[PATCH 5/8] hw/xen/xen-hvm: Reduce included headers

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Have "hw/xen/xen-hvm-common.h" include the bare minimal set
of headers. Adapt sources to avoid errors when refactoring
unrelated headers such:

  include/hw/xen/xen-hvm-common.h:71:5: error: unknown type name ‘xenevtchn_handle’
     71 |     xenevtchn_handle *xce_handle;
        |     ^~~~~~~~~~~~~~~~
  hw/xen/xen-hvm-common.c: In function ‘cpu_get_ioreq’:
  hw/xen/xen-hvm-common.c:227:13: error: implicit declaration of function ‘hw_error’
    227 |             hw_error("Fatal error while trying to get io event!\n");
        |             ^~~~~~~~
        |             herror
  hw/xen/xen-hvm-common.c: In function ‘handle_ioreq’:
  hw/xen/xen-hvm-common.c:446:34: error: ‘target_ulong’ undeclared (first use in this function)
    446 |             (req->size < sizeof (target_ulong))) {
        |                                  ^~~~~~~~~~~~
  hw/i386/xen/xen-hvm.c: In function ‘xen_add_to_physmap’:
  hw/i386/xen/xen-hvm.c:298:22: error: implicit declaration of function ‘xen_replace_cache_entry’
    298 |         uint8_t *p = xen_replace_cache_entry(phys_offset, start_addr, size);
        |                      ^~~~~~~~~~~~~~~~~~~~~~~
  hw/i386/xen/xen-hvm.c: In function ‘xen_log_global_start’:
  hw/i386/xen/xen-hvm.c:465:9: error: implicit declaration of function ‘xen_enabled’
    465 |     if (xen_enabled()) {
        |         ^~~~~~~~~~~
  hw/i386/xen/xen-hvm.c: In function ‘regs_to_cpu’:
  hw/i386/xen/xen-hvm.c:487:5: error: unknown type name ‘X86CPU’
    487 |     X86CPU *cpu;
        |     ^~~~~~
  hw/i386/xen/xen-hvm.c:492:15: error: ‘R_EAX’ undeclared (first use in this function)
    492 |     env->regs[R_EAX] = req->data;
        |               ^~~~~
        |               REG_RAX

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/xen/xen-hvm-common.h | 14 +++-----------
 hw/arm/xen-stubs.c              |  5 ++---
 hw/i386/xen/xen-hvm.c           |  5 +++++
 hw/xen/xen-hvm-common.c         |  6 ++++++
 4 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/include/hw/xen/xen-hvm-common.h b/include/hw/xen/xen-hvm-common.h
index c1ea2c0d787..19df5600a39 100644
--- a/include/hw/xen/xen-hvm-common.h
+++ b/include/hw/xen/xen-hvm-common.h
@@ -1,18 +1,10 @@
 #ifndef HW_XEN_HVM_COMMON_H
 #define HW_XEN_HVM_COMMON_H
 
-#include "qemu/units.h"
-
-#include "cpu.h"
-#include "hw/pci/pci.h"
-#include "hw/hw.h"
+#include "qemu/queue.h"
+#include "exec/hwaddr.h"
 #include "hw/xen/xen_native.h"
-#include "hw/xen/xen-legacy-backend.h"
-#include "system/runstate.h"
-#include "system/system.h"
-#include "system/xen.h"
-#include "system/xen-mapcache.h"
-#include "qemu/error-report.h"
+#include "hw/xen/xen_backend_ops.h"
 #include <xen/hvm/ioreq.h>
 
 extern MemoryRegion xen_memory;
diff --git a/hw/arm/xen-stubs.c b/hw/arm/xen-stubs.c
index 34beb8b08cb..5551584dc20 100644
--- a/hw/arm/xen-stubs.c
+++ b/hw/arm/xen-stubs.c
@@ -5,10 +5,9 @@
  */
 
 #include "qemu/osdep.h"
-#include "qemu/error-report.h"
 #include "qapi/qapi-commands-migration.h"
-#include "hw/boards.h"
-#include "system/system.h"
+#include "system/xen.h"
+#include "hw/hw.h"
 #include "hw/xen/xen-hvm-common.h"
 #include "hw/xen/arch_hvm.h"
 
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index d3df488c483..67b7c223aee 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -14,6 +14,7 @@
 #include "qapi/qapi-commands-migration.h"
 #include "trace.h"
 
+#include "hw/hw.h"
 #include "hw/i386/pc.h"
 #include "hw/irq.h"
 #include "hw/i386/apic-msidef.h"
@@ -24,6 +25,10 @@
 #include "hw/xen/arch_hvm.h"
 #include <xen/hvm/e820.h>
 #include "exec/target_page.h"
+#include "target/i386/cpu.h"
+#include "system/runstate.h"
+#include "system/xen-mapcache.h"
+#include "system/xen.h"
 
 static MemoryRegion ram_640k, ram_lo, ram_hi;
 static MemoryRegion *framebuffer;
diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index 7ffbbfea23b..3828105c95e 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -1,14 +1,20 @@
 #include "qemu/osdep.h"
 #include "qemu/units.h"
 #include "qapi/error.h"
+#include "exec/target_long.h"
 #include "exec/target_page.h"
 #include "trace.h"
 
+#include "hw/hw.h"
 #include "hw/pci/pci_host.h"
 #include "hw/xen/xen-hvm-common.h"
 #include "hw/xen/xen-bus.h"
 #include "hw/boards.h"
 #include "hw/xen/arch_hvm.h"
+#include "system/runstate.h"
+#include "system/system.h"
+#include "system/xen.h"
+#include "system/xen-mapcache.h"
 
 MemoryRegion xen_memory, xen_grants;
 
-- 
2.47.1