNK_H
 #define THUNK_H
 
 #include "cpu.h"
+#include "exec/user/abitypes.h"
 
 /* types enums definitions */