diff options
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/memory.h | 20 | ||||
| -rw-r--r-- | include/exec/ram_addr.h | 2 | ||||
| -rw-r--r-- | include/exec/ramblock.h | 1 |
3 files changed, 19 insertions, 4 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 8626a355b3..679a847685 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -243,6 +243,9 @@ typedef struct IOMMUTLBEvent { /* RAM FD is opened read-only */ #define RAM_READONLY_FD (1 << 11) +/* RAM can be private that has kvm guest memfd backend */ +#define RAM_GUEST_MEMFD (1 << 12) + static inline void iommu_notifier_init(IOMMUNotifier *n, IOMMUNotify fn, IOMMUNotifierFlag flags, hwaddr start, hwaddr end, @@ -1307,7 +1310,8 @@ bool memory_region_init_ram_nomigrate(MemoryRegion *mr, * @name: Region name, becomes part of RAMBlock name used in migration stream * must be unique within any device * @size: size of the region. - * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_NORESERVE. + * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_NORESERVE, + * RAM_GUEST_MEMFD. * @errp: pointer to Error*, to store an error if it happens. * * Note that this function does not do anything to cause the data in the @@ -1369,7 +1373,7 @@ bool memory_region_init_resizeable_ram(MemoryRegion *mr, * (getpagesize()) will be used. * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, - * RAM_READONLY_FD + * RAM_READONLY_FD, RAM_GUEST_MEMFD * @path: the path in which to allocate the RAM. * @offset: offset within the file referenced by path * @errp: pointer to Error*, to store an error if it happens. @@ -1399,7 +1403,7 @@ bool memory_region_init_ram_from_file(MemoryRegion *mr, * @size: size of the region. * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, - * RAM_READONLY_FD + * RAM_READONLY_FD, RAM_GUEST_MEMFD * @fd: the fd to mmap. * @offset: offset within the file referenced by fd * @errp: pointer to Error*, to store an error if it happens. @@ -1723,6 +1727,16 @@ static inline bool memory_region_is_romd(MemoryRegion *mr) bool memory_region_is_protected(MemoryRegion *mr); /** + * memory_region_has_guest_memfd: check whether a memory region has guest_memfd + * associated + * + * Returns %true if a memory region's ram_block has valid guest_memfd assigned. + * + * @mr: the memory region being queried + */ +bool memory_region_has_guest_memfd(MemoryRegion *mr); + +/** * memory_region_get_iommu: check whether a memory region is an iommu * * Returns pointer to IOMMUMemoryRegion if a memory region is an iommu, diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index de45ba7bc9..07c8f86375 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -110,7 +110,7 @@ long qemu_maxrampagesize(void); * @mr: the memory region where the ram block is * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, - * RAM_READONLY_FD + * RAM_READONLY_FD, RAM_GUEST_MEMFD * @mem_path or @fd: specify the backing file or device * @offset: Offset into target file * @errp: pointer to Error*, to store an error if it happens diff --git a/include/exec/ramblock.h b/include/exec/ramblock.h index 848915ea5b..459c8917de 100644 --- a/include/exec/ramblock.h +++ b/include/exec/ramblock.h @@ -41,6 +41,7 @@ struct RAMBlock { QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers; int fd; uint64_t fd_offset; + int guest_memfd; size_t page_size; /* dirty bitmap used during migration */ unsigned long *bmap; |