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Hi,

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"Host Memory Backends" and "Memory devices" queue ("mem"):
 - New "offset" option for memory-backend-file
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Merge tag 'mem-2023-05-23' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- New "offset" option for memory-backend-file

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# gpg:                 aka "David Hildenbrand <davidhildenbrand@gmail.com>" [undefined]
# gpg:                 aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
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# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D  FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2023-05-23' of https://github.com/davidhildenbrand/qemu:
  hostmem-file: add offset option

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-05-23 10:57:25 -07:00
commit aa33508196
9 changed files with 69 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/exec/memory.h
View file

@ -1326,6 +1326,7 @@ void memory_region_init_resizeable_ram(MemoryRegion *mr,
* @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM,
* RAM_NORESERVE,
* @path: the path in which to allocate the RAM.
* @offset: offset within the file referenced by path
* @readonly: true to open @path for reading, false for read/write.
* @errp: pointer to Error*, to store an error if it happens.
*
@ -1339,6 +1340,7 @@ void memory_region_init_ram_from_file(MemoryRegion *mr,
uint64_t align,
uint32_t ram_flags,
const char *path,
ram_addr_t offset,
bool readonly,
Error **errp);

3
include/exec/ram_addr.h
View file

@ -110,6 +110,7 @@ long qemu_maxrampagesize(void);
* @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM,
* RAM_NORESERVE.
* @mem_path or @fd: specify the backing file or device
* @offset: Offset into target file
* @readonly: true to open @path for reading, false for read/write.
* @errp: pointer to Error*, to store an error if it happens
*
@ -119,7 +120,7 @@ long qemu_maxrampagesize(void);
*/
RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
uint32_t ram_flags, const char *mem_path,
bool readonly, Error **errp);
off_t offset, bool readonly, Error **errp);
RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr,
uint32_t ram_flags, int fd, off_t offset,
bool readonly, Error **errp);

1
include/exec/ramblock.h
View file

@ -40,6 +40,7 @@ struct RAMBlock {
QLIST_ENTRY(RAMBlock) next;
QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers;
int fd;
uint64_t fd_offset;
size_t page_size;
/* dirty bitmap used during migration */
unsigned long *bmap;