diff options
Diffstat (limited to 'include/exec/memory.h')
| -rw-r--r-- | include/exec/memory.h | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index b114f5454b..b116f7c64e 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -155,6 +155,13 @@ typedef struct IOMMUTLBEvent { */ #define RAM_UF_WRITEPROTECT (1 << 6) +/* + * RAM is mmap-ed with MAP_NORESERVE. When set, reserving swap space (or huge + * pages if applicable) is skipped: will bail out if not supported. When not + * set, the OS will do the reservation, if supported for the memory type. + */ +#define RAM_NORESERVE (1 << 7) + static inline void iommu_notifier_init(IOMMUNotifier *n, IOMMUNotify fn, IOMMUNotifierFlag flags, hwaddr start, hwaddr end, @@ -940,27 +947,27 @@ void memory_region_init_ram_nomigrate(MemoryRegion *mr, Error **errp); /** - * memory_region_init_ram_shared_nomigrate: Initialize RAM memory region. - * Accesses into the region will - * modify memory directly. + * memory_region_init_ram_flags_nomigrate: Initialize RAM memory region. + * Accesses into the region will + * modify memory directly. * * @mr: the #MemoryRegion to be initialized. * @owner: the object that tracks the region's reference count * @name: Region name, becomes part of RAMBlock name used in migration stream * must be unique within any device * @size: size of the region. - * @share: allow remapping RAM to different addresses + * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_NORESERVE. * @errp: pointer to Error*, to store an error if it happens. * - * Note that this function is similar to memory_region_init_ram_nomigrate. - * The only difference is part of the RAM region can be remapped. + * Note that this function does not do anything to cause the data in the + * RAM memory region to be migrated; that is the responsibility of the caller. */ -void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - bool share, - Error **errp); +void memory_region_init_ram_flags_nomigrate(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + uint32_t ram_flags, + Error **errp); /** * memory_region_init_resizeable_ram: Initialize memory region with resizeable @@ -1005,10 +1012,8 @@ void memory_region_init_resizeable_ram(MemoryRegion *mr, * @size: size of the region. * @align: alignment of the region base address; if 0, the default alignment * (getpagesize()) will be used. - * @ram_flags: Memory region features: - * - RAM_SHARED: memory must be mmaped with the MAP_SHARED flag - * - RAM_PMEM: the memory is persistent memory - * Other bits are ignored now. + * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, + * RAM_NORESERVE, * @path: the path in which to allocate the RAM. * @readonly: true to open @path for reading, false for read/write. * @errp: pointer to Error*, to store an error if it happens. @@ -1034,7 +1039,8 @@ void memory_region_init_ram_from_file(MemoryRegion *mr, * @owner: the object that tracks the region's reference count * @name: the name of the region. * @size: size of the region. - * @share: %true if memory must be mmaped with the MAP_SHARED flag + * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, + * RAM_NORESERVE. * @fd: the fd to mmap. * @offset: offset within the file referenced by fd * @errp: pointer to Error*, to store an error if it happens. @@ -1046,7 +1052,7 @@ void memory_region_init_ram_from_fd(MemoryRegion *mr, Object *owner, const char *name, uint64_t size, - bool share, + uint32_t ram_flags, int fd, ram_addr_t offset, Error **errp); |