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/block/raw-aio.h

@@ -12,9 +12,11 @@
  * Contributions after 2012-01-13 are licensed under the terms of the
  * GNU GPL, version 2 or (at your option) any later version.
  */
+
 #ifndef QEMU_RAW_AIO_H
 #define QEMU_RAW_AIO_H
 
+#include "block/aio.h"
 #include "qemu/coroutine.h"
 #include "qemu/iov.h"
 

include/block/write-threshold.h

@@ -9,9 +9,11 @@
  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  * See the COPYING.LIB file in the top-level directory.
  */
+
 #ifndef BLOCK_WRITE_THRESHOLD_H
 #define BLOCK_WRITE_THRESHOLD_H
 
+#include "block/block_int.h"
 
 /*
  * bdrv_write_threshold_set:

include/disas/disas.h

@@ -1,6 +1,7 @@
 #ifndef QEMU_DISAS_H
 #define QEMU_DISAS_H
 
+#include "exec/hwaddr.h"
 
 #ifdef NEED_CPU_H
 #include "cpu.h"

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 */
 

include/fpu/softfloat-macros.h

@@ -82,6 +82,8 @@ this code that are retained.
 #ifndef FPU_SOFTFLOAT_MACROS_H
 #define FPU_SOFTFLOAT_MACROS_H
 
+#include "fpu/softfloat.h"
+
 /*----------------------------------------------------------------------------
 | Shifts `a' right by the number of bits given in `count'.  If any nonzero
 | bits are shifted off, they are ``jammed'' into the least significant bit of

include/hw/acpi/pci.h

@@ -22,9 +22,12 @@
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, see <http://www.gnu.org/licenses/>.
  */
+
 #ifndef HW_ACPI_PCI_H
 #define HW_ACPI_PCI_H
 
+#include "hw/acpi/bios-linker-loader.h"
+
 typedef struct AcpiMcfgInfo {
     uint64_t base;
     uint32_t size;

include/hw/acpi/tco.h

@@ -6,9 +6,12 @@
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  */
+
 #ifndef HW_ACPI_TCO_H
 #define HW_ACPI_TCO_H
 
+#include "exec/memory.h"
+#include "migration/vmstate.h"
 
 /* As per ICH9 spec, the internal timer has an error of ~0.6s on every tick */
 #define TCO_TICK_NSEC 600000000LL

include/hw/adc/stm32f2xx_adc.h

@@ -25,6 +25,8 @@
 #ifndef HW_STM32F2XX_ADC_H
 #define HW_STM32F2XX_ADC_H
 
+#include "hw/sysbus.h"
+
 #define ADC_SR    0x00
 #define ADC_CR1   0x04
 #define ADC_CR2   0x08

include/hw/arm/allwinner-a10.h

@@ -11,6 +11,7 @@
 #include "hw/ide/ahci.h"
 
 #include "sysemu/sysemu.h"
+#include "target/arm/cpu.h"
 
 
 #define AW_A10_PIC_REG_BASE     0x01c20400

include/hw/arm/aspeed_soc.h

@@ -22,6 +22,7 @@
 #include "hw/ssi/aspeed_smc.h"
 #include "hw/watchdog/wdt_aspeed.h"
 #include "hw/net/ftgmac100.h"
+#include "target/arm/cpu.h"
 
 #define ASPEED_SPIS_NUM  2
 #define ASPEED_WDTS_NUM  3

include/hw/arm/bcm2836.h

@@ -13,6 +13,7 @@
 
 #include "hw/arm/bcm2835_peripherals.h"
 #include "hw/intc/bcm2836_control.h"
+#include "target/arm/cpu.h"
 
 #define TYPE_BCM283X "bcm283x"
 #define BCM283X(obj) OBJECT_CHECK(BCM283XState, (obj), TYPE_BCM283X)

include/hw/arm/exynos4210.h

@@ -19,13 +19,12 @@
  *
  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, see <http://www.gnu.org/licenses/>.
- *
  */
 
 #ifndef EXYNOS4210_H
 #define EXYNOS4210_H
 
-#include "exec/memory.h"
+#include "hw/sysbus.h"
 #include "target/arm/cpu-qom.h"
 
 #define EXYNOS4210_NCPUS                    2

include/hw/arm/fsl-imx25.h

@@ -27,6 +27,7 @@
 #include "hw/i2c/imx_i2c.h"
 #include "hw/gpio/imx_gpio.h"
 #include "exec/memory.h"
+#include "target/arm/cpu.h"
 
 #define TYPE_FSL_IMX25 "fsl,imx25"
 #define FSL_IMX25(obj) OBJECT_CHECK(FslIMX25State, (obj), TYPE_FSL_IMX25)