hw/xen/xen-hvm: Reduce included headers

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:314:9: error: implicit declaration of function 'error_report' is invalid in C99
    314 |    error_report("relocate_memory %lu pages from GFN %"HWADDR_PRIx
             ^~~~~~~~~~~~
  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>
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
Message-Id: <20250218162618.46167-6-philmd@linaro.org>

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"
 

hw/i386/xen/xen-hvm.c

@@ -10,10 +10,12 @@
 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/error-report.h"
 #include "qapi/error.h"
 #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 +26,10 @@
 #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;

hw/xen/xen-hvm-common.c

@@ -1,14 +1,21 @@
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/error-report.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;
 

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;