2  * Memory Device Interface
14 #include "hw/mem/memory-device.h"
29     /* dropping const here is fine as we don't touch the memory region */  in memory_device_is_empty()
62         if (dev->realized) { /* only realized memory devices matter */  in memory_device_build_list()
82  * Memslots that are reserved by memory devices (required but still reported
89         /* This is unexpected, and we warned already in the memory notifier. */  in get_reserved_memslots()
137      * Consider our soft-limit across all memory devices. We don't really  in memory_device_memslot_decision_limit()
158     /* We cannot have any other memory devices? So give all to this device. */  in memory_device_memslot_decision_limit()
165      * still available for memory devices.  in memory_device_memslot_decision_limit()
192     /* we will need memory slots for kvm and vhost */  in memory_device_check_addable()
195         error_setg(errp, "hypervisor has not enough free memory slots left");  in memory_device_check_addable()
199         error_setg(errp, "a used vhost backend has not enough free memory slots left");  in memory_device_check_addable()
203     /* will we exceed the total amount of memory specified */  in memory_device_check_addable()
207                    " in use of total space for memory devices 0x" RAM_ADDR_FMT,  in memory_device_check_addable()
228                     " maximum alignment, memory will get fragmented and not"  in memory_device_get_free_addr()
229                     " all 'maxmem' might be usable for memory devices.",  in memory_device_get_free_addr()
241             error_setg(errp, "can't add memory device [0x%" PRIx64 ":0x%" PRIx64  in memory_device_get_free_addr()
242                        "], usable range for memory devices [0x%" PRIx64 ":0x%"  in memory_device_get_free_addr()
249             error_setg(errp, "can't add memory device, device too big");  in memory_device_get_free_addr()
254     /* find address range that will fit new memory device */  in memory_device_get_free_addr()
272                 error_setg(errp, "address range conflicts with memory device"  in memory_device_get_free_addr()
289                    "memory device - memory fragmented due to alignments");  in memory_device_get_free_addr()
309         /* Let's query infotmation even for empty memory devices. */  in qmp_memory_device_list()
355     /* We support empty memory devices even without device memory. */  in memory_device_pre_plug()
361         error_setg(errp, "the configuration is not prepared for memory devices"  in memory_device_pre_plug()
362                          " (e.g., for memory hotplug), consider specifying the"  in memory_device_pre_plug()
378      * We always want the memory region size to be multiples of the memory  in memory_device_pre_plug()
381      * of any additional alignment requirements the memory device might  in memory_device_pre_plug()
386         error_setg(errp, "backend memory size must be multiple of 0x%"  in memory_device_pre_plug()
476     /* dropping const here is fine as we don't touch the memory region */  in memory_device_get_region_size()
492         warn_report("Unexpected memory region mapped into device memory region.");  in memory_devices_region_mod()
497      * The expectation is that each distinct RAM memory region section in  in memory_devices_region_mod()
498      * our region for memory devices consumes exactly one memslot in KVM  in memory_devices_region_mod()
500      * * ROM memory regions don't consume a memslot. These get used very  in memory_devices_region_mod()
501      *   rarely for memory devices (R/O NVDIMMs).  in memory_devices_region_mod()
502      * * Memslots without a fd (memory-backend-ram) don't necessarily  in memory_devices_region_mod()
504      *   the memory would be inaccessible by such vhost devices.  in memory_devices_region_mod()
513         warn_report("Memory devices use more memory slots than indicated as required.");  in memory_devices_region_mod()
536     memory_region_init(&ms->device_memory->mr, OBJECT(ms), "device-memory",  in machine_memory_devices_init()
539                        "device-memory");  in machine_memory_devices_init()
543     /* Track the number of memslots used by memory devices. */  in machine_memory_devices_init()