Re: [Qemu-devel] [PATCH v8 0/5] implement vNVDIMM

[Xiao Guangrong]

On 12/05/2015 12:38 AM, Vladimir Sementsov-Ogievskiy wrote:
> On 16.11.2015 13:50, Xiao Guangrong wrote:
> > NVDIMM (A Non-Volatile Dual In-line Memory Module) is going to be supported
> > on Intel's platform.
>
> Hi.
>
> One question: do this mean, that your qemu emulated nvidimm - pmem solution 
> will work only on Intel
> host?

Currently, it is only enabled in x86 emulator, however, it can be easily 
enabled on
other platform which supports acpi.

BTW, you also need to check the linux kernel driver, nfit.ko, which is 
currently only
working on x86 IIUC:
config ACPI_NFIT
        tristate "ACPI NVDIMM Firmware Interface Table (NFIT)"
        depends on PHYS_ADDR_T_64BIT
        depends on BLK_DEV
        depends on ARCH_HAS_MMIO_FLUSH
        select LIBNVDIMM
        help
          Infrastructure to probe ACPI 6 compliant platforms for
          NVDIMMs (NFIT) and register a libnvdimm device tree.  In
          addition to storage devices this also enables libnvdimm to pass
          ACPI._DSM messages for platform/dimm configuration.

          To compile this driver as a module, choose M here:
          the module will be called nfit.

$ git grep ARCH_HAS_MMIO_FLUSH
arch/x86/Kconfig:       select ARCH_HAS_MMIO_FLUSH
drivers/acpi/Kconfig:   depends on ARCH_HAS_MMIO_FLUSH
lib/Kconfig:config ARCH_HAS_MMIO_FLUSH

You should check  ARCH_HAS_MMIO_FLUSH on your platform.

Thanks!