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| author | Steve Sistare <steven.sistare@oracle.com> | 2025-01-15 11:00:29 -0800 |
|---|---|---|
| committer | Fabiano Rosas <farosas@suse.de> | 2025-01-29 11:43:03 -0300 |
| commit | 3ec02148160a8147187fce211d1251af2c4cf9f1 (patch) | |
| tree | 1ead44b267a1b84782097c9d38baf2eb8e1e60d0 /include/exec | |
| parent | 719168fba7c3215cc996dcfd32a6e5e9c7b8eee0 (diff) | |
| download | qemu-3ec02148160a8147187fce211d1251af2c4cf9f1.zip qemu-3ec02148160a8147187fce211d1251af2c4cf9f1.tar.gz qemu-3ec02148160a8147187fce211d1251af2c4cf9f1.tar.bz2 | |
physmem: qemu_ram_alloc_from_fd extensions
Extend qemu_ram_alloc_from_fd to support resizable ram, and define
qemu_ram_resize_cb to clean up the API.
Add a grow parameter to extend the file if necessary. However, if
grow is false, a zero-sized file is always extended.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1736967650-129648-4-git-send-email-steven.sistare@oracle.com
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/ram_addr.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index ff157c1..94bb3cc 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -111,23 +111,30 @@ long qemu_maxrampagesize(void); * * Parameters: * @size: the size in bytes of the ram block + * @max_size: the maximum size of the block after resizing * @mr: the memory region where the ram block is + * @resized: callback after calls to qemu_ram_resize * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, * RAM_READONLY_FD, RAM_GUEST_MEMFD * @mem_path or @fd: specify the backing file or device * @offset: Offset into target file + * @grow: extend file if necessary (but an empty file is always extended). * @errp: pointer to Error*, to store an error if it happens * * Return: * On success, return a pointer to the ram block. * On failure, return NULL. */ +typedef void (*qemu_ram_resize_cb)(const char *, uint64_t length, void *host); + RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, uint32_t ram_flags, const char *mem_path, off_t offset, Error **errp); -RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr, +RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, ram_addr_t max_size, + qemu_ram_resize_cb resized, MemoryRegion *mr, uint32_t ram_flags, int fd, off_t offset, + bool grow, Error **errp); RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, @@ -135,9 +142,7 @@ RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, RAMBlock *qemu_ram_alloc(ram_addr_t size, uint32_t ram_flags, MemoryRegion *mr, Error **errp); RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size, - void (*resized)(const char*, - uint64_t length, - void *host), + qemu_ram_resize_cb resized, MemoryRegion *mr, Error **errp); void qemu_ram_free(RAMBlock *block); |