On 07/16/2018 11:32 PM, junyan...@gmx.com wrote:
> From: Junyan He <junyan...@intel.com>
>
> Add a pair of configure options --{enable,disable}-libpmem to control
> whether QEMU is compiled with PMDK libpmem [1].
>
> QEMU may write to the host persistent memory (e.g. in vNVDIMM label
> emulation and live migration), so it must take the proper operations
> to ensure the persistence of its own writes. Depending on the CPU
> models and available instructions, the optimal operation can vary [2].
> PMDK libpmem have already implemented those operations on multiple CPU
> models (x86 and ARM) and the logic to select the optimal ones, so QEMU
> can just use libpmem rather than re-implement them.
>
> Libpem is a part of PMDK project(formerly known as NMVL).
> The project's home page is: http://pmem.io/pmdk/
> And the project's repository is: https://github.com/pmem/pmdk/
>
> For more information about libpmem APIs, you can refer to the comments
> in source code of: pmdk/src/libpmem/pmem.c, begin at line 33.
>
> Signed-off-by: Junyan He <junyan...@intel.com>
> Signed-off-by: Haozhong Zhang <haozhong.zh...@intel.com>
> Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
> Reviewed-by: Igor Mammedov <imamm...@redhat.com>
> ---
> configure | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
r~
