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machine: alias -mem-path and -mem-prealloc into memory-foo backend

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Allow machine to opt in for hostmem backend based initial RAM
even if user uses old -mem-path/prealloc options by providing
  MachineClass::default_ram_id
Follow up patches will incrementally convert machines to new API,
by dropping memory_region_allocate_system_memory() and setting
default_ram_id that board used to use before conversion to keep
migration stream the same.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200219160953.13771-4-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:37 -05:00 • committed by Patchew Importer
parent aa8b183974
commit 900c0ba373
5 changed files with 49 additions and 9 deletions
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16
include/sysemu/hostmem.h
View file

@ -27,6 +27,22 @@
#define MEMORY_BACKEND_CLASS(klass) \
OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
/* hostmem-ram.c */
/**
* @TYPE_MEMORY_BACKEND_RAM:
* name of backend that uses mmap on the anonymous RAM
*/
#define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
/* hostmem-file.c */
/**
* @TYPE_MEMORY_BACKEND_FILE:
* name of backend that uses mmap on a file descriptor
*/
#define TYPE_MEMORY_BACKEND_FILE "memory-backend-file"
typedef struct HostMemoryBackend HostMemoryBackend;
typedef struct HostMemoryBackendClass HostMemoryBackendClass;
/**