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https://github.com/Motorhead1991/qemu.git
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Create MAP_SHARED RAMBlocks by mmap'ing a file descriptor rather than using MAP_ANON, so the memory can be accessed in another process by passing and mmap'ing the fd. This will allow CPR to support memory-backend-ram and memory-backend-shm objects, provided the user creates them with share=on. Use memfd_create if available because it has no constraints. If not, use POSIX shm_open. However, allocation on the opened fd may fail if the shm mount size is too small, even if the system has free memory, so for backwards compatibility fall back to qemu_anon_ram_alloc/MAP_ANON on failure. For backwards compatibility on Windows, always use MAP_ANON. share=on has no purpose there, but the syntax is accepted, and must continue to work. Lastly, quietly fall back to MAP_ANON if the system does not support qemu_ram_alloc_from_fd. Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Peter Xu <peterx@redhat.com> Link: https://lore.kernel.org/r/1736967650-129648-5-git-send-email-steven.sistare@oracle.com Signed-off-by: Fabiano Rosas <farosas@suse.de> |
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| .. | ||
| arch_init.c | ||
| async-teardown.c | ||
| balloon.c | ||
| bootdevice.c | ||
| cpu-timers.c | ||
| cpus.c | ||
| datadir.c | ||
| device_tree-stub.c | ||
| device_tree.c | ||
| dirtylimit.c | ||
| dma-helpers.c | ||
| globals.c | ||
| ioport.c | ||
| main.c | ||
| memory.c | ||
| memory_ldst.c.inc | ||
| memory_mapping.c | ||
| meson.build | ||
| physmem.c | ||
| qdev-monitor.c | ||
| qemu-seccomp.c | ||
| qtest.c | ||
| rtc.c | ||
| runstate-action.c | ||
| runstate-hmp-cmds.c | ||
| runstate.c | ||
| tpm-hmp-cmds.c | ||
| tpm.c | ||
| trace-events | ||
| trace.h | ||
| vl.c | ||
| watchpoint.c | ||