QEMU intercepts guest writes to vNVDIMM labels, and then stores them to the backend. When the backend is a real NVDIMM device, QEMU needs to ensure the write persistence before returning to guest, so that the guest labels will not be lost if QEMU exits abnormally.
Haozhong Zhang (2): util/pmem: add function to make writes to pmem persistent mem/nvdimm: ensure persistence of QEMU writes to real NVDIMM device hw/mem/nvdimm.c | 3 ++ include/qemu/pmem.h | 25 ++++++++++ util/Makefile.objs | 1 + util/pmem.c | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 161 insertions(+) create mode 100644 include/qemu/pmem.h create mode 100644 util/pmem.c -- 2.14.1
