9  * See the COPYING file in the top-level directory.
13 #include "qemu/host-utils.h"
15 #include "qemu/main-loop.h"
19 #include "exec/address-spaces.h"
33 #define TYPE_XEN_OVERLAY "xen-overlay"
52 void xen_overlay_do_map_page(MemoryRegion *page, uint64_t gpa)  in xen_overlay_do_map_page()  argument
62         if (gpa == INVALID_GPA) {  in xen_overlay_do_map_page()
66             memory_region_set_address(page, gpa);  in xen_overlay_do_map_page()
68     } else if (gpa != INVALID_GPA) {  in xen_overlay_do_map_page()
69         memory_region_add_subregion_overlap(get_system_memory(), gpa, page, 0);  in xen_overlay_do_map_page()
94     memory_region_init_ram(&s->shinfo_mem, OBJECT(dev), "xen:shared_info",  in xen_overlay_realize()
96     memory_region_set_enabled(&s->shinfo_mem, true);  in xen_overlay_realize()
98     s->shinfo_ptr = memory_region_get_ram_ptr(&s->shinfo_mem);  in xen_overlay_realize()
99     s->shinfo_gpa = INVALID_GPA;  in xen_overlay_realize()
100     s->long_mode = false;  in xen_overlay_realize()
101     memset(s->shinfo_ptr, 0, XEN_PAGE_SIZE);  in xen_overlay_realize()
108      * where the guest has set the hypercall page up in 64-bit mode but  in xen_overlay_pre_save()
119     if (s->shinfo_gpa != INVALID_GPA) {  in xen_overlay_post_load()
120         xen_overlay_do_map_page(&s->shinfo_mem, s->shinfo_gpa);  in xen_overlay_post_load()
121         xen_overlay_set_be_shinfo(s->shinfo_gpa >> XEN_PAGE_SHIFT);  in xen_overlay_post_load()
123     if (s->long_mode) {  in xen_overlay_post_load()
127     return 0;  in xen_overlay_post_load()
159     dc->realize = xen_overlay_realize;  in xen_overlay_class_init()
160     dc->vmsd = &xen_overlay_vmstate;  in xen_overlay_class_init()
173                                                              -1, NULL));  in xen_overlay_create()
188 int xen_overlay_map_shinfo_page(uint64_t gpa)  in type_init()
194         return -ENOENT;  in type_init()
199     if (s->shinfo_gpa) {  in type_init()
207     xen_overlay_do_map_page(&s->shinfo_mem, gpa);  in type_init()
208     if (gpa != INVALID_GPA) {  in type_init()
209         ret = xen_overlay_set_be_shinfo(gpa >> XEN_PAGE_SHIFT);  in type_init()
214     s->shinfo_gpa = gpa;  in type_init()
216     return 0;  in type_init()
227     return s->shinfo_ptr;  in xen_overlay_get_shinfo_ptr()
238         return -ENOENT;  in xen_sync_long_mode()
243         xen_overlay_singleton->long_mode = xa.u.long_mode;  in xen_sync_long_mode()
258         return -ENOENT;  in xen_set_long_mode()
263         xen_overlay_singleton->long_mode = xa.u.long_mode;  in xen_set_long_mode()
271     return xen_overlay_singleton && xen_overlay_singleton->long_mode;  in xen_is_long_mode()